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• Configuring VLAN's on two HP procurve switches

  - by pan

  Trying to route a new ISP (Microwave link) from one of my out buildings to my computer room and hence my firewall. Old ISP came direct into firewall. In the outbuilding the Microwave modem connects with cat5 to HP Procurve 2524 switch. Because this ISP is coming through my internal network, I plan on using a new vlan called "airspeed" only for this ISP traffic. Up until now I've just been using the Default_vlan on both HP switches (4108 + 2524). So far I've been unable to ping from my laptop to the ISP modem both of which are on the new vlan 2 ("Airspeed"). No traffic needs to cross from vlan 2 to vlan 1 so I've left the ports as untagged. I've used the subnet provide from my ISP as the new vlan 2 subnet. Can anybody see what I'm doing wrong here? I've added the configuration of both switch below. Rough diagram: Microwave modem (Gateway IP 77.75.00.49) | HP 2524 switch (port 24) | HP 2524 switch fibre link | HP 4108GL switch fibre link | HP 4108GL switch (port D1) | Laptop configured with IP 77.75.00.50 (for testing but will be connected to firewall) And my 4108GL config: ; J4865A Configuration Editor; Created on release #G.07.21 hostname "HP ProCurve Switch 4108GL" cdp run module 1 type J4864A module 2 type J4862B module 3 type J4862B module 4 type J4862B ip default-gateway 128.1.146.50 snmp-server community "public" Unrestricted snmp-server host 128.1.146.51 "public" Not-INFO snmp-server host 128.1.146.38 "public" vlan 1 name "DEFAULT_VLAN" untagged A1-A3,B1-B24,C1-C24,D2-D24 ip address 128.1.146.203 255.255.0.0 no untagged D1 exit vlan 2 name "Airspeed" untagged D1 ip address 77.75.00.51 255.255.255.248 exit Finally my 2524 config: ; J4813A Configuration Editor; Created on release #F.04.08 hostname "HP ProCurve Switch 2524" cdp run ip default-gateway 0.0.0.0 snmp-server community "public" Unrestricted snmp-server host 128.1.146.51 "public" Not-INFO snmp-server host 128.1.146.51 "public" snmp-server host 128.1.146.38 "public" vlan 1 name "DEFAULT_VLAN" untagged 1-23,25-26 no untagged 24 ip address 128.1.146.204 255.255.0.0 exit vlan 2 name "Airspeed" untagged 24 ip address 77.75.00.51 255.255.255.248 exit no aaa port-access authenticator active

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• Mikrotik and NAT/Routing issue

  - by arul

  I have basic NAT/Routing problem with Mikrotik RB750 that I've been unable to solve over the past days. From our ISP we have 26 IP addresses: 10.10.10.192/27, with 10.10.10.193 being the gateway and 10.10.10.194 the first available IP. What I need is that everything connected to ether2 gets a public IP from the DHCP server, and everything connected to ether3 gets a local IP from another DHCP (192.168.100.0/24). All clients should have internet access (I'll figure out bandwidth throttling later) and optimally just 'see' each other (all boxes are Win7, I guess this can ultimately be handled with VPN). Here is my setup: ether1 (10.10.10.194) is connected directly to ISP. 20 clients connected to ether2(10.10.10.195), and another 20 to ether3(10.10.10.196) (both through same 24 port switches). This is my setup, which doesn't work, all 20 clients from ether2 can access the internet, though all comm. seems to come from 10.10.10.194 (is this due to the masquerade on ether1?), and ether3 can't access the internet at all. I think that I need to masquerade ether3, and SNAT/DNAT or NETMAP ether2, but that doesn't work either, I guess that I need to somehow 'wire' both ether2+3 to ether1. Address list: # ADDRESS NETWORK INTERFACE 0 ;;; public 10.10.10.194/32 10.10.10.192 ether1-gateway 1 ;;; inner DHCP 192.168.100.0/24 192.168.100.0 ether3-private 2 ;;; public 10.10.10.195/32 10.10.10.192 ether2-pub 3 ;;; public 10.10.10.196/32 10.10.10.192 ether3-private NAT 0 ;;; ether3 nat chain=srcnat action=src-nat to-addresses=10.10.10.196 src-address=192.168.100.0/24 out-interface=ether3-private 1 ;;; ether3 nat chain=dstnat action=dst-nat to-addresses=192.168.100.0/24 in-interface=ether3-private 2 ;;; ether1 masquerade chain=srcnat action=masquerade to-addresses=10.10.10.194 out-interface=ether1-gateway Routes: # DST-ADDRESS PREF-SRC GATEWAY DISTANCE 0 A S 0.0.0.0/0 ether1-gateway 1 2 A S 10.10.10.192/27 10.10.10.195 ether2-pub 1 3 ADC 10.10.10.192/32 10.10.10.195 ether2-pub 0 ether1-gateway ether3-private 4 ADC 192.168.100.0/24 192.168.100.0 ether3-private 0 IP Pools: # NAME RANGES 0 public-pool 10.10.10.201-10.10.10.220 1 private-pool 192.168.100.2-192.168.100.254 DHCP configs: # NAME INTERFACE RELAY ADDRESS-POOL LEASE-TIME ADD-ARP 0 public-dhcp ether2-pub public-pool 3d 1 private-dhcp ether3-private private-pool 3d Thanks!

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• PHP app breaks on Nginx, but works on Apache

  - by rizon1990

  I want to migrate a PHP application from Apache to Nginx. The problem is that the App breaks, because the routing doesn't work anymore and I'm not exactly sure how to fix it. The PHP application includes some .htaccess files and I tried to convert those to Nginx. The first one is in the document root: <IfModule mod_rewrite.c> RewriteEngine on RewriteRule ^$ public/ [L] RewriteRule (.*) public/$1 [L] </IfModule> The second one is in /public/ <IfModule mod_rewrite.c RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d # Rewrite all other URLs to index.php/URL RewriteRule ^(.*)$ index.php?url=$1 [PT,L] </IfModule> <IfModule !mod_rewrite.c> ErrorDocument 404 index.php </IfModule> The third and last one is: deny from all My nginx version of it looks like the following: #user nobody; worker_processes 1; #pid logs/nginx.pid; events { worker_connections 1024; } http { include mime.types; default_type application/octet-stream; sendfile on; #tcp_nopush on; keepalive_timeout 65; gzip on; server { listen 8080; server_name localhost; root /Library/WebServer/Documents/admin; location / { index index.php; rewrite ^/$ /public/ break; rewrite ^(.*)$ /public/$1 break; } location /public { if (!-e $request_filename){ rewrite ^(.*)$ /index.php?url=$1 break; } } location /library { deny all; } #error_page 404 /404.html; # redirect server error pages to the static page /50x.html # error_page 500 502 503 504 /50x.html; location = /50x.html { root html; } location ~ \.php$ { root /Library/WebServer/Documents/admin; fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; include fastcgi_params; } } } The problem I face is that something that the routing is broken and just returns a 404 page instead. Hopefully someone has an idea and know how to fix it ;) Thanks EDIT I got it working with this config location /library { deny all; } location ~* ^.+.(jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|doc|xls|exe|pdf|ppt|txt|tar|mid|midi|wav|bmp|rtf|js)$ { access_log off; rewrite ^(.*)$ /public/$1 break; } location / { rewrite ^/(.+)$ /index.php?url=$1 last; } I'm sure there are better solutions and I'm open for suggestions.

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• How secure is a subnet?

  - by HorusKol

  I have an unfortunate complication in my network - some users/computers are attached to a completely private and firewalled office network that we administer (10.n.n.x/24 intranet), but others are attached to a subnet provided by a third party (129.n.n.x/25) as they need to access the internet via the third party's proxy. I have previously set up a gateway/router to allow the 10.n.n.x/24 network internet access: # Allow established connections, and those !not! coming from the public interface # eth0 = public interface # eth1 = private interface iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A INPUT -m state --state NEW ! -i eth0 -j ACCEPT iptables -A FORWARD -i eth0 -o eth1 -m state --state ESTABLISHED,RELATED -j ACCEPT # Allow outgoing connections from the private interface iptables -A FORWARD -i eth1 -o eth0 -j ACCEPT # Masquerade (NAT) iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE # Don't forward any other traffic from the public to the private iptables -A FORWARD -i eth0 -o eth1 -j REJECT However, I now need to enable access to users on our 129.n.n.x/25 subnet to some private servers on the 10.n.n.x/24 network. I figured that I could do something like: # Allow established connections, and those !not! coming from the public interface # eth0 = public interface # eth1 = private interface #1 (10.n.n.x/24) # eth2 = private interface #2 (129.n.n.x/25) iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A INPUT -m state --state NEW ! -i eth0 -j ACCEPT iptables -A FORWARD -i eth0 -o eth1 -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A FORWARD -i eth0 -o eth2 -m state --state ESTABLISHED,RELATED -j ACCEPT # Allow outgoing connections from the private interfaces iptables -A FORWARD -i eth1 -o eth0 -j ACCEPT iptables -A FORWARD -i eth2 -o eth0 -j ACCEPT # Allow the two public connections to talk to each other iptables -A FORWARD -i eth1 -o eth2 -j ACCEPT iptables -A FORWARD -i eth2 -o eth1 -j ACCEPT # Masquerade (NAT) iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE # Don't forward any other traffic from the public to the private iptables -A FORWARD -i eth0 -o eth1 -j REJECT iptables -A FORWARD -i eth0 -o eth2 -j REJECT My concern is that I know that the computers on our 129.n.n.x/25 subnet can be accessed via a VPN through the larger network operated by the provider - therefore, would it be possible for someone on the provider's supernet (correct term? inverse of subnet?) to be able to access our private 10.n.n.x/24 intranet?

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• 256 Windows Azure Worker Roles, Windows Kinect and a 90's Text-Based Ray-Tracer

  - by Alan Smith

  For a couple of years I have been demoing a simple render farm hosted in Windows Azure using worker roles and the Azure Storage service. At the start of the presentation I deploy an Azure application that uses 16 worker roles to render a 1,500 frame 3D ray-traced animation. At the end of the presentation, when the animation was complete, I would play the animation delete the Azure deployment. The standing joke with the audience was that it was that it was a “$2 demo”, as the compute charges for running the 16 instances for an hour was $1.92, factor in the bandwidth charges and it’s a couple of dollars. The point of the demo is that it highlights one of the great benefits of cloud computing, you pay for what you use, and if you need massive compute power for a short period of time using Windows Azure can work out very cost effective. The “$2 demo” was great for presenting at user groups and conferences in that it could be deployed to Azure, used to render an animation, and then removed in a one hour session. I have always had the idea of doing something a bit more impressive with the demo, and scaling it from a “$2 demo” to a “$30 demo”. The challenge was to create a visually appealing animation in high definition format and keep the demo time down to one hour.  This article will take a run through how I achieved this. Ray Tracing Ray tracing, a technique for generating high quality photorealistic images, gained popularity in the 90’s with companies like Pixar creating feature length computer animations, and also the emergence of shareware text-based ray tracers that could run on a home PC. In order to render a ray traced image, the ray of light that would pass from the view point must be tracked until it intersects with an object. At the intersection, the color, reflectiveness, transparency, and refractive index of the object are used to calculate if the ray will be reflected or refracted. Each pixel may require thousands of calculations to determine what color it will be in the rendered image. Pin-Board Toys Having very little artistic talent and a basic understanding of maths I decided to focus on an animation that could be modeled fairly easily and would look visually impressive. I’ve always liked the pin-board desktop toys that become popular in the 80’s and when I was working as a 3D animator back in the 90’s I always had the idea of creating a 3D ray-traced animation of a pin-board, but never found the energy to do it. Even if I had a go at it, the render time to produce an animation that would look respectable on a 486 would have been measured in months. PolyRay Back in 1995 I landed my first real job, after spending three years being a beach-ski-climbing-paragliding-bum, and was employed to create 3D ray-traced animations for a CD-ROM that school kids would use to learn physics. I had got into the strange and wonderful world of text-based ray tracing, and was using a shareware ray-tracer called PolyRay. PolyRay takes a text file describing a scene as input and, after a few hours processing on a 486, produced a high quality ray-traced image. The following is an example of a basic PolyRay scene file. background Midnight_Blue   static define matte surface { ambient 0.1 diffuse 0.7 } define matte_white texture { matte { color white } } define matte_black texture { matte { color dark_slate_gray } } define position_cylindrical 3 define lookup_sawtooth 1 define light_wood <0.6, 0.24, 0.1> define median_wood <0.3, 0.12, 0.03> define dark_wood <0.05, 0.01, 0.005>     define wooden texture { noise surface { ambient 0.2  diffuse 0.7  specular white, 0.5 microfacet Reitz 10 position_fn position_cylindrical position_scale 1  lookup_fn lookup_sawtooth octaves 1 turbulence 1 color_map( [0.0, 0.2, light_wood, light_wood] [0.2, 0.3, light_wood, median_wood] [0.3, 0.4, median_wood, light_wood] [0.4, 0.7, light_wood, light_wood] [0.7, 0.8, light_wood, median_wood] [0.8, 0.9, median_wood, light_wood] [0.9, 1.0, light_wood, dark_wood]) } } define glass texture { surface { ambient 0 diffuse 0 specular 0.2 reflection white, 0.1 transmission white, 1, 1.5 }} define shiny surface { ambient 0.1 diffuse 0.6 specular white, 0.6 microfacet Phong 7  } define steely_blue texture { shiny { color black } } define chrome texture { surface { color white ambient 0.0 diffuse 0.2 specular 0.4 microfacet Phong 10 reflection 0.8 } }   viewpoint {     from <4.000, -1.000, 1.000> at <0.000, 0.000, 0.000> up <0, 1, 0> angle 60     resolution 640, 480 aspect 1.6 image_format 0 }       light <-10, 30, 20> light <-10, 30, -20>   object { disc <0, -2, 0>, <0, 1, 0>, 30 wooden }   object { sphere <0.000, 0.000, 0.000>, 1.00 chrome } object { cylinder <0.000, 0.000, 0.000>, <0.000, 0.000, -4.000>, 0.50 chrome }   After setting up the background and defining colors and textures, the viewpoint is specified. The “camera” is located at a point in 3D space, and it looks towards another point. The angle, image resolution, and aspect ratio are specified. Two lights are present in the image at defined coordinates. The three objects in the image are a wooden disc to represent a table top, and a sphere and cylinder that intersect to form a pin that will be used for the pin board toy in the final animation. When the image is rendered, the following image is produced. The pins are modeled with a chrome surface, so they reflect the environment around them. Note that the scale of the pin shaft is not correct, this will be fixed later. Modeling the Pin Board The frame of the pin-board is made up of three boxes, and six cylinders, the front box is modeled using a clear, slightly reflective solid, with the same refractive index of glass. The other shapes are modeled as metal. object { box <-5.5, -1.5, 1>, <5.5, 5.5, 1.2> glass } object { box <-5.5, -1.5, -0.04>, <5.5, 5.5, -0.09> steely_blue } object { box <-5.5, -1.5, -0.52>, <5.5, 5.5, -0.59> steely_blue } object { cylinder <-5.2, -1.2, 1.4>, <-5.2, -1.2, -0.74>, 0.2 steely_blue } object { cylinder <5.2, -1.2, 1.4>, <5.2, -1.2, -0.74>, 0.2 steely_blue } object { cylinder <-5.2, 5.2, 1.4>, <-5.2, 5.2, -0.74>, 0.2 steely_blue } object { cylinder <5.2, 5.2, 1.4>, <5.2, 5.2, -0.74>, 0.2 steely_blue } object { cylinder <0, -1.2, 1.4>, <0, -1.2, -0.74>, 0.2 steely_blue } object { cylinder <0, 5.2, 1.4>, <0, 5.2, -0.74>, 0.2 steely_blue }   In order to create the matrix of pins that make up the pin board I used a basic console application with a few nested loops to create two intersecting matrixes of pins, which models the layout used in the pin boards. The resulting image is shown below. The pin board contains 11,481 pins, with the scene file containing 23,709 lines of code. For the complete animation 2,000 scene files will be created, which is over 47 million lines of code. Each pin in the pin-board will slide out a specific distance when an object is pressed into the back of the board. This is easily modeled by setting the Z coordinate of the pin to a specific value. In order to set all of the pins in the pin-board to the correct position, a bitmap image can be used. The position of the pin can be set based on the color of the pixel at the appropriate position in the image. When the Windows Azure logo is used to set the Z coordinate of the pins, the following image is generated. The challenge now was to make a cool animation. The Azure Logo is fine, but it is static. Using a normal video to animate the pins would not work; the colors in the video would not be the same as the depth of the objects from the camera. In order to simulate the pin board accurately a series of frames from a depth camera could be used. Windows Kinect The Kenect controllers for the X-Box 360 and Windows feature a depth camera. The Kinect SDK for Windows provides a programming interface for Kenect, providing easy access for .NET developers to the Kinect sensors. The Kinect Explorer provided with the Kinect SDK is a great starting point for exploring Kinect from a developers perspective. Both the X-Box 360 Kinect and the Windows Kinect will work with the Kinect SDK, the Windows Kinect is required for commercial applications, but the X-Box Kinect can be used for hobby projects. The Windows Kinect has the advantage of providing a mode to allow depth capture with objects closer to the camera, which makes for a more accurate depth image for setting the pin positions. Creating a Depth Field Animation The depth field animation used to set the positions of the pin in the pin board was created using a modified version of the Kinect Explorer sample application. In order to simulate the pin board accurately, a small section of the depth range from the depth sensor will be used. Any part of the object in front of the depth range will result in a white pixel; anything behind the depth range will be black. Within the depth range the pixels in the image will be set to RGB values from 0,0,0 to 255,255,255. A screen shot of the modified Kinect Explorer application is shown below. The Kinect Explorer sample application was modified to include slider controls that are used to set the depth range that forms the image from the depth stream. This allows the fine tuning of the depth image that is required for simulating the position of the pins in the pin board. The Kinect Explorer was also modified to record a series of images from the depth camera and save them as a sequence JPEG files that will be used to animate the pins in the animation the Start and Stop buttons are used to start and stop the image recording. En example of one of the depth images is shown below. Once a series of 2,000 depth images has been captured, the task of creating the animation can begin. Rendering a Test Frame In order to test the creation of frames and get an approximation of the time required to render each frame a test frame was rendered on-premise using PolyRay. The output of the rendering process is shown below. The test frame contained 23,629 primitive shapes, most of which are the spheres and cylinders that are used for the 11,800 or so pins in the pin board. The 1280x720 image contains 921,600 pixels, but as anti-aliasing was used the number of rays that were calculated was 4,235,777, with 3,478,754,073 object boundaries checked. The test frame of the pin board with the depth field image applied is shown below. The tracing time for the test frame was 4 minutes 27 seconds, which means rendering the2,000 frames in the animation would take over 148 hours, or a little over 6 days. Although this is much faster that an old 486, waiting almost a week to see the results of an animation would make it challenging for animators to create, view, and refine their animations. It would be much better if the animation could be rendered in less than one hour. Windows Azure Worker Roles The cost of creating an on-premise render farm to render animations increases in proportion to the number of servers. The table below shows the cost of servers for creating a render farm, assuming a cost of $500 per server. Number of Servers Cost 1 $500 16 $8,000 256 $128,000   As well as the cost of the servers, there would be additional costs for networking, racks etc. Hosting an environment of 256 servers on-premise would require a server room with cooling, and some pretty hefty power cabling. The Windows Azure compute services provide worker roles, which are ideal for performing processor intensive compute tasks. With the scalability available in Windows Azure a job that takes 256 hours to complete could be perfumed using different numbers of worker roles. The time and cost of using 1, 16 or 256 worker roles is shown below. Number of Worker Roles Render Time Cost 1 256 hours $30.72 16 16 hours $30.72 256 1 hour $30.72   Using worker roles in Windows Azure provides the same cost for the 256 hour job, irrespective of the number of worker roles used. Provided the compute task can be broken down into many small units, and the worker role compute power can be used effectively, it makes sense to scale the application so that the task is completed quickly, making the results available in a timely fashion. The task of rendering 2,000 frames in an animation is one that can easily be broken down into 2,000 individual pieces, which can be performed by a number of worker roles. Creating a Render Farm in Windows Azure The architecture of the render farm is shown in the following diagram. The render farm is a hybrid application with the following components: ·         On-Premise o   Windows Kinect – Used combined with the Kinect Explorer to create a stream of depth images. o   Animation Creator – This application uses the depth images from the Kinect sensor to create scene description files for PolyRay. These files are then uploaded to the jobs blob container, and job messages added to the jobs queue. o   Process Monitor – This application queries the role instance lifecycle table and displays statistics about the render farm environment and render process. o   Image Downloader – This application polls the image queue and downloads the rendered animation files once they are complete. ·         Windows Azure o   Azure Storage – Queues and blobs are used for the scene description files and completed frames. A table is used to store the statistics about the rendering environment.   The architecture of each worker role is shown below.   The worker role is configured to use local storage, which provides file storage on the worker role instance that can be use by the applications to render the image and transform the format of the image. The service definition for the worker role with the local storage configuration highlighted is shown below. <?xml version="1.0" encoding="utf-8"?> <ServiceDefinition name="CloudRay" >   <WorkerRole name="CloudRayWorkerRole" vmsize="Small">     <Imports>     </Imports>     <ConfigurationSettings>       <Setting name="DataConnectionString" />     </ConfigurationSettings>     <LocalResources>       <LocalStorage name="RayFolder" cleanOnRoleRecycle="true" />     </LocalResources>   </WorkerRole> </ServiceDefinition>     The two executable programs, PolyRay.exe and DTA.exe are included in the Azure project, with Copy Always set as the property. PolyRay will take the scene description file and render it to a Truevision TGA file. As the TGA format has not seen much use since the mid 90’s it is converted to a JPG image using Dave's Targa Animator, another shareware application from the 90’s. Each worker roll will use the following process to render the animation frames. 1.       The worker process polls the job queue, if a job is available the scene description file is downloaded from blob storage to local storage. 2.       PolyRay.exe is started in a process with the appropriate command line arguments to render the image as a TGA file. 3.       DTA.exe is started in a process with the appropriate command line arguments convert the TGA file to a JPG file. 4.       The JPG file is uploaded from local storage to the images blob container. 5.       A message is placed on the images queue to indicate a new image is available for download. 6.       The job message is deleted from the job queue. 7.       The role instance lifecycle table is updated with statistics on the number of frames rendered by the worker role instance, and the CPU time used. The code for this is shown below. public override void Run() {     // Set environment variables     string polyRayPath = Path.Combine(Environment.GetEnvironmentVariable("RoleRoot"), PolyRayLocation);     string dtaPath = Path.Combine(Environment.GetEnvironmentVariable("RoleRoot"), DTALocation);       LocalResource rayStorage = RoleEnvironment.GetLocalResource("RayFolder");     string localStorageRootPath = rayStorage.RootPath;       JobQueue jobQueue = new JobQueue("renderjobs");     JobQueue downloadQueue = new JobQueue("renderimagedownloadjobs");     CloudRayBlob sceneBlob = new CloudRayBlob("scenes");     CloudRayBlob imageBlob = new CloudRayBlob("images");     RoleLifecycleDataSource roleLifecycleDataSource = new RoleLifecycleDataSource();       Frames = 0;       while (true)     {         // Get the render job from the queue         CloudQueueMessage jobMsg = jobQueue.Get();           if (jobMsg != null)         {             // Get the file details             string sceneFile = jobMsg.AsString;             string tgaFile = sceneFile.Replace(".pi", ".tga");             string jpgFile = sceneFile.Replace(".pi", ".jpg");               string sceneFilePath = Path.Combine(localStorageRootPath, sceneFile);             string tgaFilePath = Path.Combine(localStorageRootPath, tgaFile);             string jpgFilePath = Path.Combine(localStorageRootPath, jpgFile);               // Copy the scene file to local storage             sceneBlob.DownloadFile(sceneFilePath);               // Run the ray tracer.             string polyrayArguments =                 string.Format("\"{0}\" -o \"{1}\" -a 2", sceneFilePath, tgaFilePath);             Process polyRayProcess = new Process();             polyRayProcess.StartInfo.FileName =                 Path.Combine(Environment.GetEnvironmentVariable("RoleRoot"), polyRayPath);             polyRayProcess.StartInfo.Arguments = polyrayArguments;             polyRayProcess.Start();             polyRayProcess.WaitForExit();               // Convert the image             string dtaArguments =                 string.Format(" {0} /FJ /P{1}", tgaFilePath, Path.GetDirectoryName (jpgFilePath));             Process dtaProcess = new Process();             dtaProcess.StartInfo.FileName =                 Path.Combine(Environment.GetEnvironmentVariable("RoleRoot"), dtaPath);             dtaProcess.StartInfo.Arguments = dtaArguments;             dtaProcess.Start();             dtaProcess.WaitForExit();               // Upload the image to blob storage             imageBlob.UploadFile(jpgFilePath);               // Add a download job.             downloadQueue.Add(jpgFile);               // Delete the render job message             jobQueue.Delete(jobMsg);               Frames++;         }         else         {             Thread.Sleep(1000);         }           // Log the worker role activity.         roleLifecycleDataSource.Alive             ("CloudRayWorker", RoleLifecycleDataSource.RoleLifecycleId, Frames);     } }     Monitoring Worker Role Instance Lifecycle In order to get more accurate statistics about the lifecycle of the worker role instances used to render the animation data was tracked in an Azure storage table. The following class was used to track the worker role lifecycles in Azure storage.   public class RoleLifecycle : TableServiceEntity {     public string ServerName { get; set; }     public string Status { get; set; }     public DateTime StartTime { get; set; }     public DateTime EndTime { get; set; }     public long SecondsRunning { get; set; }     public DateTime LastActiveTime { get; set; }     public int Frames { get; set; }     public string Comment { get; set; }       public RoleLifecycle()     {     }       public RoleLifecycle(string roleName)     {         PartitionKey = roleName;         RowKey = Utils.GetAscendingRowKey();         Status = "Started";         StartTime = DateTime.UtcNow;         LastActiveTime = StartTime;         EndTime = StartTime;         SecondsRunning = 0;         Frames = 0;     } }     A new instance of this class is created and added to the storage table when the role starts. It is then updated each time the worker renders a frame to record the total number of frames rendered and the total processing time. These statistics are used be the monitoring application to determine the effectiveness of use of resources in the render farm. Rendering the Animation The Azure solution was deployed to Windows Azure with the service configuration set to 16 worker role instances. This allows for the application to be tested in the cloud environment, and the performance of the application determined. When I demo the application at conferences and user groups I often start with 16 instances, and then scale up the application to the full 256 instances. The configuration to run 16 instances is shown below. <?xml version="1.0" encoding="utf-8"?> <ServiceConfiguration serviceName="CloudRay" xmlns="http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceConfiguration" osFamily="1" osVersion="*">   <Role name="CloudRayWorkerRole">     <Instances count="16" />     <ConfigurationSettings>       <Setting name="DataConnectionString"         value="DefaultEndpointsProtocol=https;AccountName=cloudraydata;AccountKey=..." />     </ConfigurationSettings>   </Role> </ServiceConfiguration>     About six minutes after deploying the application the first worker roles become active and start to render the first frames of the animation. The CloudRay Monitor application displays an icon for each worker role instance, with a number indicating the number of frames that the worker role has rendered. The statistics on the left show the number of active worker roles and statistics about the render process. The render time is the time since the first worker role became active; the CPU time is the total amount of processing time used by all worker role instances to render the frames.   Five minutes after the first worker role became active the last of the 16 worker roles activated. By this time the first seven worker roles had each rendered one frame of the animation.   With 16 worker roles u and running it can be seen that one hour and 45 minutes CPU time has been used to render 32 frames with a render time of just under 10 minutes.     At this rate it would take over 10 hours to render the 2,000 frames of the full animation. In order to complete the animation in under an hour more processing power will be required. Scaling the render farm from 16 instances to 256 instances is easy using the new management portal. The slider is set to 256 instances, and the configuration saved. We do not need to re-deploy the application, and the 16 instances that are up and running will not be affected. Alternatively, the configuration file for the Azure service could be modified to specify 256 instances.   <?xml version="1.0" encoding="utf-8"?> <ServiceConfiguration serviceName="CloudRay" xmlns="http://schemas.microsoft.com/ServiceHosting/2008/10/ServiceConfiguration" osFamily="1" osVersion="*">   <Role name="CloudRayWorkerRole">     <Instances count="256" />     <ConfigurationSettings>       <Setting name="DataConnectionString"         value="DefaultEndpointsProtocol=https;AccountName=cloudraydata;AccountKey=..." />     </ConfigurationSettings>   </Role> </ServiceConfiguration>     Six minutes after the new configuration has been applied 75 new worker roles have activated and are processing their first frames.   Five minutes later the full configuration of 256 worker roles is up and running. We can see that the average rate of frame rendering has increased from 3 to 12 frames per minute, and that over 17 hours of CPU time has been utilized in 23 minutes. In this test the time to provision 140 worker roles was about 11 minutes, which works out at about one every five seconds.   We are now half way through the rendering, with 1,000 frames complete. This has utilized just under three days of CPU time in a little over 35 minutes.   The animation is now complete, with 2,000 frames rendered in a little over 52 minutes. The CPU time used by the 256 worker roles is 6 days, 7 hours and 22 minutes with an average frame rate of 38 frames per minute. The rendering of the last 1,000 frames took 16 minutes 27 seconds, which works out at a rendering rate of 60 frames per minute. The frame counts in the server instances indicate that the use of a queue to distribute the workload has been very effective in distributing the load across the 256 worker role instances. The first 16 instances that were deployed first have rendered between 11 and 13 frames each, whilst the 240 instances that were added when the application was scaled have rendered between 6 and 9 frames each.   Completed Animation I’ve uploaded the completed animation to YouTube, a low resolution preview is shown below. Pin Board Animation Created using Windows Kinect and 256 Windows Azure Worker Roles   The animation can be viewed in 1280x720 resolution at the following link: http://www.youtube.com/watch?v=n5jy6bvSxWc Effective Use of Resources According to the CloudRay monitor statistics the animation took 6 days, 7 hours and 22 minutes CPU to render, this works out at 152 hours of compute time, rounded up to the nearest hour. As the usage for the worker role instances are billed for the full hour, it may have been possible to render the animation using fewer than 256 worker roles. When deciding the optimal usage of resources, the time required to provision and start the worker roles must also be considered. In the demo I started with 16 worker roles, and then scaled the application to 256 worker roles. It would have been more optimal to start the application with maybe 200 worker roles, and utilized the full hour that I was being billed for. This would, however, have prevented showing the ease of scalability of the application. The new management portal displays the CPU usage across the worker roles in the deployment. The average CPU usage across all instances is 93.27%, with over 99% used when all the instances are up and running. This shows that the worker role resources are being used very effectively. Grid Computing Scenarios Although I am using this scenario for a hobby project, there are many scenarios where a large amount of compute power is required for a short period of time. Windows Azure provides a great platform for developing these types of grid computing applications, and can work out very cost effective. ·         Windows Azure can provide massive compute power, on demand, in a matter of minutes. ·         The use of queues to manage the load balancing of jobs between role instances is a simple and effective solution. ·         Using a cloud-computing platform like Windows Azure allows proof-of-concept scenarios to be tested and evaluated on a very low budget. ·         No charges for inbound data transfer makes the uploading of large data sets to Windows Azure Storage services cost effective. (Transaction charges still apply.) Tips for using Windows Azure for Grid Computing Scenarios I found the implementation of a render farm using Windows Azure a fairly simple scenario to implement. I was impressed by ease of scalability that Azure provides, and by the short time that the application took to scale from 16 to 256 worker role instances. In this case it was around 13 minutes, in other tests it took between 10 and 20 minutes. The following tips may be useful when implementing a grid computing project in Windows Azure. ·         Using an Azure Storage queue to load-balance the units of work across multiple worker roles is simple and very effective. The design I have used in this scenario could easily scale to many thousands of worker role instances. ·         Windows Azure accounts are typically limited to 20 cores. If you need to use more than this, a call to support and a credit card check will be required. ·         Be aware of how the billing model works. You will be charged for worker role instances for the full clock our in which the instance is deployed. Schedule the workload to start just after the clock hour has started. ·         Monitor the utilization of the resources you are provisioning, ensure that you are not paying for worker roles that are idle. ·         If you are deploying third party applications to worker roles, you may well run into licensing issues. Purchasing software licenses on a per-processor basis when using hundreds of processors for a short time period would not be cost effective. ·         Third party software may also require installation onto the worker roles, which can be accomplished using start-up tasks. Bear in mind that adding a startup task and possible re-boot will add to the time required for the worker role instance to start and activate. An alternative may be to use a prepared VM and use VM roles. ·         Consider using the Windows Azure Autoscaling Application Block (WASABi) to autoscale the worker roles in your application. When using a large number of worker roles, the utilization must be carefully monitored, if the scaling algorithms are not optimal it could get very expensive!

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• Boot log from remotely managed/hacked iPhone for analysis

  - by user1319903

  in reference to my other post. syslog captured immediately after a hard reset for analysis of foul play. Apr 8, 2012 10:08:36 PM - dataaccessd [53] (Notice): 137860|CoreDAV|Warn |Account "iCloud" couldn't reach the server at p03-contacts.icloud.com: Error Domain=NSURLErrorDomain Code=-1009 "The Internet connection appears to be offline." UserInfo=0xde63920 {NSErrorFailingURLStringKey=https://%[email protected]/159665024/principal/, NSErrorFailingURLKey=https://%[email protected]/ /principal/, NSLocalizedDescription=The Internet connection appears to be offline., NSUnderlyingError=0xde7dc00 "The Internet connection appears to be offline."} Apr 8, 2012 10:08:36 PM - UserEventAgent [12] (Warning): TRACE: connection interrupted Apr 8, 2012 10:08:36 PM - UserEventAgent [12] (Warning): DEBUG: disconnected Apr 8, 2012 10:08:36 PM - UserEventAgent [12] (Warning): TRACE: Canceling Apr 8, 2012 10:08:36 PM - UserEventAgent [12] (Warning): TRACE: connection invalid Apr 8, 2012 10:08:35 PM - kernel [0] (Debug): launchd[82] Builtin profile: container (sandbox) Apr 8, 2012 10:08:35 PM - kernel [0] (Debug): launchd[82] Container: /private/var/mobile/Applications/048D35CA-6427-4EC8-8B76-A194697A7CE9 [69] (sandbox) Apr 8, 2012 10:08:35 PM - wifid [29] (Error): WiFi:[355640915.904103]: Client dataaccessd set type to background application Apr 8, 2012 10:08:35 PM - dataaccessd [53] (Notice): 137860|DA|Warn |Delegate 5ADDBE3B-D5FD-43E1-87D4-C1153733EFAB finished a refresh but it is not registered with the refresh manager Apr 8, 2012 10:08:34 PM - timed [31] (Notice): (Note ) CoreTime: Not setting system time to 04/09/2012 05:08:34 from GPS because time is unchanged Apr 8, 2012 10:08:34 PM - timed [31] (Notice): (Note ) CoreTime: Not setting time zone to America/Los_Angeles from NITZ Apr 8, 2012 10:08:33 PM - kernel [0] (Debug): AppleKeyStore:cp_key_store_action(1) Apr 8, 2012 10:08:33 PM - kernel [0] (Debug): AppleKeyStore:Sending lock change Apr 8, 2012 10:08:32 PM - profiled [20] (Notice): (Note ) profiled: Device unlock notification received Apr 8, 2012 10:08:31 PM - softwareupdated [37] (Notice): 3e828d98 : Cleaning up unused prepared updates Apr 8, 2012 10:08:27 PM - mstreamd [43] (Warning): PSDLog: Can't return photoStreamsPublishStreamID because no Apple Account has Photo Streams enabled Apr 8, 2012 10:08:27 PM - mstreamd [43] (Notice): (Note ) mstreamd: Not listening to push notifications. Apr 8, 2012 10:08:27 PM - mstreamd [43] (Warning): PSDLog: Can't return photoStreamsPublishStreamID because no Apple Account has Photo Streams enabled Apr 8, 2012 10:08:27 PM - mstreamd [43] (Notice): (Note ) mstreamd: Not listening to push notifications. Apr 8, 2012 10:08:27 PM - mstreamd [43] (Notice): (Note ) mstreamd: Retrieved push tokens. Dev: 0, Prod: 0 Apr 8, 2012 10:08:27 PM - mstreamd [43] (Notice): (Note ) mstreamd: Media stream daemon starting... Apr 8, 2012 10:08:26 PM - SpringBoard [15] (Notice): SMSCTServer is available and ready to rock. Apr 8, 2012 10:08:26 PM - SpringBoard [15] (Error): mms: * isMmsConfigured = 1 Apr 8, 2012 10:08:26 PM - MobilePhone [79] (Warning): Connection lost, retrying with key exchange. Apr 8, 2012 10:08:26 PM - MobilePhone [79] (Warning): Connection lost, retrying with key exchange. Apr 8, 2012 10:08:26 PM - MobilePhone [79] (Warning): Connection lost, retrying with key exchange. Apr 8, 2012 10:08:26 PM - MobilePhone [79] (Warning): Connection lost, retrying with key exchange. Apr 8, 2012 10:08:25 PM - SpringBoard [15] (Warning): BT: failed to get connectable state with error 111 Apr 8, 2012 10:08:25 PM - SpringBoard [15] (Error): WiFi: Consulting "no-sdio-devices" property. Apr 8, 2012 10:08:25 PM - SpringBoard [15] (Error): WiFi: "no-sdio-devices" property not found. Apr 8, 2012 10:08:25 PM - SpringBoard [15] (Warning): SMS Plugin initialized. Apr 8, 2012 10:08:25 PM - SpringBoard [15] (Warning): Telephony plugin initialized Apr 8, 2012 10:08:25 PM - SpringBoard [15] (Warning): SIMToolkit plugin for SpringBoard initialized. Apr 8, 2012 10:08:25 PM - SpringBoard [15] (Error): WiFi: Consulting "no-sdio-devices" property. Apr 8, 2012 10:08:25 PM - SpringBoard [15] (Error): WiFi: "no-sdio-devices" property not found. Apr 8, 2012 10:08:25 PM - SpringBoard [15] (Warning): WiFi picker plugin initialized Apr 8, 2012 10:08:25 PM - SpringBoard [15] (Warning): EKAlarmEngine: Region monitoring not available or enabled. Trigger ignored! Apr 8, 2012 10:08:24 PM - kernel [0] (Debug): AppleH4CamIn::setPowerStateGated: 0 Apr 8, 2012 10:08:24 PM - kernel [0] (Debug): AppleH4CamIn::power_off_hardware Apr 8, 2012 10:08:24 PM - SpringBoard [15] (Notice): IOMobileFrameBufferGetMirroringCapability returning -536870201 via kIOMFBConnectMethod_GetMirroringCapability  Apr 8, 2012 10:08:24 PM - aggregated [61] (Warning): PLAggregateState Error: Leaving state unplugged_screen_off even though we are not in it, doing nothing Apr 8, 2012 10:08:24 PM - aggregated [61] (Warning): PLAggregateState Error: Entering state unplugged_screen_on even though we are already in it, doing nothing Apr 8, 2012 10:08:24 PM - wifid [29] (Error): WiFi:[355640904.616440]: Disable WoW requested by "spd" Apr 8, 2012 10:08:24 PM - SpringBoard [15] (Warning): Application windows are expected to have a root view controller at the end of application launch Apr 8, 2012 10:08:23 PM - SpringBoard [15] (Warning): BTM: attaching to BTServer Apr 8, 2012 10:08:23 PM - kernel [0] (Debug): AppleH4CamIn::ISP_LoadFirmware_gated: fw len=1232920 Apr 8, 2012 10:08:23 PM - kernel [0] (Debug): AppleH4CamIn::ISP_LoadFirmware_gated - firmware checksum: 0x05935019 Apr 8, 2012 10:08:23 PM - kernel [0] (Debug): AppleH4CamIn::power_on_hardware Apr 8, 2012 10:08:23 PM - kernel [0] (Debug): AppleH4CamIn::ISP_Init - No set-file loaded for camera channel 0 Apr 8, 2012 10:08:23 PM - kernel [0] (Debug): AppleH4CamIn::ISP_Init - No set-file loaded for camera channel 1 Apr 8, 2012 10:08:23 PM - kernel [0] (Debug): AppleH4CamIn::ISP_InitialSensorDetection - found sensor on chan 0: 0x0145 Apr 8, 2012 10:08:23 PM - kernel [0] (Debug): AppleH4CamIn::ISP_InitialSensorDetection - found sensor on chan 1: 0x7736 Apr 8, 2012 10:08:23 PM - kernel [0] (Debug): AppleH4CamIn::power_off_hardware Apr 8, 2012 10:08:23 PM - kernel [0] (Debug): AppleH4CamIn::ISP_LoadSetfile_gated (camChan=0) Apr 8, 2012 10:08:23 PM - kernel [0] (Debug): AppleH4CamIn::ISP_LoadSetfile_gated (camChan=1) Apr 8, 2012 10:08:23 PM - kernel [0] (Debug): AppleH4CamIn::setPowerStateGated: 1 Apr 8, 2012 10:08:23 PM - kernel [0] (Debug): AppleH4CamIn::power_on_hardware Apr 8, 2012 10:08:23 PM - profiled [20] (Notice): (Note ) profiled: Locking device Apr 8, 2012 10:08:22 PM - kernel [0] (Debug): HighlandParkResourceMgr::AddFirmware() {'cdma', '    '} added to resources Apr 8, 2012 10:08:22 PM - kernel [0] (Debug): AppleSynopsysOTGDevice::gated_registerFunction Register function PTP Apr 8, 2012 10:08:22 PM - kernel [0] (Debug): AppleSynopsysOTGDevice::gated_registerFunction all functions registered- we are ready to start usb stack Apr 8, 2012 10:08:22 PM - kernel [0] (Debug): AppleSynopsysOTGDevice::handleUSBCableDisconnect Apr 8, 2012 10:08:22 PM - kernel [0] (Debug): HighlandParkResourceMgr::AddFirmware() {'gsm ', 'nb  '} added to resources Apr 8, 2012 10:08:22 PM - kernel [0] (Debug): HighlandParkResourceMgr::AddFirmware() {'gsm ', 'wb  '} added to resources Apr 8, 2012 10:08:22 PM - MRMLowDiskUEA [12] (Notice): MobileDelete: LowDisk Plugin: start Apr 8, 2012 10:08:22 PM - MRMLowDiskUEA [12] (Notice): kqueue registration successful Apr 8, 2012 10:08:22 PM - mediaserverd [44] (Error): 22:08:22.522867 com.apple.AVConference: /SourceCache/GameKitServices/GameKitServices-344.21/AVConference.subproj/Sources/AVConferenceServer.m:1867: AVConferenceServerStart Apr 8, 2012 10:08:22 PM - CommCenter [18] (Notice): Carrier bundle value for recipient address: 28818773 Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleSynopsysOTGDevice - Configuration: PTP Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleSynopsysOTGDevice          Interface: PTP Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleSynopsysOTGDevice - Configuration: iPod USB Interface Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleSynopsysOTGDevice          Interface: USBAudioControl Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleSynopsysOTGDevice          Interface: USBAudioStreaming Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleSynopsysOTGDevice          Interface: IapOverUsbHid Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleSynopsysOTGDevice - Configuration: PTP + Apple Mobile Device Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleSynopsysOTGDevice          Interface: PTP Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleSynopsysOTGDevice          Interface: AppleUSBMux Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleSynopsysOTGDevice - Configuration: PTP + Apple Mobile Device + Apple USB Ethernet Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleSynopsysOTGDevice          Interface: PTP Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleSynopsysOTGDevice          Interface: AppleUSBMux Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleSynopsysOTGDevice          Interface: AppleUSBEthernet Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): IOAccessoryPortUSB::start Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleSynopsysOTGDevice::gated_registerFunction Register function USBAudioControl Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): virtual bool AppleUSBDeviceMux::start(IOService*) build: Feb  1 2012 23:16:46 Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): init_waste Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleSynopsysOTGDevice::gated_registerFunction Register function AppleUSBMux Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleSynopsysOTGDevice::gated_registerFunction Register function IapOverUsbHid Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleSynopsysOTGDevice::gated_registerFunction Register function USBAudioStreaming Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleSynopsysOTGDevice::gated_registerFunction Register function AppleUSBEthernet Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleUSBEthernetDevice::start: Host MAC address = 02:(this Mac address does not physically exist) -edit Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): AppleUSBEthernetDevice: Ethernet address  Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): BTServer[66] Builtin profile: BlueTool (sandbox) Apr 8, 2012 10:08:21 PM - kernel [0] (Debug): BTServer[66] Builtin profile: BlueTool (sandbox) Apr 8, 2012 10:08:21 PM - hpfd [50] (Notice): firmware resource loaded { 'cdma' '    ' } Apr 8, 2012 10:08:21 PM - wifid [29] (Error): WiFi:[355640901.282776]: Could not read APPLE80211_IOC_SUPPORTED_CHANNELS err=82 Apr 8, 2012 10:08:21 PM - wifid [29] (Error): WiFi:[355640901.312786]: Client itunesstored is background application Apr 8, 2012 10:08:21 PM - timed [31] (Notice): (Note ) CoreTime: Want active time in 38.24hrs. Need active time in 121.57hrs. Apr 8, 2012 10:08:21 PM - SpringBoard [15] (Notice): MultitouchHID: detection mode: 255-0 (deferring until bootloaded) Apr 8, 2012 10:08:21 PM - CLTM [12] (Error): CLTM: resetting temps: now = 1333948101, last update = -2147483648 Apr 8, 2012 10:08:21 PM - locationd [28] (Error): WiFi:[355640901.852993]: WiFiManager now available Apr 8, 2012 10:08:21 PM - OTACrashCopier [62] (Notice): (Warn ) Failed to read attributes from '/var/mobile/Library/OTALogging/.last_successful_submission_marker' Apr 8, 2012 10:08:21 PM - hpfd [50] (Notice): firmware resource loaded { 'gsm ' 'nb  ' } Apr 8, 2012 10:08:21 PM - hpfd [50] (Notice): firmware resource loaded { 'gsm ' 'wb  ' } Apr 8, 2012 10:08:20 PM - kernel [0] (Debug): AppleBCMWLANCore::initFirmware(): successful initialization Apr 8, 2012 10:08:20 PM - kernel [0] (Debug): AppleBCMWLANCore:initFirmware(): 2496 PropTxStatus feature is not enabled for this platform  Apr 8, 2012 10:08:20 PM - kernel [0] (Debug): AppleBCMWLANCore::initDongle():: creating virtual interface with prefix = ap Apr 8, 2012 10:08:20 PM - kernel [0] (Debug): AppleBCMWLANCore::initDongle(): Core Driver Initialization Time 19.38798583 Apr 8, 2012 10:08:20 PM - kernel [0] (Debug): 000019.281423 hsic-baseband::safetyNet: port is not connected Apr 8, 2012 10:08:20 PM - lockdownd [23] (Notice): 3e828d98 _create_cesm_vault: try to create blob Apr 8, 2012 10:08:20 PM - lockdownd [23] (Notice): 3e828d98 load_activation_records: This is the default record Apr 8, 2012 10:08:20 PM - lockdownd [23] (Notice): 3e828d98 _create_cesm_vault: blob written Apr 8, 2012 10:08:20 PM - lockdownd [23] (Notice): 3e828d98 ping_configd: Not setting host name, it already has one: Pete's iPod  Apr 8, 2012 10:08:20 PM - lockdownd [23] (Notice): 3e828d98 lookup_baseband_info_new: radio not ready: kCTPostponementStatusNotReady Apr 8, 2012 10:08:20 PM - lockdownd [23] (Notice): 3e828d98 load_activation_records: This is the default record Apr 8, 2012 10:08:20 PM - SpringBoard [15] (Error): WiFi: Consulting "no-sdio-devices" property. Apr 8, 2012 10:08:20 PM - SpringBoard [15] (Error): WiFi: "no-sdio-devices" property not found. Apr 8, 2012 10:08:20 PM - lockdownd [23] (Notice): 3e828d98 determine_activation_state_new: Original act. state: Activated Apr 8, 2012 10:08:20 PM - lockdownd [23] (Notice): 3e828d98 determine_activation_state_new: radio not ready, don't change activation status, wait for notification, status: kCTPostponementStatusNotReady Apr 8, 2012 10:08:20 PM - lockdownd [23] (Notice): 3e828d98 determine_activation_state_new: Activation state now is Activated Apr 8, 2012 10:08:20 PM - SpringBoard [15] (Warning): lockdown says the device is: [Activated], state is 3 Apr 8, 2012 10:08:20 PM - SpringBoard [15] (Warning): lockdown says we've previously registered: [1], state is 1 Apr 8, 2012 10:08:20 PM - lockdownd [23] (Notice): 3e828d98 notification_worker: now listening for CT notifications Apr 8, 2012 10:08:20 PM - lockdownd [23] (Notice): 3e828d98 notification_worker: we've registered for notifications, now make sure we didn't miss one... Apr 8, 2012 10:08:20 PM - lockdownd [23] (Notice): 3e828d98 load_activation_records: This is the default record Apr 8, 2012 10:08:20 PM - lockdownd [23] (Notice): 3e828d98 determine_activation_state_new: Original act. state: Activated Apr 8, 2012 10:08:20 PM - lockdownd [23] (Notice): 3e828d98 determine_activation_state_new: radio not ready, don't change activation status, wait for notification, status: kCTPostponementStatusNotReady Apr 8, 2012 10:08:20 PM - lockdownd [23] (Notice): 3e828d98 determine_activation_state_new: Activation state now is Activated Apr 8, 2012 10:08:20 PM - SpringBoard [15] (Notice): Posting 'com.apple.iokit.hid.displayStatus' notifyState=1 Apr 8, 2012 10:08:20 PM - SpringBoard [15] (Notice): __IOHIDLoadBundles: Loaded 1 HID plugin Apr 8, 2012 10:08:19 PM - wifiFirmwareLoader [30] (Warning): [    18.778 sec] Downloaded firmware, 192512 bytes Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleKeyStore:cp_key_store_action(0) Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleMultitouchN1SPI: downloaded 128 bytes of prox calibration data ("built-in") Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleMultitouchN1SPI: downloaded 1024 bytes of calibration data ("built-in") Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleBCMWLANCore::attachBusGated(): Bus Driver Initialization Time 18.266927958 Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleBCMWLANCore:attachBusGated(): Starting with MAC Address: 00:f4:b9:2f:d9:8d Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleBCMWLANFirmwareManager::setNVRAMData(): received 778 bytes Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleBCMWLANCore: Ethernet address 00:f4:b9:2f:d9:8d Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): Loading syscfg. Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleMultitouchN1SPI: downloaded 56264 bytes of firmware data ("0x0084.bin") in 152ms. Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleBCMWLANCore::apple80211_ioctl() Driver not yet initialized, cannot process ioctl Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleBCMWLANCore::apple80211_ioctl() Driver not yet initialized, cannot process ioctl Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AirPort: Enabled AppleBCMWLANCore (link 0, sys 0, user 0) Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleBCMWLANCore::apple80211_ioctl() Driver not yet initialized, cannot process ioctl Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleBCMWLANCore::apple80211_ioctl() Driver not yet initialized, cannot process ioctl Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleBCMWLANBusInterfaceHSIC::loadFirmware(): DL Ver: chip 0x4330, chiprev 0x4 Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): BTServer[66] Builtin profile: BlueTool (sandbox) Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): BCMWLAN Firmware Version: wl0: Dec 22 2011 19:03:58 version 5.95.45 Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleBCMWLANCore::initFirmware(): Firmware supports ap mode; enabling apsta feature (currently enabled) Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleBCMWLANCore::initFirmware(): country code set to XX Apr 8, 2012 10:08:19 PM - configd [14] (Notice): network configuration changed. Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleBCMWLANCmdManager::processResponse(): Firmware Error "BCOM Unsupported" on command "WLC_SET_VAR: bus:txglom" (263). Transaction ID 3, length 0 Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleBCMWLANCore::initFirmware(): Glomming not supported on this device: BCOM Unsupported Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleBCMWLANCore::initFirmware: apsta set to 1 Apr 8, 2012 10:08:19 PM - kernel [0] (Debug): AppleBCMWLANCore::handleEventPacket(): WLC_E_FIFO_CREDIT_MAP,length 6 [9 2 5 3 2] Apr 8, 2012 10:08:19 PM - iapd [49] (Error): Timed out trying to acquire capabilities data. Apr 8, 2012 10:08:19 PM - softwareupdated [37] (Notice): 3e828d98 : Cleaning up unused prepared updates Apr 8, 2012 10:08:19 PM - com.apple.misd [63] (Notice): allowing special port forwarding for test fixtures Apr 8, 2012 10:08:19 PM - hpfd [50] (Notice): resource request { 'N94 ', '    ' } Apr 8, 2012 10:08:19 PM - mstreamd [43] (Notice): (Note ) mstreamd: mstreamd starting up. Apr 8, 2012 10:08:18 PM - kernel [0] (Debug): launchd[44] Builtin profile: mediaserverd (sandbox) Apr 8, 2012 10:08:18 PM - kernel [0] (Debug): launchd[49] Builtin profile: iapd (sandbox) Apr 8, 2012 10:08:18 PM - kernel [0] (Debug): launchd[53] Builtin profile: dataaccessd (sandbox) Apr 8, 2012 10:08:18 PM - kernel [0] (Debug): launchd[60] Builtin profile: apsd (sandbox) Apr 8, 2012 10:08:18 PM - kernel [0] (Debug): launchd[66] Builtin profile: BTServer (sandbox) Apr 8, 2012 10:08:18 PM - mDNSResponder [46] (Error): mDNSResponder mDNSResponder-329.10 (Jan 15 2012 19:07:41) starting iOSVers 9 Apr 8, 2012 10:08:18 PM - mDNSResponder [46] (Error): Note: SetDomainSecrets: no keychain support Apr 8, 2012 10:08:18 PM - mDNSResponder [46] (Error): Note: Compiled without SnowLeopard Fine-Grained Power Management support Apr 8, 2012 10:08:18 PM - fseventsd [51] (Critical): event logs in /private/var/.fseventsd out of sync with volume.  destroying old logs. (10083 7 10090) Apr 8, 2012 10:08:18 PM - fseventsd [51] (Critical): log dir: /private/var/.fseventsd getting new uuid: 8778E61A-0283-4067-B7DF-F75D109983D1 Apr 8, 2012 10:08:18 PM - fseventsd [51] (Error): failed to make the directory /.fseventsd (30/Read-only file system) Apr 8, 2012 10:08:18 PM - fseventsd [51] (Critical): could not open < (No such file or directory) Apr 8, 2012 10:08:18 PM - fseventsd [51] (Critical): log dir: /tmp getting new uuid: 3919EB54-A54F-4289-864A-5158A25EF9DA Apr 8, 2012 10:08:18 PM - wifid [29] (Error): WiFi:[355640898.328610]: WiFi Preferences is up to date Apr 8, 2012 10:08:18 PM - mDNSResponder [46] (Error): D2DInitialize succeeded Apr 8, 2012 10:08:18 PM - fairplayd.N94 [52] (Notice): Vroum Apr 8, 2012 10:08:18 PM - wifid [29] (Error): WiFi:[355640898.537219]: WiFiManager starting, version: WiFiManager-260.9 Feb  4 2012 13:25:16 Apr 8, 2012 10:08:18 PM - configd [14] (Error): WiFi:[355640898.539342]: WiFiManager now available Apr 8, 2012 10:08:18 PM - keybagd [39] (Error): 3e828d98 main: System Keybag loaded Apr 8, 2012 10:08:18 PM - wifiFirmwareLoader [30] (Warning): [    18.268 sec] Found AppleBCMWLANBusInterface; downloading FW.. Apr 8, 2012 10:08:18 PM - wifiFirmwareLoader [30] (Warning): Loading "/usr/share/firmware/wifi/4330b2/bcm94330OlympicUNO3.txt", file size = 778 bytes Apr 8, 2012 10:08:18 PM - wifiFirmwareLoader [30] (Warning): [    18.276 sec] Sending NVRAM, 778 bytes Apr 8, 2012 10:08:18 PM - wifiFirmwareLoader [30] (Warning): Loading "/usr/share/firmware/wifi/4330b2/n94.trx", file size = 192512 bytes Apr 8, 2012 10:08:18 PM - wifiFirmwareLoader [30] (Warning): [    18.300 sec] Sending firmware, 192512 bytes Apr 8, 2012 10:08:18 PM - lockdownd [23] (Error): libMobileGestalt copyEthernetMacAddress: got 00:f4:b9:2f:d9:8f from syscfg Apr 8, 2012 10:08:18 PM - mediaserverd [44] (Notice): 2012-04-08 10:08:18.817015 PM [AirTunes] HAL plugin started Apr 8, 2012 10:08:18 PM - lockdownd [23] (Error): libMobileGestalt createCFStringWithCFData: Cannot convert NULL data to string Apr 8, 2012 10:08:18 PM - lockdownd [23] (Error): libMobileGestalt copyBasebandBoardSnum: Could not convert baseband board snum data to string Apr 8, 2012 10:08:18 PM - lockdownd [23] (Error): libMobileGestalt createCFStringWithCFData: Cannot convert NULL data to string Apr 8, 2012 10:08:18 PM - lockdownd [23] (Error): libMobileGestalt copyWirelessBoardSnum: Could not convert wireless board snum data to string Apr 8, 2012 10:08:18 PM - lockdownd [23] (Notice): 3e828d98 lockstart_local: Build= 9B179 Apr 8, 2012 10:08:18 PM - lockdownd [23] (Notice): 3e828d98 _load_product_type: using Raptor Certs Apr 8, 2012 10:08:17 PM - wifiFirmwareLoader [30] (Warning): [    17.590 sec] wlan AppleUSBHSICDevice found Apr 8, 2012 10:08:17 PM - wifiFirmwareLoader [30] (Warning): [    17.590 sec] WLAN Enumeration attempt 0 / 6: Apr 8, 2012 10:08:17 PM - wifiFirmwareLoader [30] (Warning): [    17.591 sec] Waiting for AppleBCMWLANBusInterface to enumerate... Apr 8, 2012 10:08:16 PM - CommCenter [18] (Notice): MMS thread running Apr 8, 2012 10:08:16 PM - CommCenter [18] (Notice): Communications Center Started. Apr 8, 2012 10:08:16 PM - CommCenter [18] (Notice): STOP LOCATION UPDATE Apr 8, 2012 10:08:16 PM - locationd [28] (Error): WiFi:[355640896.704327]: bootstrap_look_up of WiFiManager server failed Apr 8, 2012 10:08:16 PM - locationd [28] (Error): WiFi:[355640896.705542]: bootstrap_look_up of WiFiManager server failed Apr 8, 2012 10:08:16 PM - locationd [28] (Error): WiFi:[355640896.706648]: bootstrap_look_up of WiFiManager server failed Apr 8, 2012 10:08:16 PM - locationd [28] (Error): WiFi:[355640896.707418]: bootstrap_look_up of WiFiManager server failed Apr 8, 2012 10:08:15 PM - kernel [0] (Debug): bool AppleRGBOUT::power_down_hardware(), RGB_CTRL (0x00000000) clk_down_ready is not set after 60 msecs Apr 8, 2012 10:08:14 PM - lockdownd [23] (Notice): 3e828d98 main: Starting Up Apr 8, 2012 10:08:14 PM - kernel [0] (Debug): IOReturn AppleRGBOUT::set_display_device_gated(uint32_t), 1 Apr 8, 2012 10:08:14 PM - kernel [0] (Debug): virtual void AppleRGBOUT::do_power_state_change(): fSoft: 1 fHard: 1 swapBusy: 1  fController: 0 - 1 Apr 8, 2012 10:08:14 PM - kernel [0] (Debug): bool AppleRGBOUT::power_up_hardware() Apr 8, 2012 10:08:14 PM - kernel [0] (Debug): set_crc_notification_state 0 Apr 8, 2012 10:08:14 PM - kernel [0] (Debug): virtual void AppleRGBOUT::do_power_state_change(): fSoft: 0 fHard: 1 swapBusy: 0  fController: 1 - 0 Apr 8, 2012 10:08:14 PM - kernel [0] (Debug): bool AppleRGBOUT::power_down_hardware() Apr 8, 2012 10:08:14 PM - kernel [0] (Debug): IOReturn IOMobileFramebufferUserClient::set_hotplug_notify(void *, void *) 0x314b3f0d 0xe215600 Apr 8, 2012 10:08:14 PM - kernel [0] (Debug): IOReturn IOMobileFramebufferUserClient::set_hotplug_notify(void *, void *) 0x849d5000 0x876e8828 0x314b3f0d 0xe215600 Apr 8, 2012 10:08:14 PM - kernel [0] (Debug): bool AppleRGBOUT::power_down_hardware(), clock down RGBOUT Apr 8, 2012 10:08:14 PM - SpringBoard [15] (Notice): IOMobileFrameBufferGetMirroringCapability returning -536870201 via kIOMFBConnectMethod_GetMirroringCapability  Apr 8, 2012 10:08:14 PM - backupd [21] (Warning): INFO: Account changed (enabled=0, accountID=159665024) Apr 8, 2012 10:08:13 PM - kernel [0] (Debug): launchd[17] Builtin profile: ptpd (sandbox) Apr 8, 2012 10:08:13 PM - UserEventAgent [12] (Warning): Factory called Apr 8, 2012 10:08:13 PM - configd [14] (Error): WiFi:[355640893.157493]: bootstrap_look_up of WiFiManager server failed Apr 8, 2012 10:08:13 PM - configd [14] (Error): WiFi:[355640893.158197]: bootstrap_look_up of WiFiManager server failed Apr 8, 2012 10:08:13 PM - configd [14] (Error): WiFi:[355640893.158878]: bootstrap_look_up of WiFiManager server failed Apr 8, 2012 10:08:13 PM - UserEventAgent [12] (Notice): (Note ) PIH: MCUEAPlugin initialized. Apr 8, 2012 10:08:13 PM - UserEventAgent [12] (Error): Querying interface Apr 8, 2012 10:08:13 PM - configd [14] (Error): ioctl(SIOCGIFCAP) failed: Device not configured Apr 8, 2012 10:08:13 PM - configd [14] (Error): ioctl(SIOCGIFCAP) failed: Device not configured Apr 8, 2012 10:08:13 PM - configd [14] (Notice): setting hostname to "Petes-iPod" Apr 8, 2012 10:08:13 PM - configd [14] (Notice): network configuration changed. Apr 8, 2012 10:08:13 PM - UserEventAgent [12] (Warning): TRACE: sending {    command = kMBMessageAccountChanged; } Apr 8, 2012 10:08:13 PM - profiled [20] (Notice): (Note ) profiled: Service starting... Apr 8, 2012 10:08:13 PM - profiled [20] (Notice): (Note ) profiled: Performing boot time checks. Apr 8, 2012 10:08:13 PM - profiled [20] (Notice): (Note ) MC: Checking for MDM installation... Apr 8, 2012 10:08:13 PM - profiled [20] (Notice): (Note ) MC: ...finished checking for MDM installation. Apr 8, 2012 10:08:13 PM - profiled [20] (Notice): (Note ) profiled: Checking for new carrier profile... Apr 8, 2012 10:08:13 PM - profiled [20] (Notice): (Note ) profiled: Installing new carrier profile. Apr 8, 2012 10:08:13 PM - profiled [20] (Notice): (Note ) profiled: Carrier profile has already been installed. Apr 8, 2012 10:08:12 PM - com.apple.launchd [1] (Warning): (com.apple.ptpd) The exception server is already claimed! Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: mitigation behavior enabled Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: camera equations enabled Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: thermal monitoring enabled Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: registered for wake notification Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: set decay on sensor 0 to 16384 Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: set decay on sensor 1 to 546 Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: set decay on sensor 2 to 5461 Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: set decay on sensor 3 to 6553 Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: set decay on sensor 4 to 5461 Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: set decay on sensor 5 to 5461 Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: set decay on sensor 6 to 16384 Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: set decay on sensor 9 to 5461 Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: set decay on sensor 10 to 5461 Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: Set AppleARMPerformanceControllerDVDFactor1 dithering level to 101% Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: Set AppleARMPerformanceControllerDVDFactor0 dithering level to 100% Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: Set charge rate index to 0 Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: HID not ready cannot set BL Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: setting thermal status level to 0 (0) [-32768, -32768, -32768, -32768, -32768, -32768, -32768, -32768, -32768, -32768, -32768, -32768, -32768, -32768, -32768] Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: set allowable transmit power limit to 24.000 dBm [-32768, -32768, -32768, -32768, -32768, -32768, -32768, -32768, -32768, -32768, -32768, -32768, -32768, -32768, -32768] Apr 8, 2012 10:08:12 PM - CLTM [12] (Error): CLTM: Could not close relay file Apr 8, 2012 10:08:12 PM - CLTM [12] (Notice): CLTM: thermtgraphrelay is not present

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• IPv6: Should I have private addresses?

  - by AlReece45

  Right now, we have a rack of servers. Every server right now has at least 2 IP addresses, one for the public interface, another for the private. The servers that have SSL websites on them have more IP addresses. We also have virtual servers, that are configured similarly. Private Network The private range is currently just used for backups and monitoring. Its a gigabit port, the interface usage does not usually get very high. There are other technologies we're considering using that would use this port: iSCSI (implementations usually recommends dedicating an interface to it, which would be yet another IP network), VPN to get access to the private range (something I'd rather avoid) dedicated database servers LDAP centralized configuration (like puppet) centralized logging We don't have any private addresses in our DNS records (only public addresses). For our servers to utilize the correct IP address for the right interface (and not hard code the IP address) probably requires setting up a private DNS server (So now we add 2 different dns entries to 2 different systems). Public Network Our public range has a variety of services include web, email, and ftp. There is a hardware firewall between our network and the "public" network. We have (relatively secure) method to instruct the firewall to open and close administrative access (web interfaces, ssh, etc) for our current IP address. With either solution discussed, the host-based firewalls will be configured as well. The public network currently runs at a dedicated 20Mbps link. There are a couple of legacy servers with fast-ethernet ports, but they are scheduled for decommissioning. All of the other production boxes have at least 2 Gigabit Ethernet ports. The more traffic-heavy servers have 4-6 available (none is using more than the 2 Gigabit ports right now). IPv6 I want to get an IPv6 prefix from our ISP. So at least every "server" has at least one IPv6 interface. We'll still need to keep the IPv4 addressees up and available for legacy clients (web servers and email at the very least). We have two IP networks right now. Adding the public IPv6 address would make it three. Just use IPv6? I'm thinking about just dumping the private IPv4 range and using the IPv6 range as the primary means of all communications. If an interface starts reaching its capacity, utilize the newly free interfaces to create a trunk. It has the advantage that if either the public or private traffic needs to exceed 1Gbps. The traffic for each interface is already analyzed on a regular basis to predict future bandwidth use. In the rare instances where bandwidth unexpected peaks: utilize QoS to ensure traffic (like our limited SSH access) is prioritized correctly so the problem can be corrected (if possible, our WAN is the bottleneck right now). It also has the advantage of not needing to make an entry for every private address. We may have private DNS (or just LDAP), but it'll be much more limited in scope with less entries to duplicate. Summary I'm trying to make this network as "simple" as possible. At the same time, I want to make sure its reliable, upgradeable, scalable, and (eventually) redundant. Having one IPv6 network, and a legacy IPv4 network seems to be the best solution to me. Regarding using assigned IPv6 addresses for both networks, sharing the available bandwidth on one (more trunked if needed): Are there any technical disadvantages (limitations, buffers, scalability)? Are there any other security considerations (asides from firewalls mentioned above) to consider? Are there regulations or other security requirements (like PCI-DSS) that this doesn't meet? Is there typical software for setting up a Linux network that doesn't have IPv6 support yet? (logging, ldap, puppet) Some other thing I didn't consider?

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• Original object is also changed when values of cloned object are changed.

  - by fari

  I am trying to use clone but the original object is also changed when values of cloned object are changed. As you can see KalaGameState does not use any objects so a shallow copy should work. /** * This class represents the current state of a Kala game, including * which player's turn it is along with the state of the board; i.e. the * numbers of stones in each side pit, and each player's 'kala'). */ public class KalaGameState implements Cloneable { // your code goes here private int turn; private int[] sidePit; private boolean game; public Object clone() { try { return super.clone(); } catch (CloneNotSupportedException e) { // This should never happen throw new InternalError(e.toString()); } } /** * Constructs a new GameState with a specified number of stones in each * player's side pits. * @param startingStones the number of starting stones in each side pit. * @throws InvalidStartingStonesException if startingStones not in the range 1-10. */ public KalaGameState(int startingStones) throws InvalidStartingStonesException { game=true; turn=0; sidePit=new int[14]; for (int i=0; i <= 13 ; i++) { sidePit[i] = startingStones; } sidePit[6] =0; sidePit[13] =0; // your code goes here } /** * Returns the ID of the player whose turn it is. * @return A value of 0 = Player A, 1 = Player B. */ public int getTurn() { return turn; // your code goes here } /** * Returns the current kala for a specified player. * @param playerNum A value of 0 for Player A, 1 for Player B. * @throws IllegalPlayerNumException if the playerNum parameter * is not 0 or 1. */ public int getKala(int playerNum) throws IllegalPlayerNumException { if(playerNum!=0 || playerNum!=1) throw new IllegalPlayerNumException(playerNum); if(playerNum==0) return sidePit[6]; else return sidePit[13]; // your code goes here } /** * Returns the current number of stones in the specified pit for * the player whose turn it is. * @param sidePitNum the side pit being queried in the range 1-6. * @throws IllegalSidePitNumException if the sidePitNum parameter. * is not in the range 1-6. */ public int getNumStones(int sidePitNum) throws IllegalSidePitNumException { if(turn==0) { if(sidePitNum>6 ) throw new IllegalSidePitNumException(sidePitNum); } else if(sidePitNum>12) throw new IllegalSidePitNumException(sidePitNum); if(turn==0) return sidePit[sidePitNum]; else return sidePit[sidePitNum+6]; // your code goes here } /** * Returns the current number of stones in the specified pit for a specified player. * @param playerNum the player whose kala is sought. (0 = Player A, 1 = Player B). * @param sidePitNum the side pit being queried (in the range 1-6). * @throws IllegalPlayerNumException if the playerNum parameter is not 0 or 1. * @throws IllegalSidePitNumException if the sidePitNum parameter is not in the * range 1-6. */ public int getNumStones(int playerNum, int sidePitNum) throws IllegalPlayerNumException, IllegalSidePitNumException { /*if(playerNum>2) throw new IllegalPlayerNumException(playerNum); if(turn==0) { if(sidePitNum>6 ) throw new IllegalSidePitNumException(sidePitNum); } else if(sidePitNum>12) throw new IllegalSidePitNumException(sidePitNum); */ if(playerNum==0) return sidePit[sidePitNum]; else if(playerNum==1) return sidePit[sidePitNum+7]; else return sidePit[sidePitNum]; } /** * Returns the current score for a specified player - the player's * kala plus the number of stones in each of their side pits. * @param playerNum the player whose kala is sought. (0 = Player A, 1 = Player B). * @throws IllegalPlayerNumException if the playerNum parameter is not 0 or 1. */ public int getScore(int playerNum) throws IllegalPlayerNumException { if(playerNum>1) throw new IllegalPlayerNumException(playerNum); int score=0; if(playerNum==0) { for(int i=0;i<=5;i++) score=score+sidePit[i]; score=score+sidePit[6]; } else { for(int i=7;i<=12;i++) score=score+sidePit[i]; score=score+sidePit[13]; } // your code goes here return score; } private int getSidePitArrayIndex(int sidePitNum) throws IllegalSidePitNumException { if(turn==0) { if(sidePitNum>6 ) throw new IllegalSidePitNumException(sidePitNum); } else if(sidePitNum>12) throw new IllegalSidePitNumException(sidePitNum); if(turn==0) { return sidePitNum--; } else { return sidePitNum+6; } } public boolean gameOver() { int stone=0; if(turn==0) for(int i=0;i<=5;i++) stone=stone+getNumStones(i); else for(int i=7;i<=12;i++) stone=stone+getNumStones(i-7); if (stone==0) game=false; return game; } /** * Makes a move for the player whose turn it is. * @param sidePitNum the side pit being queried (should be in the range 1-6) * @throws IllegalSidePitNumException if the sidePitNum parameter is not in the range 1-6. * @throws IllegalMoveException if the side pit is empty and has no stones in it. */ public void makeMove(int sidePitNum) throws IllegalSidePitNumException, IllegalMoveException { if(turn==0) { if(sidePitNum>6 ) throw new IllegalSidePitNumException(sidePitNum); } else if(sidePitNum>12) throw new IllegalSidePitNumException(sidePitNum); /* if(turn==0) { if(sidePit[sidePitNum-1]==0) throw new IllegalMoveException(sidePitNum); } else { if(sidePit[sidePitNum-1+7]==0) throw new IllegalMoveException(sidePitNum); } */ sidePitNum--; int temp=sidePitNum; int pitNum=sidePitNum+1; int stones=getNumStones(turn,sidePitNum); if(turn==0) sidePit[sidePitNum]=0; else { sidePitNum=sidePitNum+7; sidePit[sidePitNum]=0; pitNum=pitNum+7; } while(stones!=0) { if(turn==0) { sidePit[pitNum]=sidePit[pitNum]+1; stones--; pitNum++; if(pitNum==13) pitNum=0; } else { sidePit[pitNum]=sidePit[pitNum]+1; stones--; pitNum++; if(pitNum==6) pitNum=7; else if(pitNum==14) pitNum=0; } } boolean res=anotherTurn(pitNum); if(!res){ capture(pitNum,temp); if(turn==0) turn=1; else turn=0;} } private boolean anotherTurn(int pitNum) {pitNum--; boolean temp=false; if(turn==0) {if(pitNum==6) {turn=0; temp=true; } } else if(pitNum==-1) {turn=1; temp=true; } return temp; } private void capture(int pitNum, int pit) { pitNum--; if(turn==0){ if(sidePit[pitNum]==1 && pitNum<6) { if(pitNum==0) { sidePit[6]=sidePit[6]+sidePit[12]+1; sidePit[12]=0; } else if(pitNum==1) { sidePit[6]=sidePit[6]+sidePit[11]+1; sidePit[11]=0; } else if(pitNum==2) { sidePit[6]=sidePit[6]+sidePit[10]+1; sidePit[10]=0; } else if(pitNum==3) { sidePit[6]=sidePit[6]+sidePit[9]+1; sidePit[9]=0; } else if(pitNum==4) { sidePit[6]=sidePit[6]+sidePit[8]+1; sidePit[8]=0; } else if(pitNum==5) { sidePit[6]=sidePit[6]+sidePit[7]+1; sidePit[7]=0; } sidePit[pitNum]=0; } } if(turn==1) { //pitNum=pitNum; if(sidePit[pitNum]==1 && pit+7>6) { if(pitNum==7) { sidePit[13]=sidePit[13]+sidePit[5]+1; sidePit[7]=0; } else if(pitNum==8) { sidePit[13]=sidePit[13]+sidePit[4]+1; sidePit[4]=0; } else if(pitNum==9) { sidePit[13]=sidePit[13]+sidePit[3]+1; sidePit[3]=0; } else if(pitNum==10) { sidePit[13]=sidePit[13]+sidePit[2]+1; sidePit[2]=0; } else if(pitNum==11) { sidePit[13]=sidePit[13]+sidePit[1]+1; sidePit[1]=0; } else if(pitNum==12) { sidePit[13]=sidePit[13]+sidePit[0]+1; sidePit[0]=0; } sidePit[pitNum]=0; } } } } import java.io.BufferedReader; import java.io.InputStreamReader; public class RandomPlayer extends KalaPlayer{ //KalaGameState state; public int chooseMove(KalaGameState gs) throws NoMoveAvailableException {int[] moves; moves=getMoves(gs); try{ for(int i=0;i<=5;i++) System.out.println(moves[i]); for(int i=0;i<=5;i++) { if(moves[i]==1) { KalaGameState state=(KalaGameState) gs.clone(); state.makeMove(moves[i]); gs.getTurn(); moves[i]=evalValue(state.getScore(0),state.getScore(1)); } } } catch(IllegalMoveException e) { System.out.println(e); //chooseMove(state); } return 10; } private int evalValue(int score0,int score1) { int score=0; //int score0=0; // int score1=0; //getScore(0); //score1=state.getScore(1); //if((state.getTurn())==0) score=score1-score0; //else //score=score1-score0; System.out.println("score: "+score); return score; } public int[] getMoves(KalaGameState gs) { int[] moves=new int[6]; for(int i=1;i<=6;i++) { if(gs.getNumStones(i)!=0) moves[i-1]=1; else moves[i-1]=0; } return moves; } } Can you explain what is going wrong, please?

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• changing value of a textview while change in other textview by multiplying

  - by sur007

  Here I am getting parsed data from a URL and now I am trying to change the value of parse data to users only dynamically on an text view and my code is package com.mokshya.jsontutorial; import java.text.DecimalFormat; import java.util.ArrayList; import java.util.HashMap; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.NodeList; import com.mokshya.jsontutorialhos.xmltest.R; import android.app.AlertDialog; import android.app.ListActivity; import android.content.DialogInterface; import android.content.Intent; import android.os.Bundle; import android.text.Editable; import android.text.TextWatcher; import android.util.Log; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.EditText; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.SimpleAdapter; import android.widget.TextView; import android.widget.Toast; public class Main extends ListActivity { EditText resultTxt; public double C_webuserDouble; public double C_cashDouble; public double C_transferDouble; public double S_webuserDouble; public double S_cashDouble; public double S_transferDouble; TextView cashTxtView; TextView webuserTxtView; TextView transferTxtView; TextView S_cashTxtView; TextView S_webuserTxtView; TextView S_transferTxtView; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.listplaceholder); cashTxtView = (TextView) findViewById(R.id.cashTxtView); webuserTxtView = (TextView) findViewById(R.id.webuserTxtView); transferTxtView = (TextView) findViewById(R.id.transferTxtView); S_cashTxtView = (TextView) findViewById(R.id.S_cashTxtView); S_webuserTxtView = (TextView) findViewById(R.id.S_webuserTxtView); S_transferTxtView = (TextView) findViewById(R.id.S_transferTxtView); ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>(); JSONObject json = JSONfunctions .getJSONfromURL("http://ldsclient.com/ftp/strtojson.php"); try { JSONArray netfoxlimited = json.getJSONArray("netfoxlimited"); for (inti = 0; i < netfoxlimited.length(); i++) { HashMap<String, String> map = new HashMap<String, String>(); JSONObject e = netfoxlimited.getJSONObject(i); map.put("date", e.getString("date")); map.put("c_web", e.getString("c_web")); map.put("c_bank", e.getString("c_bank")); map.put("c_cash", e.getString("c_cash")); map.put("s_web", e.getString("s_web")); map.put("s_bank", e.getString("s_bank")); map.put("s_cash", e.getString("s_cash")); mylist.add(map); } } catch (JSONException e) { Log.e("log_tag", "Error parsing data " + e.toString()); } ListAdapter adapter = new SimpleAdapter(this, mylist, R.layout.main, new String[] { "date", "c_web", "c_bank", "c_cash", "s_web", "s_bank", "s_cash", }, new int[] { R.id.item_title, R.id.webuserTxtView, R.id.transferTxtView, R.id.cashTxtView, R.id.S_webuserTxtView, R.id.S_transferTxtView, R.id.S_cashTxtView }); setListAdapter(adapter); final ListView lv = getListView(); lv.setTextFilterEnabled(true); lv.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> parent, View view, int position, long id) { @SuppressWarnings("unchecked") HashMap<String, String> o = (HashMap<String, String>) lv .getItemAtPosition(position); Toast.makeText(Main.this, "ID '" + o.get("id") + "' was clicked.", Toast.LENGTH_SHORT).show(); } }); resultTxt = (EditText) findViewById(R.id.editText1); resultTxt.setOnClickListener(new View.OnClickListener() { public void onClick(View arg0) { // TODO Auto-generated method stub resultTxt.setText(""); } }); resultTxt.addTextChangedListener(new TextWatcher() { public void afterTextChanged(Editable arg0) { // TODO Auto-generated method stub String text; text = resultTxt.getText().toString(); if (resultTxt.getText().length() > 5) { calculateSum(C_webuserDouble, C_cashDouble, C_transferDouble); calculateSunrise(S_webuserDouble, S_cashDouble, S_transferDouble); } else { } } public void beforeTextChanged(CharSequence s, int start, int count, int after) { // TODO Auto-generated method stub } public void onTextChanged(CharSequence s, int start, int before, int count) { // TODO Auto-generated method stub } }); } private void calculateSum(Double webuserDouble, Double cashDouble, Double transferDouble) { String Qty; Qty = resultTxt.getText().toString(); if (Qty.length() > 0) { double QtyValue = Double.parseDouble(Qty); double cashResult; double webuserResult; double transferResult; cashResult = cashDouble * QtyValue; webuserResult = webuserDouble * QtyValue; transferResult = transferDouble * QtyValue; DecimalFormat df = new DecimalFormat("#.##"); String cashResultStr = df.format(cashResult); String webuserResultStr = df.format(webuserResult); String transferResultStr = df.format(transferResult); cashTxtView.setText(String.valueOf(cashResultStr)); webuserTxtView.setText(String.valueOf(webuserResultStr)); transferTxtView.setText(String.valueOf(transferResultStr)); // cashTxtView.setFilters(new InputFilter[] {new // DecimalDigitsInputFilter(2)}); } if (Qty.length() == 0) { cashTxtView.setText(String.valueOf(cashDouble)); webuserTxtView.setText(String.valueOf(webuserDouble)); transferTxtView.setText(String.valueOf(transferDouble)); } } private void calculateSunrise(Double webuserDouble, Double cashDouble, Double transferDouble) { String Qty; Qty = resultTxt.getText().toString(); if (Qty.length() > 0) { double QtyValue = Double.parseDouble(Qty); double cashResult; double webuserResult; double transferResult; cashResult = cashDouble * QtyValue; webuserResult = webuserDouble * QtyValue; transferResult = transferDouble * QtyValue; DecimalFormat df = new DecimalFormat("#.##"); String cashResultStr = df.format(cashResult); String webuserResultStr = df.format(webuserResult); String transferResultStr = df.format(transferResult); S_cashTxtView.setText(String.valueOf(cashResultStr)); S_webuserTxtView.setText(String.valueOf(webuserResultStr)); S_transferTxtView.setText(String.valueOf(transferResultStr)); } if (Qty.length() == 0) { S_cashTxtView.setText(String.valueOf(cashDouble)); S_webuserTxtView.setText(String.valueOf(webuserDouble)); S_transferTxtView.setText(String.valueOf(transferDouble)); } } } and I am getting following error on logcat 08-28 15:04:12.839: E/AndroidRuntime(584): Uncaught handler: thread main exiting due to uncaught exception 08-28 15:04:12.848: E/AndroidRuntime(584): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.mokshya.jsontutorialhos.xmltest/com.mokshya.jsontutorial.Main}: java.lang.NullPointerException 08-28 15:04:12.848: E/AndroidRuntime(584): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2401) 08-28 15:04:12.848: E/AndroidRuntime(584): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2417) 08-28 15:04:12.848: E/AndroidRuntime(584): at android.app.ActivityThread.access$2100(ActivityThread.java:116) 08-28 15:04:12.848: E/AndroidRuntime(584): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1794) 08-28 15:04:12.848: E/AndroidRuntime(584): at android.os.Handler.dispatchMessage(Handler.java:99) 08-28 15:04:12.848: E/AndroidRuntime(584): at android.os.Looper.loop(Looper.java:123) 08-28 15:04:12.848: E/AndroidRuntime(584): at android.app.ActivityThread.main(ActivityThread.java:4203) 08-28 15:04:12.848: E/AndroidRuntime(584): at java.lang.reflect.Method.invokeNative(Native Method) 08-28 15:04:12.848: E/AndroidRuntime(584): at java.lang.reflect.Method.invoke(Method.java:521) 08-28 15:04:12.848: E/AndroidRuntime(584): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791) 08-28 15:04:12.848: E/AndroidRuntime(584): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549) 08-28 15:04:12.848: E/AndroidRuntime(584): at dalvik.system.NativeStart.main(Native Method) 08-28 15:04:12.848: E/AndroidRuntime(584): Caused by: java.lang.NullPointerException 08-28 15:04:12.848: E/AndroidRuntime(584): at com.mokshya.jsontutorial.Main.onCreate(Main.java:111) 08-28 15:04:12.848: E/AndroidRuntime(584): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1123) 08-28 15:04:12.848: E/AndroidRuntime(584): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2364)

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• Why is XML Deserilzation not throwing exceptions when it should.

  - by chobo2

  Hi Here is some dummy xml and dummy xml schema I made. schema <?xml version="1.0" encoding="utf-8"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="http://www.domain.com" xmlns="http://www.domain.com" elementFormDefault="qualified"> <xs:element name="vehicles"> <xs:complexType> <xs:sequence> <xs:element name="owner" minOccurs="1" maxOccurs="1"> <xs:simpleType> <xs:restriction base="xs:string"> <xs:minLength value="2" /> <xs:maxLength value="8" /> </xs:restriction> </xs:simpleType> </xs:element> <xs:element name="Car" minOccurs="1" maxOccurs="1"> <xs:complexType> <xs:sequence> <xs:element name="Information" type="CarInfo" minOccurs="0" maxOccurs="unbounded" /> </xs:sequence> </xs:complexType> </xs:element> <xs:element name="Truck"> <xs:complexType> <xs:sequence> <xs:element name="Information" type="CarInfo" minOccurs="0" maxOccurs="unbounded"/> </xs:sequence> </xs:complexType> </xs:element> <xs:element name="SUV"> <xs:complexType> <xs:sequence> <xs:element name="Information" type="CarInfo" minOccurs="0" maxOccurs="unbounded" /> </xs:sequence> </xs:complexType> </xs:element> </xs:sequence> </xs:complexType> </xs:element> <xs:complexType name="CarInfo"> <xs:sequence> <xs:element name="CarName"> <xs:simpleType> <xs:restriction base="xs:string"> <xs:minLength value="1"/> <xs:maxLength value="50"/> </xs:restriction> </xs:simpleType> </xs:element> <xs:element name="CarPassword"> <xs:simpleType> <xs:restriction base="xs:string"> <xs:minLength value="6"/> <xs:maxLength value="50"/> </xs:restriction> </xs:simpleType> </xs:element> <xs:element name="CarEmail"> <xs:simpleType> <xs:restriction base="xs:string"> <xs:pattern value="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"/> </xs:restriction> </xs:simpleType> </xs:element> </xs:sequence> </xs:complexType> </xs:schema> xml sample <?xml version="1.0" encoding="utf-8" ?> <vehicles> <owner>Car</owner> <Car> <Information> <CarName>Bob</CarName> <CarPassword>123456</CarPassword> <CarEmail>[email protected]</CarEmail> </Information> <Information> <CarName>Bob2</CarName> <CarPassword>123456</CarPassword> <CarEmail>[email protected]</CarEmail> </Information> </Car> <Truck> <Information> <CarName>Jim</CarName> <CarPassword>123456</CarPassword> <CarEmail>[email protected]</CarEmail> </Information> <Information> <CarName>Jim2</CarName> <CarPassword>123456</CarPassword> <CarEmail>[email protected]</CarEmail> </Information> </Truck> <SUV> <Information> <CarName>Jane</CarName> <CarPassword>123456</CarPassword> <CarEmail>[email protected]</CarEmail> </Information> <Information> <CarName>Jane</CarName> <CarPassword>123456</CarPassword> <CarEmail>[email protected]</CarEmail> </Information> </SUV> </vehicles> Serialization Class using System; using System.Collections.Generic; using System.Xml; using System.Xml.Serialization; [XmlRoot("vehicles")] public class MyClass { public MyClass() { Cars = new List<Information>(); Trucks = new List<Information>(); SUVs = new List<Information>(); } [XmlElement(ElementName = "owner")] public string Owner { get; set; } [XmlElement("Car")] public List<Information> Cars { get; set; } [XmlElement("Truck")] public List<Information> Trucks { get; set; } [XmlElement("SUV")] public List<Information> SUVs { get; set; } } public class CarInfo { public CarInfo() { Info = new List<Information>(); } [XmlElement("Information")] public List<Information> Info { get; set; } } public class Information { [XmlElement(ElementName = "CarName")] public string CarName { get; set; } [XmlElement("CarPassword")] public string CarPassword { get; set; } [XmlElement("CarEmail")] public string CarEmail { get; set; } } Now I think this should all validate. If not assume it is write as my real file does work and this is what this dummy one is based off. Now my problem is this. I want to enforce as much as I can from my schema. Such as the "owner" tag must be the first element and should show up one time and only one time ( minOccurs="1" maxOccurs="1"). Right now I can remove the owner element from my dummy xml file and deseriliaze it and it will go on it's happy way and convert it to object and will just put that property as null. I don't want that I want it to throw an exception or something saying this does match what was expected. I don't want to have to validate things like that once deserialized. Same goes for the <car></car> tag I want that to appear always even if there is no information yet I can remove that too and it will be happy with that. So what tags do I have to add to make my serialization class know that these things are required and if they are not found throw an exception.

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• How to maintain the state of button cutom listview in android

  - by Akshay

  I have custom ListView with three TextView three Button and three Chronometer. And the situation is I am loading the ListView properly.But while loading ListView I am disabling some button in the ListView by checking one parameter. Up to this point ListView is showing it's row properly. But when I am scrolling the ListView at that time previously enabled Button are getting disabled.What I am doing wrong I am not getting can one please point out my mistake Or any suggestion. Here is my Adapter class. public class OrderSmartKitchenAdapter extends BaseAdapter { private int flagDeliveryComplete = 0; private int flagPreparationComplete = 0; private int flagPreparationStarted = 0; private List<OrderitemdetailsBO> list = new ArrayList<OrderitemdetailsBO(); private int orderStatus; public OrderSmartKitchenAdapter() { // TODO Auto-generated constructor stub } public void setOrderList(List<OrderitemdetailsBO> orderList) { this.list = orderList; } @Override public int getCount() { // TODO Auto-generated method stub Log.i("OrderItemList Size :-", Integer.toString(list.size())); return list.size(); } @Override public Object getItem(int position) { // TODO Auto-generated method stub return null; } @Override public long getItemId(int position) { // TODO Auto-generated method stub return 0; } @Override public View getView(final int position, View convertView,ViewGroup parent) { // TODO Auto-generated method stub final ViewHolder viewHolder ; if (convertView == null) { layoutInflater = LayoutInflater.from(myContext); convertView = layoutInflater.inflate(R.layout.table_row_view,null); viewHolder = new ViewHolder(); viewHolder.txtTableNumber = (TextView) convertView.findViewById(R.id.txtTableNumber); viewHolder.txtMenuItem = (TextView) convertView.findViewById(R.id.txtMenuItem); viewHolder.txtQuantity = (TextView) convertView.findViewById(R.id.txtQuantity); viewHolder.txtOrderAcceptanceTime = (TextView) convertView.findViewById(R.id.txtOrderAcceptanceTime); viewHolder.txtElapsedTimeOfOrderAcceptance = (Chronometer) convertView.findViewById(R.id.txtElapsedTimeOfOrderAcceptance); viewHolder.btnPreparationStart = (Button) convertView.findViewById(R.id.btnPreparationStart); viewHolder.btnPreparationStart.setTag(position); viewHolder.txtElapsedTimeForPreparation = (Chronometer) convertView.findViewById(R.id.txtElapsedTimeForPrepatration); viewHolder.btnPreparationComplete = (Button) convertView.findViewById(R.id.btnPreparationCompleted); viewHolder.btnPreparationComplete.setTag(position); viewHolder.txtElapsedTimeForDeliveryComplete = (Chronometer) convertView.findViewById(R.id.txtElapsedTimeForCompleation); viewHolder.btnDeliveryComplete = (Button) convertView.findViewById(R.id.btnOrderComplete); viewHolder.btnDeliveryComplete.setTag(position); convertView.setTag(viewHolder); } else{ viewHolder = (ViewHolder)convertView.getTag(); viewHolder.btnDeliveryComplete.setTag(position); viewHolder.btnPreparationComplete.setTag(position); viewHolder.btnPreparationStart.setTag(position); } if (list.get(position) != null) { OrderitemdetailsBO orderitemdetailsBO = new OrderitemdetailsBO(); orderitemdetailsBO = list.get(position); viewHolder.txtTableNumber.setText(orderitemdetailsBO.getOrderitemid().toString()); viewHolder.txtMenuItem.setText(orderitemdetailsBO.getMenuitemname().toString()); viewHolder.txtQuantity.setText(orderitemdetailsBO.getQuantity().toString()); Log.i("Table Number :-", Long.toString(orderitemdetailsBO.getOrderitemid())); Log.i("Menu Name :-", orderitemdetailsBO.getMenuitemname().toString()); Log.i("Quantity", orderitemdetailsBO.getQuantity().toString()); Date acceptTime = new Date(); acceptTime = orderitemdetailsBO.getOrderdatetime(); viewHolder.txtOrderAcceptanceTime.setText(DateUtil.getDateAsString(acceptTime,"HH:mm")); Log.i("Order Accept Time :-", acceptTime.getMinutes() + ":"+ acceptTime.getSeconds()); orderStatus = orderitemdetailsBO.getOrderstatus(); Date preparationStartTime = new Date(); preparationStartTime = orderitemdetailsBO.getPreparationstarttime(); if(preparationStartTime != null) { Log.i("OrderSmartKitchenActivity", "2 Order Acceptance Time :-" + "Menu Item id "+ orderitemdetailsBO.getOrderitemid() + " Preparation Start time " + orderitemdetailsBO.getPreparationstarttime() ); viewHolder.txtElapsedTimeOfOrderAcceptance.stop(); Log.i("Preparation Start Time :-",preparationStartTime.getMinutes() + ":" + preparationStartTime.getSeconds()); viewHolder.txtElapsedTimeOfOrderAcceptance.setText(DateUtil.getDateAsString(preparationStartTime,"MM:ss")); viewHolder.txtElapsedTimeOfOrderAcceptance.stop(); viewHolder.btnPreparationStart.setEnabled(false); viewHolder.btnPreparationStart.setClickable(false); viewHolder.btnPreparationStart.setBackgroundColor(Color.LTGRAY); } else { Long n = acceptTime.getTime(); Log.i("OrderSmartKitchenActivity", "Order Acceptance Time :-" + "Menu Item id "+ orderitemdetailsBO.getOrderitemid() + " Acceptance time" + Long.toString(n) + " Preparation Start time " + orderitemdetailsBO.getPreparationstarttime() ); // Calculate Time difference viewHolder.txtElapsedTimeOfOrderAcceptance.setBase(SystemClock.elapsedRealtime() - System.currentTimeMillis() + n); viewHolder.txtElapsedTimeOfOrderAcceptance.getBase(); viewHolder.txtElapsedTimeOfOrderAcceptance.start(); viewHolder.txtElapsedTimeOfOrderAcceptance.setFormat("%s"); } viewHolder.btnPreparationStart.setOnClickListener(new OnClickListener() { @Override public void onClick(final View v) { // TODO Auto-generated method stub if (flagPreparationStarted == 0) { flagPreparationStarted++; v.startAnimation(playAnimation()); handler.postDelayed(new Runnable() { @Override public void run() { // TODO Auto-generated method stub v.clearAnimation(); Date currentTime = new Date(); // Set Preparation Start Time. viewHolder.txtElapsedTimeOfOrderAcceptance.stop(); Date setTime = new Date(currentTime.getTime() * 1000); OrderitemdetailsBO orderitemdetailsBO = list.get(position); orderitemdetailsBO.setPreparationstarttime(setTime); String orderDetails = "2"; String getPosition = Integer.toString(position); viewHolder.btnPreparationStart.setBackgroundColor(Color.LTGRAY); new sendOrderStatusToServer().execute(orderDetails,getPosition); } }, 5000); } else { handler.removeCallbacksAndMessages(null); v.clearAnimation(); flagPreparationStarted = 0; Log.i("Handler Removed. :-", "Here"); } } }); String preparationTime = orderitemdetailsBO.getOrderpreparationtime(); if(preparationTime != null && orderStatus == order_preparationComplete) { viewHolder.txtElapsedTimeForPreparation.setText(preparationTime); viewHolder.txtElapsedTimeForPreparation.stop(); viewHolder.btnPreparationComplete.getTag(position); viewHolder.btnPreparationComplete.setEnabled(false); viewHolder.btnPreparationComplete.setClickable(false); viewHolder.btnPreparationComplete.setBackgroundColor(Color.LTGRAY); } else if( orderStatus == order_preparationStart || orderStatus == orderReceived || orderStatus == order_delivered){ Long n = acceptTime.getTime(); Log.i("Preparation Start Time :-", Long.toString(n)); viewHolder.txtElapsedTimeForPreparation.setBase(SystemClock.elapsedRealtime() - System.currentTimeMillis() + n); viewHolder.txtElapsedTimeForPreparation.getBase(); viewHolder.txtElapsedTimeForPreparation.start(); viewHolder.txtElapsedTimeForPreparation.setFormat("%s"); } viewHolder.btnPreparationComplete.setOnClickListener(new OnClickListener() { @Override public void onClick(final View v) { // TODO Auto-generated method if (flagPreparationComplete == 0) { flagPreparationComplete++; v.startAnimation(playAnimation()); handler.postDelayed(new Runnable() { @Override public void run() { // TODO Auto-generated method stub v.clearAnimation(); OrderitemdetailsBO orderitemdetailsBO = list.get(position); Date date = orderitemdetailsBO.getPreparationstarttime(); if(date != null) { viewHolder.txtElapsedTimeForPreparation.stop(); Date currentTime = new Date(); Calendar calendar = Calendar.getInstance(); int minute = calendar.get(Calendar.MINUTE); int second = calendar.get(Calendar.SECOND); orderitemdetailsBO.setOrderpreparationtime(calendar.get(Calendar.MINUTE) +":" +calendar.get(Calendar.SECOND)); String orderDetails = "3"; String getPosition = Integer.toString(position); viewHolder.btnPreparationComplete.setBackgroundColor(Color.LTGRAY); new sendOrderStatusToServer().execute(orderDetails,getPosition); } else { Toast.makeText(myContext, "Please Enter Preparation Start Time.", Toast.LENGTH_LONG).show(); } } }, 5000); } else { handler.removeCallbacksAndMessages(null); v.clearAnimation(); flagPreparationComplete = 0; } } }); String deleveredTime = orderitemdetailsBO.getOrderdeliverytime(); if(deleveredTime != null && orderStatus == order_delivered) { Date delevered = new Date(Long.parseLong(deleveredTime)); viewHolder.txtElapsedTimeForPreparation.setText(DateUtil.getDateAsString(delevered,"MM:ss")); Log.i("Preparation Start Time :-", delevered.getMinutes()+":"+delevered.getSeconds()); viewHolder.txtElapsedTimeForPreparation.stop(); viewHolder.btnDeliveryComplete.getTag(position); viewHolder.btnDeliveryComplete.setEnabled(false); viewHolder.btnDeliveryComplete.setClickable(false); viewHolder.btnDeliveryComplete.setBackgroundColor(Color.LTGRAY); } else if(orderStatus == 3 || orderStatus == 2 || orderStatus == 1) { Long n = acceptTime.getTime(); Log.i("Preparation Start Time :-", Long.toString(n)); viewHolder.txtElapsedTimeForDeliveryComplete.setTag(list.get(position)); viewHolder.txtElapsedTimeForDeliveryComplete.setBase(SystemClock.elapsedRealtime() - System.currentTimeMillis() + n); viewHolder.txtElapsedTimeForDeliveryComplete.getBase(); viewHolder.txtElapsedTimeForDeliveryComplete.start(); viewHolder.txtElapsedTimeForDeliveryComplete.setFormat("%s"); } viewHolder.btnDeliveryComplete.setOnClickListener(new OnClickListener() { @Override public void onClick(final View v) { // TODO Auto-generated method stub if (flagDeliveryComplete == 0) { flagDeliveryComplete++; v.startAnimation(playAnimation()); handler.postDelayed(new Runnable() { @Override public void run() { // TODO Auto-generated method stub v.clearAnimation(); OrderitemdetailsBO orderitemdetailsBO = list.get(position); Date date = orderitemdetailsBO.getPreparationstarttime(); String preparationComplete = orderitemdetailsBO.getOrderpreparationtime(); if(date != null && preparationComplete != null ) { Date currentTime = new Date(); Calendar calendar = Calendar.getInstance(); viewHolder.txtElapsedTimeForDeliveryComplete.stop(); orderitemdetailsBO.setOrderdeliverytime(calendar.get(Calendar.MINUTE) +":"+calendar.get(Calendar.SECOND)); String orderDetails = Integer.toString(order_delivered); String getPosition = Integer.toString(position); viewHolder.btnDeliveryComplete.setBackgroundColor(Color.LTGRAY); new sendOrderStatusToServer().execute(orderDetails,getPosition); } else { Toast.makeText(myContext, "Please Enter Preparation Start Time & Preparation Complete Time.", Toast.LENGTH_LONG).show(); } } }, 5000); } else { handler.removeCallbacksAndMessages(null); v.clearAnimation(); flagDeliveryComplete = 0; } } }); } return convertView; } } private static class ViewHolder { protected TextView txtTableNumber; protected TextView txtMenuItem; protected TextView txtQuantity; protected TextView txtOrderAcceptanceTime; protected Chronometer txtElapsedTimeOfOrderAcceptance; protected Button btnPreparationStart; protected Chronometer txtElapsedTimeForPreparation; protected Button btnPreparationComplete; protected Chronometer txtElapsedTimeForDeliveryComplete; protected Button btnDeliveryComplete; }

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• org.apache.http.conn.HttpHostConnectException:Connection to http://172.20.38.143 refused

  - by Passion

  I have developed client server Application .I am accessing mysql with php running on my machine and client running on my cell which is connected to machine.WI-FI is also switched ON. Internet Permission are also added in Manifest file but then also the i encounter error 172.20.38.143 is IP OF MY MACHINE 06-01 13:20:10.391: W/System.err(11157): org.apache.http.conn.HttpHostConnectException: Connection to http://172.20.38.143 refused 06-01 13:20:10.401: W/System.err(11157): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:183) 06-01 13:20:10.401: W/System.err(11157): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164) 06-01 13:20:10.401: W/System.err(11157): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119) 06-01 13:20:10.401: W/System.err(11157): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360) 06-01 13:20:10.401: W/System.err(11157): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:674) 06-01 13:20:10.401: W/System.err(11157): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:511) 06-01 13:20:10.401: W/System.err(11157): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:489) 06-01 13:20:10.401: W/System.err(11157): at nineandroid.net.example.library.JSONParser.getJSONFromUrl(JSONParser.java:42) 06-01 13:20:10.401: W/System.err(11157): at nineandroid.net.example.library.UserFunctions.registerUser(UserFunctions.java:59) 06-01 13:20:10.401: W/System.err(11157): at nineandroid.net.example.RegisterActivity$1.onClick(RegisterActivity.java:52) 06-01 13:20:10.411: W/System.err(11157): at android.view.View.performClick(View.java:3567) 06-01 13:20:10.411: W/System.err(11157): at android.view.View$PerformClick.run(View.java:14224) 06-01 13:20:10.411: W/System.err(11157): at android.os.Handler.handleCallback(Handler.java:605) 06-01 13:20:10.411: W/System.err(11157): at android.os.Handler.dispatchMessage(Handler.java:92) 06-01 13:20:10.411: W/System.err(11157): at android.os.Looper.loop(Looper.java:137) 06-01 13:20:10.411: W/System.err(11157): at android.app.ActivityThread.main(ActivityThread.java:4517) 06-01 13:20:10.411: W/System.err(11157): at java.lang.reflect.Method.invokeNative(Native Method) 06-01 13:20:10.411: W/System.err(11157): at java.lang.reflect.Method.invoke(Method.java:511) 06-01 13:20:10.411: W/System.err(11157): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:993) 06-01 13:20:10.421: W/System.err(11157): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:760) 06-01 13:20:10.421: W/System.err(11157): at dalvik.system.NativeStart.main(Native Method) 06-01 13:20:10.421: W/System.err(11157): Caused by: java.net.ConnectException: failed to connect to /172.20.38.143 (port 80): connect failed: ENETUNREACH (Network is unreachable) 06-01 13:20:10.431: W/System.err(11157): at libcore.io.IoBridge.connect(IoBridge.java:114) 06-01 13:20:10.431: W/System.err(11157): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192) 06-01 13:20:10.431: W/System.err(11157): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459) 06-01 13:20:10.431: W/System.err(11157): at java.net.Socket.connect(Socket.java:848) 06-01 13:20:10.431: W/System.err(11157): at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119) 06-01 13:20:10.431: W/System.err(11157): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144) 06-01 13:20:10.431: W/System.err(11157): ... 20 more 06-01 13:20:10.431: W/System.err(11157): Caused by: libcore.io.ErrnoException: connect failed: ENETUNREACH (Network is unreachable) 06-01 13:20:10.441: W/System.err(11157): at libcore.io.Posix.connect(Native Method) 06-01 13:20:10.441: W/System.err(11157): at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:85) 06-01 13:20:10.441: W/System.err(11157): at libcore.io.IoBridge.connectErrno(IoBridge.java:127) 06-01 13:20:10.441: W/System.err(11157): at libcore.io.IoBridge.connect(IoBridge.java:112) 06-01 13:20:10.441: W/System.err(11157): ... 25 more 06-01 13:20:10.441: E/Buffer Error(11157): Error converting result java.lang.NullPointerException 06-01 13:20:10.451: E/JSON Parser(11157): Error parsing data org.json.JSONException: End of input at character 0 of 06-01 13:20:10.451: D/AndroidRuntime(11157): Shutting down VM 06-01 13:20:10.451: W/dalvikvm(11157): threadid=1: thread exiting with uncaught exception (group=0x40c0aa68) 06-01 13:20:10.451: E/AndroidRuntime(11157): FATAL EXCEPTION: main 06-01 13:20:10.451: E/AndroidRuntime(11157): java.lang.NullPointerException 06-01 13:20:10.451: E/AndroidRuntime(11157): at nineandroid.net.example.RegisterActivity$1.onClick(RegisterActivity.java:56) 06-01 13:20:10.451: E/AndroidRuntime(11157): at android.view.View.performClick(View.java:3567) 06-01 13:20:10.451: E/AndroidRuntime(11157): at android.view.View$PerformClick.run(View.java:14224) 06-01 13:20:10.451: E/AndroidRuntime(11157): at android.os.Handler.handleCallback(Handler.java:605) 06-01 13:20:10.451: E/AndroidRuntime(11157): at android.os.Handler.dispatchMessage(Handler.java:92) 06-01 13:20:10.451: E/AndroidRuntime(11157): at android.os.Looper.loop(Looper.java:137) 06-01 13:20:10.451: E/AndroidRuntime(11157): at android.app.ActivityThread.main(ActivityThread.java:4517) 06-01 13:20:10.451: E/AndroidRuntime(11157): at java.lang.reflect.Method.invokeNative(Native Method) 06-01 13:20:10.451: E/AndroidRuntime(11157): at java.lang.reflect.Method.invoke(Method.java:511) 06-01 13:20:10.451: E/AndroidRuntime(11157): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:993) 06-01 13:20:10.451: E/AndroidRuntime(11157): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:760) 06-01 13:20:10.451: E/AndroidRuntime(11157): at dalvik.system.NativeStart.main(Native Method) UserFunctions.java to call jsonParser public class UserFunctions { private JSONParser jsonParser; private static String loginURL = "http://172.20.38.143/ah_login_api/"; private static String registerURL = "http://172.20.38.143/ah_login_api/"; private static String login_tag = "login"; private static String register_tag = "register"; // constructor public UserFunctions(){ jsonParser = new JSONParser(); } /** * function make Login Request * @param email * @param password * */ public JSONObject loginUser(String email, String password){ // Building Parameters List<NameValuePair> params = new ArrayList<NameValuePair>(); params.add(new BasicNameValuePair("tag", login_tag)); params.add(new BasicNameValuePair("email", email)); params.add(new BasicNameValuePair("password", password)); JSONObject json = jsonParser.getJSONFromUrl(loginURL, params); // return json // Log.e("JSON", json.toString()); return json; } /** * function make Login Request * @param name * @param email * @param password * */ public JSONObject registerUser(String name, String email, String password){ // Building Parameters List<NameValuePair> params = new ArrayList<NameValuePair>(); params.add(new BasicNameValuePair("tag", register_tag)); params.add(new BasicNameValuePair("name", name)); params.add(new BasicNameValuePair("email", email)); params.add(new BasicNameValuePair("password", password)); // getting JSON Object JSONObject json = jsonParser.getJSONFromUrl(registerURL, params); // return json return json; } /** * Function get Login status * */ public boolean isUserLoggedIn(Context context){ DatabaseHandler db = new DatabaseHandler(context); int count = db.getRowCount(); if(count > 0){ // user logged in return true; } return false; } /** * Function to logout user * Reset Database * */ public boolean logoutUser(Context context){ DatabaseHandler db = new DatabaseHandler(context); db.resetTables(); return true; } } jsonParser.java public class JSONParser { static InputStream is = null; static JSONObject jObj = null; static String json = ""; // constructor public JSONParser() { } public JSONObject getJSONFromUrl(String url, List<NameValuePair> params) { // Making HTTP request try { // defaultHttpClient DefaultHttpClient httpClient = new DefaultHttpClient(); HttpPost httpPost = new HttpPost(url); httpPost.setEntity(new UrlEncodedFormEntity(params)); HttpResponse httpResponse = httpClient.execute(httpPost); HttpEntity httpEntity = httpResponse.getEntity(); is = httpEntity.getContent(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } try { BufferedReader reader = new BufferedReader(new InputStreamReader( is, "iso-8859-1"), 8); StringBuilder sb = new StringBuilder(); String line = null; while ((line = reader.readLine()) != null) { sb.append(line + "\n"); } is.close(); json = sb.toString(); Log.e("JSON", json); } catch (Exception e) { Log.e("Buffer Error", "Error converting result " + e.toString()); } // try parse the string to a JSON object try { jObj = new JSONObject(json); } catch (JSONException e) { Log.e("JSON Parser", "Error parsing data " + e.toString()); } // return JSON String return jObj; } } RegisterActivity.java public class RegisterActivity extends Activity { Button btnRegister; Button btnLinkToLogin; EditText inputFullName; EditText inputEmail; EditText inputPassword; TextView registerErrorMsg; // JSON Response node names private static String KEY_SUCCESS = "success"; private static String KEY_UID = "uid"; private static String KEY_NAME = "name"; private static String KEY_EMAIL = "email"; private static String KEY_CREATED_AT = "created_at"; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.register); // Importing all assets like buttons, text fields inputFullName = (EditText) findViewById(R.id.registerName); inputEmail = (EditText) findViewById(R.id.registerEmail); inputPassword = (EditText) findViewById(R.id.registerPassword); btnRegister = (Button) findViewById(R.id.btnRegister); btnLinkToLogin = (Button) findViewById(R.id.btnLinkToLoginScreen); registerErrorMsg = (TextView) findViewById(R.id.register_error); // Register Button Click event btnRegister.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { String name = inputFullName.getText().toString(); String email = inputEmail.getText().toString(); String password = inputPassword.getText().toString(); UserFunctions userFunction = new UserFunctions(); JSONObject json = userFunction.registerUser(name, email, password); // check for login response try { if (json.getString(KEY_SUCCESS) != null) { registerErrorMsg.setText(""); String res = json.getString(KEY_SUCCESS); if(Integer.parseInt(res) == 1){ // user successfully registred // Store user details in SQLite Database DatabaseHandler db = new DatabaseHandler(getApplicationContext()); JSONObject json_user = json.getJSONObject("user"); // Clear all previous data in database userFunction.logoutUser(getApplicationContext()); db.addUser(json_user.getString(KEY_NAME), json_user.getString(KEY_EMAIL), json.getString(KEY_UID), json_user.getString(KEY_CREATED_AT)); // Launch Dashboard Screen Intent dashboard = new Intent(getApplicationContext(), DashboardActivity.class); // Close all views before launching Dashboard dashboard.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(dashboard); // Close Registration Screen finish(); }else{ // Error in registration registerErrorMsg.setText("Error occured in registration"); } } } catch (JSONException e) { e.printStackTrace(); } } }); // Link to Login Screen btnLinkToLogin.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { Intent i = new Intent(getApplicationContext(), LoginActivity.class); startActivity(i); // Close Registration View finish(); } }); } }

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• ASP.NET Web API Exception Handling

  - by Fredrik N

  When I talk about exceptions in my product team I often talk about two kind of exceptions, business and critical exceptions. Business exceptions are exceptions thrown based on “business rules”, for example if you aren’t allowed to do a purchase. Business exceptions in most case aren’t important to log into a log file, they can directly be shown to the user. An example of a business exception could be "DeniedToPurchaseException”, or some validation exceptions such as “FirstNameIsMissingException” etc. Critical Exceptions are all other kind of exceptions such as the SQL server is down etc. Those kind of exception message need to be logged and should not reach the user, because they can contain information that can be harmful if it reach out to wrong kind of users. I often distinguish business exceptions from critical exceptions by creating a base class called BusinessException, then in my error handling code I catch on the type BusinessException and all other exceptions will be handled as critical exceptions. This blog post will be about different ways to handle exceptions and how Business and Critical Exceptions could be handled. Web API and Exceptions the basics When an exception is thrown in a ApiController a response message will be returned with a status code set to 500 and a response formatted by the formatters based on the “Accept” or “Content-Type” HTTP header, for example JSON or XML. Here is an example:   public IEnumerable<string> Get() { throw new ApplicationException("Error!!!!!"); return new string[] { "value1", "value2" }; } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } The response message will be: HTTP/1.1 500 Internal Server Error Content-Length: 860 Content-Type: application/json; charset=utf-8 { "ExceptionType":"System.ApplicationException","Message":"Error!!!!!","StackTrace":" at ..."} .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   The stack trace will be returned to the client, this is because of making it easier to debug. Be careful so you don’t leak out some sensitive information to the client. So as long as you are developing your API, this is not harmful. In a production environment it can be better to log exceptions and return a user friendly exception instead of the original exception. There is a specific exception shipped with ASP.NET Web API that will not use the formatters based on the “Accept” or “Content-Type” HTTP header, it is the exception is the HttpResponseException class. Here is an example where the HttpReponseExcetpion is used: // GET api/values [ExceptionHandling] public IEnumerable<string> Get() { throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.InternalServerError)); return new string[] { "value1", "value2" }; } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } The response will not contain any content, only header information and the status code based on the HttpStatusCode passed as an argument to the HttpResponseMessage. Because the HttpResponsException takes a HttpResponseMessage as an argument, we can give the response a content: public IEnumerable<string> Get() { throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.InternalServerError) { Content = new StringContent("My Error Message"), ReasonPhrase = "Critical Exception" }); return new string[] { "value1", "value2" }; } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   The code above will have the following response:   HTTP/1.1 500 Critical Exception Content-Length: 5 Content-Type: text/plain; charset=utf-8 My Error Message .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } The Content property of the HttpResponseMessage doesn’t need to be just plain text, it can also be other formats, for example JSON, XML etc. By using the HttpResponseException we can for example catch an exception and throw a user friendly exception instead: public IEnumerable<string> Get() { try { DoSomething(); return new string[] { "value1", "value2" }; } catch (Exception e) { throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.InternalServerError) { Content = new StringContent("An error occurred, please try again or contact the administrator."), ReasonPhrase = "Critical Exception" }); } } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   Adding a try catch to every ApiController methods will only end in duplication of code, by using a custom ExceptionFilterAttribute or our own custom ApiController base class we can reduce code duplicationof code and also have a more general exception handler for our ApiControllers . By creating a custom ApiController’s and override the ExecuteAsync method, we can add a try catch around the base.ExecuteAsync method, but I prefer to skip the creation of a own custom ApiController, better to use a solution that require few files to be modified. The ExceptionFilterAttribute has a OnException method that we can override and add our exception handling. Here is an example: using System; using System.Diagnostics; using System.Net; using System.Net.Http; using System.Web.Http; using System.Web.Http.Filters; public class ExceptionHandlingAttribute : ExceptionFilterAttribute { public override void OnException(HttpActionExecutedContext context) { if (context.Exception is BusinessException) { throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.InternalServerError) { Content = new StringContent(context.Exception.Message), ReasonPhrase = "Exception" }); } //Log Critical errors Debug.WriteLine(context.Exception); throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.InternalServerError) { Content = new StringContent("An error occurred, please try again or contact the administrator."), ReasonPhrase = "Critical Exception" }); } } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   Note: Something to have in mind is that the ExceptionFilterAttribute will be ignored if the ApiController action method throws a HttpResponseException. The code above will always make sure a HttpResponseExceptions will be returned, it will also make sure the critical exceptions will show a more user friendly message. The OnException method can also be used to log exceptions. By using a ExceptionFilterAttribute the Get() method in the previous example can now look like this: public IEnumerable<string> Get() { DoSomething(); return new string[] { "value1", "value2" }; } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } To use the an ExceptionFilterAttribute, we can for example add the ExceptionFilterAttribute to our ApiControllers methods or to the ApiController class definition, or register it globally for all ApiControllers. You can read more about is here. Note: If something goes wrong in the ExceptionFilterAttribute and an exception is thrown that is not of type HttpResponseException, a formatted exception will be thrown with stack trace etc to the client. How about using a custom IHttpActionInvoker? We can create our own IHTTPActionInvoker and add Exception handling to the invoker. The IHttpActionInvoker will be used to invoke the ApiController’s ExecuteAsync method. Here is an example where the default IHttpActionInvoker, ApiControllerActionInvoker, is used to add exception handling: public class MyApiControllerActionInvoker : ApiControllerActionInvoker { public override Task<HttpResponseMessage> InvokeActionAsync(HttpActionContext actionContext, System.Threading.CancellationToken cancellationToken) { var result = base.InvokeActionAsync(actionContext, cancellationToken); if (result.Exception != null && result.Exception.GetBaseException() != null) { var baseException = result.Exception.GetBaseException(); if (baseException is BusinessException) { return Task.Run<HttpResponseMessage>(() => new HttpResponseMessage(HttpStatusCode.InternalServerError) { Content = new StringContent(baseException.Message), ReasonPhrase = "Error" }); } else { //Log critical error Debug.WriteLine(baseException); return Task.Run<HttpResponseMessage>(() => new HttpResponseMessage(HttpStatusCode.InternalServerError) { Content = new StringContent(baseException.Message), ReasonPhrase = "Critical Error" }); } } return result; } } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } You can register the IHttpActionInvoker with your own IoC to resolve the MyApiContollerActionInvoker, or add it in the Global.asax: GlobalConfiguration.Configuration.Services.Remove(typeof(IHttpActionInvoker), GlobalConfiguration.Configuration.Services.GetActionInvoker()); GlobalConfiguration.Configuration.Services.Add(typeof(IHttpActionInvoker), new MyApiControllerActionInvoker()); .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   How about using a Message Handler for Exception Handling? By creating a custom Message Handler, we can handle error after the ApiController and the ExceptionFilterAttribute is invoked and in that way create a global exception handler, BUT, the only thing we can take a look at is the HttpResponseMessage, we can’t add a try catch around the Message Handler’s SendAsync method. The last Message Handler that will be used in the Wep API pipe-line is the HttpControllerDispatcher and this Message Handler is added to the HttpServer in an early stage. The HttpControllerDispatcher will use the IHttpActionInvoker to invoke the ApiController method. The HttpControllerDipatcher has a try catch that will turn ALL exceptions into a HttpResponseMessage, so that is the reason why a try catch around the SendAsync in a custom Message Handler want help us. If we create our own Host for the Wep API we could create our own custom HttpControllerDispatcher and add or exception handler to that class, but that would be little tricky but is possible. We can in a Message Handler take a look at the HttpResponseMessage’s IsSuccessStatusCode property to see if the request has failed and if we throw the HttpResponseException in our ApiControllers, we could use the HttpResponseException and give it a Reason Phrase and use that to identify business exceptions or critical exceptions. I wouldn’t add an exception handler into a Message Handler, instead I should use the ExceptionFilterAttribute and register it globally for all ApiControllers. BUT, now to another interesting issue. What will happen if we have a Message Handler that throws an exception?  Those exceptions will not be catch and handled by the ExceptionFilterAttribute. I found a  bug in my previews blog post about “Log message Request and Response in ASP.NET WebAPI” in the MessageHandler I use to log incoming and outgoing messages. Here is the code from my blog before I fixed the bug:   public abstract class MessageHandler : DelegatingHandler { protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) { var corrId = string.Format("{0}{1}", DateTime.Now.Ticks, Thread.CurrentThread.ManagedThreadId); var requestInfo = string.Format("{0} {1}", request.Method, request.RequestUri); var requestMessage = await request.Content.ReadAsByteArrayAsync(); await IncommingMessageAsync(corrId, requestInfo, requestMessage); var response = await base.SendAsync(request, cancellationToken); var responseMessage = await response.Content.ReadAsByteArrayAsync(); await OutgoingMessageAsync(corrId, requestInfo, responseMessage); return response; } protected abstract Task IncommingMessageAsync(string correlationId, string requestInfo, byte[] message); protected abstract Task OutgoingMessageAsync(string correlationId, string requestInfo, byte[] message); } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   If a ApiController throws a HttpResponseException, the Content property of the HttpResponseMessage from the SendAsync will be NULL. So a null reference exception is thrown within the MessageHandler. The yellow screen of death will be returned to the client, and the content is HTML and the Http status code is 500. The bug in the MessageHandler was solved by adding a check against the HttpResponseMessage’s IsSuccessStatusCode property: public abstract class MessageHandler : DelegatingHandler { protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) { var corrId = string.Format("{0}{1}", DateTime.Now.Ticks, Thread.CurrentThread.ManagedThreadId); var requestInfo = string.Format("{0} {1}", request.Method, request.RequestUri); var requestMessage = await request.Content.ReadAsByteArrayAsync(); await IncommingMessageAsync(corrId, requestInfo, requestMessage); var response = await base.SendAsync(request, cancellationToken); byte[] responseMessage; if (response.IsSuccessStatusCode) responseMessage = await response.Content.ReadAsByteArrayAsync(); else responseMessage = Encoding.UTF8.GetBytes(response.ReasonPhrase); await OutgoingMessageAsync(corrId, requestInfo, responseMessage); return response; } protected abstract Task IncommingMessageAsync(string correlationId, string requestInfo, byte[] message); protected abstract Task OutgoingMessageAsync(string correlationId, string requestInfo, byte[] message); } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } If we don’t handle the exceptions that can occur in a custom Message Handler, we can have a hard time to find the problem causing the exception. The savior in this case is the Global.asax’s Application_Error: protected void Application_Error() { var exception = Server.GetLastError(); Debug.WriteLine(exception); } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } I would recommend you to add the Application_Error to the Global.asax and log all exceptions to make sure all kind of exception is handled. Summary There are different ways we could add Exception Handling to the Wep API, we can use a custom ApiController, ExceptionFilterAttribute, IHttpActionInvoker or Message Handler. The ExceptionFilterAttribute would be a good place to add a global exception handling, require very few modification, just register it globally for all ApiControllers, even the IHttpActionInvoker can be used to minimize the modifications of files. Adding the Application_Error to the global.asax is a good way to catch all unhandled exception that can occur, for example exception thrown in a Message Handler.   If you want to know when I have posted a blog post, you can follow me on twitter @fredrikn

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• Use Extension method to write cleaner code

  - by Fredrik N

  This blog post will show you step by step to refactoring some code to be more readable (at least what I think). Patrik Löwnedahl gave me some of the ideas when we where talking about making code much cleaner. The following is an simple application that will have a list of movies (Normal and Transfer). The task of the application is to calculate the total sum of each movie and also display the price of each movie. class Program { enum MovieType { Normal, Transfer } static void Main(string[] args) { var movies = GetMovies(); int totalPriceOfNormalMovie = 0; int totalPriceOfTransferMovie = 0; foreach (var movie in movies) { if (movie == MovieType.Normal) { totalPriceOfNormalMovie += 2; Console.WriteLine("$2"); } else if (movie == MovieType.Transfer) { totalPriceOfTransferMovie += 3; Console.WriteLine("$3"); } } } private static IEnumerable<MovieType> GetMovies() { return new List<MovieType>() { MovieType.Normal, MovieType.Transfer, MovieType.Normal }; } } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } In the code above I’m using an enum, a good way to add types (isn’t it ;)). I also use one foreach loop to calculate the price, the loop has a condition statement to check what kind of movie is added to the list of movies. I want to reuse the foreach only to increase performance and let it do two things (isn’t that smart of me?! ;)). First of all I can admit, I’m not a big fan of enum. Enum often results in ugly condition statements and can be hard to maintain (if a new type is added we need to check all the code in our app to see if we use the enum somewhere else). I don’t often care about pre-optimizations when it comes to write code (of course I have performance in mind). I rather prefer to use two foreach to let them do one things instead of two. So based on what I don’t like and Martin Fowler’s Refactoring catalog, I’m going to refactoring this code to what I will call a more elegant and cleaner code. First of all I’m going to use Split Loop to make sure the foreach will do one thing not two, it will results in two foreach (Don’t care about performance here, if the results will results in bad performance, you can refactoring later, but computers are so fast to day, so iterating through a list is not often so time consuming.) Note: The foreach actually do four things, will come to is later. var movies = GetMovies(); int totalPriceOfNormalMovie = 0; int totalPriceOfTransferMovie = 0; foreach (var movie in movies) { if (movie == MovieType.Normal) { totalPriceOfNormalMovie += 2; Console.WriteLine("$2"); } } foreach (var movie in movies) { if (movie == MovieType.Transfer) { totalPriceOfTransferMovie += 3; Console.WriteLine("$3"); } } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } To remove the condition statement we can use the Where extension method added to the IEnumerable<T> and is located in the System.Linq namespace: foreach (var movie in movies.Where( m => m == MovieType.Normal)) { totalPriceOfNormalMovie += 2; Console.WriteLine("$2"); } foreach (var movie in movies.Where( m => m == MovieType.Transfer)) { totalPriceOfTransferMovie += 3; Console.WriteLine("$3"); } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } The above code will still do two things, calculate the total price, and display the price of the movie. I will not take care of it at the moment, instead I will focus on the enum and try to remove them. One way to remove enum is by using the Replace Conditional with Polymorphism. So I will create two classes, one base class called Movie, and one called MovieTransfer. The Movie class will have a property called Price, the Movie will now hold the price:   public class Movie { public virtual int Price { get { return 2; } } } public class MovieTransfer : Movie { public override int Price { get { return 3; } } } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } The following code has no enum and will use the new Movie classes instead: class Program { static void Main(string[] args) { var movies = GetMovies(); int totalPriceOfNormalMovie = 0; int totalPriceOfTransferMovie = 0; foreach (var movie in movies.Where( m => m is Movie)) { totalPriceOfNormalMovie += movie.Price; Console.WriteLine(movie.Price); } foreach (var movie in movies.Where( m => m is MovieTransfer)) { totalPriceOfTransferMovie += movie.Price; Console.WriteLine(movie.Price); } } private static IEnumerable<Movie> GetMovies() { return new List<Movie>() { new Movie(), new MovieTransfer(), new Movie() }; } } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; }   If you take a look at the foreach now, you can see it still actually do two things, calculate the price and display the price. We can do some more refactoring here by using the Sum extension method to calculate the total price of the movies:   static void Main(string[] args) { var movies = GetMovies(); int totalPriceOfNormalMovie = movies.Where(m => m is Movie) .Sum(m => m.Price); int totalPriceOfTransferMovie = movies.Where(m => m is MovieTransfer) .Sum(m => m.Price); foreach (var movie in movies.Where( m => m is Movie)) Console.WriteLine(movie.Price); foreach (var movie in movies.Where( m => m is MovieTransfer)) Console.WriteLine(movie.Price); } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } Now when the Movie object will hold the price, there is no need to use two separate foreach to display the price of the movies in the list, so we can use only one instead: foreach (var movie in movies) Console.WriteLine(movie.Price); .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } If we want to increase the Maintainability index we can use the Extract Method to move the Sum of the prices into two separate methods. The name of the method will explain what we are doing: static void Main(string[] args) { var movies = GetMovies(); int totalPriceOfMovie = TotalPriceOfMovie(movies); int totalPriceOfTransferMovie = TotalPriceOfMovieTransfer(movies); foreach (var movie in movies) Console.WriteLine(movie.Price); } private static int TotalPriceOfMovieTransfer(IEnumerable<Movie> movies) { return movies.Where(m => m is MovieTransfer) .Sum(m => m.Price); } private static int TotalPriceOfMovie(IEnumerable<Movie> movies) { return movies.Where(m => m is Movie) .Sum(m => m.Price); } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } Now to the last thing, I love the ForEach method of the List<T>, but the IEnumerable<T> doesn’t have it, so I created my own ForEach extension, here is the code of the ForEach extension method: public static class LoopExtensions { public static void ForEach<T>(this IEnumerable<T> values, Action<T> action) { Contract.Requires(values != null); Contract.Requires(action != null); foreach (var v in values) action(v); } } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } I will now replace the foreach by using this ForEach method: static void Main(string[] args) { var movies = GetMovies(); int totalPriceOfMovie = TotalPriceOfMovie(movies); int totalPriceOfTransferMovie = TotalPriceOfMovieTransfer(movies); movies.ForEach(m => Console.WriteLine(m.Price)); } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } The ForEach on the movies will now display the price of the movie, but maybe we want to display the name of the movie etc, so we can use Extract Method by moving the lamdba expression into a method instead, and let the method explains what we are displaying: movies.ForEach(DisplayMovieInfo); private static void DisplayMovieInfo(Movie movie) { Console.WriteLine(movie.Price); } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } Now the refactoring is done! Here is the complete code:   class Program { static void Main(string[] args) { var movies = GetMovies(); int totalPriceOfMovie = TotalPriceOfMovie(movies); int totalPriceOfTransferMovie = TotalPriceOfMovieTransfer(movies); movies.ForEach(DisplayMovieInfo); } private static void DisplayMovieInfo(Movie movie) { Console.WriteLine(movie.Price); } private static int TotalPriceOfMovieTransfer(IEnumerable<Movie> movies) { return movies.Where(m => m is MovieTransfer) .Sum(m => m.Price); } private static int TotalPriceOfMovie(IEnumerable<Movie> movies) { return movies.Where(m => m is Movie) .Sum(m => m.Price); } private static IEnumerable<Movie> GetMovies() { return new List<Movie>() { new Movie(), new MovieTransfer(), new Movie() }; } } public class Movie { public virtual int Price { get { return 2; } } } public class MovieTransfer : Movie { public override int Price { get { return 3; } } } pulbic static class LoopExtensions { public static void ForEach<T>(this IEnumerable<T> values, Action<T> action) { Contract.Requires(values != null); Contract.Requires(action != null); foreach (var v in values) action(v); } } .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } I think the new code is much cleaner than the first one, and I love the ForEach extension on the IEnumerable<T>, I can use it for different kind of things, for example: movies.Where(m => m is Movie) .ForEach(DoSomething); .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } By using the Where and ForEach extension method, some if statements can be removed and will make the code much cleaner. But the beauty is in the eye of the beholder. What would you have done different, what do you think will make the first example in the blog post look much cleaner than my results, comments are welcome! If you want to know when I will publish a new blog post, you can follow me on twitter: http://www.twitter.com/fredrikn

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• Azure WNS to Win8 - Push Notifications for Metro Apps

  - by JoshReuben

  Background The Windows Azure Toolkit for Windows 8 allows you to build a Windows Azure Cloud Service that can send Push Notifications to registered Metro apps via Windows Notification Service (WNS). Some configuration is required - you need to: Register the Metro app for Windows Live Application Management Provide Package SID & Client Secret to WNS Modify the Azure Cloud App cscfg file and the Metro app package.appxmanifest file to contain matching Metro package name, SID and client secret. The Mechanism: These notifications take the form of XAML Tile, Toast, Raw or Badge UI notifications. The core engine is provided via the WNS nuget recipe, which exposes an API for constructing payloads and posting notifications to WNS. An application receives push notifications by requesting a notification channel from WNS, which returns a channel URI that the application then registers with a cloud service. In the cloud service, A WnsAccessTokenProvider authenticates with WNS by providing its credentials, the package SID and secret key, and receives in return an access token that the provider caches and can reuse for multiple notification requests. The cloud service constructs a notification request by filling out a template class that contains the information that will be sent with the notification, including text and image references. Using the channel URI of a registered client, the cloud service can then send a notification whenever it has an update for the user. The package contains the NotificationSendUtils class for submitting notifications. The Windows Azure Toolkit for Windows 8 (WAT) provides the PNWorker sample pair of solutions - The Azure server side contains a WebRole & a WorkerRole. The WebRole allows submission of new push notifications into an Azure Queue which the WorkerRole extracts and processes. Further background resources: http://watwindows8.codeplex.com/ - Windows Azure Toolkit for Windows 8 http://watwindows8.codeplex.com/wikipage?title=Push%20Notification%20Worker%20Sample - WAT WNS sample setup http://watwindows8.codeplex.com/wikipage?title=Using%20the%20Windows%208%20Cloud%20Application%20Services%20Application – using Windows 8 with Cloud Application Services A bit of Configuration Register the Metro apps for Windows Live Application Management From the current app manifest of your metro app Publish tab, copy the Package Display Name and the Publisher From: https://manage.dev.live.com/Build/ Package name: <-- we need to change this Client secret: keep this Package Security Identifier (SID): keep this Verify the app here: https://manage.dev.live.com/Applications/Index - so this step is done "If you wish to send push notifications in your application, provide your Package Security Identifier (SID) and client secret to WNS." Provide Package SID & Client Secret to WNS http://msdn.microsoft.com/en-us/library/windows/apps/hh465407.aspx - How to authenticate with WNS https://appdev.microsoft.com/StorePortals/en-us/Account/Signup/PurchaseSubscription - register app with dashboard - need registration code or register a new account & pay $170 shekels http://msdn.microsoft.com/en-us/library/windows/apps/hh868184.aspx - Registering for a Windows Store developer account http://msdn.microsoft.com/en-us/library/windows/apps/hh868187.aspx - Picking a Microsoft account for the Windows Store The WNS Nuget Recipe The WNS Recipe is a nuget package that provides an API for authenticating against WNS, constructing payloads and posting notifications to WNS. After installing this package, a WnsRecipe assembly is added to project references. To send notifications using WNS, first register the application at the Windows Push Notifications & Live Connect portal to obtain Package Security Identifier (SID) and a secret key that your cloud service uses to authenticate with WNS. An application receives push notifications by requesting a notification channel from WNS, which returns a channel URI that the application then registers with a cloud service. In the cloud service, the WnsAccessTokenProvider authenticates with WNS by providing its credentials, the package SID and secret key, and receives in return an access token that the provider caches and can reuse for multiple notification requests. The cloud service constructs a notification request by filling out a template class that contains the information that will be sent with the notification, including text and image references.Using the channel URI of a registered client, the cloud service can then send a notification whenever it has an update for the user. var provider = new WnsAccessTokenProvider(clientId, clientSecret); var notification = new ToastNotification(provider) {     ToastType = ToastType.ToastText02,     Text = new List<string> { "blah"} }; notification.Send(channelUri); the WNS Recipe is instrumented to write trace information via a trace listener – configuratively or programmatically from Application_Start(): WnsDiagnostics.Enable(); WnsDiagnostics.TraceSource.Listeners.Add(new DiagnosticMonitorTraceListener()); WnsDiagnostics.TraceSource.Switch.Level = SourceLevels.Verbose; The WAT PNWorker Sample The Azure server side contains a WebRole & a WorkerRole. The WebRole allows submission of new push notifications into an Azure Queue which the WorkerRole extracts and processes. Overview of Push Notification Worker Sample The toolkit includes a sample application based on the same solution structure as the one created by theWindows 8 Cloud Application Services project template. The sample demonstrates how to off-load the job of sending Windows Push Notifications using a Windows Azure worker role. You can find the source code in theSamples\PNWorker folder. This folder contains a full version of the sample application showing how to use Windows Push Notifications using ASP.NET Membership as the authentication mechanism. The sample contains two different solution files: WATWindows.Azure.sln: This solution must be opened with Visual Studio 2010 and contains the projects related to the Windows Azure web and worker roles. WATWindows.Client.sln: This solution must be opened with Visual Studio 11 and contains the Windows Metro style application project. Only Visual Studio 2010 supports Windows Azure cloud projects so you currently need to use this edition to launch the server application. This will change in a future release of the Windows Azure tools when support for Visual Studio 11 is enabled. Important: Setting up the PNWorker Sample Before running the PNWorker sample, you need to register the application and configure it: 1. Register the app: To register your application, go to the Windows Live Application Management site for Metro style apps at https://manage.dev.live.com/build and sign in with your Windows Live ID. In the Windows Push Notifications & Live Connect page, enter the following information. Package Display Name PNWorker.Sample Publisher CN=127.0.0.1, O=TESTING ONLY, OU=Windows Azure DevFabric 2. 3. Once you register the application, make a note of the values shown in the portal for Client Secret,Package Name and Package SID. 4. Configure the app - double-click the SetupSample.cmd file located inside the Samples\PNWorker folder to launch a tool that will guide you through the process of configuring the sample. setup runs a PowerShell script that requires running with administration privileges to allow the scripts to execute in your machine. When prompted, enter the Client Secret, Package Name, and Package Security Identifier you obtained previously and wait until the tool finishes configuring your sample. Running the PNWorker Sample To run this sample, you must run both the client and the server application projects. 1. Open Visual Studio 2010 as an administrator. Open the WATWindows.Azure.sln solution. Set the start-up project of the solution as the cloud project. Run the app in the dev fabric to test. 2. Open Visual Studio 11 and open the WATWindows.Client.sln solution. Run the Metro client application. In the client application, click Reopen channel and send to server. à the application opens the channel and registers it with the cloud application, & the Output area shows the channel URI. 3. Refresh the WebRole's Push Notifications page to see the UI list the newly registered client. 4. Send notifications to the client application by clicking the Send Notification button. Setup 3 command files + 1 powershell script: SetupSample.cmd –> SetupWPNS.vbs –> SetupWPNS.cmd –> SetupWPNS.UpdateWPNSCredentialsInServiceConfiguration.ps1 appears to set PackageName – from manifest Client Id package security id (SID) – from registration Client Secret – from registration The following configs are modified: WATWindows\ServiceConfiguration.Cloud.cscfg WATWindows\ServiceConfiguration.Local.cscfg WATWindows.Client\package.appxmanifest WatWindows.Notifications A class library – it references the following WNS DLL: C:\WorkDev\CountdownValue\AzureToolkits\WATWindows8\Samples\PNWorker\packages\WnsRecipe.0.0.3.0\lib\net40\WnsRecipe.dll NotificationJobRequest A DataContract for triggering notifications:     using System.Runtime.Serialization; using Microsoft.Windows.Samples.Notifications;     [DataContract]     [KnownType(typeof(WnsAccessTokenProvider))] public class NotificationJobRequest     {               [DataMember] public bool ProcessAsync { get; set; }          [DataMember] public string Payload { get; set; }         [DataMember] public string ChannelUrl { get; set; }         [DataMember] public NotificationType NotificationType { get; set; }         [DataMember] public IAccessTokenProvider AccessTokenProvider { get; set; }         [DataMember] public NotificationSendOptions NotificationSendOptions{ get; set; }     } Investigated these types: WnsAccessTokenProvider – a DataContract that contains the client Id and client secret NotificationType – an enum that can be: Tile, Toast, badge, Raw IAccessTokenProvider – get or reset the access token NotificationSendOptions – SecondsTTL, NotificationPriority (enum), isCache, isRequestForStatus, Tag   There is also a NotificationJobSerializer class which basically wraps a DataContractSerializer serialization / deserialization of NotificationJobRequest The WNSNotificationJobProcessor class This class wraps the NotificationSendUtils API – it periodically extracts any NotificationJobRequest objects from a CloudQueue and submits them to WNS. The ProcessJobMessageRequest method – this is the punchline: it will deserialize a CloudQueueMessage into a NotificationJobRequest & send pass its contents to NotificationUtils to SendAsynchronously / SendSynchronously, (and then dequeue the message).     public override void ProcessJobMessageRequest(CloudQueueMessage notificationJobMessageRequest)         { Trace.WriteLine("Processing a new Notification Job Request", "Information"); NotificationJobRequest pushNotificationJob =                 NotificationJobSerializer.Deserialize(notificationJobMessageRequest.AsString); if (pushNotificationJob != null)             { if (pushNotificationJob.ProcessAsync)                 { Trace.WriteLine("Sending the notification asynchronously", "Information"); NotificationSendUtils.SendAsynchronously( new Uri(pushNotificationJob.ChannelUrl),                         pushNotificationJob.AccessTokenProvider,                         pushNotificationJob.Payload,                         result => this.ProcessSendResult(pushNotificationJob, result),                         result => this.ProcessSendResultError(pushNotificationJob, result),                         pushNotificationJob.NotificationType,                         pushNotificationJob.NotificationSendOptions);                 } else                 { Trace.WriteLine("Sending the notification synchronously", "Information"); NotificationSendResult result = NotificationSendUtils.Send( new Uri(pushNotificationJob.ChannelUrl),                         pushNotificationJob.AccessTokenProvider,                         pushNotificationJob.Payload,                         pushNotificationJob.NotificationType,                         pushNotificationJob.NotificationSendOptions); this.ProcessSendResult(pushNotificationJob, result);                 }             } else             { Trace.WriteLine("Could not deserialize the notification job", "Error");             } this.queue.DeleteMessage(notificationJobMessageRequest);         } Investigation of NotificationSendUtils class - This is the engine – it exposes Send and a SendAsyncronously overloads that take the following params from the NotificationJobRequest: Channel Uri AccessTokenProvider Payload NotificationType NotificationSendOptions WebRole WebRole is a large MVC project – it references WatWindows.Notifications as well as the following WNS DLL: \AzureToolkits\WATWindows8\Samples\PNWorker\packages\WnsRecipe.0.0.3.0\lib\net40\NotificationsExtensions.dll Controllers\PushNotificationController.cs Notification related namespaces:     using Notifications;     using NotificationsExtensions;     using NotificationsExtensions.BadgeContent;     using NotificationsExtensions.RawContent;     using NotificationsExtensions.TileContent;     using NotificationsExtensions.ToastContent;     using Windows.Samples.Notifications; TokenProvider – initialized from the Azure RoleEnvironment:   IAccessTokenProvider tokenProvider = new WnsAccessTokenProvider(         RoleEnvironment.GetConfigurationSettingValue("WNSPackageSID"),         RoleEnvironment.GetConfigurationSettingValue("WNSClientSecret")); SendNotification method – calls QueuePushMessage method to create and serialize a NotificationJobRequest and enqueue it in a CloudQueue [HttpPost]         public ActionResult SendNotification(             [ModelBinder(typeof(NotificationTemplateModelBinder))] INotificationContent notification,             string channelUrl,             NotificationPriority priority = NotificationPriority.Normal)         {             var payload = notification.GetContent();             var options = new NotificationSendOptions()             {                 Priority = priority             };             var notificationType =                 notification is IBadgeNotificationContent ? NotificationType.Badge :                 notification is IRawNotificationContent ? NotificationType.Raw :                 notification is ITileNotificationContent ? NotificationType.Tile :                 NotificationType.Toast;             this.QueuePushMessage(payload, channelUrl, notificationType, options);             object response = new             {                 Status = "Queued for delivery to WNS"             };             return this.Json(response);         } GetSendTemplate method: Create the cshtml partial rendering based on the notification type     [HttpPost]         public ActionResult GetSendTemplate(NotificationTemplateViewModel templateOptions)         {             PartialViewResult result = null;             switch (templateOptions.NotificationType)             {                 case "Badge":                     templateOptions.BadgeGlyphValueContent = Enum.GetNames(typeof( GlyphValue));                     ViewBag.ViewData = templateOptions;                     result = PartialView("_" + templateOptions.NotificationTemplateType);                     break;                 case "Raw":                     ViewBag.ViewData = templateOptions;                     result = PartialView("_Raw");                     break;                 case "Toast":                     templateOptions.TileImages = this.blobClient.GetAllBlobsInContainer(ConfigReader.GetConfigValue("TileImagesContainer")).OrderBy(i => i.FileName).ToList();                     templateOptions.ToastAudioContent = Enum.GetNames(typeof( ToastAudioContent));                     templateOptions.Priorities = Enum.GetNames(typeof( NotificationPriority));                     ViewBag.ViewData = templateOptions;                     result = PartialView("_" + templateOptions.NotificationTemplateType);                     break;                 case "Tile":                     templateOptions.TileImages = this.blobClient.GetAllBlobsInContainer(ConfigReader.GetConfigValue("TileImagesContainer")).OrderBy(i => i.FileName).ToList();                     ViewBag.ViewData = templateOptions;                     result = PartialView("_" + templateOptions.NotificationTemplateType);                     break;             }             return result;         } Investigated these types: ToastAudioContent – an enum of different Win8 sound effects for toast notifications GlyphValue – an enum of different Win8 icons for badge notifications · Infrastructure\NotificationTemplateModelBinder.cs WNS Namespace references     using NotificationsExtensions.BadgeContent;     using NotificationsExtensions.RawContent;     using NotificationsExtensions.TileContent;     using NotificationsExtensions.ToastContent; Various NotificationFactory derived types can server as bindable models in MVC for creating INotificationContent types. Default values are also set for IWideTileNotificationContent & IToastNotificationContent. Type factoryType = null;             switch (notificationType)             {                 case "Badge":                     factoryType = typeof(BadgeContentFactory);                     break;                 case "Tile":                     factoryType = typeof(TileContentFactory);                     break;                 case "Toast":                     factoryType = typeof(ToastContentFactory);                     break;                 case "Raw":                     factoryType = typeof(RawContentFactory);                     break;             } Investigated these types: BadgeContentFactory – CreateBadgeGlyph, CreateBadgeNumeric (???) TileContentFactory – many notification content creation methods , apparently one for every tile layout type ToastContentFactory – many notification content creation methods , apparently one for every toast layout type RawContentFactory – passing strings WorkerRole WNS Namespace references using Notifications; using Notifications.WNS; using Windows.Samples.Notifications; OnStart() Method – on Worker Role startup, initialize the NotificationJobSerializer, the CloudQueue, and the WNSNotificationJobProcessor _notificationJobSerializer = new NotificationJobSerializer(); _cloudQueueClient = this.account.CreateCloudQueueClient(); _pushNotificationRequestsQueue = _cloudQueueClient.GetQueueReference(ConfigReader.GetConfigValue("RequestQueueName")); _processor = new WNSNotificationJobProcessor(_notificationJobSerializer, _pushNotificationRequestsQueue); Run() Method – poll the Azure Queue for NotificationJobRequest messages & process them:   while (true)             { Trace.WriteLine("Checking for Messages", "Information"); try                 { Parallel.ForEach( this.pushNotificationRequestsQueue.GetMessages(this.batchSize), this.processor.ProcessJobMessageRequest);                 } catch (Exception e)                 { Trace.WriteLine(e.ToString(), "Error");                 } Trace.WriteLine(string.Format("Sleeping for {0} seconds", this.pollIntervalMiliseconds / 1000)); Thread.Sleep(this.pollIntervalMiliseconds);                                            } How I learned to appreciate Win8 There is really only one application architecture for Windows 8 apps: Metro client side and Azure backend – and that is a good thing. With WNS, tier integration is so automated that you don’t even have to leverage a HTTP push API such as SignalR. This is a pretty powerful development paradigm, and has changed the way I look at Windows 8 for RAD business apps. When I originally looked at Win8 and the WinRT API, my first opinion on Win8 dev was as follows – GOOD:WinRT, WRL, C++/CX, WinJS, XAML (& ease of Direct3D integration); BAD: low projected market penetration,.NET lobotomized (Only 8% of .NET 4.5 classes can be used in Win8 non-desktop apps - http://bit.ly/HRuJr7); UGLY:Metro pascal tiles! Perhaps my 80s teenage years gave me a punk reactionary sense of revulsion towards the Partridge Family 70s style that Metro UX seems to have appropriated: On second thought though, it simplifies UI dev to a single paradigm (although UX guys will need to change career) – you will not find an easier app dev environment. Speculation: If LightSwitch is going to support HTML5 client app generation, then its a safe guess to say that vnext will support Win8 Metro XAML - a much easier port from Silverlight XAML. Given the VS2012 LightSwitch integration as a thumbs up from the powers that be at MS, and given that Win8 C#/XAML Metro apps tend towards a streamlined 'golden straight-jacket' cookie cutter app dev style with an Azure back-end supporting Win8 push notifications... --> its easy to extrapolate than LightSwitch vnext could well be the Win8 Metro XAML to Azure RAD tool of choice! The hook is already there - :) Why else have the space next to the HTML Client box? This high level of application development abstraction will facilitate rapid app cookie-cutter architecture-infrastructure frameworks for wrapping any app. This will allow me to avoid too much XAML code-monkeying around & focus on my area of interest: Technical Computing.

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• OIM 11g : Multi-thread approach for writing custom scheduled job

  - by Saravanan V S

  In this post I have shared my experience of designing and developing an OIM schedule job that uses multi threaded approach for updating data in OIM using APIs.  I have used thread pool (in particular fixed thread pool) pattern in developing the OIM schedule job. The thread pooling pattern has noted advantages compared to thread per task approach. I have listed few of the advantage here ·         Threads are reused ·         Creation and tear-down cost of thread is reduced ·         Task execution latency is reduced ·         Improved performance ·         Controlled and efficient management of memory and resources used by threads More about java thread pool http://docs.oracle.com/javase/tutorial/essential/concurrency/pools.html The following diagram depicts the high-level architectural diagram of the schedule job that process input from a flat file to update OIM process form data using fixed thread pool approach    The custom scheduled job shared in this post is developed to meet following requirement 1)      Need to process a CSV extract that contains identity, account identifying key and list of data to be updated on an existing OIM resource account. 2)      CSV file can contain data for multiple resources configured in OIM 3)      List of attribute to update and mapping between CSV column to OIM fields may vary between resources The following are three Java class developed for this requirement (I have given only prototype of the code that explains how to use thread pools in schedule task) CustomScheduler.java - Implementation of TaskSupport class that reads and passes the parameters configured on the schedule job to Thread Executor class. package com.oracle.oim.scheduler; import java.util.HashMap; import com.oracle.oim.bo.MultiThreadDataRecon; import oracle.iam.scheduler.vo.TaskSupport; public class CustomScheduler extends TaskSupport {      public void execute(HashMap options) throws Exception {             /*  Read Schedule Job Parameters */             String param1 = (String) options.get(“Parameter1”);             .             int noOfThread = (int) options.get(“No of Threads”);             .             String paramn = (int) options.get(“ParamterN”); /* Provide all the required input configured on schedule job to Thread Pool Executor implementation class like 1) Name of the file, 2) Delimiter 3) Header Row Numer 4) Line Escape character 5) Config and resource map lookup 6) No the thread to create */ new MultiThreadDataRecon(all_required_parameters, noOfThreads).reconcile();       }       public HashMap getAttributes() { return null; }       public void setAttributes() {       } } MultiThreadDataRecon.java – Helper class that reads data from input file, initialize the thread executor and builds the task queue. package com.oracle.oim.bo; import <required file IO classes>; import  <required java.util classes>; import  <required OIM API classes>; import <csv reader api>; public class MultiThreadDataRecon {  private int noOfThreads;  private ExecutorService threadExecutor = null;  public MetaDataRecon(<required params>, int noOfThreads)  {       //Store parameters locally       .       .       this.noOfThread = noOfThread;  }        /**        *  Initialize         */  private void init() throws Exception {       try {             // Initialize CSV file reader API objects             // Initialize OIM API objects             /* Initialize Fixed Thread Pool Executor class if no of threads                 configured is more than 1 */             if (noOfThreads > 1) {                   threadExecutor = Executors.newFixedThreadPool(noOfThreads);             } else {                   threadExecutor = Executors.newSingleThreadExecutor();             }             /* Initialize TaskProcess clas s which will be executing task                 from the Queue */                TaskProcessor.initializeConfig(params);       } catch (***Exception e) {                   // TO DO       }  }       /**        *  Method to reconcile data from CSV to OIM        */ public void reconcile() throws Exception {        try {             init();             while(<csv file has line>){                   processRow(line);             }             /* Initiate thread shutdown */             threadExecutor.shutdown();             while (!threadExecutor.isTerminated()) {                 // Wait for all task to complete.             }            } catch (Exception e) {                   // TO DO            } finally {                   try {                         //Close all the file handles                   } catch (IOException e) {                         //TO DO                   }             }       }       /**        * Method to process         */       private void processRow(String row) {             // Create task processor instance with the row data              // Following code push the task to work queue and wait for next                available thread to execute             threadExecutor.execute(new TaskProcessor(rowData));       } } TaskProcessor.java – Implementation of “Runnable” interface that executes the required business logic to update data in OIM. package com.oracle.oim.bo; import <required APIs> class TaskProcessor implements Runnable {       //Initialize required member variables       /**        * Constructor        */       public TaskProcessor(<row data>) {             // Initialize and parse csv row       }       /*       *  Method to initialize required object for task execution       */       public static void initializeConfig(<params>) {             // Process param and initialize the required configs and object       }           /*        * (non-Javadoc)        *         * @see java.lang.Runnable#run()        */            public void run() {             if (<is csv data valid>){                   processData();             }       }  /**   * Process the the received CSV input   */  private void processData() {     try{       //Find the user in OIM using the identity matching key value from CSV       // Find the account to be update from user’s account based on account identifying key on CSV       // Update the account with data from CSV       }catch(***Exception e){           //TO DO       }   } }

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• Un-failing over a Cisco PIX 515e

  - by ABrown

  We had a power outage at our data center last week and when our dual PIX 515E running IOS 7.0(8) (configured with a failover cable) came back, they were in a failed over state where the Secondary unit is active and the Primary unit is standby I have tried 'failover reset', 'failover active', and 'failover reload-standby' as well as executing reloads on both units in a variety of orders, and they don't come back Primary/Active Secondary/Standby. The only thing in my arsenal that I haven't tried is driving to the data center and performing a hard reboot, which I hate to do. I have read How Failover Works on the Cisco Secure Firewall and it seems like this should be wicked straight forward. output of show failover on Primary: Failover On Cable status: Normal Failover unit Primary Failover LAN Interface: N/A - Serial-based failover enabled Unit Poll frequency 15 seconds, holdtime 45 seconds Interface Poll frequency 15 seconds Interface Policy 1 Monitored Interfaces 2 of 250 maximum Version: Ours 7.0(8), Mate 7.0(8) Last Failover at: 02:52:05 UTC Mar 10 2010 This host: Primary - Standby Ready Active time: 0 (sec) Interface outside (x.x.x.165): Normal Interface inside (y.y.y.3): Normal Other host: Secondary - Active Active time: 897045 (sec) Interface outside (x.x.x.164): Normal Interface inside (y.y.y.4): Normal Stateful Failover Logical Update Statistics Link : Unconfigured. output of show failover on Secondary: Failover On Cable status: Normal Failover unit Secondary Failover LAN Interface: N/A - Serial-based failover enabled Unit Poll frequency 15 seconds, holdtime 45 seconds Interface Poll frequency 15 seconds Interface Policy 1 Monitored Interfaces 2 of 250 maximum Version: Ours 7.0(8), Mate 7.0(8) Last Failover at: 02:03:04 UTC Feb 28 2010 This host: Secondary - Active Active time: 896925 (sec) Interface outside (x.x.x.164): Normal Interface inside (y.y.y.4): Normal Other host: Primary - Standby Ready Active time: 0 (sec) Interface outside (x.x.x.165): Normal Interface inside (y.y.y.3): Normal Stateful Failover Logical Update Statistics Link : Unconfigured. I'm seeing the following in my syslog: Mar 10 03:05:00 fw1 %PIX-5-111008: User 'enable_15' executed the 'failover reset' command. Mar 10 03:05:09 fw1 %PIX-5-111008: User 'enable_15' executed the 'failover reload-standby' command. Mar 10 03:05:12 fw1 %PIX-6-720032: (VPN-Secondary) HA status callback: id=3,seq=200,grp=0,event=406,op=20,my=Active,peer=Failed. Mar 10 03:05:12 fw1 %PIX-6-720028: (VPN-Secondary) HA status callback: Peer state Failed. Mar 10 03:06:09 fw1 %PIX-6-720032: (VPN-Secondary) HA status callback: id=3,seq=200,grp=0,event=401,op=0,my=Active,peer=Failed. Mar 10 03:06:09 fw1 %PIX-6-720024: (VPN-Secondary) HA status callback: Control channel is down. Mar 10 03:06:09 fw1 %PIX-6-720032: (VPN-Secondary) HA status callback: id=3,seq=200,grp=0,event=401,op=1,my=Active,peer=Failed. Mar 10 03:06:10 fw1 %PIX-6-720024: (VPN-Secondary) HA status callback: Control channel is up. Mar 10 03:06:10 fw1 %PIX-6-720032: (VPN-Secondary) HA status callback: id=3,seq=200,grp=0,event=411,op=2,my=Active,peer=Failed. Mar 10 03:06:23 fw1 %PIX-6-720032: (VPN-Secondary) HA status callback: id=3,seq=200,grp=0,event=406,op=80,my=Active,peer=Standby Ready. Mar 10 03:06:23 fw1 %PIX-6-720028: (VPN-Secondary) HA status callback: Peer state Standby Ready. Mar 10 03:06:24 fw2 %PIX-6-720027: (VPN-Primary) HA status callback: My state Standby Ready. Mar 10 03:07:05 fw1 %PIX-5-111008: User 'enable_15' executed the 'failover reset' command. Mar 10 03:07:31 fw1 %PIX-5-111008: User 'enable_15' executed the 'failover active' command. Mar 10 03:08:04 fw1 %PIX-5-611103: User logged out: Uname: enable_1 Mar 10 03:08:04 fw1 %PIX-6-315011: SSH session from admin1_int on interface inside for user "pix" terminated normally Mar 10 03:08:39 fw1 %PIX-6-720032: (VPN-Secondary) HA status callback: id=3,seq=200,grp=0,event=406,op=20,my=Active,peer=Failed. Mar 10 03:08:39 fw1 %PIX-6-720028: (VPN-Secondary) HA status callback: Peer state Failed. Mar 10 03:09:10 fw1 %PIX-6-605005: Login permitted from admin1_int/36891 to inside:192.168.4.4/ssh for user "pix" Mar 10 03:09:23 fw1 %PIX-5-111008: User 'enable_15' executed the 'failover reset' command. Mar 10 03:09:38 fw1 %PIX-6-720032: (VPN-Secondary) HA status callback: id=3,seq=200,grp=0,event=401,op=0,my=Active,peer=Failed. Mar 10 03:09:39 fw1 %PIX-6-720024: (VPN-Secondary) HA status callback: Control channel is down. Mar 10 03:09:39 fw1 %PIX-6-720032: (VPN-Secondary) HA status callback: id=3,seq=200,grp=0,event=401,op=1,my=Active,peer=Failed. Mar 10 03:09:39 fw1 %PIX-6-720024: (VPN-Secondary) HA status callback: Control channel is up. Mar 10 03:09:39 fw1 %PIX-6-720032: (VPN-Secondary) HA status callback: id=3,seq=200,grp=0,event=411,op=2,my=Active,peer=Failed. Mar 10 03:09:52 fw1 %PIX-6-720032: (VPN-Secondary) HA status callback: id=3,seq=200,grp=0,event=406,op=80,my=Active,peer=Standby Ready. Mar 10 03:09:52 fw1 %PIX-6-720028: (VPN-Secondary) HA status callback: Peer state Standby Ready. Mar 10 03:09:53 fw2 %PIX-6-720027: (VPN-Primary) HA status callback: My state Standby Ready. I'm not exactly sure how to interpret that syslog data. Primary doesn't seem to even try to become Active. When I reload the individual units separately, my connections are retained, so it doesn't seem like I have a real hardware failure. Is there something I can query (IOS or SNMP) to check for hardware issues? Any thoughts? My IOS-fu is weak. Thanks for any help you might provide, Aaron

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• Howto WCF Service HTTPS Binding and Endpoint Configuration in IIS with Load Balancer?

  - by Mike G

  We have a WCF service that is being hosted on a set of 12 machines. There is a load balancer that is a gateway to these machines. Now the site is setup as SSL; as in a user accesses it through using an URL with https. I know this much, the URL that addresses the site is https, but none of the servers has a https binding or is setup to require SSL. This leads me to believe that the load balancer handles the https and the connection from the balancer to the servers are unencrypted (this takes place behind the firewall so no biggie there). The problem we're having is that when a Silverlight client tries to access a WCF service it is getting a "Not Found" error. I've set up a test site along with our developer machines and have made sure that the bindings and endpoints in the web.config work with the client. It seems to be the case in the production environment that we get this error. Is there anything wrong with the following web.config? Should we be setting up how https is handled in a different manner? We're at a loss on this currently since I've tried every programmatic solution with endpoints and bindings. None of the solutions I have found deal with a load balancer in the manner we're dealing. Web.config service model info: <system.serviceModel> <behaviors> <serviceBehaviors> <behavior name="TradePMR.OMS.Framework.Services.CRM.CRMServiceBehavior"> <serviceMetadata httpsGetEnabled="true" /> <serviceDebug includeExceptionDetailInFaults="false" /> </behavior> <behavior name="TradePMR.OMS.Framework.Services.AccountAggregation.AccountAggregationBehavior"> <serviceMetadata httpsGetEnabled="true" /> <serviceDebug includeExceptionDetailInFaults="false" /> </behavior> </serviceBehaviors> </behaviors> <bindings> <customBinding> <binding name="SecureCRMCustomBinding"> <binaryMessageEncoding /> <httpsTransport /> </binding> <binding name="SecureAACustomBinding"> <binaryMessageEncoding /> <httpsTransport /> </binding> </customBinding> <mexHttpsBinding> <binding name="SecureMex" /> </mexHttpsBinding> </bindings> <serviceHostingEnvironment aspNetCompatibilityEnabled="true" /> <!--Defines the services to be used in the application--> <services> <service behaviorConfiguration="TradePMR.OMS.Framework.Services.CRM.CRMServiceBehavior" name="TradePMR.OMS.Framework.Services.CRM.CRMService"> <endpoint address="" binding="customBinding" bindingConfiguration="SecureCRMCustomBinding" contract="TradePMR.OMS.Framework.Services.CRM.CRMService" name="SecureCRMEndpoint" /> <!--This is required in order to be able to use the "Update Service Reference" in the Silverlight application--> <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" /> </service> <service behaviorConfiguration="TradePMR.OMS.Framework.Services.AccountAggregation.AccountAggregationBehavior" name="TradePMR.OMS.Framework.Services.AccountAggregation.AccountAggregation"> <endpoint address="" binding="customBinding" bindingConfiguration="SecureAACustomBinding" contract="TradePMR.OMS.Framework.Services.AccountAggregation.AccountAggregation" name="SecureAAEndpoint" /> <!--This is required in order to be able to use the "Update Service Reference" in the Silverlight application--> <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" /> </service> </services> </system.serviceModel> </configuration> The ServiceReferences.ClientConfig looks like this: <configuration> <system.serviceModel> <bindings> <customBinding> <binding name="StandardAAEndpoint"> <binaryMessageEncoding /> <httpTransport maxReceivedMessageSize="2147483647" maxBufferSize="2147483647" /> </binding> <binding name="SecureAAEndpoint"> <binaryMessageEncoding /> <httpsTransport maxReceivedMessageSize="2147483647" maxBufferSize="2147483647" /> </binding> <binding name="StandardCRMEndpoint"> <binaryMessageEncoding /> <httpTransport maxReceivedMessageSize="2147483647" maxBufferSize="2147483647" /> </binding> <binding name="SecureCRMEndpoint"> <binaryMessageEncoding /> <httpsTransport maxReceivedMessageSize="2147483647" maxBufferSize="2147483647" /> </binding> </customBinding> </bindings> <client> <endpoint address="https://Service2.svc" binding="customBinding" bindingConfiguration="SecureAAEndpoint" contract="AccountAggregationService.AccountAggregation" name="SecureAAEndpoint" /> <endpoint address="https://Service1.svc" binding="customBinding" bindingConfiguration="SecureCRMEndpoint" contract="CRMService.CRMService" name="SecureCRMEndpoint" /> </client> </system.serviceModel> </configuration> (The addresses are of no consequence since those are dynamically built so that they will point to a dev's machine or to the production server)

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• Why are 32-bit application pools more efficient in IIS? [closed]

  - by mhenry1384

  I've been running load tests with two different ASP.NET web applications in IIS. The tests are run with 5,10,25, and 250 user agents. Tested on a box with 8 GB RAM, Windows 7 Ultimate x64. The same box running both IIS and the load test project. I did many runs, and the data is very consistent. For every load, I see a lower "Avg. Page Time (sec)" and a lower "Avg. Response Time (sec)" if I have "Enable 32-bit Applications" set to True in the Application Pools. The difference gets more pronounced the higher the load. At very high loads, the web applications start to throw errors (503) if the application pools are 64-bit, but they can can keep up if set to 32-bit. Why are 32-bit app pools so much more efficient? Why isn't the default for application pools 32-bit?

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• What is the data transfer speeds within the disk, to other devices?

  - by Kumar

  I use Debian 6 on a HP Elitbook 6930 with 2Gigs of RAM. I was copying two AVI files, 1.5 GB in total, and noticed that the data copying was done at the rate of 4MB/sec. When I copy same AVIs to my Western Digital Passport 25G USB plugin drive the data transfer speed is 11+MB/sec. This speed is different if I plugin the drive to different USB ports. Interestingly, at work I also downloaded a 16MB IE8 exe on my virtual xp, run inside Oracle Sun Virtual Box, and it was downloaded AND saved within a second. We have a high speed network at work. :-) Why and how this difference in data speeds is possible?

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• Nginx Fastcgi performance issues

  - by Barry

  I am running several fastcgi servers behind Nginx. I run 3 Nginx workers and 6 fastcgi servers as upstream backends. When I run load tests of 1 req per sec, I can clearly see that on avarage a reply is 0.1sec, but from time to time there are 3.1 sec responses. It is a suspiciously deterministic number and it happens even at very small loads from time to time. Both CPU and Memory are of no issue at all. Any idea where this delay may be comming from? Any suggestions how to debug this? Many thanks, Barry.

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• How To Change What Version of PHP Apache2 Uses?

  - by nicorellius

  I just discovered that I am using the wrong version of PHP for a CRM application. Once I figured out how to make a simple phpinfo() script to tell me what Apache2 is using, I tried changing the php.ini such that my webserver would use the PHP I want. Well, this is my problem. Not sure how to do that. I compiled the version of PHP I want to /etc here: /etc/php-5.2.8/ Inside this, there was a php.ini-recommended file that I made some changes to and renamed to php.ini so PHP would use it. But when I opened my browser and cleared my history and went to the http://localhost<CRM dir>/install.php address, the wizard still says I'm not usign the correct version of PHP. Based on this post what do I have to do to change the version of PHP that shows up after I run my test.php script? In other words, phpinfo() says I'm running PHP 5.3.2, but I want to change it to my compiled 5.2.8 version located in /etc.

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• Thinking Sphinx index rebuild error on windows xp: searchd is already running

  - by Voldy

  I have Sphinx installed on windows xp system. A I use Thinking Sphinx plug-in within my rails application. I can't rebuild index with Thinking Sphinx rake task after application server starting up even if I stop it: Stopped search daemon (pid 4492). ... bla bla bla ... total 3 reads, 0.000 sec, 1.3 kb/call avg, 0.0 msec/call avg total 9 writes, 0.000 sec, 1.2 kb/call avg, 0.0 msec/call avg WARNING: could not open pipe (GetLastError()=2) rake aborted! searchd is already running. If I reload system, I can rebuild index. What do you think about? p.s: Does this question suited for serverfault.com?

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• IP failover with 2 nodes on different subnet: cannot ping virtual IP from second node?

  - by quanta

  I'm going to setup redundant failover Redmine: another instance was installed on the second server without problem MySQL (running on the same machine with Redmine) was configured as master-master replication Because they are in different subnet (192.168.3.x and 192.168.6.x), it seems that VIPArip is the only choice. /etc/ha.d/ha.cf on node1 logfacility none debug 1 debugfile /var/log/ha-debug logfile /var/log/ha-log autojoin none warntime 3 deadtime 6 initdead 60 udpport 694 ucast eth1 node2.ip keepalive 1 node node1 node node2 crm respawn /etc/ha.d/ha.cf on node2: logfacility none debug 1 debugfile /var/log/ha-debug logfile /var/log/ha-log autojoin none warntime 3 deadtime 6 initdead 60 udpport 694 ucast eth0 node1.ip keepalive 1 node node1 node node2 crm respawn crm configure show: node $id="6c27077e-d718-4c82-b307-7dccaa027a72" node1 node $id="740d0726-e91d-40ed-9dc0-2368214a1f56" node2 primitive VIPArip ocf:heartbeat:VIPArip \ params ip="192.168.6.8" nic="lo:0" \ op start interval="0" timeout="20s" \ op monitor interval="5s" timeout="20s" depth="0" \ op stop interval="0" timeout="20s" \ meta is-managed="true" property $id="cib-bootstrap-options" \ stonith-enabled="false" \ dc-version="1.0.12-unknown" \ cluster-infrastructure="Heartbeat" \ last-lrm-refresh="1338870303" crm_mon -1: ============ Last updated: Tue Jun 5 18:36:42 2012 Stack: Heartbeat Current DC: node2 (740d0726-e91d-40ed-9dc0-2368214a1f56) - partition with quorum Version: 1.0.12-unknown 2 Nodes configured, unknown expected votes 1 Resources configured. ============ Online: [ node1 node2 ] VIPArip (ocf::heartbeat:VIPArip): Started node1 ip addr show lo: 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet 192.168.6.8/32 scope global lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever I can ping 192.168.6.8 from node1 (192.168.3.x): # ping -c 4 192.168.6.8 PING 192.168.6.8 (192.168.6.8) 56(84) bytes of data. 64 bytes from 192.168.6.8: icmp_seq=1 ttl=64 time=0.062 ms 64 bytes from 192.168.6.8: icmp_seq=2 ttl=64 time=0.046 ms 64 bytes from 192.168.6.8: icmp_seq=3 ttl=64 time=0.059 ms 64 bytes from 192.168.6.8: icmp_seq=4 ttl=64 time=0.071 ms --- 192.168.6.8 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3000ms rtt min/avg/max/mdev = 0.046/0.059/0.071/0.011 ms but cannot ping virtual IP from node2 (192.168.6.x) and outside. Did I miss something? PS: you probably want to set IP2UTIL=/sbin/ip in the /usr/lib/ocf/resource.d/heartbeat/VIPArip resource agent script if you get something like this: Jun 5 11:08:10 node1 lrmd: [19832]: info: RA output: (VIPArip:stop:stderr) 2012/06/05_11:08:10 ERROR: Invalid OCF_RESK EY_ip [192.168.6.8] http://www.clusterlabs.org/wiki/Debugging_Resource_Failures Reply to @DukeLion: Which router receives RIP updates? When I start the VIPArip resource, ripd was run with below configuration file (on node1): /var/run/resource-agents/VIPArip-ripd.conf: hostname ripd password zebra debug rip events debug rip packet debug rip zebra log file /var/log/quagga/quagga.log router rip !nic_tag no passive-interface lo:0 network lo:0 distribute-list private out lo:0 distribute-list private in lo:0 !metric_tag redistribute connected metric 3 !ip_tag access-list private permit 192.168.6.8/32 access-list private deny any

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• I/O Error with PHP5-FPM, ptrace(PEEKDATA) failed

  - by MultiformeIngegno

  I got a lot of these: [NOTICE] child 19214 stopped for tracing [NOTICE] about to trace 19214 [ERROR] ptrace(PEEKDATA) failed: Input/output error (5) [NOTICE] finished trace of 19214 [WARNING] [pool www] child 19208, script 'blahblah.php' executing too slow (30.041419 sec), logging [NOTICE] child 19208 stopped for tracing [NOTICE] about to trace 19208 [ERROR] ptrace(PEEKDATA) failed: Input/output error (5) [NOTICE] finished trace of 19208 [WARNING] [pool www] child 19218, script 'blahblah.php' executing too slow (30.035029 sec), logging And when php reaches max children (at least I presume that's the case) it stops "working"... now I know I can increase max_children (currently set to 9) but there's a way to stop php from "dying"? I'm on a VPS with 1 core and 512 MB of RAM (PHP5-FPM 5.4.4 + APC 3.1.10).

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