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• Windows Server 2008 Task Scheduler Tasks Not Executing

  - by omatase

  I've been having an intermittent problem for some time now with the Windows Task Scheduler that I can't work out. I use the task scheduler to run a C# app I've written that has various plugins used to ensure production systems are working. This task scheduler itself is actually a production system so I have one simple task that executes every 8 minutes to notify an external monitoring system that the task scheduler is still up. If this external service fails to receive an "all-clear" at least once every 15 minutes (or so I don't remember the exact number right now) it will message us that the monitoring system is down. In the past we've had intermittent "down" messages from time to time and each time I've investigated the cause I was unable to find any problems. So this time I wanted to ask the StackOverflow community since it doesn't look like I'll have luck on my own. This morning at 2:32 AM the task fired (exactly 8 minutes after the previous firing) however the task didn't fire again until 3:28. There are no errors that I can see in the Event Viewer at this time. When I look at the Task Scheduler log there are no errors there either. Here is what the log looks like though: Information 6/11/2011 3:28:56 AM 102 Task completed (2) d6cf2412-269e-48bf-9f40-4a863347baad Information 6/11/2011 3:28:56 AM 201 Action completed (2) d6cf2412-269e-48bf-9f40-4a863347baad Information 6/11/2011 3:28:55 AM 129 Created Task Process Info Information 6/11/2011 3:28:55 AM 200 Action started (1) d6cf2412-269e-48bf-9f40-4a863347baad Information 6/11/2011 3:28:55 AM 100 Task Started (1) d6cf2412-269e-48bf-9f40-4a863347baad Information 6/11/2011 3:28:55 AM 319 Task Engine received message to start task (1) Information 6/11/2011 3:28:55 AM 107 Task triggered on scheduler Info d6cf2412-269e-48bf-9f40-4a863347baad Information 6/11/2011 3:28:15 AM 102 Task completed (2) b91fe5ce-39ef-42fb-adbe-bd8be012c00a Information 6/11/2011 3:28:15 AM 201 Action completed (2) b91fe5ce-39ef-42fb-adbe-bd8be012c00a Information 6/11/2011 3:28:15 AM 102 Task completed (2) 556c07dc-2724-4a21-a97e-dc4abd56f94d Information 6/11/2011 3:28:15 AM 201 Action completed (2) 556c07dc-2724-4a21-a97e-dc4abd56f94d Information 6/11/2011 3:28:15 AM 102 Task completed (2) 79328289-f742-49dd-aa0d-c3d05db50895 Information 6/11/2011 3:28:15 AM 201 Action completed (2) 79328289-f742-49dd-aa0d-c3d05db50895 Information 6/11/2011 3:28:15 AM 102 Task completed (2) 19743755-47b6-4b98-9bec-052193be9496 Information 6/11/2011 3:28:15 AM 201 Action completed (2) 19743755-47b6-4b98-9bec-052193be9496 Information 6/11/2011 3:28:15 AM 102 Task completed (2) c165754f-e3e6-4176-a327-11f9c06c39a5 Information 6/11/2011 3:28:15 AM 201 Action completed (2) c165754f-e3e6-4176-a327-11f9c06c39a5 Information 6/11/2011 3:28:15 AM 102 Task completed (2) 0e62ad3e-1f6e-40c0-9155-19f0108dee22 Information 6/11/2011 3:28:15 AM 201 Action completed (2) 0e62ad3e-1f6e-40c0-9155-19f0108dee22 Information 6/11/2011 3:28:10 AM 129 Created Task Process Info Information 6/11/2011 3:28:10 AM 200 Action started (1) 0e62ad3e-1f6e-40c0-9155-19f0108dee22 Information 6/11/2011 3:28:10 AM 129 Created Task Process Info Information 6/11/2011 3:28:10 AM 200 Action started (1) c165754f-e3e6-4176-a327-11f9c06c39a5 Information 6/11/2011 3:28:10 AM 129 Created Task Process Info Information 6/11/2011 3:28:10 AM 200 Action started (1) 19743755-47b6-4b98-9bec-052193be9496 Information 6/11/2011 3:28:10 AM 129 Created Task Process Info Information 6/11/2011 3:28:10 AM 200 Action started (1) 79328289-f742-49dd-aa0d-c3d05db50895 Information 6/11/2011 3:28:10 AM 129 Created Task Process Info Information 6/11/2011 3:28:10 AM 200 Action started (1) 556c07dc-2724-4a21-a97e-dc4abd56f94d Information 6/11/2011 3:28:10 AM 129 Created Task Process Info Information 6/11/2011 3:28:10 AM 200 Action started (1) b91fe5ce-39ef-42fb-adbe-bd8be012c00a Information 6/11/2011 3:28:10 AM 100 Task Started (1) 0e62ad3e-1f6e-40c0-9155-19f0108dee22 Information 6/11/2011 3:28:10 AM 319 Task Engine received message to start task (1) Information 6/11/2011 3:28:10 AM 100 Task Started (1) c165754f-e3e6-4176-a327-11f9c06c39a5 Information 6/11/2011 3:28:10 AM 319 Task Engine received message to start task (1) Information 6/11/2011 3:28:10 AM 100 Task Started (1) 19743755-47b6-4b98-9bec-052193be9496 Information 6/11/2011 3:28:10 AM 319 Task Engine received message to start task (1) Information 6/11/2011 3:28:10 AM 100 Task Started (1) 79328289-f742-49dd-aa0d-c3d05db50895 Information 6/11/2011 3:28:10 AM 319 Task Engine received message to start task (1) Information 6/11/2011 3:28:10 AM 100 Task Started (1) 556c07dc-2724-4a21-a97e-dc4abd56f94d Information 6/11/2011 3:28:10 AM 319 Task Engine received message to start task (1) Information 6/11/2011 3:28:10 AM 100 Task Started (1) b91fe5ce-39ef-42fb-adbe-bd8be012c00a Information 6/11/2011 3:28:10 AM 319 Task Engine received message to start task (1) Information 6/11/2011 3:28:10 AM 107 Task triggered on scheduler Info 0e62ad3e-1f6e-40c0-9155-19f0108dee22 Information 6/11/2011 3:28:10 AM 107 Task triggered on scheduler Info c165754f-e3e6-4176-a327-11f9c06c39a5 Information 6/11/2011 3:28:10 AM 107 Task triggered on scheduler Info 19743755-47b6-4b98-9bec-052193be9496 Information 6/11/2011 3:28:10 AM 107 Task triggered on scheduler Info 79328289-f742-49dd-aa0d-c3d05db50895 Information 6/11/2011 3:28:10 AM 107 Task triggered on scheduler Info 556c07dc-2724-4a21-a97e-dc4abd56f94d Information 6/11/2011 3:28:10 AM 107 Task triggered on scheduler Info b91fe5ce-39ef-42fb-adbe-bd8be012c00a Information 6/11/2011 2:32:56 AM 102 Task completed (2) 16e4f2c3-a340-410a-9c14-4bfe0861fdd5 Information 6/11/2011 2:32:56 AM 201 Action completed (2) 16e4f2c3-a340-410a-9c14-4bfe0861fdd5 Information 6/11/2011 2:32:55 AM 129 Created Task Process Info Information 6/11/2011 2:32:55 AM 200 Action started (1) 16e4f2c3-a340-410a-9c14-4bfe0861fdd5 Information 6/11/2011 2:32:55 AM 100 Task Started (1) 16e4f2c3-a340-410a-9c14-4bfe0861fdd5 Information 6/11/2011 2:32:55 AM 319 Task Engine received message to start task (1) Information 6/11/2011 2:32:55 AM 107 Task triggered on scheduler Info 16e4f2c3-a340-410a-9c14-4bfe0861fdd5 Seems kind of strange. I also have two other C# apps that run and check something each hour on the hour using task scheduler. If I look at the history for those I can see that they didn't execute at 3 AM either! They all waited until 3:28 to start as well. If I look at "tasks completed" in the Event Viewer it shows that only one task was able to run between the 2:32 AM to 3:28 AM time period. The task was "\Microsoft\Windows\RAC\RACAgent" And here's what it looked like: Information 6/11/2011 3:18:09 AM 102 Task completed (2) 00c53a85-ba20-4666-80db-fbbe2492c0ad Information 6/11/2011 3:18:09 AM 201 Action completed (2) 00c53a85-ba20-4666-80db-fbbe2492c0ad Information 6/11/2011 3:18:08 AM 129 Created Task Process Info Information 6/11/2011 3:18:08 AM 200 Action started (1) 00c53a85-ba20-4666-80db-fbbe2492c0ad Information 6/11/2011 3:18:08 AM 100 Task Started (1) 00c53a85-ba20-4666-80db-fbbe2492c0ad Information 6/11/2011 3:18:08 AM 319 Task Engine received message to start task (1) I appreciate any ideas anyone may have.

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• Understanding Windows 8 Recovery options

  - by stuffe

  Background: I am preparing a PC that I am sending to a relative abroad, who has little or no internet access, and next to no sensible options for getting IT support should anything go wrong. As such I am trying to provide a full set of recovery options such that they are able to reinstall the OS with minimum fuss or assistance if required. The PC is a brand new Acer laptop that came with Windows 7 pre-installed (and an associated recovery partition) and a free upgrade to Windows 8. I have installed Windows 8 from scratch performing a format and clean install from media I burned from the official download. The existing Windows 7 recovery partition is still there, and I can still boot from it. I have created recovery DVDs of that in case it is ever lost. Here are my recovery options so far. I can perform a factory reset of Win 7 via the recovery partition I can perform a factory reset of Win 7 via burned recovery DVDs I can re-install Windows 8 cleanly from a DVD All of these are useful, but not what I want, because the first 2 methods use Win 7, and still fill the machine with crapware, and the latter doesn't provide for any post-install customisation and software installation. So, I am looking to see what other options are available to perform a Windows 8 recovery that will be more than a simple install. I am aware that Win8 comes with some useful refresh tools: Refresh your PC - Re-install Win 8 over the top of your existing installation, recovering from any Windows corruption etc. I can run this from my current install, although it says some files are missing that will be provided by me install or recovery media, which seems to be code for stick your install DVD in, and it starts after I do that - unfortunately for this particular laptop you need to specify a particular WIFI driver or the install bombs out part way through with IRQL errors, and this refresh method skips the part where you can load a driver, so it's no use to me. I think I can fix this by creating a custom recovery image using the recimg.exe command but it takes hours to complete so I haven't tried it yet. Reset your PC - Perform a full install and lose all your files. Again it needs my Install media inserting before it will do anything, but then it provides an error (will include later when I recreate it...) Now, these recovery options look useful (in principal, although both are fail for me) but they rely on having a working system to access the tools, which leads me to the last option, of making a Recovery USB drive. I have made a recovery drive, and it should perform loads of useful things, including copying my WIN7 recovery partition to the drive, providing the above refresh and reset options, providing other troubleshooting options and also the ability to restore from a custom image, only none of them seem to work for me. Creating the Recovery Drive - the option to include my recovery partition is greyed out. The partition exists and works fine, why will it not copy it? Refresh - I imagine this would have the same issues as I described before, but this is moot because when I try it says that the "drive where Windows is installed is locked, please unlock the drive and try again" with no info on what that means and how to do it. Restore - Again, probably pointless as I can just use the DVD, but it also errors: "unable to reset your PC. A required drive partition is missing" System Restore - should let me roll back a bad driver etc as per normal in Windows, only it simply says "To use system restore you must specify which windows installation to restore. Restart this computer, select an operating system, and select system restore" ?!?! System Image Recovery - this seems to be offering to restore from a Windows system image, but this is deprecated in Windows 8, although you can still make one if you use the Windows 7 Backup tools, however the resultant file is too large to put on the USB stick as it's FAT formatted, and would be a massive stack of DVDs anyway. So useless. It would be nice it it would work with the custom recovery image you can use with the refresh command, but there seems no option to do this. Automatic Repair - some diagnostics, which seem useless as it happily tells me it can't fix my problem, even though I have none. Command Prompt - yay, this works! What on earth do I want to use it for... Had any of the above worked, it might be useful, but as any form of install still requires you to have the DVD, and any form of custom recovery image also requires you to have either a massive stack of DVDs or an NTFS formatted backup device in addition to the recovery drive, it sort of ruins the point. It doesn't seem rocket science. I want to create a bootable USB drive that I can refresh Windows over an existing install with, perform a clean reinstall to a bare system, or recovery a customised image with existing apps installed. If anyone can point me in a direction that allows me to make a single recovery drive do these all these things, I would appreciate it. I have a 32Gb USB3 thumb drive that I bought for this very purpose, but it's seems to be fighting to let me do anything useful. At this rate I will be making a DriveImageXML recovery stick and dumping the OS with that, which I know works, but isn't so elegant as using the proper tools..

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• KVM machine does not start ssh, network is started, used to work

  - by lleto

  have been searching an pulling my hear out for the last 6 hours. I have a virtual machine that has been running fine for the last six months. I was happy ssh'ing into it and it was running a database and some small apps. Tonight ssh stopped working, so I decided to reboot the machine. I now have the following situation: virsh list --all states machine as running I can ping the machine and get a reply When I ssh to the machine I see "ssh: connect to host [myserver] port 22: Connection refused" nmap does not show port 22 as open I have tried to: - reboot the machine once more (no luck) - mount the filesystem and check /etc/ssh/sshd.conf (has not changed since working situation) - install virsh console, however this does not seem to work When I mount the fs directly using losetup the strange thing is that file dates seem to be frozen in /var/log/ around the time of the crash. If I look in /var/run/ I can see an sshd.pid, but the time is 6 hours ago (and numerous reboots). My virsh xml looks like this: <domain type='kvm' id='21'> <name>myserver</name> <uuid>09678c8d-a99b-1d18-a7af-88d027cc8f93</uuid> <memory>1048576</memory> <currentMemory>1048576</currentMemory> <vcpu>1</vcpu> <os> <type arch='x86_64' machine='pc-1.0'>hvm</type> <boot dev='hd'/> </os> <features> <acpi/> </features> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/kvm</emulator> <disk type='file' device='disk'> <driver name='qemu' type='raw'/> <source file='/dev/disk01/myserver'/> <target dev='hda' bus='ide'/> <alias name='ide0-0-0'/> <address type='drive' controller='0' bus='0' unit='0'/> </disk> <controller type='ide' index='0'> <alias name='ide0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> </controller> <interface type='bridge'> <mac address='52:54:00:e3:13:86'/> <source bridge='br0'/> <target dev='vnet0'/> <model type='virtio'/> <alias name='net0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> </interface> <serial type='pty'> <source path='/dev/pts/1'/> <target port='0'/> <alias name='serial0'/> </serial> <console type='pty' tty='/dev/pts/1'> <source path='/dev/pts/1'/> <target type='serial' port='0'/> <alias name='serial0'/> </console> <input type='mouse' bus='ps2'/> <graphics type='vnc' port='5900' autoport='yes' listen='127.0.0.1'> <listen type='address' address='127.0.0.1'/> </graphics> <video> <model type='cirrus' vram='9216' heads='1'/> <alias name='video0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> <memballoon model='virtio'> <alias name='balloon0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> </memballoon> </devices> <seclabel type='dynamic' model='apparmor' relabel='yes'> <label>libvirt-09678c8d-a99b-1d18-a7af-88d027cc8f93</label> <imagelabel>libvirt-09678c8d-a99b-1d18-a7af-88d027cc8f93</imagelabel> </seclabel> </domain> I'm sort of lost as to where I can look to get the machine up and running again. On the same instance of kvm I have another server running which is working fine. Both are Ubuntu 12.04. All help is welcome....

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• Remote Desktop Services Gateway Issue

  - by AVandelay05

  Alright fellow techies here's the rundown. I have installed Server 2008 r2 Remote Dekstop Services on a VM in my network. I installed the following RD role services: RD Session Host, Licensing, Connection Broker, Gateway, Web Access. When I set things up originally, the gateway server and RDWeb worked as it should locally. After getting things running locally (remoteserver.domainname.local) I wanted to test things externally. From the outside, I couldn't get things running (meaning I could connect to rdweb access externally, but when I tried to run an app I would get the message "can't connect/find computer"). Here's my setup for external access The VM has every RD Services role services installed on it, meaning it acts as gateway, rd web access, session host, licensing, the whole bit. I made a self-signed certificate on the gateway server (gateway.domainname.net is the cert name). Internally, I have a secondary forward-lookup zone called domainname.net with an A record gateway pointing to the local IP of the gateway server. On our public DNS (domainname.net) I have an A record gateway. This is to access the RDWeb externally. In IIS I have the following authentication settings RDWeb: All disabled except for anonymous authentication Rpc: All disabled except for basic and windows RpcWithCert: All disbled except for windows authentication I have the necessary web access config in our sonicwall tz210 (https and rdp, external ip pointing to local ip of rds server) RAP and CAP have the correct user and computer groups, authentication, and allowed devices After all of this, here's what happens accessing externally. I can login correctly to RDWeb Access (I've tried a bogus login, I can't login to it so that's working properly). I see the Apps for use. I click on an app, click connect, the credential window opens, I put in the correct user creds, it tries to connect to the gateway server, but then the cred window comes back in view. I tried to reach a limit of failed logins, but never reached one, haha. So from the same external client machine I try to connect to the gateway through a Remote Desktop connection. I put in the correct gateway settings in the RD window, try to connect and get the same results as I did in RDWeb access. I checked the event logs on the RD Services machine and saw the following event IDs around the time I tried to login externally: ID 6037 with the message "The program svchost.exe, with the assigned process ID 2168, could not authenticate locally by using the target name host/gateway.domainname.net. The target name used is not valid. A target name should refer to one of the local computer names, for example, the DNS host name. Try a different target name." ID 10 RADWebAccess "RD Web Access was unable to access gateway.domainname.net, which is the server that is specified as running the RemoteApp and Desktop Connection Management service. Ensure that the computer account of the RD Web Access server is a member of the TS Web Access Computers security group on gateway.domainname.net" ID 4625 "An account failed to log on. Subject: Security ID: NULL SID Account Name: - Account Domain: - Logon ID: 0x0 Logon Type: 3 Account For Which Logon Failed: Security ID: NULL SID Account Name: Administrator Account Domain: gateway.domainname.net Failure Information: Failure Reason: Unknown user name or bad password. Status: 0xc000006d Sub Status: 0xc000006a Process Information: Caller Process ID: 0x0 Caller Process Name: - Network Information: Workstation Name: USER-LAPTOP Source Network Address: External IP Source Port: 63125 Detailed Authentication Information: Logon Process: NtLmSsp Authentication Package: NTLM Transited Services: - Package Name (NTLM only): - Key Length: 0 This event is generated when a logon request fails. It is generated on the computer where access was attempted. The Subject fields indicate the account on the local system which requested the logon. This is most commonly a service such as the Server service, or a local process such as Winlogon.exe or Services.exe. The Logon Type field indicates the kind of logon that was requested. The most common types are 2 (interactive) and 3 (network). The Process Information fields indicate which account and process on the system requested the logon. The Network Information fields indicate where a remote logon request originated. Workstation name is not always available and may be left blank in some cases. The authentication information fields provide detailed information about this specific logon request. - Transited services indicate which intermediate services have participated in this logon request. - Package name indicates which sub-protocol was used among the NTLM protocols." I don't think the VM has a null SID. The SID of the VM and it's physical host have different SIDS. I can access the blank page for rpc externally using the external gateway name. It seems like authentication is a problem. Also, is it a problem that the external name of the gateway server doesn't match the local name? The external name (which the cert is based on) is gateway.domainname.net and the internal name is remoteserver.domainname.local. That's the only thing I can think of that would be the problem, but the external name has to be different from the local right? Internally, I ping gateway.domainname.net and it gives me the correct local IP of the server. Now, there isn't an actual computer name in AD, but I don't know how I would achieve that? I hope I've been clear....any help would be appreciated. I think I'm close to achieving this. :)

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• Bluetooth RFCOMM / SDP connection to a RS232 adapter in android

  - by ThePosey

  Hello All, I am trying to use the Bluetooth Chat sample API app that google provides to connect to a bluetooth RS232 adapter hooked up to another device. Here is the app for reference: http://developer.android.com/resources/samples/BluetoothChat/index.html And here is the spec sheet for the RS232 connector just for reference: http://serialio.com/download/Docs/BlueSnap-guide-4.77_Commands.pdf Well the problem is that when I go to connect to the device with: mmSocket.connect(); (BluetoothSocket::connect()) I always get an IOException error thrown by the connect() method. When I do a toString on the exception I get "Service discovery failed". My question is mostly what are the cases that would cause an IOException to get thrown in the connect method? I know those are in the source somewhere but I don't know exactly how the java layer that you write apps in and the C/C++ layer that contains the actual stacks interface. I know that it uses the bluez bluetooth stack which is written in C/C++ but not sure how that ties into the java layer which is what I would think is throwing the exception. Any help on pointing me to where I can try to dissect this issue would be incredible. Also just to note I am able to pair with the RS232 adapter just fine but I am never able to actually connect. Here is the logcat output for more reference: I/ActivityManager( 1018): Displayed activity com.example.android.BluetoothChat/.DeviceListActivity: 326 ms (total 326 ms) E/BluetoothService.cpp( 1018): stopDiscoveryNative: D-Bus error in StopDiscovery: org.bluez.Error.Failed (Invalid discovery session) D/BluetoothChat( 1729): onActivityResult -1 D/BluetoothChatService( 1729): connect to: 00:06:66:03:0C:51 D/BluetoothChatService( 1729): setState() STATE_LISTEN - STATE_CONNECTING E/BluetoothChat( 1729): + ON RESUME + I/BluetoothChat( 1729): MESSAGE_STATE_CHANGE: STATE_CONNECTING I/BluetoothChatService( 1729): BEGIN mConnectThread E/BluetoothService.cpp( 1018): stopDiscoveryNative: D-Bus error in StopDiscovery: org.bluez.Error.Failed (Invalid discovery session) E/BluetoothEventLoop.cpp( 1018): event_filter: Received signal org.bluez.Device:PropertyChanged from /org/bluez/1498/hci0/dev_00_06_66_03_0C_51 I/BluetoothChatService( 1729): CONNECTION FAIL TOSTRING: java.io.IOException: Service discovery failed D/BluetoothChatService( 1729): setState() STATE_CONNECTING - STATE_LISTEN D/BluetoothChatService( 1729): start D/BluetoothChatService( 1729): setState() STATE_LISTEN - STATE_LISTEN I/BluetoothChat( 1729): MESSAGE_STATE_CHANGE: STATE_LISTEN V/BluetoothEventRedirector( 1080): Received android.bleutooth.device.action.UUID I/NotificationService( 1018): enqueueToast pkg=com.example.android.BluetoothChat callback=android.app.ITransientNotification$Stub$Proxy@446327c8 duration=0 I/BluetoothChat( 1729): MESSAGE_STATE_CHANGE: STATE_LISTEN E/BluetoothEventLoop.cpp( 1018): event_filter: Received signal org.bluez.Device:PropertyChanged from /org/bluez/1498/hci0/dev_00_06_66_03_0C_51 V/BluetoothEventRedirector( 1080): Received android.bleutooth.device.action.UUID The device I'm trying to connect to is the 00:06:66:03:0C:51 which I can scan for and apparently pair with just fine. The below is merged from a similar question which was successfully resolved by the selected answer here: How can one connect to an rfcomm device other than another phone in Android? The Android API provides examples of using listenUsingRfcommWithServiceRecord() to set up a socket and createRfcommSocketToServiceRecord() to connect to that socket. I'm trying to connect to an embedded device with a BlueSMiRF Gold chip. My working Python code (using the PyBluez library), which I'd like to port to Android, is as follows: sock = bluetooth.BluetoothSocket(proto=bluetooth.RFCOMM) sock.connect((device_addr, 1)) return sock.makefile() ...so the service to connect to is simply defined as channel 1, without any SDP lookup. As the only documented mechanism I see in the Android API does SDP lookup of a UUID, I'm slightly at a loss. Using "sdptool browse" from my Linux host comes up empty, so I surmise that the chip in question simply lacks SDP support.

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• Stumped by "The remote server returned an error: (403) Forbidden" with WCF Service in https

  - by RJ

  I have a WCF Service that I have boiled down to next to nothing because of this error. It is driving me up the wall. Here's what I have now. A very simple WCF service with one method that returns a string with the value, "test". A very simple Web app that uses the service and puts the value of the string into a label. A web server running IIS 6 on Win 2003 with a SSL certificate. Other WCF services on the same server that work. I publish the WCF service to it's https location I run the web app in debug mode in VS and it works perfectly. I publish the web app to it's https location on the same server the WCF service resides under the same SSL certificate I get, "The remote server returned an error: (403) Forbidden" I have changed almost every setting in IIS as well as the WCF and Web apps to no avail. I have compared setting in the WCF services that work and everything is the same. Below are the setting in the web.config for the WCF Service and the WEB app: It appears the problem has to do with the Web app but I am out of ideas. Any ideas: WCF Service: <system.serviceModel> <bindings> <client /> <services> <service behaviorConfiguration="Ucf.Smtp.Wcf.SmtpServiceBehavior" name="Ucf.Smtp.Wcf.SmtpService"> <host> <baseAddresses> <add baseAddress="https://test.net.ucf.edu/webservices/Smtp/" /> </baseAddresses> </host> <endpoint address="" binding="wsHttpBinding" contract="Ucf.Smtp.Wcf.ISmtpService" bindingConfiguration="SSLBinding"> <identity> <dns value="localhost"/> </identity> </endpoint> <endpoint address="mex" binding="mexHttpsBinding" contract="IMetadataExchange"/> </service> </services> <behaviors> <serviceBehaviors> <behavior name="Ucf.Smtp.Wcf.SmtpServiceBehavior"> <serviceMetadata httpsGetEnabled="true" /> <serviceDebug includeExceptionDetailInFaults="true" httpsHelpPageEnabled="True"/> </behavior> </serviceBehaviors> </behaviors> Web App: <system.serviceModel> <bindings><wsHttpBinding> <binding name="WSHttpBinding_ISmtpService" closeTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:10:00" sendTimeout="00:01:00" bypassProxyOnLocal="false" transactionFlow="false" hostNameComparisonMode="StrongWildcard" maxBufferPoolSize="524288" maxReceivedMessageSize="65536" messageEncoding="Text" textEncoding="utf-8" useDefaultWebProxy="true" allowCookies="false"> <readerQuotas maxDepth="32" maxStringContentLength="8192" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384" /> <reliableSession ordered="true" inactivityTimeout="00:10:00" enabled="false" /> <security mode="Transport"> <transport clientCredentialType="None" proxyCredentialType="None" realm="" /> <message clientCredentialType="Windows" negotiateServiceCredential="true" establishSecurityContext="true" /> </security> </binding> <client> <endpoint address="https://net228.net.ucf.edu/webservices/smtp/SmtpService.svc" binding="wsHttpBinding" bindingConfiguration="WSHttpBinding_ISmtpService" contract="SmtpService.ISmtpService" name="WSHttpBinding_ISmtpService"> <identity> <dns value="localhost" /> </identity> </client> </system.serviceModel>

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• Parsing a JSON Response from a .Net webservice

  - by Maskau

  Just to get this out in the open I am new to JAVA, KSOAP, and JSON. So I'll try to explain this the best I can. A while ago I created a webservice to be consumed by Blackberry Apps that we're built using the plug in for Visual Studio. Now the project I am working on, I want to consume the same webservice for Android devices. For the most part I have the base code for the Android app done and working. Here's my problem: I can successfully call the webservice and get a response. I know from creating the webservice that it sends a JSON response. My problem is trying to parse through the JSON response. I have found a few examples that I have been suiting to my needs however I am hung up on one thing. In the JSON each element is preceeded by "anyType" which is forcing my code to return no results (Ultimately I am binding the data to an ArrayList) Here's what I get if I "getProperty(0).toString()... anyType{Artist=anyType{TrackName=Champagne Supernova;}; Here is the code I am using to parse the JSON Object.... SoapObject gr = (SoapObject)envelope.getResponse(); String ro = gr.getProperty(0).toString(); //Added just to see structure of response Artist_Result.add(gr.toString()); if (ro.startsWith("{")) { JSONObject JSONObj = new JSONObject(ro); Iterator<String> itr = JSONObj.keys(); while (itr.hasNext()) { String key = (String)itr.next(); String value = JSONObj.getString(key); //bundleResult.putString(key, value); Artist_Result.add(value); } } else if (ro.startsWith("[")) { JSONArr = new JSONArray(ro); for (int i = 0; i < JSONArr.length(); i++) { JSONObj = (JSONObject)JSONArr.get(i); //bundleResult.putString(String.valueOf(i), JSONObj.toString()); Artist_Result.add(JSONObj.toString()); } } WebService Code: [WebMethod] [return: System.Xml.Serialization.XmlArrayItemAttribute(typeof(Artist))] public Artist[] GetArtist(string ArtistQuery) { // All the SQL Stuff Here SqlDataReader sReader; sReader = cmd.ExecuteReader(); List<Artist> Artists = new List<Artist>(); while (sReader.Read()) { Artist result = new Artist(); result.TrackName = sReader.GetString(0); Artists.Add(result); } sReader.Close(); sqlConn.Close(); return Artists.ToArray(); } public class Artist { public string TrackName; } Sample of XML Output from a browser: <?xml version="1.0" encoding="utf-8" ?> - <ArrayOfArtist xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://bb.mcrcog.com/"> - <Artist> <TrackName>Champagne Supernova</TrackName> </Artist> - <Artist> <TrackName>Don't Look Back In Anger</TrackName> </Artist> - <Artist> <TrackName>D'you Know What I Mean</TrackName> </Artist> - <Artist> <TrackName>Go Let It Out</TrackName> </Artist> I have a feeling I will need to implement a Class, and Getters/Setters on the Android side. I'm just not sure how to go about doing that. Any help would be greatly appreciated!

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• .NET SerialPort DataReceived event not firing

  - by Klay

  I have a WPF test app for evaluating event-based serial port communication (vs. polling the serial port). The problem is that the DataReceived event doesn't seem to be firing at all. I have a very basic WPF form with a TextBox for user input, a TextBlock for output, and a button to write the input to the serial port. Here's the code: public partial class Window1 : Window { SerialPort port; public Window1() { InitializeComponent(); port = new SerialPort("COM2", 9600, Parity.None, 8, StopBits.One); port.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived); port.Open(); } void port_DataReceived(object sender, SerialDataReceivedEventArgs e) { Debug.Print("receiving!"); string data = port.ReadExisting(); Debug.Print(data); outputText.Text = data; } private void Button_Click(object sender, RoutedEventArgs e) { Debug.Print("sending: " + inputText.Text); port.WriteLine(inputText.Text); } } Now, here are the complicating factors: The laptop I'm working on has no serial ports, so I'm using a piece of software called Virtual Serial Port Emulator to setup a COM2. VSPE has worked admirably in the past, and it's not clear why it would only malfunction with .NET's SerialPort class, but I mention it just in case. When I hit the button on my form to send the data, my Hyperterminal window (connected on COM2) shows that the data is getting through. Yes, I disconnect Hyperterminal when I want to test my form's ability to read the port. I've tried opening the port before wiring up the event. No change. I've read through another post here where someone else is having a similar problem. None of that info has helped me in this case. EDIT: Here's the console version (modified from http://mark.michaelis.net/Blog/TheBasicsOfSystemIOPortsSerialPort.aspx): class Program { static SerialPort port; static void Main(string[] args) { port = new SerialPort("COM2", 9600, Parity.None, 8, StopBits.One); port.DataReceived += new SerialDataReceivedEventHandler(port_DataReceived); port.Open(); string text; do { text = Console.ReadLine(); port.Write(text + "\r\n"); } while (text.ToLower() != "q"); } public static void port_DataReceived(object sender, SerialDataReceivedEventArgs args) { string text = port.ReadExisting(); Console.WriteLine("received: " + text); } } This should eliminate any concern that it's a Threading issue (I think). This doesn't work either. Again, Hyperterminal reports the data sent through the port, but the console app doesn't seem to fire the DataReceived event. EDIT #2: I realized that I had two separate apps that should both send and receive from the serial port, so I decided to try running them simultaneously... If I type into the console app, the WPF app DataReceived event fires, with the expected threading error (which I know how to deal with). If I type into the WPF app, the console app DataReceived event fires, and it echoes the data. I'm guessing the issue is somewhere in my use of the VSPE software, which is set up to treat one serial port as both input and output. And through some weirdness of the SerialPort class, one instance of a serial port can't be both the sender and receiver. Anyway, I think it's solved.

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• DSOFramer closing Excel doc in another window. If unsaved data in file, dsoframer fails to open with

  - by Steve

  I'm using Microsoft's DSOFramer control to allow me to embed an Excel file in my dialog so the user can choose his sheet, then select his range of cells; it's used with an import button on my dialog. The problem is that when I call the DSOFramer's OPEN function, if I have Excel open in another window, it closes the Excel document (but leaves Excel running). If the document it tries to close has unsaved data, I get a dialog boxclosing Excel doc in another window. If unsaved data in file, dsoframer fails to open with a messagebox: "Attempt to access invalid address". I built the source, and stepped through, and its making a call in its CDsoDocObject::CreateFromFile function, calling BindToObject on an object of class IMoniker. The HR is 0x8001010a "The message filter indicated that the application is busy". On that failure, it tries to InstantiateDocObjectServer by classid of CLSID Microsoft Excel Worksheet... this fails with an HRESULT of 0x80040154 "Class not registered". The InstantiateDocObjectServer just calls CoCreateInstance on the classid, first with CLSCTX_LOCAL_SERVER, then (if that fails) with CLSCTX_INPROC_SERVER. I know DSOFramer is a popular sample project for embedding Office apps in various dialogs and forms. I'm hoping someone else has had this problem and might have some insight on how I can solve this. I really don't want it to close any other open Excel documents, and I really don't want it to error-out if it can't close the document due to unsaved data. Update 1: I've tried changing the classid that's passed in to "Excel.Application" (I know that class will resolve), but that didn't work. In CDsoDocObject, it tries to open key "HKEY_CLASSES_ROOT\CLSID{00024500-0000-0000-C000-000000000046}\DocObject", but fails. I've visually confirmed that the key is not present in my registry; The key is present for the guid, but there's no DocObject subkey. It then produces an error message box: "The associated COM server does not support ActiveX document embedding". I get similar (different key, of course) results when I try to use the Excel.Workbook programid. Update 2: I tried starting a 2nd instance of Excel, hoping that my automation would bind to it (being the most recently invoked) instead of the problem Excel instance, but it didn't seem to do that. Results were the same. My problem seems to have boiled down to this: I'm calling the BindToObject on an object of class IMoniker, and receiving 0x8001010A (RPC_E_SERVERCALL_RETRYLATER) "The message filter indicated that the application is busy". I've tried playing with the flags passed to the BindToObject (via the SetBindOptions), but nothing seems to make any difference. Update 3: It first tries to bind using an IMoniker class. If that fails, it calls CoCreateInstance for the clsid as a "fallback" method. This may work for other MS Office objects, but when it's Excel, the class is for the Worksheet. I modified the sample to CoCreateInstance _Application, then got the workbooks, then called the Workbooks::Open for the target file, which returns a Worksheet object. I then returned that pointer and merged back with the original sample code path. All working now.

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• facebook iframe stream.Publish cannot close dialog or skip

  - by fooyee

  am pulling my hair over this :( spent 10 hrs but nothing came out I read this thread http://forum.developers.facebook.com/viewtopic.php?pid=198128 but it didn't help much. I'm running a local dev App Engine server ( localhost:8080 ) iframe app so I have a couple of problems. 1) on safari 4.0.4, the publish story dialog comes up nicely with all images/data/action_links. upon posting a story (or skipping), the dialog goes blank and wouldn't close. 2) I tested the same code on firefox 3.5.8, the dialog comes up with all images/data/action_links, but then the whole thing freezes. Clicking anywhere on the dialog doesn't help at all. If i'm patient enough and click "publish", I have to wait for abt 10 seconds before the dialog says "story is published". then it freezes. (clicking on skip doesn't make a difference). btw, there is no "button clicking effect" : ie: the buttons don't look like they "sink down" upon clicking. I checked the firefox memory using the command "top" on the terminal, it all seems okay, no spike in CPU processes ( i could open other firefox tabs and work on them) My futile attempts at solving the problems... 1) so i thought, hmm could this be because of local dev (localhost) problem? I uploaded the code to the production server, the same thing happens. 2) I tried an older firefox (3.1) and the same problem persisted ( the freezing ) 3) I noticed that i kind of used 2 different FB features ( Connect and XFBML). The Connect Feature I used in the PostStory function. The XFBML feature I used before the tag. So I thought, hmm ... I tried replacing the FB_RequireFeatures["Connect"] feature with FB_RequireFeatures["XFBML"]. nothing changed. I still can't close the story dialog. 4) Is there a possibility that I didn't connect to xd_receiver.htm properly? my xd_receiver.htm is stored in my folder /media/fbconnect in my app.yaml handler: - url: /fbconnect static_dir: media/fbconnect so i thought a connection has to be established with xd_receiver.htm. any way I can test that? here're all the codes: <script type="text/javascript"> //post story function function PostStory() { //init facebook FB_RequireFeatures(["Connect"], function() { FB.Facebook.init('my_app_key', "/fbconnect/xd_receiver.htm"); FB.ensureInit(function() { var message = 'the message'; var attachment = { 'name': 'a simple app to send gifts', 'href': 'http://apps.facebook.com/my_app_name', 'caption': '{*actor*} sent u something', 'description': 'some description', "media": [{ "type": "image", "src": "http://bit.ly/105QYr", "href": "http://bit.ly/105QYr"}] }; //action links can only be seen AFTER the feed is published var action_links = [{ 'text': 'Send him/her a gift back!', 'href': 'http://somelink.com'}]; FB.Connect.streamPublish(message, attachment, action_links, null, "Share the gift with your friends", callback, false, null); }); }); function callback(post_id, exception) { //alert('Wall Post Complete'); } } </script> just before the end of the /body tag, i have this: <script type="text/javascript"> function callFBInit() { FB_RequireFeatures( ["XFBML"], function(){ FB.Facebook.init("my_app_key", "/fbconnect/xd_receiver.htm"); } ); } callFBInit(); btw, my xd_receiver.htm contains: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns=? http://www.w3.org/1999/xhtml? > <head> <title>cross-domain receiver page</title> </head> <body> <script src=?http://static.ak.facebook.com/js/api_lib/v0.4/xdcommreceiver.debug.js? type=? text/javascript? ></script> </body> </html> hope you guys can help out. thx

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• "bad record MAC" SSL error between Java and PortgreSQL

  - by Stéphane Bagnier

  Hello there ! We've got here a problem of random disconnections between our Java apps and our PostgreSQL 8.3 server with a "bad record MAC" SSL error. We run Debian / Lenny on both side. On the client side, we see : 2010-03-09 02:36:27,980 WARN org.hibernate.util.JDBCExceptionReporter.logExceptions(JDBCExceptionReporter.java:100) - SQL Error: 0, SQLState: 08006 2010-03-09 02:36:27,980 ERROR org.hibernate.util.JDBCExceptionReporter.logExceptions(JDBCExceptionReporter.java:101) - An I/O error occured while sending to the backend. 2010-03-09 02:36:27,981 ERROR org.hibernate.transaction.JDBCTransaction.toggleAutoCommit(JDBCTransaction.java:232) - Could not toggle autocommit org.postgresql.util.PSQLException: An I/O error occured while sending to the backend. at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:220) at org.postgresql.jdbc2.AbstractJdbc2Connection.executeTransactionCommand(AbstractJdbc2Connection.java:650) at org.postgresql.jdbc2.AbstractJdbc2Connection.commit(AbstractJdbc2Connection.java:670) at org.postgresql.jdbc2.AbstractJdbc2Connection.setAutoCommit(AbstractJdbc2Connection.java:633) at sun.reflect.GeneratedMethodAccessor5.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.springframework.jdbc.datasource.SingleConnectionDataSource$CloseSuppressingInvocationHandler.invoke(SingleConnectionDataSource.java:336) at $Proxy17.setAutoCommit(Unknown Source) at org.hibernate.transaction.JDBCTransaction.toggleAutoCommit(JDBCTransaction.java:228) at org.hibernate.transaction.JDBCTransaction.rollbackAndResetAutoCommit(JDBCTransaction.java:220) at org.hibernate.transaction.JDBCTransaction.rollback(JDBCTransaction.java:196) at org.hibernate.ejb.TransactionImpl.rollback(TransactionImpl.java:85) at org.springframework.orm.jpa.JpaTransactionManager.doRollback(JpaTransactionManager.java:482) at org.springframework.transaction.support.AbstractPlatformTransactionManager.processRollback(AbstractPlatformTransactionManager.java:823) at org.springframework.transaction.support.AbstractPlatformTransactionManager.rollback(AbstractPlatformTransactionManager.java:800) at org.springframework.transaction.interceptor.TransactionAspectSupport.completeTransactionAfterThrowing(TransactionAspectSupport.java:339) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:635) ... Caused by: javax.net.ssl.SSLException: Connection has been shutdown: javax.net.ssl.SSLException: bad record MAC at com.sun.net.ssl.internal.ssl.SSLSocketImpl.checkEOF(SSLSocketImpl.java:1255) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.checkWrite(SSLSocketImpl.java:1267) at com.sun.net.ssl.internal.ssl.AppOutputStream.write(AppOutputStream.java:43) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123) at org.postgresql.core.PGStream.flush(PGStream.java:508) at org.postgresql.core.v3.QueryExecutorImpl.sendSync(QueryExecutorImpl.java:692) at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:193) ... 22 more Caused by: javax.net.ssl.SSLException: bad record MAC at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Alerts.java:190) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1611) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(SSLSocketImpl.java:1569) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(SSLSocketImpl.java:850) at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readDataRecord(SSLSocketImpl.java:746) at com.sun.net.ssl.internal.ssl.AppInputStream.read(AppInputStream.java:75) at org.postgresql.core.VisibleBufferedInputStream.readMore(VisibleBufferedInputStream.java:135) at org.postgresql.core.VisibleBufferedInputStream.ensureBytes(VisibleBufferedInputStream.java:104) at org.postgresql.core.VisibleBufferedInputStream.read(VisibleBufferedInputStream.java:186) at org.postgresql.core.PGStream.Receive(PGStream.java:445) at org.postgresql.core.PGStream.ReceiveTupleV3(PGStream.java:350) at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1322) at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:194) at org.postgresql.jdbc2.AbstractJdbc2Statement.execute(AbstractJdbc2Statement.java:451) at org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(AbstractJdbc2Statement.java:350) at org.postgresql.jdbc2.AbstractJdbc2Statement.executeQuery(AbstractJdbc2Statement.java:254) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208) at org.hibernate.loader.Loader.getResultSet(Loader.java:1808) at org.hibernate.loader.Loader.doQuery(Loader.java:697) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259) at org.hibernate.loader.Loader.loadCollection(Loader.java:2015) at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:59) at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:587) at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:83) at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1743) at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:366) at org.hibernate.collection.PersistentSet.add(PersistentSet.java:212) ... the cypher suite SSL_RSA_WITH_RC4_128_SHA was used. We tried on the client side : the OpenJDK package the sun JDK package the sun tar package the libbcprov-java package the PostgreSQL driver 8.3 instead of 8.4 On the server side we see : 2010-03-01 08:26:05 CET [18513]: [161833-1] LOG: SSL error: sslv3 alert bad record mac 2010-03-01 08:26:05 CET [18513]: [161834-1] LOG: could not receive data from client: Connection reset by peer 2010-03-01 08:26:05 CET [18513]: [161835-1] LOG: unexpected EOF on client connection the error type seams to be SSL_R_SSLV3_ALERT_BAD_RECORD_MAC. the SSL layer is configured with : ssl_ciphers = 'ALL:!ADH:!LOW:!EXP:!MD5:@STRENGTH' and on the server side we changed the cipher suites to : 'ALL:!SSLv2:!MEDIUM:!AES:!ADH:!LOW:!EXP:!MD5:@STRENGTH' but none of these changes fixed the problem. Suggestions appreciated !

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• Architecture for a business objects / database access layer

  - by gregmac

  For various reasons, we are writing a new business objects/data storage library. One of the requirements of this layer is to separate the logic of the business rules, and the actual data storage layer. It is possible to have multiple data storage layers that implement access to the same object - for example, a main "database" data storage source that implements most objects, and another "ldap" source that implements a User object. In this scenario, User can optionally come from an LDAP source, perhaps with slightly different functionality (eg, not possible to save/update the User object), but otherwise it is used by the application the same way. Another data storage type might be a web service, or an external database. There are two main ways we are looking at implementing this, and me and a co-worker disagree on a fundamental level which is correct. I'd like some advice on which one is the best to use. I'll try to keep my descriptions of each as neutral as possible, as I'm looking for some objective view points here. Business objects are base classes, and data storage objects inherit business objects. Client code deals with data storage objects. In this case, common business rules are inherited by each data storage object, and it is the data storage objects that are directly used by the client code. This has the implication that client code determines which data storage method to use for a given object, because it has to explicitly declare an instance to that type of object. Client code needs to explicitly know connection information for each data storage type it is using. If a data storage layer implements different functionality for a given object, client code explicitly knows about it at compile time because the object looks different. If the data storage method is changed, client code has to be updated. Business objects encapsulate data storage objects. In this case, business objects are directly used by client application. Client application passes along base connection information to business layer. Decision about which data storage method a given object uses is made by business object code. Connection information would be a chunk of data taken from a config file (client app does not really know/care about details of it), which may be a single connection string for a database, or several pieces connection strings for various data storage types. Additional data storage connection types could also be read from another spot - eg, a configuration table in a database that specifies URLs to various web services. The benefit here is that if a new data storage method is added to an existing object, a configuration setting can be set at runtime to determine which method to use, and it is completely transparent to the client applications. Client apps do not need to be modified if data storage method for a given object changes. Business objects are base classes, data source objects inherit from business objects. Client code deals primarily with base classes. This is similar to the first method, but client code declares variables of the base business object types, and Load()/Create()/etc static methods on the business objects return the appropriate data source-typed objects. The architecture of this solution is similar to the first method, but the main difference is the decision about which data storage object to use for a given business object is made by the business layer, not the client code. I know there are already existing ORM libraries that provide some of this functionality, but please discount those for now (there is the possibility that a data storage layer is implemented with one of these ORM libraries) - also note I'm deliberately not telling you what language is being used here, other than that it is strongly typed. I'm looking for some general advice here on which method is better to use (or feel free to suggest something else), and why.

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• Summer Programming Plans

  - by Gabe

  I've wanted to start "hacking" for many months now. But I put it off in favor of school and other things. Now, though, I'm free for the summer and want to learn as much as I can. I have a rough idea of what I want to try my hand at, but need some guidance as to what specifically - and how - I should learn. This is my plan so far: 1) Get good at programming in general. I plan to read up on how to think/work like a programmer. I'm waiting for the Pragmatic Programmer to arrive, which will be the first book I read. Q: What other books/ebooks should I look at? What more can I do here? 2) Learn/Improve at HTML/CSS. My first project will be to make a personal website/blog for myself using HTML and CSS. ----Then I hope to write/design articles like Dustin Curtis. After I finish this (and learn a programming language) I'll try to create user-based a user-focused website. Q: It's my understanding that just trying to design/manage websites is a good way to learn/improve at HTML/CSS. Is that all correct? 3) Try music development. This might be a sort of stretch for stackoverflow, but I'm interested in mixing/making techno songs. (Think Justice, or Daft Punk, or MSTRKRFT.) Q: I have a Mac. Any ideas on how I could start/learn music making? Any programs I should download, for instance? 4) My main goal: Learning a web development language/framework. I'm a year into learning/using C++. But what I really want to do is develop websites and web apps. I've searched online, and there seems to be great debate over which language/framework to learn first (and which is best). I think I've narrowed it down to three: Ruby (Rails), Python (Django), and PHP (?). Q #1: Which should I learn and use first? (Reasons?) Q #2: One reason I was leaning towards PHP is that I'm taking a PHP development course next semester. Learning it now would make that course easy. If PHP was not the answer to Q #1, is it worth learning both? Or, would it be better to just focus on PHP for this summer and next semester, and then transition thereafter to a better language? 5) iPhone/iPad Programming (Maybe). I've a number of simple, useful app ideas that I'd like to eventually get too. I just bought a Mac, as well as a few app development books. Q #1: Am I spreading myself thin trying to learn all of the above, and objective-C? Q #2: How much harder/easier is objective-C compared to the above languages? Also, how easy is it to learn obj-C after learning a web development language (and some C++)? Q #3: Yes or no? Should I go for it, or just keeep with #1-4 for now? Also: If you have any tips on how I should learn (or how you learned to hack), I'm all ears. I'd be especially interested in how you planned out learning: did you just hack whenever you felt like it, or did you "study" the language a few hours a day, or something else? Thanks so much, guys.

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• What would cause ANY .NET application to crash immediately... except a project I create and Debug in

  - by blak3r

  My software recently got deployed to a customer who said that the application was crashing immediately after it started. After some initial debugging, the customer provided me remote access to one of the computers which was unable to run the application. I found that the crash wasn't specific to my application. Any application which depended on the .NET framework crashed immediately. Conveniently, Visual Studio 2008 was installed so I created a quick hello world application on it and clicked Debug. The application worked fine. But, then when I tried to execute the generated binaries in the /bin/Debug/HelloWorld.exe directory outside of visual studio it crashed. List of things i've tried (UPDATED): I checked that "Everyone" has Read&Execute permissions for c:\Windows. To test that the problem was with the .NET Framework (and not my application), I attempted to download Paint .NET on to the computers. The setup frontend crashed in the same manner. Performed a repair of the .NET framework as outlined in http://support.microsoft.com/kb/908077 (Boy was this fun and time consuming). No luck. Installed .NET 3.5 SP1 (before it just had .NET 3.5) Note: my application targets 2.0 so I did this more as a long shot... but i learned in the process that .NET 3.5 SP1 also updates the underlying frameworks. Ran Aaron Stebner's .NET Setup Verification Tool. This tool indicated that .NET was successfully installed. (I forget if i checked all the versions but at least 2.0 worked). Tested some mini hello world applications which were targeted for .NET 2.0 and .NET 3.5 and both crashed in the same way. Tried launching .NET apps via windbg cmd line. Doing this did allow me invoke my simple hello world applications. So, simple .NET hello world works when invoked by windbg or by launching via debug in visual studio... but doesn't if i try to execute it standalone. I created a dump file using WinDbg. It wasn't all that revealing to me. FAULTING_IP: mscorwks!PEImage::GetEntryPointToken+21 79f4ff9d f6401010 test byte ptr [eax+10h],10h EXCEPTION_RECORD: 0012f710 -- (.exr 0x12f710) ExceptionAddress: 79f4ff9d (mscorwks!PEImage::GetEntryPointToken+0x00000021) ExceptionCode: c0000005 (Access violation) ExceptionFlags: 00000000 NumberParameters: 2 Parameter[0]: 00000000 Parameter[1]: 00000010 Attempt to read from address 00000010 FAULTING_THREAD: 00000b44 PROCESS_NAME: MyProcess.exe ERROR_CODE: (NTSTATUS) 0x80000003 - {EXCEPTION} Breakpoint A breakpoint has been reached. EXCEPTION_CODE: (HRESULT) 0x80000003 (2147483651) - One or more arguments are invalid DETOURED_IMAGE: 1 NTGLOBALFLAG: 0 APPLICATION_VERIFIER_FLAGS: 0 MANAGED_STACK: !dumpstack -EE OS Thread Id: 0xb44 (0) Current frame: ChildEBP RetAddr Caller,Callee EXCEPTION_OBJECT: !pe cb10b4 Exception object: 00cb10b4 Exception type: System.ExecutionEngineException Message: <none> InnerException: <none> StackTrace (generated): <none> StackTraceString: <none> HResult: 80131506 MANAGED_OBJECT_NAME: System.ExecutionEngineException CONTEXT: 0012f72c -- (.cxr 0x12f72c) eax=00000000 ebx=00000000 ecx=00000000 edx=0000000e esi=001a1490 edi=00000001 eip=79f4ff9d esp=0012f9f8 ebp=0012fa1c iopl=0 nv up ei pl zr na pe nc cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010246 mscorwks!PEImage::GetEntryPointToken+0x21: 79f4ff9d f6401010 test byte ptr [eax+10h],10h ds:0023:00000010=?? Resetting default scope READ_ADDRESS: 00000010 FOLLOWUP_IP: mscorwks!PEImage::GetEntryPointToken+21 79f4ff9d f6401010 test byte ptr [eax+10h],10h BUGCHECK_STR: APPLICATION_FAULT_NULL_CLASS_PTR_DEREFERENCE_SHUTDOWN PRIMARY_PROBLEM_CLASS: NULL_CLASS_PTR_DEREFERENCE_SHUTDOWN DEFAULT_BUCKET_ID: NULL_CLASS_PTR_DEREFERENCE_SHUTDOWN LAST_CONTROL_TRANSFER: from 79ef02b5 to 79f4ff9d STACK_TEXT: 79f4ff9d mscorwks!PEImage::GetEntryPointToken+0x21 79ef02b5 mscorwks!PEFile::GetEntryPointToken+0xa0 79eefeaf mscorwks!SystemDomain::ExecuteMainMethod+0xd4 79fb9793 mscorwks!ExecuteEXE+0x59 79fb96df mscorwks!_CorExeMain+0x15c 7900b1b3 mscoree!_CorExeMain+0x2c 7c817077 kernel32!BaseProcessStart+0x23 SYMBOL_STACK_INDEX: 0 SYMBOL_NAME: mscorwks!PEImage::GetEntryPointToken+21 FOLLOWUP_NAME: MachineOwner MODULE_NAME: mscorwks IMAGE_NAME: mscorwks.dll DEBUG_FLR_IMAGE_TIMESTAMP: 471ef729 STACK_COMMAND: .cxr 0012F72C ; kb ; dds 12f9f8 ; kb FAILURE_BUCKET_ID: NULL_CLASS_PTR_DEREFERENCE_SHUTDOWN_80000003_mscorwks.dll!PEImage::GetEntryPointToken BUCKET_ID: APPLICATION_FAULT_NULL_CLASS_PTR_DEREFERENCE_SHUTDOWN_DETOURED_mscorwks!PEImage::GetEntryPointToken+21 WATSON_STAGEONE_URL: http://watson.microsoft.com/StageOne/MyProcess_exe/2_4_4_39/4a8a192c/unknown/0_0_0_0/bbbbbbb4/80000003/00000000.htm?Retriage=1 Followup: MachineOwner Edit 1:The event log details for this error say it's a .NET Runtime version 2.0.50727.3053 - Fatal Execution Engine Error (7A097706)(80131506). Edit 2 (10-7-09): This issue is still active. Edit 3 (3-29-10): This update is to let everyone know that I never did successfully solve the problem. The customer who's machine this was on lost interest in solving it and just reimaged the machine :(. Thanks for all the contributions though.

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• WPF Tree doesn't work

  - by phenevo

  Could you tell me why I can't see subItems? I've got winforms apps and I added my wpfusercontrol:ObjectsAndZonesTree ServiceProvider is my webservice. Adn method to get listofcountires with subitems works properly (i get countires, regions from this countires, provinces etc...) ElementHost elementHost = new ElementHost { Width = 150, Height = 50, Dock = DockStyle.Fill, Child = new ObjectsAndZonesTree() }; this.splitContainer3.Panel1.Controls.Add(elementHost); XAML: <TreeView Name="GroupView" Grid.Row="0" Grid.Column="0" ItemsSource="{Binding}"> <TreeView.Resources> <HierarchicalDataTemplate DataType="{x:Type ServiceProvider:Country }" ItemsSource="{Binding Items}"> <TextBlock Text="{Binding Path=Name}" /> </HierarchicalDataTemplate> <DataTemplate DataType="{x:Type ServiceProvider:Region}" > <TextBlock Text="{Binding Path=Name}" /> </DataTemplate> <DataTemplate DataType="{x:Type ServiceProvider:Province}" > <TextBlock Text="{Binding Path=Name}" /> </DataTemplate> </TreeView.Resources> </TreeView> XAML.CS public ObjectsAndZonesTree() { InitializeComponent(); LoadView(); } private void LoadView() { GroupView.ItemsSource = new ServiceProvider().GetListOfObjectsAndZones(); } class Country: public class Country { string _name; [XmlAttribute] public string Name { get { return _name; } set { _name = value; } } string _code; [XmlAttribute] public string Code { get { return _code; } set { _code = value; } } string _continentCode; [XmlAttribute] public string ContinentCode { get { return _continentCode; } set { _continentCode = value; } } public Region[] ListOfRegions { get { return _listOfRegions; } set { _listOfRegions = value; } } private Region[] _listOfRegions; public IList<object> Items { get { IList<object> childNodes = new List<object>(); foreach (var group in this.ListOfRegions) childNodes.Add(group); return childNodes; } } } Class Region: public class Region { private Province[] _listOfProvinces; private string _name; private string _code; public Province[] ListOfProvinces { get { return _listOfProvinces; } set { _listOfProvinces = value; } } public string Name { get { return _name; } set { _name = value; } } public string Code { get { return _code; } set { _code = value; } } public string CountryCode { get { return _countryCode; } set { _countryCode = value; } } private string _countryCode; public IList<object> Items { get { IList<object> childNodes = new List<object>(); foreach (var group in this.ListOfProvinces) childNodes.Add(group); return childNodes; } } } It displays me only list of countires.

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• Rails 3.0.3 and Polyglot Gem problem

  - by user557417

  Hello all. I hope you can help me. I had a rails app running locally, and also uploaded and running on Heroku. All was well. Last week, I started work again and ran into a snag. At the beginning of my day, I opened up Terminal and ran 'rails s' to start the local server. I received this error: doug-naegeles-macbook-pro-17:elig_check dougnaegele$ rails s /Library/Ruby/Gems/1.8/gems/bundler-1.0.7/lib/bundler/resolver.rb:129:in resolve': Could not find gem 'polyglot', required by 'rails (= 3.0.3)', in any of the sources (Bundler::VersionConflict) from /Library/Ruby/Gems/1.8/gems/bundler-1.0.7/lib/bundler/resolver.rb:127:incatch' from /Library/Ruby/Gems/1.8/gems/bundler-1.0.7/lib/bundler/resolver.rb:127:in resolve' from /Library/Ruby/Gems/1.8/gems/bundler-1.0.7/lib/bundler/definition.rb:151:inresolve' from /Library/Ruby/Gems/1.8/gems/bundler-1.0.7/lib/bundler/definition.rb:90:in specs' from /Library/Ruby/Gems/1.8/gems/bundler-1.0.7/lib/bundler/definition.rb:135:inspecs_for' from /Library/Ruby/Gems/1.8/gems/bundler-1.0.7/lib/bundler/definition.rb:124:in requested_specs' from /Library/Ruby/Gems/1.8/gems/bundler-1.0.7/lib/bundler/environment.rb:23:inrequested_specs' from /Library/Ruby/Gems/1.8/gems/bundler-1.0.7/lib/bundler/runtime.rb:11:in setup' from /Library/Ruby/Gems/1.8/gems/bundler-1.0.7/lib/bundler.rb:100:insetup' from /Users/dougnaegele/Sites/elig_check/config/boot.rb:8 from script/rails:5:in `require' from script/rails:5 When I run 'gem list'..i can see Polyglot listed: doug-naegeles-macbook-pro-17:elig_check dougnaegele$ gem list * LOCAL GEMS * abstract (1.0.0) actionmailer (3.0.3, 2.3.5, 2.2.2, 1.3.6) actionpack (3.0.3, 2.3.5, 2.2.2, 1.13.6) actionwebservice (1.2.6) activemodel (3.0.3) activerecord (3.0.3, 2.3.5, 2.2.2, 1.15.6) activeresource (3.0.3, 2.3.5, 2.2.2) activesupport (3.0.3, 2.3.5, 2.2.2, 1.4.4) acts_as_ferret (0.5.2, 0.4.3) arel (2.0.6, 2.0.4) authlogic (2.1.6) blythedunham-sms_on_rails (0.1.0) builder (3.0.0, 2.1.2) bundler (1.0.7) capistrano (2.5.19, 2.5.2) cgi_multipart_eof_fix (2.5.0) color (1.4.1) configuration (1.2.0) crack (0.1.8) daemons (1.1.0, 1.0.10) derailed-ziya (2.1.5) dnssd (1.4, 0.6.0) erubis (2.6.6) fastthread (1.0.7, 1.0.1) fcgi (0.8.8, 0.8.7) ferret (0.11.6) gem_plugin (0.2.3) googlecharts (1.6.0) heroku (1.14.10, 1.14.3) highline (1.6.1, 1.5.0) hpricot (0.8.3, 0.6.164) httparty (0.6.1) i18n (0.5.0, 0.4.2) jk-ferret (0.11.8.2) json_pure (1.4.6) launchy (0.3.7) libxml-ruby (1.1.4, 1.1.2) little-plugger (1.1.2) logging (1.4.3) mail (2.2.12, 2.2.10) mattetti-googlecharts (1.4.0) mime-types (1.16) mongrel (1.1.5) mysql (2.8.1) needle (1.3.0) net-scp (1.0.4, 1.0.1) net-sftp (2.0.5, 2.0.1, 1.1.1) net-ssh (2.0.23, 2.0.4, 1.1.4) net-ssh-gateway (1.0.1, 1.0.0) nifty-generators (0.4.2) polyglot (0.3.1) rack (1.2.1, 1.0.1) rack-mount (0.6.13) rack-test (0.5.6) rails (3.0.3, 2.3.5, 2.2.2, 1.2.6) railties (3.0.3) rake (0.8.7, 0.8.3) RedCloth (4.2.3, 4.1.1) rest-client (1.6.1) ruby-openid (2.1.8, 2.1.2) ruby-yadis (0.3.4) rubygems-update (1.3.7, 1.3.6) rubynode (0.1.5) sequel (3.18.0, 3.17.0) sinatra (1.1.0, 1.0) sqlite3-ruby (1.3.2, 1.2.5, 1.2.4) static_record_cache (0.2.0) taps (0.3.14) termios (0.9.4) thor (0.14.6) tilt (1.1) treetop (1.4.9) twilio (2.9.0) twiliolib (2.0.7) tzinfo (0.3.23) xmpp4r (0.5, 0.4) When I run 'gem sources' I get this: doug-naegeles-macbook-pro-17:elig_check dougnaegele$ gem sources * CURRENT SOURCES * rubygems.org/ gems.github.com gems.github.com gems.github.com/ gems.github.com gems.rubyforge.org Which looks right -- that's where Polyglot lives. When I run 'bundle install' I get this: doug-naegeles-macbook-pro-17:elig_check dougnaegele$ bundle install Fetching source index for http://rubygems.org/ Could not find gem 'polyglot', required by 'rails (= 3.0.3)', in any of the sources Any idea? I've tried to reinstall the gem, run 'bundle install' etc. No luck. (I have a suspicion that this - rails (3.0.3, 2.3.5, 2.2.2, 1.2.6) may be the problem, but I don't want to go down that road just yet. I have apps running on 2.3.5 that have not been refactored for rails 3.0) Thanks in advance! Doug

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• Simple Observation in Django: How Can I Correctly Modify The `attrs` sent to __new__ of a Django Mod

  - by DGGenuine

  Hello, I'm a strong proponent of the observer pattern, and this is what I'd like to be able to do in my Django models.py: class AModel(Model): __metaclass__ = SomethingMagical @post_save(AnotherModel) @classmethod def observe_another_model_saved(klass, sender, instance, created, **kwargs): pass @pre_init('YetAnotherModel') @classmethod def observe_yet_another_model_initializing(klass, sender, *args, **kwargs): pass @post_delete('DifferentApp.SomeModel') @classmethod def observe_some_model_deleted(klass, sender, **kwargs): pass This would connect a signal with sender = the decorator's argument and receiver = the decorated method. Right now my signal connection code all exists in __init__.py which is okay, but a little unmaintainable. I want this code all in one place, the models.py file. Thanks to helpful feedback from the community I'm very close (I think.) (I'm using a metaclass solution instead of the class decorator solution in the previous question/answer because you can't set attributes on classmethods, which I need.) I am having a strange error I don't understand. At the end of my post are the contents of a models.py that you can pop into a fresh project/application to see the error. Set your database to sqlite and add the application to installed apps. This is the error: Validating models... Unhandled exception in thread started by Traceback (most recent call last): File "/Library/Python/2.6/site-packages//lib/python2.6/site-packages/django/core/management/commands/runserver.py", line 48, in inner_run File "/Library/Python/2.6/site-packages/django/core/management/base.py", line 253, in validate raise CommandError("One or more models did not validate:\n%s" % error_text) django.core.management.base.CommandError: One or more models did not validate: local.myothermodel: 'my_model' has a relation with model MyModel, which has either not been installed or is abstract. I've indicated a few different things you can comment in/out to fix the error. First, if you don't modify the attrs sent to the metaclass's __new__, then the error does not arise. (Note even if you copy the dictionary element by element into a new dictionary, it still fails; only using the exact attrs dictionary works.) Second, if you reference the first model by class rather than by string, the error also doesn't arise regardless of what you do in __new__. I appreciate your help. I'll be githubbing the solution if and when it works. Maybe other people would enjoy a simplified way to use Django signals to observe application happenings. #models.py from django.db import models from django.db.models.base import ModelBase from django.db.models import signals import pdb class UnconnectedMethodWrapper(object): sender = None method = None signal = None def __init__(self, signal, sender, method): self.signal = signal self.sender = sender self.method = method def post_save(sender): return _make_decorator(signals.post_save, sender) def _make_decorator(signal, sender): def decorator(view): return UnconnectedMethodWrapper(signal, sender, view) return decorator class ConnectableModel(ModelBase): """ A meta class for any class that will have static or class methods that need to be connected to signals. """ def __new__(cls, name, bases, attrs): unconnecteds = {} ## NO WORK newattrs = {} for name, attr in attrs.iteritems(): if isinstance(attr, UnconnectedMethodWrapper): unconnecteds[name] = attr newattrs[name] = attr.method #replace the UnconnectedMethodWrapper with the method it wrapped. else: newattrs[name] = attr ## NO WORK # newattrs = {} # for name, attr in attrs.iteritems(): # newattrs[name] = attr ## WORKS # newattrs = attrs new = super(ConnectableModel, cls).__new__(cls, name, bases, newattrs) for name, unconnected in unconnecteds.iteritems(): _connect_signal(unconnected.signal, unconnected.sender, getattr(new, name), new._meta.app_label) return new def _connect_signal(signal, sender, receiver, default_app_label): # full implementation also accepts basestring as sender and will look up model accordingly signal.connect(sender=sender, receiver=receiver) class MyModel(models.Model): __metaclass__ = ConnectableModel @post_save('In my application this string matters') @classmethod def observe_it(klass, sender, instance, created, **kwargs): pass @classmethod def normal_class_method(klass): pass class MyOtherModel(models.Model): ## WORKS # my_model = models.ForeignKey(MyModel) ## NO WORK my_model = models.ForeignKey('MyModel')

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• Tomcat 6, JPA and Data sources

  - by asrijaal

  Hi there, I'm trying to get a data source working in my jsf app. I defined the data source in my web-apps context.xml webapp/META-INF/context.xml <?xml version="1.0" encoding="UTF-8"?> <Context antiJARLocking="true" path="/Sale"> <Resource auth="Container" driverClassName="com.mysql.jdbc.Driver" maxActive="20" maxIdle="10" maxWait="-1" name="Sale" password="admin" type="javax.sql.DataSource" url="jdbc:mysql://localhost/sale" username="admin"/> </Context> web.xml <?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <filter> <display-name>RichFaces Filter</display-name> <filter-name>richfaces</filter-name> <filter-class>org.ajax4jsf.Filter</filter-class> </filter> <filter-mapping> <filter-name>richfaces</filter-name> <servlet-name>Faces Servlet</servlet-name> <dispatcher>REQUEST</dispatcher> <dispatcher>FORWARD</dispatcher> <dispatcher>INCLUDE</dispatcher> </filter-mapping> <servlet> <servlet-name>Faces Servlet</servlet-name> <servlet-class>javax.faces.webapp.FacesServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>Faces Servlet</servlet-name> <url-pattern>/faces/*</url-pattern> </servlet-mapping> <session-config> <session-timeout> 30 </session-timeout> </session-config> <welcome-file-list> <welcome-file>faces/welcomeJSF.jsp</welcome-file> </welcome-file-list> <context-param> <param-name>org.richfaces.SKIN</param-name> <param-value>ruby</param-value> </context-param> </web-app> and my persistence.xml <?xml version="1.0" encoding="UTF-8"?> <persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd"> <persistence-unit name="SalePU" transaction-type="RESOURCE_LOCAL"> <provider>oracle.toplink.essentials.PersistenceProvider</provider> <non-jta-data-source>Sale</non-jta-data-source> <class>org.comp.sale.AnfrageAnhang</class> <class>org.comp.sale.Beschaffung</class> <class>org.comp.sale.Konto</class> <class>org.comp.sale.Anfrage</class> <exclude-unlisted-classes>false</exclude-unlisted-classes> </persistence-unit> </persistence> But no data source seems to be created by Tomcat, I only get this exception Exception [TOPLINK-7060] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.ValidationException Exception Description: Cannot acquire data source [Sale]. Internal Exception: javax.naming.NameNotFoundException: Name Sale is not bound in this Context The needed jars for the MySQL driver are included into the WEB-INF/lib dir. What I'm doing wrong?

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• Mobile App Data Syncronization

  - by Matt Rogish

  Let's say I have a mobile app that uses HTML5 SQLite DB (and/or the HTML5 key-value store). Assets (media files, PDFs, etc.) are stored locally on the mobile device. Luckily enough, the mobile device is a read-only copy of the "centralized" storage, so the mobile device won't have to propagate changes upstream. However, as the server changes assets (creates new ones, modifies existing, deletes old ones) I need to propagate those changes back to the mobile app. Assume that server changes are grouped into changesets (version number n) that contain some information (added element XYZ, deleted id = 45, etc.) and that the mobile device has limited CPU/bandwidth, so most of the processing has to take place on the server. I can think of a couple of methods to do this. All have trade-offs and at this point, I'm unsure which is the right course of action... Method 1: For change set n, store the "diff" of the current n and previous n-1. When a client with version y asks if there have been any changes, send the change sets from version y up to the current version. e.g. added item 334, contents: xxx. Deleted picture 44. Deleted PDF 11. Changed 33. added picture 99. Characteristics: Diffs take up space, although in theory would be kept small. However, all diffs must be kept around indefinitely (should a v1 app have not been updated for a year, must apply v2..v100). High latency devices (mobile apps) will incur a penalty to send lots of small files (assume cannot be zipped or tarr'd up into one file) Very few server CPU resources required, as all it does is send the client a list of files "Dumb" - if I change an item in change set 3, and change it to something else in 4, the client is going to perform both actions, even though #3 is rendered moot by #4. Or, if an asset is added in #4 and removed in #5 - the client will download a file just to delete it later. Method 2: Very similar to method 1 except on the server, do some sort of a diff between the change sets represented by the app version and server version. Package that up and send that single change set to the client. Characteristics: Client-efficient: The client only has to process one file, duplicate or irrelevant changes are stripped out. Server CPU/space intensive. The change sets must be diff'd and then written out to a file that is then sent to the client. Makes diff server scalability an issue. Possibly ways to cache the results and re-use them, but in the wild there's likely to be a lot of different versions so the diff re-use has a limit Diff algorithm is complicated. The change sets must be structured in such a way that an efficient and effective diff can be performed. Method 3: Instead of keeping diffs, write out the entire versioned asset collection to a mobile-database import file. When client requests an update, send the entire database to client and have them update their assets appropriately. Characteristics: Conceptually simple -- easy to develop and deploy Very inefficient as the client database is restored every update. If only one new thing was added, the whole database is refreshed. Server space and CPU efficient. Only the latest version DB needs kept around and the server just throws the file to the client. Others?? Thoughts? Thanks!!

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• Xcode/iPhone Development 6 months in - Annoyances

  - by clearbrian

  Hi I've been iPhone programming for 6 months and come from a PC/Java/Eclipse background and still have a few annoyances with Xcode/iPhone programming I wonder are there any shortcuts to. Is there any way to prevent multiple windows opening all the time in XCode? a) When you click on the Errors/Warnings in the bottom right of the status bar build errors are shown in separate window. Any way to get these to show in the main editor? b) Anyway to get debugger to appear in main editor. I have a big screen iMac and it's still window hell on Macs. When you come from Alt-Tab the Mac is a nightmare. 2) Anyway to get a toolbar item on the main editor to: a) Open Console (I know CMD-thingy-R) b) Open Break points (you have to open Debugger first then breakpoints) I know there's keyboard shortcuts but I have only left hand free others on the trackball so any keys on right hand side of keyboard are too far. I know you can add Finder toolbar scripts (just wondering if anyway to extend Xcode). Are there utilities to extend Xcode? Scripts/Automator/Any Services I can setup to help. Can you automate Xcode like you can with Windows/ActiveX/VBA 3) Limit lookups using CMD + double click. If I double click on a variable to find its definition using CMD + double click it shows every occurrence of all variables with that name. (annoying it you name all you maps mapView) Anyway to get it to limit to the current class or at least order so current class is first. 4) Find doesn't seem to loop backwards if result all above cursor position I'm in a class and I hit CMD + F for find. Find box appears. I enter some text hit return. It says I have x matches but only back arrow is highlight in Find But when I hit < it does nothing. I need to scroll to the top and redo the search. If the text is both forwards and backwards then both < are highlighted and it works. is this a bug or a 'feature' Missing Eclipse features I have been looking at the User Script menu but was wondering how powerful they are? 5) any scripts around to generate source from members such as description: @property @synthesize if I add a new member, run a script will generate @property/@syntesize and release in dealloc 7) any good sites for scripts? SCM Im having problems with SCM and Folders on HD under project Classes directory. You get a library e.g. JSON. It usually comes as a folder. You copy it to the /Classes for your project. /Classes/JSON I create a Group for the Library in Xcode under Classes group. Classes JSON I drag the files from the folder into xcode into the JSON Group. I add them to the SCM and icon changes from ? to A but if I try and commit them it say folder /JSON is not under SCM. Can you drag a folder into Xcode so that it AND its files get included in SCM? Anyway to stop Xcode Help from being on top all the time. I keep feeling like punching it and telling it to get out of the way! :) I dont mind it open just not in the way once I've finished. Yes I know I can Ctrl-W Sites: the main site I use to learn Obj-C are : stackoverflow.com Google code Search - tonnes of full apps on here http://www.iphonedevsdk.com/forum/iphone-sdk-development/ Apple Developers Forums (anyway to get RSS feed to these or is that blasphemy :) ) Safari - 100s of IT book though prob too many to keep up :) any others? Any site that gives simple examples for Obj-C/ UIKit The docs just show the methods but actual examples (Google code search has helped a lot here)

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• WinQual: Why would WER not accept code-signing certificates?

  - by Ian Boyd

  In 2005 i tried to establish a WinQual account with Microsoft, so i could pick up our (if any) crash dump files submitted automatically through Windows Error Reporting (WER). i was not allowed to have my crash dumps, because i don't have a Verisign certificate. Instead i have a cheaper one, generated by a Verisign subsidiary: Thawte. The method in which you join is: you digitally sign a sample exe they provide. This proves that you are the same signer that signed apps that they got crash dumps from in the wild. Cryptographically, the private key is needed to generate a digital signature on an executable. Only the holder of that private key can create a signature with for the matching public key. It doesn't matter who generated that private key. That includes certificates that are generated from: self-signing Wells Fargo DigiCert SecureTrust Trustware QuoVadis GoDaddy Entrust Cybertrust GeoTrust GlobalSign Comodo Thawte Verisign Yet Microsof's WinQual only accepts digital certificates generated by Verisign. Not even Verisign's subsidiaries are good enough (Thawte). Can anyone think of any technical, legal or ethical reason why Microsoft doesn't want to accept code-signing certificates? The WinQual site says: Why Is a Digital Certificate Required for Winqual Membership? A digital certificate helps protect your company from individuals who seek to impersonate members of your staff or who would otherwise commit acts of fraud against your company. Using a digital certificate enables proof of an identity for a user or an organization. Is somehow a Thawte digital certificate not secure? Two years later, i sent a reminder notice to WinQual that i've been waiting to be able to get at my crash dumps. The response from WinQual team was: Hello, Thanks for the reminder. We have notified the appropriate people that this is still a request. In 2008 i asked this question in a Microsoft support forum, and the response was: We are only setup to accept VeriSign Certificates at this point. We have not had an overwhelming demand to support other types of certificates. What can it possibly mean to not be "setup" to accept other kinds of certificates? If the thumbprint of the key that signed the WinQual.exe test app is the same as the thumbprint that signed the executable who's crash dump you got in the wild: it is proven - they are my crash dumps, give them to me. And it's not like there's a special API to check if a Verisign digital signature is valid, as opposed to all other digital signatures. A valid signature is valid no matter who generated the key. Microsoft is free to not trust the signer, but that's not the same as identity. So that is my question, can anyone think of any practical reason why WinQual isn't setup to support digital signatures? One person theorized that the answer is that they're just lazy: Not that I know but I would assume that the team running the winQual system is a live team and not a dev team - as in, personality and skillset geared towards maintenance of existing systems. I could be wrong though. They don't want to do work to change it. But can anyone think of anything that would need to be changed? It's the same logic no matter what generated the key: "does the thumbprint match". What am i missing?

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• Single django instance with subdomains for each app in the django project

  - by jwesonga

  I have a django project (django+apache+mod_wsgi+nginx) with multiple apps, I'd like to map each app as a subdomain: project/ app1 (domain.com) app2 (sub1.domain.com) app3 (sub3.domain.com) I have a single .wsgi script serving the project, which is stored in a folder /apache. Below is my vhost file. I'm using a single vhost file instead of separate ones for each sub-domain: <VirtualHost *:8080> ServerAdmin [email protected] ServerName www.domain.com ServerAlias domain.com DocumentRoot /home/path/to/app/ Alias /admin_media/ /usr/local/lib/python2.6/dist-packages/django/contrib/admin/media <Directory /home/path/to/wsgi/apache/> Order deny,allow Allow from all </Directory> LogLevel warn ErrorLog /home/path/to/logs/apache_error.log CustomLog /home/path/to/logs/apache_access.log combined WSGIDaemonProcess domain.com user=www-data group=www-data threads=25 WSGIProcessGroup domain.com WSGIScriptAlias / /home/path/to/apache/kcdf.wsgi </VirtualHost> <VirtualHost *:8081> ServerAdmin [email protected] ServerName sub1.domain.com ServerAlias sub1.domain.com DocumentRoot /home/path/to/app Alias /admin_media/ /usr/local/lib/python2.6/dist-packages/django/contrib/admin/media <Directory /home/path/to/wsgi/apache/> Order deny,allow Allow from all </Directory> LogLevel warn ErrorLog /home/path/to/logs/apache_error.log CustomLog /home/path/to/logs/apache_access.log combined WSGIDaemonProcess sub1.domain.com user=www-data group=www-data threads=25 WSGIProcessGroup sub1.domain.com WSGIScriptAlias / /home/path/to/apache/kcdf.wsgi </VirtualHost> My Nginx configuration for the domain.com: server { listen 80; server_name domain.com; access_log off; error_log off; # proxy to Apache 2 and mod_wsgi location / { proxy_pass http://127.0.0.1:8080/; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_max_temp_file_size 0; client_max_body_size 10m; client_body_buffer_size 128k; proxy_connect_timeout 90; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; proxy_buffers 4 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; } } Configuration for the sub.domain.com: server { listen 80; server_name sub.domain.com; access_log off; error_log off; # proxy to Apache 2 and mod_wsgi location / { proxy_pass http://127.0.0.1:8081/; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_max_temp_file_size 0; client_max_body_size 10m; client_body_buffer_size 128k; proxy_connect_timeout 90; proxy_send_timeout 90; proxy_read_timeout 90; proxy_buffer_size 4k; proxy_buffers 4 32k; proxy_busy_buffers_size 64k; proxy_temp_file_write_size 64k; } } This set up doesn't seem to work, everything seems to point to the main domain. I've tried http://effbot.org/zone/django-multihost.htm which kind of worked but seems to have issues with loading my css,images,js files.

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• Is C# slower than VB.NET?

  - by Matt Winckler

  Believe it or not, despite the title, this is not a troll. Running some benchmarks this morning, my colleagues and I have discovered some strange things concerning performance, and I am wondering if we're doing something horribly wrong. We started out comparing C# vs. Delphi Prism calculating prime numbers, and found that Prism was about 30% faster. I figured maybe CodeGear did more optimization when generating IL (the exe was about twice as big as C#'s and had all sorts of different IL in it.) So I decided to write a test in VB.NET as well, assuming that Microsoft's compilers would end up writing essentially the same IL for each language. However, the result there was more shocking: C# was more than three times slower than VB running the same operations. The generated IL was different, but not extremely so, and I'm not good enough at reading it to understand the differences. As a fan of C#, this apparent slowness wounds me horribly, and I am left wondering: what in the world is going on here? Is it time to pack it all in and go write web apps in Ruby? ;-) I've included the code for each below--just copy it into a new VB or C# console app, and run. On my machine, VB finds 348513 primes in about 6.36 seconds. C# finds the same number of primes in 21.76 seconds. (I've got an Intel Core2 Quad Q6600 @2.4Ghz; on another Intel machine in the office the code for both runs much faster but the ratio is about the same; on an AMD machine here the timing is ~10 seconds for VB and ~13 for C#--much less difference, but C# is still always slower.) Both of the console applications were compiled in Release mode, but otherwise no project settings were changed from the defaults generated by Visual Studio 2008. Is it a generally-known fact that C#'s generated IL is worse than VB's? Or is this a strange edge case? Or is my code flawed somehow (most likely)? Any insights are appreciated. VB code Imports System.Diagnostics Module Module1 Private temp As List(Of Int32) Private sw As Stopwatch Private totalSeconds As Double Sub Main() serialCalc() End Sub Private Sub serialCalc() temp = New List(Of Int32)() sw = Stopwatch.StartNew() For i As Int32 = 2 To 5000000 testIfPrimeSerial(i) Next sw.Stop() totalSeconds = sw.Elapsed.TotalSeconds Console.WriteLine(String.Format("{0} seconds elapsed.", totalSeconds)) Console.WriteLine(String.Format("{0} primes found.", temp.Count)) Console.ReadKey() End Sub Private Sub testIfPrimeSerial(ByVal suspectPrime As Int32) For i As Int32 = 2 To Math.Sqrt(suspectPrime) If (suspectPrime Mod i = 0) Then Exit Sub End If Next temp.Add(suspectPrime) End Sub End Module C# Code using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Diagnostics; namespace FindPrimesCSharp { class Program { List<Int32> temp = new List<Int32>(); Stopwatch sw; double totalSeconds; static void Main(string[] args) { new Program().serialCalc(); } private void serialCalc() { temp = new List<Int32>(); sw = Stopwatch.StartNew(); for (Int32 i = 2; i <= 5000000; i++) { testIfPrimeSerial(i); } sw.Stop(); totalSeconds = sw.Elapsed.TotalSeconds; Console.WriteLine(string.Format("{0} seconds elapsed.", totalSeconds)); Console.WriteLine(string.Format("{0} primes found.", temp.Count)); Console.ReadKey(); } private void testIfPrimeSerial(Int32 suspectPrime) { for (Int32 i = 2; i <= Math.Sqrt(suspectPrime); i++) { if (suspectPrime % i == 0) return; } temp.Add(suspectPrime); } } }

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• Defines JEE 5 the handling of commit error using bean managed transactions?

  - by marabol

  I'm using glassfish 2.1 and 2.1.1. If I've a bean method annotated by @TransactionAttribute(value = TransactionAttributeType.REQUIRES_NEW). After doing some JPA stuff the commit fails in the afterCompletion-Phase of JTS. GlassFish logs this failure only. And the caller of this bean method has no chance to know something goes wrong. So I wonder, if there is any definition how a jee 5 server has to handle exceptions while commiting. I would expect any runtime exception. I'm using stateless beans. With SessionSynchronisation I could get the commit failue, if I use statefull beans. Is it possible to intercept, so I can throw an exception, that I've declared in my interface? This is the whole exception stacktrace: [#|2010-05-06T12:15:54.840+0000|WARNING|sun-appserver2.1|oracle.toplink.essentials.session.file:/C:/glassfish/domains/domain1/applications/j2ee-apps/my-ear-1.0.0-SNAPSHOT/my-jar-1.1.8_jar/-myPu.transaction|_ThreadID=25;_ThreadName=p: thread-pool-1; w: 15;_RequestID=67a475a1-25c3-4416-abea-0d159f715373;| java.lang.RuntimeException: Got exception during XAResource.end: oracle.jdbc.xa.OracleXAException at com.sun.enterprise.distributedtx.J2EETransactionManagerOpt.delistResource(J2EETransactionManagerOpt.java:224) at com.sun.enterprise.resource.ResourceManagerImpl.unregisterResource(ResourceManagerImpl.java:265) at com.sun.enterprise.resource.ResourceManagerImpl.delistResource(ResourceManagerImpl.java:223) at com.sun.enterprise.resource.PoolManagerImpl.resourceClosed(PoolManagerImpl.java:400) at com.sun.enterprise.resource.ConnectorAllocator$ConnectionListenerImpl.connectionClosed(ConnectorAllocator.java:72) at com.sun.gjc.spi.ManagedConnection.connectionClosed(ManagedConnection.java:639) at com.sun.gjc.spi.base.ConnectionHolder.close(ConnectionHolder.java:201) at com.sun.gjc.spi.jdbc40.ConnectionHolder40.close(ConnectionHolder40.java:519) at oracle.toplink.essentials.internal.databaseaccess.DatabaseAccessor.closeDatasourceConnection(DatabaseAccessor.java:394) at oracle.toplink.essentials.internal.databaseaccess.DatasourceAccessor.closeConnection(DatasourceAccessor.java:382) at oracle.toplink.essentials.internal.databaseaccess.DatabaseAccessor.closeConnection(DatabaseAccessor.java:417) at oracle.toplink.essentials.internal.databaseaccess.DatasourceAccessor.afterJTSTransaction(DatasourceAccessor.java:115) at oracle.toplink.essentials.threetier.ClientSession.afterTransaction(ClientSession.java:119) at oracle.toplink.essentials.internal.sessions.UnitOfWorkImpl.afterTransaction(UnitOfWorkImpl.java:1841) at oracle.toplink.essentials.transaction.AbstractSynchronizationListener.afterCompletion(AbstractSynchronizationListener.java:170) at oracle.toplink.essentials.transaction.JTASynchronizationListener.afterCompletion(JTASynchronizationListener.java:102) at com.sun.jts.jta.SynchronizationImpl.after_completion(SynchronizationImpl.java:154) at com.sun.jts.CosTransactions.RegisteredSyncs.distributeAfter(RegisteredSyncs.java:210) at com.sun.jts.CosTransactions.TopCoordinator.afterCompletion(TopCoordinator.java:2585) at com.sun.jts.CosTransactions.CoordinatorTerm.commit(CoordinatorTerm.java:433) at com.sun.jts.CosTransactions.TerminatorImpl.commit(TerminatorImpl.java:250) at com.sun.jts.CosTransactions.CurrentImpl.commit(CurrentImpl.java:623) at com.sun.jts.jta.TransactionManagerImpl.commit(TransactionManagerImpl.java:309) at com.sun.enterprise.distributedtx.J2EETransactionManagerImpl.commit(J2EETransactionManagerImpl.java:1029) at com.sun.enterprise.distributedtx.J2EETransactionManagerOpt.commit(J2EETransactionManagerOpt.java:398) at com.sun.ejb.containers.BaseContainer.completeNewTx(BaseContainer.java:3817) at com.sun.ejb.containers.BaseContainer.postInvokeTx(BaseContainer.java:3610) at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1379) at com.sun.ejb.containers.BaseContainer.postInvoke(BaseContainer.java:1316) at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:205) at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:127) at $Proxy127.myNewTxMethod(Unknown Source) at mypackage.MyBean2.myMethod(MyBean2.java:197) at mypackage.MyBean2.myMethod2(MyBean2.java:166) at mypackage.MyBean2.myMethod3(MyBean2.java:105) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at com.sun.enterprise.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1011) at com.sun.enterprise.security.SecurityUtil.invoke(SecurityUtil.java:175) at com.sun.ejb.containers.BaseContainer.invokeTargetBeanMethod(BaseContainer.java:2920) at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4011) at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:197) at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:127) at $Proxy158.myMethod3(Unknown Source) at mypackage.MyBean3.myMethod4(MyBean3.java:94) at mypackage.MyBean3.onMessage(MyBean3.java:85) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at com.sun.enterprise.security.SecurityUtil$2.run(SecurityUtil.java:181) at java.security.AccessController.doPrivileged(Native Method) at com.sun.enterprise.security.application.EJBSecurityManager.doAsPrivileged(EJBSecurityManager.java:985) at com.sun.enterprise.security.SecurityUtil.invoke(SecurityUtil.java:186) at com.sun.ejb.containers.BaseContainer.invokeTargetBeanMethod(BaseContainer.java:2920) at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4011) at com.sun.ejb.containers.MessageBeanContainer.deliverMessage(MessageBeanContainer.java:1111) at com.sun.ejb.containers.MessageBeanListenerImpl.deliverMessage(MessageBeanListenerImpl.java:74) at com.sun.enterprise.connectors.inflow.MessageEndpointInvocationHandler.invoke(MessageEndpointInvocationHandler.java:179) at $Proxy192.onMessage(Unknown Source) at com.sun.messaging.jms.ra.OnMessageRunner.run(OnMessageRunner.java:258) at com.sun.enterprise.connectors.work.OneWork.doWork(OneWork.java:76) at com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:555) |#]

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• problem with send me log

  - by Lynnooi

  Hi, I had try to implement the send me log feature into my apps but I can't get it right. Can anyone please help me with it? In the logcat, it shows the errors: 03-29 21:23:37.636: ERROR/AndroidRuntime(820): Uncaught handler: thread AsyncTask #1 exiting due to uncaught exception 03-29 21:23:37.726: ERROR/AndroidRuntime(820): java.lang.RuntimeException: An error occured while executing doInBackground() 03-29 21:23:37.726: ERROR/AndroidRuntime(820): at android.os.AsyncTask$3.done(AsyncTask.java:200) 03-29 21:23:37.726: ERROR/AndroidRuntime(820): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:234) 03-29 21:23:37.726: ERROR/AndroidRuntime(820): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:258) 03-29 21:23:37.726: ERROR/AndroidRuntime(820): at java.util.concurrent.FutureTask.run(FutureTask.java:122) 03-29 21:23:37.726: ERROR/AndroidRuntime(820): at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:648) 03-29 21:23:37.726: ERROR/AndroidRuntime(820): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:673) 03-29 21:23:37.726: ERROR/AndroidRuntime(820): at java.lang.Thread.run(Thread.java:1058) 03-29 21:23:37.726: ERROR/AndroidRuntime(820): Caused by: java.lang.NullPointerException 03-29 21:23:37.726: ERROR/AndroidRuntime(820): at resonet.android.androidgallery.helloAndroid$CheckForceCloseTask.doInBackground(helloAndroid.java:1565) 03-29 21:23:37.726: ERROR/AndroidRuntime(820): at resonet.android.androidgallery.helloAndroid$CheckForceCloseTask.doInBackground(helloAndroid.java:1) 03-29 21:23:37.726: ERROR/AndroidRuntime(820): at android.os.AsyncTask$2.call(AsyncTask.java:185) 03-29 21:23:37.726: ERROR/AndroidRuntime(820): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:256) 03-29 21:23:37.726: ERROR/AndroidRuntime(820): ... 4 more Thanks. Here is my code: public class helloAndroid extends Activity implements OnClickListener { public static final int DIALOG_SEND_LOG = 345350; protected static final int DIALOG_PROGRESS_COLLECTING_LOG = 3255; protected static final int DIALOG_FAILED_TO_COLLECT_LOGS = 3535122; private static final int DIALOG_REPORT_FORCE_CLOSE = 3535788; private LogCollector mLogCollector; public void onCreate(Bundle savedInstanceState) { requestWindowFeature(Window.FEATURE_NO_TITLE); Bundle b = this.getIntent().getExtras(); s = b.getString("specialValue").trim(); String xmlURL = ""; CheckForceCloseTask task = new CheckForceCloseTask(); task.execute(); } private void throwException() { throw new NullPointerException(); } @Override protected Dialog onCreateDialog(int id) { Dialog dialog = null; switch (id) { case DIALOG_SEND_LOG: case DIALOG_REPORT_FORCE_CLOSE: Builder builder = new AlertDialog.Builder(this); String message; if (id==DIALOG_SEND_LOG) message = "Do you want to send me your logs?"; else message = "It appears this app has been force-closed, do you want to report it to me?"; builder.setTitle("Warning") .setIcon(android.R.drawable.ic_dialog_alert) .setMessage(message) .setPositiveButton("Yes", this) .setNegativeButton("No", this); dialog = builder.create(); break; case DIALOG_PROGRESS_COLLECTING_LOG: ProgressDialog pd = new ProgressDialog(this); pd.setTitle("Progress"); pd.setMessage("Collecting logs..."); pd.setIndeterminate(true); dialog = pd; break; case DIALOG_FAILED_TO_COLLECT_LOGS: builder = new AlertDialog.Builder(this); builder.setTitle("Error") .setMessage("Failed to collect logs.") .setNegativeButton("OK", null); dialog = builder.create(); } return dialog; } class CheckForceCloseTask extends AsyncTask { @Override protected Boolean doInBackground(Void... params) { return mLogCollector.hasForceCloseHappened(); } @Override protected void onPostExecute(Boolean result) { if (result) { showDialog(DIALOG_REPORT_FORCE_CLOSE); } else Toast.makeText(getApplicationContext(), "No force close detected.", Toast.LENGTH_LONG).show(); } } public void onClick(DialogInterface dialog, int which) { switch (which) { case DialogInterface.BUTTON_POSITIVE: new AsyncTask() { @Override protected Boolean doInBackground(Void... params) { return mLogCollector.collect(); } @Override protected void onPreExecute() { showDialog(DIALOG_PROGRESS_COLLECTING_LOG); } @Override protected void onPostExecute(Boolean result) { dismissDialog(DIALOG_PROGRESS_COLLECTING_LOG); if (result) mLogCollector.sendLog("[email protected]", "Error Log", "Preface\nPreface line 2"); else showDialog(DIALOG_FAILED_TO_COLLECT_LOGS); } }.execute(); } dialog.dismiss(); } }

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