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• Windows Azure local development environment speed

  - by Paperjam

  I've started porting an existing ASP.NET web app to Windows Azure and have noticed that the development process is really slow. Each time I make a change to my code and want to view it, I have to effectively redeploy it to the local dev cloud (using Start debugging (F5) or Start without debugging (Ctrl-F5). The process itself takes over a minute, during which time Visual Studio is completely unresponsive. Am I doing something wrong or is that simply how things are developing for Azure? My specs: Visual Studio 2008 9.0.30729.1 SP 5 projects running on .NET 3.5 SP1 Azure SDK 1.1 (February 2010) Single instance of a single web role Dual-core AMD 64 machine with 8GB RAM, 64-bit Windows 7, fully patched The main project itself is quite large (3k files, ~200k lines) but compiles normally in 10-15 seconds

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• how to selfhost wcf without iis

  - by dotnetcoder

  Reading up on WCF we have self hosting option available , one limitation here is we have to manage the host process lifecycle ourselves. What I am exploring here is to run the service without IIS and do a self hosting. Few things come to mind - How will request management work here. In case of IIS it manages the request and give control to dotnet on a particular thread. In absence of IIS do we need to write code ourselves to manage incoming requests ( say on a tcp port ) or WCF provides some classes to manage request and spawn threads to process each thread. I am aware that in case of self hosting this needs to be a windows service. In case of self hosting how can me tap on the number of simultaneous requests on the sever , it can be managed by limiting the thread pool ? or we can configure this via wcf ? Thanks dc

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• Procedure to renew SSL certificate for custom java web server

  - by yogsma

  Does anyone the process to renew SSL certificate for custom java web server?

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• How do I view how many concurrent long polling requests there are on my server?

  - by Pascal

  My host is Joyent. My host says I have 15 process limit and prstat -J shows those processes but that doesn't tell me how many long polling requests are currently being served. I could record it myself but that would add alot of performance overhead. I need to know when the server is at its long polling limits. I know this limit occurs far before the memory or CPU is used up. From experimentation, I've already verified that the number of long polls open is NOT equivalant to the number of processes running, probably because each process has multiple threads, each serving a request. thanks.

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• How do IPC generate security holes

  - by Walidix

  Please some explanations and examples on how Inter-process communications can generate security holes Thank you in advance

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• Hibernate deletion issue

  - by muffytyrone

  I'm trying to write a Java app that imports a data file. The process is as follows Create Transaction Delete all rows from datatable Load data file into datatable Commit OR Rollback if any errors were encountered. The data loaded in step 3 is mostly the same as the data deleted in step3. The deletion is performed using the following DetachedCriteria criteria = DetachedCriteria.forClass(myObject.class); List<myObject> myObjects = hibernateTemplate.findByCriteria(criteria); hibernateTemplate.deleteAll(myObjects); When I then load the datafile, i get the following exception nested exception is org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: The whole process needs to take place in transaction. And I don't really want to have to compare the import file / data table and then perform an insert/update/delete to get them into sync. Any help would be appreciated.

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• Creating huge images

  - by David Rutten

  My program has the feature to export a hi-res image of the working canvas to the disk. Users will frequently try to export images of about 20,000 x 10,000 pixels @ 32bpp which equals about 800MB. Add that to the serious memory consumption already going on in your average 3D CAD program and you'll pretty much guarantee an out-of-memory crash on 32-bit platforms. So now I'm exporting tiles of 1000x1000 pixels which the user has to stitch together afterwards in a pixel editor. Is there a way I can solve this problem without the user doing any work? I figured I could probably write a small exe that gets command-lined into the process and performs the stitching automatically. It would be a separate process and it would thus have 2GB of ram all to itself. Or is there a better way still? I'd like to support jpg, png and bmp so writing the image as a bytestream to the disk is not really possible.

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• Linux Kernel - Adding field to task_struct

  - by Drex

  I'm playing around with the linux kernel and added a struct field to the task_struct in sched.h. I know that can be costly but my struct is very small. I then initialize the new struct in INIT_TASK() and also re-initialize in fork.c copy_process() function so that when the INIT task or any other task creates a new process the process gets the init values. What then happens is when I try to run the kernel I get a SEGFAULT. The gdb error is: Locating the bottom of the address space ... Program received signal SIGSEGV, Segmentation fault. 0x08066ad7 in page_ok (page=) at arch/um/os-Linux/sys-i386/task_size.c:31 31 n = *address; It looks like it fails out in task_size. Is there anything else I need to do to add a field to task_struct?

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• Ant build scripts totally hangs, with no messages in console

  - by voipsecuritydigest.com

  I have build.xml for my project, but even this small piece of code <target name="init"> <tstamp/> <!-- Create the build directory structure used by compile --> <mkdir dir="${build}"/> </target> It doesn't run Console is empty but process is active. I still can terminate it over STOP button In same time I cannot debug it as well, same stuff active process no output in console and I can wait forever! Any ideas? JDK 1.6.0_14 Eclipse 3.5.1

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• WCF SERVICE gives us faulted response

  - by malik

  My service is hosted on IIS7, windows 2008 server with sql server2008 express. I am getting following error when the process takes more than 2 minutes i got this response, i m unable to find out either it is due to sql server time out or wcf time out. my sql server process is also took long. An error occurred while receiving the HTTP response to http://REMOTE/SynchronizationService_test/SyncService.svc. This could be due to the service endpoint binding not using the HTTP protocol. This could also be due to an HTTP request context being aborted by the server (possibly due to the service shutting down). See server logs for more details.

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• Background thread in C#

  - by Xodarap

  When the user saves some data, I want to spin off a background thread to update my indexes and do some other random stuff. Even if there is an error in this indexing the user can't do anything about it, so there is no point in forcing the main thread to wait until the background thread finishes. I'm doing this from a ASP.NET process, so I think I should be able to do this (as the main thread exiting won't kill the process). When I set a breakpoint in the background thread's method though, the main thread also appears to stop. Is this just an artifact of visual studio's debugger, or is the main thread really not going to return until the background thread stops?

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• entity framework and dirty reads

  - by bryanjonker

  I have Entity Framework (.NET 4.0) going against SQL Server 2008. The database is (theoretically) getting updated during business hours -- delete, then insert, all through a transaction. Practically, it's not going to happen that often. But, I need to make sure I can always read data in the database. The application I'm writing will never do any types of writes to the data -- read-only. If I do a dirty read, I can always access the data; the worst that happens is I get old data (which is acceptable). However, can I tell Entity Framework to always use dirty reads? Are there performance or data integrity issues I need to worry about if I set up EF this way? Or should I take a step back and see about rewriting the process that's doing the delete/insert process?

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• Get controller method caller (3rd party webservice)

  - by bastijn

  Is it possible to retrieve the URL of a 3rd party webservice calling my controller method? Things like Request.Current.Url refer to my own URL (/someController/someAction/). The 3rd party webservice is sending HTTP POST data to my /someController/someAction and I wish to send back a HTTP POST message to the caller of the method, the 3rd party webservice, without using return Content["some response"] which will force me to exit the method. Since the answer is plain text I would like to send it using HTTP Post. What I actually try to do is respond to the calling webservice without exiting my method (return Content() will exit) so I can call other methods to process the data send to me by the webservice. I want to first tell the webservice I received their stuff and than process, in this way when a processing error occurs the webservice at least will not resend old data. Is there another way to do this than building your own HTTP post?

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• Build Pipelining and Continuous Integration with Maven and Hudson

  - by Brandon

  Currently the my team is considering splitting our single CI build process into a more streamlined multi-stage process to speed up basic build feedback and isolate different ci concerns. The idea we had was to have each stage exist in Hudson as a different build with the correct maven goal or maven plugin execution, then chain them together using the post-build hooks of Hudson. However to my knowledge, Maven as a build tool mandates that any lifecycle phase which is performed automatically builds every preceding lifecycle phase. This presents a number of problems the most significant of which is that maven is recreating the build resources with each distinct call and not using those of the previous stage. This not only breaks the consistency of the build lifecycle but has much more unnecessary processing overhead. Is there a way to accomplish pipelining with CI using Maven? Assuming there is, is there a way to let Hudson know to use those resources built from the previous stage in the next one?

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• Is Amazon SQS the right choice here? Rails performance issue.

  - by ole_berlin

  I'm close to releasing a rails app with the common networking features (messaging, wall, etc.). I want to use some kind of background processing (most likely Bj) for off-loading tasks from the request/response cycle. This would happen when users invite friends via email to join and for email notifications. I'm not sure if I should just drop these invites and notifications in my Database, using a model and then just process it with a worker process every x minutes or if I should go for Amazon SQS, storing the messages and invites there and let my worker retrieve it from Amazon SQS for processing (sending the invites / notifications). The Amazon approach would get load off my Database but I guess it is slower to retrieve messages from there. What do you think?

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• Unable to debug ASP.NET Applicatation using VS 2008 on IIS 7 running on Windows 7 x64

  - by rsteckly

  Hi, I've been trying to debug an existing asp.net web application that requires me to debug against an IIS website. I've installed the app and can navigate to it on localhost. However, when I start VS 2008 as an Administrator and try to debug it, I get a message "Unable to start debugging on the web server. The IIS worker process for the launched URL is not currently running." I've looked through some of the help file contents and can't seem to figure out what is going on. Clearly, the IIS worker process IS running, since I can navigate to the site locally without VS open. My boss has suggested that it might be because my OS is 64 bit. Any ideas?

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• Dequeue from messageQueue in the PeekCompleted Method

  - by Fraga

  i'm reading messages from MessageQueue using PeekCompleted, i do my process here and if everything go right, I need to remove it from the Queue! currenty i am using MyMessageQueue.Receive() and it works, but is this a reliable way of making sure each message will be processed right? MessageQueue MyMessageQueue; public Form1() { InitializeComponent(); MyMessageQueue = new MessageQueue(@".\private$\Dms"); MyMessageQueue.PeekCompleted += new PeekCompletedEventHandler(MessageQueue_PeekCompleted); MyMessageQueue.Formatter = new XmlMessageFormatter(new Type[] { typeof(string) }); MyMessageQueue.BeginPeek(); } void MessageQueue_PeekCompleted(object sender, PeekCompletedEventArgs e) { try { Debug.WriteLine("ToProcess:" + e.Message.Body); //Long process that maybe fail MyMessageQueue.Receive(); } finally { MyMessageQueue.BeginPeek(); } }

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• Avoid 404 page override

  - by vernomcrp

  I 'm using django-lfs with default django-app.Its appear django-lfs override 404 default template. How to avoid this process

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• Design pattern: polymorphisim for list of objects

  - by ziang

  Suppose I have a class A, and A1, A2 inherits from A. There are 2 functions: List<A1> getListA1(){...} List<A2> getListA2(){...} Now I want to do something similar to both A1 and A2 in another function public void process(List<A>){...} If I want to pass the instance of either ListA1 or ListA2, of course the types doesn't match because the compiler doesn't allow the coercion from List< A1 to List< A. I can't do something like this: List<A1> listA1 = getListA1(); List<A> newList = (List<A>)listA1; //this is not allowed. So what is the best approach to the process()? Is there any way to do it in a universal way rather than write the similar code to both List and List?

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• How to open sticky notes from my app?

  - by Riddle

  i want to open windows sticky notes from my app, i already know how to do this for calculator and paint but not sticky notes. (windows form) using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace main { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { System.Diagnostics.Process.Start("mspaint"); System.Diagnostics.Process.Start("calc"); //sticky notes } } }

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• GetBytes Issue in Loading External Flash

  - by henry

  I'm trying to debug a gallery section within a site of mine. Currently the section display a number of thumbnails which visitor select one to view. Once selected, the main flash loads in an external swf. To make the process smoother, I have a preloader for this process using normal getbytes codes. However for some reasons, the flash works fine in IE but not in Firefox or Chrome. In these browsers, as soon as you click the thumbnail, the preloader animated away to reveal the holder of the external swf. However as it is still loading, the holder is a blank area. Would appreciate if anyone can shed some light on why this is so.

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• better understanding of JSF Life cycle

  - by gurupriyan.e

  I need your help to understand this better. This is my case. I have a custom validator for each of my input controls in the form. So when there is any validation error,I add a corresponding FacesMessage in the validate method. My understanding was that when there is any validation error - or when there are any FacesMessages added in the validate method of the Custom Validator, it would skip the INVOKE APPLICATION phase and would directly call the RENDER RESPONSE PHASE - showing the FacesMessage that was added in the PROCESS VALIDATION Phase - Is this correct? The problem I'm facing is - I add a FacesMessage in the PROCESS VALIDATION Phase - because of a validation error - and I add a confirmation message for the action that was taken by the user in the INVOKE APPLICATION PHASE - Now both are shown in the page in the RENDER RESPONSE Phase ? - If my understanding is correct in the above question - is it the best practice to conditionally add a confirmation FacesMessage after confirming that there are no FacesMessages in the currect FacesContext ? Appreciate your help.

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• Manipulate Excel workbooks programmatically

  - by Tom

  I have an Excel workbook that I want to use as a template. It has several worksheets setup, one that produces the pretty graphs and summarizes the numbers. Sheet 1 needs to be populated with data that is generated by another program. The data comes in a tab delimited file. Currently the user imports the tab delimited file into a new Workbook, selects all and copies. Then goes to the template and pastes the data into sheet1. This is a large amount of data, 269 columns and over 135,000 rows. It’s a cumbersome process and the users are not experienced Excel users. All they really want is the pretty graphs. I would like to add a step after the program that generates the data to programmatically automate the process the user currently must do manually. Can anyone suggest the best method/programming language that could accomplish this?

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• Can I Use ASP.NET Wizard Control to Insert Data into Multiple Tables?

  - by SidC

  Hello All, I have an ASP.NET 3.5 webforms project written in VB that involves a multi-table SQL Server insert. That is, I want the customer to input all their contact information, order details etc. into one control (thinking wizard control). Then, I want to call a stored procedure that does the insert into the respective database tables. I'm familiar and comfortable with the ASP.NET wizard control. However, all the examples I've seen in my searches pertain to inserting data into one table. Questions: 1. Given a typical order process - customer information, order information, order details - should a wizard control be used to insert data into multiple database tables? If not, what controls/workflow do you suggest? 2. I've set primary keys and indexes on my order details, orders and customers tables. Is there special stored procedure syntax to use to ensure that referential integrity is maintained through the insert process? Thanks, Sid

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• PHP Convert variable names to lowercase?

  - by VeeBee

  I have an api listener script which takes in get parameters. But I seem to be having issues when users tend to pass mixed case variable names on the parameters. For example: http://mylistenerurl.com?paramName1=Hello&paramname2=World I need my listener to be flixible in such a way that the variable names will be interpreted case-insensitively or rather still all in lower case like after I process the query string on some function, they are all returned as lower-cased variables: extract(someFunction($_GET)); process($paramname1, $paramname2); Can anybody shed some light on this? *much appreciated. thanks!

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