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  • java.lang.NoSuchMethodError: main when starting HelloWorld with Eclipse Scala plugin

    - by Matt Sheppard
    I've just been playing with Scala, and installed the Eclipse plugin as described at http://www.scala-lang.org/node/94, but after entering the "Hello World" test example and setting up the run configuration as described, I get the following error Exception in thread "main" java.lang.NoSuchMethodError: main For reference the code is package hello object HelloWorld extends Application { println("Hello World!") } I've tinkered a bit with the obvious solutions (adding a main method, adding a singleton object with a main method) but I'm clearly doing something wrong. Can anyone get their test example to work, or point out what I am doing wrong?

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  • Logging strategy vs. performance

    - by vtortola
    Hi, I'm developing a web application that has to support lots of simultaneous requests, and I'd like to keep it fast enough. I have now to implement a logging strategy, I'm gonna use log4net, but ... what and how should I log? I mean: How logging impacts in performance? is it possible/recomendable logging using async calls? Is better use a text file or a database? Is it possible to do it conditional? for example, default log to the database, and if it fails, the switch to a text file. What about multithreading? should I care about synchronization when I use log4net? or it's thread safe out of the box? In the requirements appear that the application should cache a couple of things per request, and I'm afraid of the performance impact of that. Cheers.

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  • Android Image Orientation Issue on Motorola Droid

    - by roundhill
    Hi there, Our app uses the gallery pick action to grab an image from the device to upload to a new blog post. We're seeing on the Moto Droid that images taken in portrait are being sent back to the app in landscape orientation so the image is sideways. AFAIK this only occurs on the Droid. Found this via google, but we need the full size image to be uploaded in the correct orientation so the solution doesn't work for us: http://groups.google.com/group/android-developers/browse_frm/thread/1246475fd4c3fdb6?pli=1 An easy way to reproduce this is to take a picture in portrait on the Droid, then send it to yourself via Gmail. In the email message, the image will be in landscape (sideways). I've tested on the droid 2.1 update and the issue is still there.

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  • Having Problems Getting FreeTTS and JSAPI Working

    - by Travis
    I have a simple project idea based off of FreeTTS and the JSAPI (Java Speech API) I've downloaded and unpacked FreeTTS and run their build script. Then tried compiling my code linking in the lib directory into the class path like this: javac -cp /home/travis/Desktop/freetts-1.2/lib HelloUnleashedReader.java Which then compiles to java bytecode just fine. However when I run: java HelloUnleashedReader I get the following error: Exception in thread "main" java.lang.NoClassDefFoundError: javax/speech/EngineModeDesc Any help on this issue would be greatly appreciated as there are many sites around the net discussing problems with getting it to work but not many that discuss their solution.

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  • MSB3422 Failed to retrieve VC project information through the VC project engine object model. MSB342

    - by Scott Langham
    I'm getting the following errors from MSBuild while trying to build a solution: C:\dev\MySln.sln : warning MSB3422: Failed to retrieve VC project information through the VC project engine object model. Unable to determine default tool for the specified file configuration. C:\dev\MySln.sln : warning MSB3425: Could not resolve VC project reference "C:\dev\MyProj.vcproj". Have you got any ideas on what's causing this? I've seen other postings about similar, but different errors such as when the MSB3422 error has a different message and shows "Illegal characters in path.", but I haven't seen any useful information about how to solve the error I'm getting where it says "Unable to determine default tool for the specified file configuration.". Thanks. I found this, but it doesn't really help: http://social.msdn.microsoft.com/Forums/en-US/msbuild/thread/b470f111-9321-4b43-8bd1-7fcf67c2d402

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  • Apache on linux : spawning processes or threads ?

    - by Jerome WAGNER
    Hello, I would like to understand better exactly what is going on when Apache on linux receive an HTTP request in a process pre-fork model. Let's say we have 20 Apache child processes waiting. When I receive an HTTP request, is it true to say that 1 child process will be chosen to handle the request and that this process won't handle another request from another user until the first one is finished ? I am asking the question because of a PHP limitation that states : The locale information is maintained per process, not per thread. If you are running PHP on a multithreaded server API like IIS or Apache on Windows, you may experience sudden changes in locale settings while a script is running, though the script itself never called setlocale(). This happens due to other scripts running in different threads of the same process at the same time, changing the process-wide locale using setlocale(). Thanks Jerome Wagner

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  • How can I set up .NET UnhandledException handling in a Windows service?

    - by Mike Pateras
    protected override void OnStart(string[] args) { AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException); Thread.Sleep(10000); throw new Exception(); } void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e) { } I attached a debugger to the above code in my windows service, setting a breakpoint in CurrentDomain_UnhandledException, but it was never hit. The exception pops up saying that it is unhandled, and then the service stops. I even tried putting some code in the event handler, in case it was getting optimized away. Is this not the proper way to set up unhandled exception handling in a windows service?

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  • How to disable localization of errors in Visual Studio?

    - by MartyIX
    I use Visual Studio 2008 and it really makes me crazy how it shows error messages (in Error List window, Output window - especially exceptions) partially in English and partially in my native language. Interestingly, it is worse in WPF than in WinForms project. I've read here that it is about Culture of the running thread (so that the problem is in a settings for .NET). Why am I solving it? It's simple because if I run into an error message and I don't know what it exactly mean or how to fix the problem then trying to google the problem in any other language than in English is very problematic. For example, it would be useful to set English for debugging purposes. How to solve the problem? Thanks for any suggestion!

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  • How to test localized winforms application?

    - by Sun
    Background: I have created sample windows application for learning to implement localization. My each form has two RESX file. One for Bulgaria and one for French(Belgium). It has default culture English(XX) To test locally currently I am programmatically changing UICulture i.e. Thread.CurrentThread.CurrentUICulture = new CultureInfo("fr-BE"); And it works fine. Problem: How can I test without forcing the UI Culture programatically? I have tried changing Control Panel Regional Options Standard and Formats to French(Belgium). That made changes to DatePickerControl and now it display the dates French. However I can still see the Button text in English, where as if I test by injecting CultureInfo programmatically it changes to french. If I am able to change the standard and formats to French do I still need to Install Multilingual User Interface Pack (MUI)?

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  • how to see my managed objects on the stack?

    - by smwikipedia
    I use SOS.dll in VisualStudio to debug my C# program. The program is as below. The debug command is !DumpStackObjects. class Program { static void Main() { Int32 result = f(1); } static Int32 f(Int32 i) { Int32 j = i + 1; return j; <===========BreakPoint is here } } After I input the "!dso" command in the immediate window of Visual Studio, the result is as below: OS Thread Id: 0xf6c (3948) ESP/REG Object Name Why there's nothing? I thought there should be the args i and local variable j. Thanks for my answering my naive questions...

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  • .NET sendkeys to calculator

    - by user203123
    The sendkeys code below works well for Notepad but it doesn't work for Calculator. What is the problem? (It's another problem compared to what I sent here http://stackoverflow.com/questions/2604486/c-sendkeys-problem) [DllImport("user32.dll", CharSet = CharSet.Unicode)] public static extern IntPtr FindWindow(string lpClassName,string lpWindowName); [DllImport("User32")] public static extern bool SetForegroundWindow(IntPtr hWnd); private void button1_Click(object sender, EventArgs e) { IntPtr calculatorHandle = FindWindow("SciCalc", "Calculator"); //IntPtr calculatorHandle = FindWindow("Notepad", "Untitled - Notepad"); if (calculatorHandle == IntPtr.Zero) { MessageBox.Show("Calculator is not running."); return; } SetForegroundWindow(calculatorHandle); System.Threading.Thread.Sleep(1000); SendKeys.SendWait("111*11="); //SendKeys.SendWait("{ENTER}"); //cnt++; SendKeys.Flush(); }

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  • Exception while running Quartz Schdular program

    - by Sunny Mate
    hi, i am getting he following Exception while running my Quartz Schdular program. Below is the exception Trace Mar 26, 2010 2:54:24 PM org.quartz.core.QuartzScheduler start INFO: Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED started. Exception in thread "main" java.lang.IllegalArgumentException: Job class must implement the Job interface. at org.quartz.JobDetail.setJobClass(JobDetail.java:291) at org.quartz.JobDetail.(JobDetail.java:138) at com.Quarrtz.RanchSchedule.main(RanchSchedule.java:18) i have included Quartz-1.7.2.jar and Quartz-all-1.7.2.jar in my class path along with commom-logging 1.1.jar and jdk 6 this is an example i have copy and pasted from JAVA RANCH http://www.javaranch.com/journal/200711/combining_spring_and_quartz.html First example in the above page any help pls thanx in advance Sunny Mate

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  • Reflection Permission problems when using the GSON library in a applet.

    - by mridang
    I'm writing an Applet that makes some JSON-RPC calls. I'm using the Google JSON library (GSON) to cast the response JSON into a class. Thsi seems to work fine as is but when I use this code in my Applet, I'm hit with a java.lang.reflect.reflectpermission. From what I read on this thread on SO, it seems that since GSON uses Reflection, I cannot use it in Applets unless I explicitly modify the security policy. How can I get around this? I've created a bunch of classes in my application and was using the Gson.fromJson method to cast it into the class. Is there any way to achieve the same functionality without having to re-write half my code. (The complexity of dealing with JSON in Java seems to be in a league of its own!) Thanks in advance guys.

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  • Using PostRequestHandlerExecute, Flush and Close to clean up after a request - why is this bad?

    - by Erwin
    After some requests I need to clean up after the user - by calling a remote web service to release some resources if I guess the user doesn't need them anymore. It is ok to leave them hanging and letting them time out on the other server, but the polite thing to do is to inform it that I do not need them anymore. I do not want to waste the users time waiting for cleaning - so I tried to find place to put it. First I tried Application_EndRequest, but I needed something later. Then I found PostRequestHandlerExecute which seemed like a nice place, but I still need a Flush and Close to release the connection to the user. Protected Sub Application_PostRequestHandlerExecute(ByVal sender As Object, ByVal e As System.EventArgs) Response.Flush() Response.Close() ' Simulation of clean up activity: System.Threading.Thread.Sleep(4000) ' Really a couple of web service calls End Sub Is there some other place I could put these lengthy clean up routines?

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  • XML Validation

    - by Keya
    Hi, I want to validate an XML file against RELAXNG schema provided. Searching on the net gave me hints to create a Schema instance using SchemaFactory by providing the appropriate Schema Language. So as per my requirement I used: *SchemaFactory.newInstance(XMLConstants.RELAXNG_NS_URI);* But the following exception was thrown at run: Exception in thread "main" java.lang.IllegalArgumentException: No SchemaFactory that implements the schema language specified by: http://relaxng.org/ns/structure/1.0 could be loaded at javax.xml.validation.SchemaFactory.newInstance(SchemaFactory.java:207) I am using Java6 and observed that only 'W3C_XML_SCHEMA_NS_URI' works. Rest all the schema URIs throws the similar exception. I am fairly new to using the XML validation APIs. Can someone please provide me the appropriate usage in case I am not doing it correctly? Thanks & Regards, Keya

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  • SharedPreferences.onSharedPreferenceChangeListener not being called consistently

    - by synic
    I'm registering a preference change listener like this (in the onCreate() of my main activity): SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this); prefs.registerOnSharedPreferenceChangeListener( new SharedPreferences.OnSharedPreferenceChangeListener() { public void onSharedPreferenceChanged( SharedPreferences prefs, String key) { System.out.println(key); } }); The trouble is, the listener is not always called. It works for the first few times a preference is changed, and then it is no longer called until I uninstall and reinstall the app. No amount of restarting the application seems to fix it. I found a mailing list thread reporting the same problem, but no one really answered him. What am I doing wrong?

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  • Validate a single property with the Fluent Validation Library for .Net

    - by Blegger
    Can you validate just a single property with the Fluent Validation Library, and if so how? I thought this discussion thread from January of 2009 showed me how to do it via the following syntax: validator.Validate(new Person(), x => x.Surname); Unfortunately it doesn't appear this works in the current version of the library. One other thing that led me to believe that validating a single property might be possible is the following quote from Jeremy Skinners' blog post: "Finally, I added the ability to be able to execute some of FluentValidation’s Property Validators without needing to validate the entire object. This means it is now possible to stop the default “A value was required” message from being added to ModelState. " However I do not know if that necessarily means it supports just validating a single property or the fact that you can tell the validation library to stop validating after the first validation error.

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  • How can I make the Telerik progress bar work?

    - by Darien Fawkes
    I have a Telerik progress bar in my project: <telerik:RadProgressManager ID="RadProgressManager" Runat="server" /> <telerik:RadProgressArea ID="RadProgressArea" Runat="server"></telerik:RadProgressArea> <asp:button id="Button1" runat="server" text="Submit" /> On button click I try to run this method: private void MethodWhichUpdatesTheProgressContext(UploadedFile file, int countFile) { const int total = 100; RadProgressContext ProgressContex = RadProgressContext.Current; ProgressContex.SecondaryTotal = "100"; for (int i = 0; i < total; i++) { ProgressContex.CurrentOperationText = "Uploading zip file percentage " + i.ToString(); if (!Response.IsClientConnected) { break; } System.Threading.Thread.Sleep(100); } } Project builds without any errors but progress doesn't change. How do I properly fire the progress bar animation? If I put this progress bar on control, it can effect this?

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  • how can i overriding the inbound message validation with cxf?

    - by user1648330
    when i input a non-numeric content to a Integer types of field, i have got a fault mesasge 'Not a number: 0.012A'. How to do ability to in prior to the Unmarshal for schema validation and output custom error messages? I used cxf 2.6.1 and also configuration with <entry key="schema-validation-enabled" value="true" ></entry> in cxf-spring.xml. java.lang.RuntimeException: Not a number: 0.012A at com.jiemai.jmservice.handlers.ValidationEventHandler.handleEvent(ValidationEventHandler.java:19) at org.apache.cxf.jaxb.io.DataReaderImpl$WSUIDValidationHandler.handleEvent(DataReaderImpl.java:78) at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.handleEvent(UnmarshallingContext.java:655) at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.handleError(UnmarshallingContext.java:691) at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.handleError(UnmarshallingContext.java:687) at com.sun.xml.bind.v2.runtime.unmarshaller.Loader.handleParseConversionException(Loader.java:271) at com.sun.xml.bind.v2.runtime.unmarshaller.LeafPropertyLoader.text(LeafPropertyLoader.java:69) at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.text(UnmarshallingContext.java:514) at com.sun.xml.bind.v2.runtime.unmarshaller.InterningXmlVisitor.text(InterningXmlVisitor.java:93) at com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.processText(StAXStreamConnector.java:338) at com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.handleEndElement(StAXStreamConnector.java:216) at com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.bridge(StAXStreamConnector.java:185) at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:370) at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:349) at org.apache.cxf.jaxb.JAXBEncoderDecoder.doUnmarshal(JAXBEncoderDecoder.java:784) at org.apache.cxf.jaxb.JAXBEncoderDecoder.access$100(JAXBEncoderDecoder.java:97) at org.apache.cxf.jaxb.JAXBEncoderDecoder$1.run(JAXBEncoderDecoder.java:812) at java.security.AccessController.doPrivileged(Native Method) at org.apache.cxf.jaxb.JAXBEncoderDecoder.unmarshall(JAXBEncoderDecoder.java:810) at org.apache.cxf.jaxb.JAXBEncoderDecoder.unmarshall(JAXBEncoderDecoder.java:644) at org.apache.cxf.jaxb.io.DataReaderImpl.read(DataReaderImpl.java:157) at org.apache.cxf.interceptor.DocLiteralInInterceptor.handleMessage(DocLiteralInInterceptor.java:108) at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:262) at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:122) at org.apache.cxf.transport.http.AbstractHTTPDestination.invoke(AbstractHTTPDestination.java:211) at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:213) at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:193) at org.apache.cxf.transport.servlet.CXFNonSpringServlet.invoke(CXFNonSpringServlet.java:129) at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:187) at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doPost(AbstractHTTPServlet.java:110) at javax.servlet.http.HttpServlet.service(HttpServlet.java:710) at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:166) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Unknown Source)

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  • ASP.NET / WCF - Execute Server.Execute Asynchronously

    - by user208662
    Hello, I need to run the HttpContext.Current.Server.Execute method in my ASP.NET application. This application has a WCF operation that does some processing. Currently, I am to do my processing correctly from within my WCF operation. However, I would like to do this asynchronously. In an error to attempt this asynchronously, I tried running Server.Execute in the DoWork event handler of a BackgroundWorker. Unfortunately, this throws an error that says "object reference not set to an instance of an object" The HttpContext element is not null. I checked that. It is some property nested in the HttpContext object that appears to be null. However, I have not been able to identify why this won't work. It happens as soon as I move the processing to the BackgroundWorker thread. My question is, how can I asynchronously execute the Server.Execute method? Thank you,

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  • Forbidden Not authorized to access this feed

    - by user302593
    Hai, I want to create a sites by using java programming. but it contain error like this... Exception in thread "main" com.google.gdata.util.ServiceForbiddenException: Forbidden Not authorized to access this feed at com.google.gdata.client.http.HttpGDataRequest.handleErrorResponse(HttpGDataRequest.java:561) at com.google.gdata.client.http.GoogleGDataRequest.handleErrorResponse(GoogleGDataRequest.java:563) at com.google.gdata.client.http.HttpGDataRequest.checkResponse(HttpGDataRequest.java:536) at com.google.gdata.client.http.HttpGDataRequest.execute(HttpGDataRequest.java:515) at com.google.gdata.client.http.GoogleGDataRequest.execute(GoogleGDataRequest.java:535) at com.google.gdata.client.Service.getFeed(Service.java:1073) at com.google.gdata.client.Service.getFeed(Service.java:936) at com.google.gdata.client.GoogleService.getFeed(GoogleService.java:631) at com.google.gdata.client.Service.getFeed(Service.java:955) at lsites.getSiteFeed(lsites.java:25) at lsites.main(lsites.java:40) what i want to do? Regards, Bhuvana

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  • Scala Actors with Java interop to underlying COM libraries

    - by wheaties
    I'm working on a JVM project which uses ESRI components (COM based, wrapped with JIntegra.) The client has requested the JAR files we produce work on the JVM and be accessible to Java code. I'd like to use Scala but I'm worried about how well the library will play with Scala's actors. Particularly I'm worried about the different mechanisms COM and Java employ to pass objects from one thread to another. Does anyone have any experience with this? Will they play nice? Edit: for clarification I noticed that when performing I/O on the ESRI DB that the CPU utilization is roughly 15%. I'd like to read each row and pass that row over to another actor for parsing. Then I could have several threads reading from the DB at once. The problem is that each row retrieved using ESRI's library is actually a Java wrapped COM object.

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  • How to write Asynchronous LINQ query?

    - by Morgan Cheng
    After I read a bunch of LINQ related stuff, I suddenly realized that no articles introduce how to write asynchronous LINQ query. Suppose we use LINQ to SQL, below statement is clear. However, if the SQL database responds slowly, then the thread using this block of code would be hindered. var result = from item in Products where item.Price > 3 select item.Name; foreach (var name in result) { Console.WriteLine(name); } Seems that current LINQ query spec doesn't provide support to this. Is there any way to do asynchronous programming LINQ? It works like there is a callback notification when results are ready to use without any blocking delay on I/O.

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  • Error using ASP.NET 3.5 Chart control within a Repeater control

    - by tuseau
    Hi, I'm getting the error "Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: Error executing child request for ChartImg.axd" at runtime from my Chart control. I have read one solution to this error message as documented here: http://social.msdn.microsoft.com/Forums/en-US/MSWinWebChart/thread/1dc4b352-c9a5-49dc-8f35-9b176509faa1/ but this does not solve my problem. I have the Chart within a Repeater control, which is within an ajax UpdatePanel. When I take the chart out of the Repeater (but leave it in the UpdatePanel), it works. So I'm thinking it is to do with the Repeater. Anyone got any ideas? Thanks in advance.

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  • C# sendkeys to calculator

    - by user203123
    The sendkeys code below works well for Notepad but it doesn't work for Calculator. What is the problem? (It's another problem compared to what I sent here http://stackoverflow.com/questions/2604486/c-sendkeys-problem) [DllImport("user32.dll", CharSet = CharSet.Unicode)] public static extern IntPtr FindWindow(string lpClassName,string lpWindowName); [DllImport("User32")] public static extern bool SetForegroundWindow(IntPtr hWnd); private void button1_Click(object sender, EventArgs e) { IntPtr calculatorHandle = FindWindow("SciCalc", "Calculator"); //IntPtr calculatorHandle = FindWindow("Notepad", "Untitled - Notepad"); if (calculatorHandle == IntPtr.Zero) { MessageBox.Show("Calculator is not running."); return; } SetForegroundWindow(calculatorHandle); System.Threading.Thread.Sleep(1000); SendKeys.SendWait("111*11="); //SendKeys.SendWait("{ENTER}"); //cnt++; SendKeys.Flush(); }

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