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Home » Eclipse Projects » Eclipse 4 » How to catch unhandled exceptions in e4?(Handling all uncatched exceptions)
How to catch unhandled exceptions in e4? [message #1441097] Thu, 09 October 2014 08:57 Go to next message
Alex Kipling is currently offline Alex KiplingFriend
Messages: 260
Registered: July 2012
Senior Member
I would like to catch unhandled exceptions in my e4 application.

What I did was:
1. adding a Thread.UncaughtExceptionHandler to the main thread
2. installing a Handler on the extension Point org.eclipse.ui.statusHandlers

Both was not triggered on throwing a NullPointerException,

Question:
how can I push to the log any exception occured on any thread, spawned by my e4 application?

Code which I used to add a Thread.UncaughtExceptionHandler
        Thread.UncaughtExceptionHandler h = new Thread.UncaughtExceptionHandler() {
            @Override
            public void uncaughtException(Thread th, Throwable ex) {
                System.out.println("Uncaught exception: " + ex);
                LOG.error(
                        String.format("Uncaught exception occured on thread with name %s and id %s", th.getName(),
                                th.getId()), ex);
            }
        };
        Thread.currentThread().setUncaughtExceptionHandler(h);
        Thread.setDefaultUncaughtExceptionHandler(h);

        // TODO alf del
        if (true) {
            throw new NullPointerException();
        }
Re: How to catch unhandled exceptions in e4? [message #1441186 is a reply to message #1441097] Thu, 09 October 2014 11:15 Go to previous message
Alex Kipling is currently offline Alex KiplingFriend
Messages: 260
Registered: July 2012
Senior Member
Does someone know what is reposible for logging the workbench exceptions to console?
Is there a possibility to log those messages to my own log?

!ENTRY org.eclipse.e4.ui.workbench 4 0 2014-10-09 13:10:02.560
!MESSAGE Unable to create class 'de.ivu.fare.rcp.swt.parts.shellTwo.Shell' from bundle '5'
!STACK 0
org.eclipse.e4.core.di.InjectionException: java.lang.NullPointerException
	at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:63)
	at org.eclipse.e4.core.internal.di.InjectorImpl.processAnnotated(InjectorImpl.java:859)
	at org.eclipse.e4.core.internal.di.InjectorImpl.inject(InjectorImpl.java:111)
	at org.eclipse.e4.core.internal.di.InjectorImpl.internalMake(InjectorImpl.java:319)
	at org.eclipse.e4.core.internal.di.InjectorImpl.make(InjectorImpl.java:240)
	at org.eclipse.e4.core.contexts.ContextInjectionFactory.make(ContextInjectionFactory.java:161)
	at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.createFromBundle(ReflectionContributionFactory.java:102)
	at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.doCreate(ReflectionContributionFactory.java:71)
	at org.eclipse.e4.ui.internal.workbench.ReflectionContributionFactory.create(ReflectionContributionFactory.java:53)
	at org.eclipse.e4.ui.workbench.renderers.swt.ContributedPartRenderer.createWidget(ContributedPartRenderer.java:141)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createWidget(PartRenderingEngine.java:896)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:630)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:732)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:703)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:697)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:682)
	at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:59)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:642)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:732)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:703)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:697)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:682)
	at org.eclipse.e4.ui.workbench.renderers.swt.SWTPartRenderer.processContents(SWTPartRenderer.java:59)
	at org.eclipse.e4.ui.workbench.renderers.swt.WBWRenderer.processContents(WBWRenderer.java:639)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:642)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.safeCreateGui(PartRenderingEngine.java:732)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.access$2(PartRenderingEngine.java:703)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$7.run(PartRenderingEngine.java:697)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.createGui(PartRenderingEngine.java:682)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:964)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:923)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
	at org.eclipse.e4.ui.internal.workbench.swt.E4Application.start(E4Application.java:150)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1414)
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