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Xtext plugin and context menu handler issue [message #1333991]

Mon, 05 May 2014 06:35

Eclipse User

Hi,
I create an xtext plugin and i followed the C. Dietrich tutorial (http://goo.gl/Ua3fyC) to call the Xtext generator from the
context menu. Then i deployied the plugin and tested the plugin into a new fresh eclipse installation. When I call
the generator from the context menu i get an "Unhandled event loop exception" with this message:

org.eclipse.e4.core.di.InjectionException: org.eclipse.core.commands.NotHandledException: There is no handler to execute for command org.xtext.passi.DocGen.ui.GenerationCommand
	at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:63)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:231)
	at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:212)
	at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:131)
	at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:171)
	at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.executeItem(HandledContributionItem.java:831)
	at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.handleWidgetSelection(HandledContributionItem.java:724)
	at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.access$7(HandledContributionItem.java:708)
	at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem$4.handleEvent(HandledContributionItem.java:647)
	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4169)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3758)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1053)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:942)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
	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(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	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)
Caused by: org.eclipse.core.commands.NotHandledException: There is no handler to execute for command org.xtext.passi.DocGen.ui.GenerationCommand
	at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:84)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56)
	... 33 more

Any idea??

Re: Xtext plugin and context menu handler issue [message #1334020 is a reply to message #1333991]

Mon, 05 May 2014 06:52

Eclipse User

Hi,

your config in plugin.xml is incorrect. make sure you define both command and handler

btw the tutorial is for eclipse 3.x style handlers

[Updated on: Mon, 05 May 2014 06:52] by Moderator

Re: Xtext plugin and context menu handler issue [message #1336006 is a reply to message #1334020]

Tue, 06 May 2014 03:30

Eclipse User

this is what've done: i disabled the extension point

org.eclipse.xtext.builder.participant

, then i added the command
and the handler in this way:

<extension point="org.eclipse.ui.commands">
		<command 
			name="Generate Documentation" 
			id="org.xtext.passi.DocGen.ui.GenerationCommand">
		</command>
	</extension>
	
<extension point="org.eclipse.ui.handlers">
<handler
	class="org.xtext.passi.ui.DocGenExecutableExtensionFactory:org.xtext.passi.DocGen.ui.GenerationHandler"          
	commandId="org.xtext.passi.DocGen.ui.GenerationCommand">    
</handler> 
</extension>

then i added the context menu voice, but for all the types of files:

<extension point="org.eclipse.ui.menus">
   <menuContribution locationURI="popup:org.eclipse.jdt.ui.PackageExplorer">       
	  <command 
		commandId="org.xtext.passi.DocGen.ui.GenerationCommand" 
		style="push"> 
	  </command>   
	</menuContribution>   
</extension>

The class GenerationHandler extends AbstractHandler and implements the interface IHandler, as shown below.

public class GenerationHandler extends AbstractHandler implements IHandler
{

	@Inject
	private IGenerator generator;
	
	@Inject
	private Provider<EclipseResourceFileSystemAccess2> fileAccessProvider;
	
	@Inject
	IResourceDescriptions resourceDescriptions;
	
	@Inject
	IResourceSetProvider resourceSetProvider;

	/**
	 * Used to call manual documentation generation from the context menu
	 */
	public Object execute(ExecutionEvent event) throws ExecutionException
	{
	
		ISelection selection = HandlerUtil.getCurrentSelection(event); 
		if (selection instanceof IStructuredSelection)
		{
			IStructuredSelection structuredSelection = (IStructuredSelection) selection;
			
			Object firstElement = structuredSelection.getFirstElement();
		
			if (firstElement instanceof IFile)
			{
				IFile file = (IFile) firstElement; 
				IProject project = file.getProject();
				
				final EclipseResourceFileSystemAccess2 fsa = fileAccessProvider.get();
				
				URI uri = URI.createPlatformResourceURI(file.getFullPath().toString(), true);
				ResourceSet rs = resourceSetProvider.get(project); 
				Resource r = rs.getResource(uri, true); 
				
				generator.doGenerate(r, fsa);
			}
		}
		return null;
	}

	@Override
	public boolean isEnabled()
	{
		return true;
	
	}
}

edit: In plugin.xml_gen were missing the command and handler definition so I added there, but nothing changed.

[Updated on: Tue, 06 May 2014 03:59] by Moderator

Re: Xtext plugin and context menu handler issue [message #1336092 is a reply to message #1336006]

Tue, 06 May 2014 04:20

Eclipse User

Hi, this looks strange. are you sure there arent any other issues?

Re: Xtext plugin and context menu handler issue [message #1336110 is a reply to message #1336092]

Tue, 06 May 2014 04:34

Eclipse User

Don't really know. When i execute the plugin from within eclipse (Run as Eclipse application) it works, but i have this problem only when i deploy the entire plugin and test into a new eclipse installation. I checked the requirement but I think it's all ok: I installed xtext,graphiti, xtend and xcore. I think that the plugin should not be loaded at all if there was something missing. But instead I got the context menu voice "Generate Documentation" of my plugin, so I think it's ok...

Re: Xtext plugin and context menu handler issue [message #1336188 is a reply to message #1336110]

Tue, 06 May 2014 05:19

Eclipse User

make sure you dont have any warnings in the build.properties of the plugins
make sure the plugins start (via (host) osgi console)

Re: Xtext plugin and context menu handler issue [message #1336290 is a reply to message #1336188]

Tue, 06 May 2014 06:17

Eclipse User

Quote:

make sure the plugins start (via (host) osgi console)

how?

Re: Xtext plugin and context menu handler issue [message #1336300 is a reply to message #1336290]

Tue, 06 May 2014 06:21

Eclipse User

Hi this is not Xtext specific you can start any eclipse with console
and you can open the host OSGi console in the console view

--
Need training, onsite consulting or any other kind of help for Xtext?
Go visit http://xtext.itemis.com or send a mail to xtext at itemis dot de

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