I recently saw this exception. It appeared to be caused by having two elements with the same id in the model.
Cheers, Wim On Thu, Dec 5, 2013 at 9:52 PM, Laurent PETIT <[email protected]>wrote: > Current status: > > I adopted the EventBroker + APP_STARTUP_COMPLETE option: In my Model > Processor class, I just register for the APP_STARTUP_COMPLETE event > and then in the callback function I dynamically modify the model like > this: > > ;; file ~/.ccw/script.clj > ;; boring namespace declaration and imports omitted > (defn greet [context] > (info-dialog "Hello world" "This popup provided to you from a user > script")) > > (defcommand greeter "Hello from CCW") > > (defhandler greeter greet) > > (defkeybinding greeter "Ctrl+Alt+Y") > > The callback triggered from the APP_STARTUP_COMPLETE event localizes > user scripts in ~/.ccw and executes them. > > The defcommand / defhandler / defkeybinding try as much as possible to > reuse existing commands/handlers/keybindings in the Model based on > identifiers (command, handler) or field values (keybinding). > > The tag "ccw" is added to every command/handler/keybinding object > merged. There's also a randomUUID set as the value of the key > "ccw/load-key" in the Transient State. > > Once the user script has been loaded, all > commands/handlers/keybindings in the Application Model with tag "ccw" > are gathered. Those that do not have a transient "ccw/load-key" key, > or a transient "ccw/load-key" key with the wrong value are removed > from the Application Model (the latter case is for being able to > live-reload the user scripts while developing, and still keeping the > Application Model clean). > > Overall, works already quite well. > > I thought this was the time to get some feedback from e4 experts on > what I already did. > > I also have a question: I keep getting an exception stack trace, even > in the simplest scenario, while the user script starts. > > I the simplest case, it happens when I only have (defcommand ...) and > (defhandler ...), even on a cleaned workspace + -clearPersistedState > option set. > > I don't know what it means, and my mind isn't clear as to how I could > investigate more: > > !ENTRY org.eclipse.equinox.event 4 0 2013-12-05 21:37:30.658 > > !MESSAGE Exception while dispatching event > org.osgi.service.event.Event > [topic=org/eclipse/e4/ui/model/application/Contribution/object/SET] to > handler org.eclipse.e4.ui.services.internal.events.UIEventHandler@7e11b954 > > !STACK 0 > > java.lang.ClassCastException: > org.eclipse.e4.ui.model.application.commands.impl.HandlerImpl cannot > be cast to org.eclipse.e4.ui.model.application.ui.MUIElement > > at > org.eclipse.ui.internal.WorkbenchPage$5.handleEvent(WorkbenchPage.java:4949) > > at > org.eclipse.e4.ui.services.internal.events.UIEventHandler$1.run(UIEventHandler.java:41) > > at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:180) > > at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:150) > > at org.eclipse.swt.widgets.Display.syncExec(Display.java:4650) > > at > org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:205) > > at > org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:38) > > at > org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:197) > > at > org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:197) > > at > org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1) > > at > org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) > > at > org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148) > > at > org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:135) > > at > org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:78) > > at > org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:39) > > at > org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:80) > > at > org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:58) > > at > org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:374) > > at > org.eclipse.e4.ui.model.application.impl.ContributionImpl.setObject(ContributionImpl.java:131) > > at > org.eclipse.e4.ui.internal.workbench.addons.HandlerProcessingAddon.processActiveHandler(HandlerProcessingAddon.java:158) > > at > org.eclipse.e4.ui.internal.workbench.addons.HandlerProcessingAddon.access$0(HandlerProcessingAddon.java:151) > > at > org.eclipse.e4.ui.internal.workbench.addons.HandlerProcessingAddon$1.handleEvent(HandlerProcessingAddon.java:80) > > at > org.eclipse.e4.ui.services.internal.events.UIEventHandler$1.run(UIEventHandler.java:41) > > at org.eclipse.swt.widgets.Synchronizer.syncExec(Synchronizer.java:180) > > at org.eclipse.ui.internal.UISynchronizer.syncExec(UISynchronizer.java:150) > > at org.eclipse.swt.widgets.Display.syncExec(Display.java:4650) > > at > org.eclipse.e4.ui.internal.workbench.swt.E4Application$1.syncExec(E4Application.java:205) > > at > org.eclipse.e4.ui.services.internal.events.UIEventHandler.handleEvent(UIEventHandler.java:38) > > at > org.eclipse.equinox.internal.event.EventHandlerWrapper.handleEvent(EventHandlerWrapper.java:197) > > at > org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:197) > > at > org.eclipse.equinox.internal.event.EventHandlerTracker.dispatchEvent(EventHandlerTracker.java:1) > > at > org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230) > > at > org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148) > > at > org.eclipse.equinox.internal.event.EventAdminImpl.dispatchEvent(EventAdminImpl.java:135) > > at > org.eclipse.equinox.internal.event.EventAdminImpl.sendEvent(EventAdminImpl.java:78) > > at > org.eclipse.equinox.internal.event.EventComponent.sendEvent(EventComponent.java:39) > > at > org.eclipse.e4.ui.services.internal.events.EventBroker.send(EventBroker.java:80) > > at > org.eclipse.e4.ui.internal.workbench.UIEventPublisher.notifyChanged(UIEventPublisher.java:58) > > at > org.eclipse.emf.common.notify.impl.BasicNotifierImpl.eNotify(BasicNotifierImpl.java:374) > > at > org.eclipse.emf.ecore.util.EcoreEList.dispatchNotification(EcoreEList.java:249) > > at > org.eclipse.emf.common.notify.impl.NotifyingListImpl.addUnique(NotifyingListImpl.java:356) > > at org.eclipse.emf.common.util.AbstractEList.add(AbstractEList.java:339) > > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) > > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > > at java.lang.reflect.Method.invoke(Method.java:601) > > at clojure.lang.Reflector.invokeMatchingMethod(Reflector.java:93) > > at clojure.lang.Reflector.invokeInstanceMethod(Reflector.java:28) > > at ccw.util.e4.model$add_handler_BANG_.invoke(model.clj:653) > > at ccw.util.e4.model$merge_handler_BANG_.invoke(model.clj:800) > > at lein_script_test$fn__2851.invoke(script.clj:11) > > at clojure.lang.AFn.applyToHelper(AFn.java:159) > > at clojure.lang.AFn.applyTo(AFn.java:151) > > at clojure.lang.Compiler$InvokeExpr.eval(Compiler.java:3458) > > at clojure.lang.Compiler$DefExpr.eval(Compiler.java:408) > > at clojure.lang.Compiler.eval(Compiler.java:6624) > > at clojure.lang.Compiler.load(Compiler.java:7064) > > at clojure.lang.Compiler.loadFile(Compiler.java:7020) > > at clojure.lang.RT$3.invoke(RT.java:318) > > at > ccw.core.user_plugins$start_user_plugins$fn__2833.invoke(user_plugins.clj:70) > > at ccw.core.user_plugins$start_user_plugins.invoke(user_plugins.clj:69) > > at clojure.lang.Var.invoke(Var.java:411) > > at ccw.util.ClojureUtils.invoke(ClojureUtils.java:28) > > at ccw.util.ClojureInvoker._(ClojureInvoker.java:18) > > at > ccw.core.Eclipse4ModelProcessor$1.handleEvent(Eclipse4ModelProcessor.java:45) > > at > org.eclipse.e4.ui.services.internal.events.UIEventHandler$1.run(UIEventHandler.java:41) > > at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) > > at > org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135) > > at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3976) > > at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3653) > > at > org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1113) > > at > org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) > > at > org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:997) > > at > org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:138) > > at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:610) > > at > org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) > > at > org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:567) > > at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150) > > 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:354) > > at > org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:181) > > 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:636) > > at org.eclipse.equinox.launcher.Main.basicRun(Main.java:591) > > at org.eclipse.equinox.launcher.Main.run(Main.java:1450) > > at org.eclipse.equinox.launcher.Main.main(Main.java:1426) > > > > > > > > 2013/12/2 Laurent PETIT <[email protected]>: > > Hey Paul, > > > > 2013/12/2 Paul Webster <[email protected]>: > >> Hi Laurent, > >> > >> On Mon, Dec 2, 2013 at 8:04 AM, Laurent PETIT <[email protected]> > >> wrote: > >>> > >>> I have considered it, not tried yet. > >>> > >>> So far, I have spotted in past discussions on the subject the > >>> following possibilities: > >>> > >>> 1/ EventBroker + APP_STARTUP_COMPLETE event => when to register to the > >>> EventBroker in the context of Eclipse the IDE? By doing it in my > >>> current Model Processor hook ? > >> > >> > >> Yes, we often use model processors to register for events (especially > >> related to model changes) for the application going forward. This is > the > >> Eclipse4 compatible approach. > > > > So I'll use this method, even if, as you pointed out, I will continue > > to live in a cross world between 3.x and 4.x APIs, since I won't be > > able to migrate all my code at once (and also I depend on so many > > things that are still stuck in the 3.x world, I guess ...) > > > >> > >>> > >>> 2/ Extend org.eclipse.ui.startup ? I have read that I am guaranteed > >>> that when my earlyStartup() method is called the Workbench is already > >>> totaly operational. But then how to get the MApplication instance? > >>> Currently I'm doing > >>> > >>> > PlatformUI.getWorkbench().getService(IEclipseContext.class).get(MApplication.class). > >> > >> > >> If you use org.eclipse.ui.startup, you've picked the right pattern. > This is > >> based on 3.x (o.e.ui.startup is not part of Eclipse4) but if you need > access > >> to things that need the Workbench, then you are tied to 3.x anyway. > >> > >>> > >>> 3/ Just use asyncExec on the display. But how to get the display > instance? > >> > >> > >> If you are running in the IDE (which has the Workbench) this is the > hardest > >> thing to get correct. Calling Display.getDefault() can instantiate a > >> display on the incorrect thread and cause problems. We use > >> org.eclipse.ui.IWorkbench.getDisplay() but that's then tied to 1) > running > >> against the 3.x Workbench and 2) waiting until the workbench is up, > which > >> happens after the model processor stuff is called. > >> > >> > >> Later, > >> Paul > >> > >> > >> > >> -- > >> Paul Webster > >> Hi floor. Make me a sammich! - GIR > >> > >> _______________________________________________ > >> e4-dev mailing list > >> [email protected] > >> https://dev.eclipse.org/mailman/listinfo/e4-dev > >> > _______________________________________________ > e4-dev mailing list > [email protected] > https://dev.eclipse.org/mailman/listinfo/e4-dev >
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