[jbosstools-issues] [JBoss JIRA] (JBIDE-17528) 'Widget is disposed' exception in JBoss Central

[Denis Golovin (JIRA)]

Denis Golovin created JBIDE-17528:
-------------------------------------

             Summary: 'Widget is disposed' exception in JBoss Central
                 Key: JBIDE-17528
                 URL: https://issues.jboss.org/browse/JBIDE-17528
             Project: Tools (JBoss Tools)
          Issue Type: Bug
          Components: central
    Affects Versions: 4.2.0.Beta2
            Reporter: Denis Golovin
            Priority: Minor
             Fix For: 4.2.0.Beta3


{code}org.eclipse.swt.SWTException: Failed to execute runnable (org.eclipse.swt.SWTException: Widget is disposed)
	at org.eclipse.swt.SWT.error(SWT.java:4441)
	at org.eclipse.swt.SWT.error(SWT.java:4356)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:139)
	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3781)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3419)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1152)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1033)
	at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:148)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:635)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:578)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:135)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:379)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:233)
	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:606)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1465)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1438)
Caused by: org.eclipse.swt.SWTException: Widget is disposed
	at org.eclipse.swt.SWT.error(SWT.java:4441)
	at org.eclipse.swt.SWT.error(SWT.java:4356)
	at org.eclipse.swt.SWT.error(SWT.java:4327)
	at org.eclipse.swt.widgets.Widget.error(Widget.java:476)
	at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:413)
	at org.eclipse.swt.widgets.Composite.getChildren(Composite.java:610)
	at org.jboss.tools.central.editors.GettingStartedPage.disposeChildren(GettingStartedPage.java:1124)
	at org.jboss.tools.central.editors.GettingStartedPage.addProxyWizardLinks(GettingStartedPage.java:533)
	at org.jboss.tools.central.editors.GettingStartedPage.access$12(GettingStartedPage.java:531)
	at org.jboss.tools.central.editors.GettingStartedPage$5$1.run(GettingStartedPage.java:520)
	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:136)
	... 24 more{code}

It happens because of WIzard Links area is populated in delayed async execution and if download is long enough central editor can get closed before deferred UI processing started. 

Simple solution is check that central is still opened after getProxyWizards()  called and to modify async exec so it check if widget is disposed before doing any UI manipulations in central editor. 



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