[news.eclipse.tools.gef] Re: UI SWTException: Invalid thread access dur

["Pratik Shah" <ppshah@xxxxxxxxxx>]

Put the code that needs UI thread access on the UI thread (look at
org.eclipse.swt.widgets.Display#syncExec() and asyncExec()).


"Brett Bock" <brett.bock@xxxxxxxxxxxxxxx> wrote in message
news:cne3g9$4r6$1@xxxxxxxxxxxxxxxxxx
> I'm wondering if this is a bug, and if it is not a bug, what would be the
> prefered method to fix this issue.  Below you can see a stack trace of the
> SWT exception.
>
> What we are doing here is using an org.eclipse.ui.newWizards wizard to
> create a new model element.  The actual creation may take a while so the
> creation of the model element has been placed into its own thread.
Creating
> the new model element then creates a command stack change, which sends an
> update to the editor, which calls into the framework to update the text
for
> the diagram name.  Since the name change is not in a UI thread we get the
> SWT exception.
>
> !ENTRY org.eclipse.core.runtime 4 2 2004-11-16 16:15:11.932
> !MESSAGE Problems occurred when invoking code from plug-in:
> "org.eclipse.core.runtime".
> !STACK 0
> org.eclipse.swt.SWTException: Invalid thread access
>  at org.eclipse.swt.SWT.error(SWT.java:2697)
>  at org.eclipse.swt.SWT.error(SWT.java:2622)
>  at org.eclipse.swt.SWT.error(SWT.java:2593)
>  at org.eclipse.swt.widgets.Widget.error(Widget.java:385)
>  at org.eclipse.swt.widgets.Widget.checkWidget(Widget.java:288)
>  at org.eclipse.swt.widgets.Widget.getData(Widget.java:415)
>  at
>
org.eclipse.ui.internal.presentations.defaultpresentation.DefaultTabFolder.g
> etTab(DefaultTabFolder.java:159)
>  at
>
org.eclipse.ui.internal.presentations.defaultpresentation.DefaultTabFolder.g
> etItems(DefaultTabFolder.java:211)
>  at
>
org.eclipse.ui.internal.presentations.newapi.AbstractTabFolder.findItem(Abst
> ractTabFolder.java:169)
>  at
>
org.eclipse.ui.internal.presentations.newapi.PresentablePartFolder.getTab(Pr
> esentablePartFolder.java:378)
>  at
>
org.eclipse.ui.internal.presentations.newapi.PresentablePartFolder.childProp
> ertyChanged(PresentablePartFolder.java:311)
>  at
>
org.eclipse.ui.internal.presentations.newapi.PresentablePartFolder.access$2(
> PresentablePartFolder.java:310)
>  at
>
org.eclipse.ui.internal.presentations.newapi.PresentablePartFolder$3.propert
> yChanged(PresentablePartFolder.java:84)
>  at
>
org.eclipse.ui.internal.presentations.PresentablePart.firePropertyChange(Pre
> sentablePart.java:90)
>  at
>
org.eclipse.ui.internal.presentations.PresentablePart$1.propertyChanged(Pres
> entablePart.java:62)
>  at
>
org.eclipse.ui.internal.WorkbenchPartReference.firePropertyChange(WorkbenchP
> artReference.java:342)
>  at
>
org.eclipse.ui.internal.WorkbenchPartReference.partPropertyChanged(Workbench
> PartReference.java:139)
>  at
>
org.eclipse.ui.internal.WorkbenchPartReference$1.propertyChanged(WorkbenchPa
> rtReference.java:63)
>  at org.eclipse.ui.part.WorkbenchPart$1.run(WorkbenchPart.java:129)
>  at
>
org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java
> :616)
>  at org.eclipse.core.runtime.Platform.run(Platform.java:747)
>  at
>
org.eclipse.ui.part.WorkbenchPart.firePropertyChange(WorkbenchPart.java:127)
>  at
>
org.eclipse.gef.ui.parts.GraphicalEditor.firePropertyChange(GraphicalEditor.
> java:145)
>  at
>
com.embarcadero.ui.infrastructure.gef.ui.parts.DiagramEditor.setDirty(Diagra
> mEditor.java:580)
>  at
>
com.embarcadero.ui.infrastructure.gef.ui.parts.DiagramEditor.commandStackCha
> nged(DiagramEditor.java:562)
>  at
>
org.eclipse.gef.commands.CommandStack.notifyListeners(CommandStack.java:186)
>  at org.eclipse.gef.commands.CommandStack.execute(CommandStack.java:89)
>  at
>
com.embarcadero.infrastructure.core.undoredo.ETCommandManager$ETCommandStack
> .superExecute(ETCommandManager.java:57)
>  at
>
com.embarcadero.infrastructure.core.undoredo.ETCommandManager.execute(ETComm
> andManager.java:92)
>  at
>
com.embarcadero.infrastructure.core.utils.XMLManip.setAttributeValue(XMLMani
> p.java:359)
>  at
>
com.embarcadero.infrastructure.core.metamodel.core.foundation.VersionableEle
> ment.setXMIID(VersionableElement.java:298)
>  at
>
com.embarcadero.infrastructure.core.metamodel.core.foundation.VersionableEle
> ment.buildNodePresence(VersionableElement.java:1114)
>  at
>
com.embarcadero.infrastructure.core.metamodel.core.constructs.Class.establis
> hNodePresence(Class.java:99)
>  at
>
com.embarcadero.infrastructure.core.metamodel.core.foundation.VersionableEle
> ment.prepareNode(VersionableElement.java:87)
>  at
>
com.embarcadero.infrastructure.core.metamodel.core.foundation.CreationFactor
> y.prepareNewElement(CreationFactory.java:144)
>  at
>
com.embarcadero.infrastructure.core.metamodel.core.foundation.CreationFactor
> y.retrieveMetaType(CreationFactory.java:108)
>  at
>
com.embarcadero.infrastructure.core.metamodel.core.foundation.FactoryRetriev
> er.createType(FactoryRetriever.java:109)
>  at
>
com.embarcadero.ui.infrastructure.wizard.NewElementWizard.doFinish(NewElemen
> tWizard.java:122)
>  at
>
com.embarcadero.ui.infrastructure.wizard.NewElementWizard$1.run(NewElementWi
> zard.java:81)
>  at
>
org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext
> .java:105)
> 92824 [ModalContext] ERROR
>
com.embarcadero.infrastructure.core.metamodel.core.foundation.VersionableEle
> ment  - java.lang.NullPointerException
>
>