[PIVOT-780] Can't use BXMLSerializer from non-AWT threads makes background resource loading impossible

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.1
• Fix Version/s: 2.0.1
• Component/s: core-beans, wtk
• Labels: background initialization thread
• Assignee: Noel Grandin
• Reporter: Piotr Kolaczkowski
• Created: 30/Jul/11 11:40
• Updated: 08/Aug/11 08:18
• Resolved: 08/Aug/11 08:18

Description

Calling bxmlSerializer.readObject from a non-AWT thread causes the following exception:

An error occurred at line number 5 in file /C:/Users/Piotr/Projekty/viungo/viungo-editor/target/scala_2.9.0/classes/com/viungo/editor/CircuitEditor.bxml:
org.apache.pivot.serialization.SerializationException: java.lang.IllegalStateException: this method can only be called from the AWT event dispatch thread
at org.apache.pivot.beans.BXMLSerializer.processStartElement(BXMLSerializer.java:769)
at org.apache.pivot.beans.BXMLSerializer.readObject(BXMLSerializer.java:441)
at org.apache.pivot.beans.BXMLSerializer.readObject(BXMLSerializer.java:624)
at org.apache.pivot.beans.BXMLSerializer.readObject(BXMLSerializer.java:579)
at org.apache.pivot.beans.BXMLSerializer.readObject(BXMLSerializer.java:540)
at com.viungo.editor.CircuitEditor$$anon$1.execute(CircuitEditor.scala:21)
at com.viungo.editor.CircuitEditor$$anon$1.execute(CircuitEditor.scala:18)
at org.apache.pivot.util.concurrent.Task$ExecuteCallback.run(Task.java:42)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.IllegalStateException: this method can only be called from the AWT event dispatch thread
at org.apache.pivot.wtk.Container$1.run(Container.java:864)
at org.apache.pivot.wtk.Container.assertEventDispatchThread(Container.java:871)
at org.apache.pivot.wtk.WTKListenerList.add(WTKListenerList.java:36)
at org.apache.pivot.wtk.skin.ComponentSkin.install(ComponentSkin.java:96)
at org.apache.pivot.wtk.skin.ContainerSkin.install(ContainerSkin.java:129)
at org.apache.pivot.wtk.skin.WindowSkin.install(WindowSkin.java:66)
at org.apache.pivot.wtk.Component.setSkin(Component.java:749)
at org.apache.pivot.wtk.Component.installSkin(Component.java:812)
at org.apache.pivot.wtk.Window.<init>(Window.java:453)
at org.apache.pivot.wtk.Window.<init>(Window.java:448)
at com.viungo.editor.EditorWindow.<init>(EditorWindow.scala:20)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at java.lang.Class.newInstance0(Class.java:355)
at java.lang.Class.newInstance(Class.java:308)
at org.apache.pivot.beans.BXMLSerializer.newTypedObject(BXMLSerializer.java:1556)
at org.apache.pivot.beans.BXMLSerializer.processStartElement(BXMLSerializer.java:767)
... 11 more

Loading objects in background is very important, so that the user can see e.g. a progress indicator while the rest of the UI is deserialized.
Doing this in AWT thread, blocks what is currently displayed.

Issue Links

• is related to: PIVOT-740 Add sanity checks to prevent updates to WTK state from happening except from the event dispatch thread
• is related to: PIVOT-747 pivot & blocking edt