Package com.bc.ceres.swing.debug
Class EventDispatchThreadHangMonitor
- java.lang.Object
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- java.awt.EventQueue
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- com.bc.ceres.swing.debug.EventDispatchThreadHangMonitor
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public final class EventDispatchThreadHangMonitor extends EventQueue
Monitors the AWT event dispatch thread for events that take longer than a certain time to be dispatched.The principle is to record the time at which we start processing an event, and have another thread check frequently to see if we're still processing. If the other thread notices that we've been processing a single event for too long, it prints a stack trace showing what the event dispatch thread is doing, and continues to time it until it finally finishes.
This is useful in determining what code is causing your Java application's GUI to be unresponsive.
The original blog can be found here
Automatically detecting AWT event dispatch thread hangs
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description protected void
dispatchEvent(AWTEvent event)
Overrides EventQueue.dispatchEvent to call our pre and post hooks either side of the system's event dispatch code.static void
initMonitoring()
Sets up hang detection for the event dispatch thread.static void
main(String[] args)
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Methods inherited from class java.awt.EventQueue
createSecondaryLoop, getCurrentEvent, getMostRecentEventTime, getNextEvent, invokeAndWait, invokeLater, isDispatchThread, peekEvent, peekEvent, pop, postEvent, push
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Method Detail
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initMonitoring
public static void initMonitoring()
Sets up hang detection for the event dispatch thread.
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dispatchEvent
protected void dispatchEvent(AWTEvent event)
Overrides EventQueue.dispatchEvent to call our pre and post hooks either side of the system's event dispatch code.- Overrides:
dispatchEvent
in classEventQueue
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main
public static void main(String[] args)
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