Examples of java.util.Timer.purge()

java.util.Timer.purge()
Removes all cancelled tasks from this timer's task queue. Calling this method has no effect on the behavior of the timer, but eliminates the references to the cancelled tasks from the queue. If there are no external references to these tasks, they become eligible for garbage collection.
Most programs will have no need to call this method. It is designed for use by the rare application that cancels a large number of tasks. Calling this method trades time for space: the runtime of the method may be proportional to n + c log n, where n is the number of tasks in the queue and c is the number of cancelled tasks.
Note that it is permissible to call this method from within a a task scheduled on this timer. @return the number of tasks removed from the queue. @since 1.5

    Date timeToRun = new Date(System.currentTimeMillis() + when);
    final Timer timer = new Timer();
    timer.schedule(new TimerTask() {
      public void run() {
        timer.cancel();
        timer.purge();
        if (aSpringContainerIds == null) {
          isStopping = true;
          System.out.println(">>>> runTest: Stopping UIMA EE Engine");
          uimaEEEngine.stop();
          isStopping = false;

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        // remove references to timer tasks cancelled above to make them
        // eligible for garbage collection
        Timer t = getTimer(false);
        if (t != null) {
            t.purge();
            t.cancel();
        }
    }
    
    synchronized void shutdownReliableEndpoint(Endpoint e) {

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        // remove references to timer tasks cancelled above to make them
        // eligible for garbage collection
        Timer t = getTimer(false);
        if (t != null) {
            t.purge();
        }
        
        reliableEndpoints.remove(e);
    }

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        // remove references to timer tasks cancelled above to make them
        // eligible for garbage collection
        Timer t = getTimer(false);
        if (t != null) {
            t.purge();
            t.cancel();
        }


        // unregistring of this managed bean from the server is done by the bus itself
    }

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        // remove references to timer tasks cancelled above to make them
        // eligible for garbage collection
        Timer t = getTimer(false);
        if (t != null) {
            t.purge();
        }
        
        for (ProtocolVariation protocol : ProtocolVariation.values()) {
            endpointMaps.get(protocol).remove(e);
        }

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        // remove references to timer tasks cancelled above to make them
        // eligible for garbage collection
        Timer t = getTimer(false);
        if (t != null) {
            t.purge();
            t.cancel();
        }
    }
    
    synchronized void shutdownReliableEndpoint(Endpoint e) {

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        // remove references to timer tasks cancelled above to make them
        // eligible for garbage collection
        Timer t = getTimer(false);
        if (t != null) {
            t.purge();
        }
        
        reliableEndpoints.remove(e);
    }

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        // remove references to timer tasks cancelled above to make them
        // eligible for garbage collection
        Timer t = getTimer(false);
        if (t != null) {
            t.purge();
            t.cancel();
        }
    }
    
    synchronized void shutdownReliableEndpoint(Endpoint e) {

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        // remove references to timer tasks cancelled above to make them
        // eligible for garbage collection
        Timer t = getTimer(false);
        if (t != null) {
            t.purge();
        }
        
        reliableEndpoints.remove(e);
    }

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        // remove references to timer tasks cancelled above to make them
        // eligible for garbage collection
        Timer t = getTimer(false);
        if (t != null) {
            t.purge();
            t.cancel();
        }


        // unregistring of this managed bean from the server is done by the bus itself
    }

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