Examples of BackgroundObserver

org.apache.jackrabbit.oak.spi.commit.BackgroundObserver
An observer that uses a change queue and a background thread to forward content changes to another observer. The mechanism is designed so that the {@link #contentChanged(NodeState,CommitInfo)} method will never block,regardless of the behavior of the other observer. If that observer blocks or is too slow to consume all content changes, causing the change queue to fill up, any further update will automatically be merged into just one external content change, causing potential loss of local commit information. To help prevent such cases, any sequential external content changes that the background observer thread has yet to process are automatically merged to just one change.

Examples of org.apache.jackrabbit.oak.spi.commit.BackgroundObserver


        final Dictionary<String, Object> props = new Hashtable<String, Object>();
        props.put(Constants.SERVICE_VENDOR, "The Apache Software Foundation");
        props.put(Constants.SERVICE_DESCRIPTION, "Apache Sling JCR Observation Listener for Oak");


        final Observer observer = new BackgroundObserver(this, executor);
        serviceRegistration = bundleContext.registerService(Observer.class.getName(), observer, props);
    }

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Examples of org.apache.jackrabbit.oak.spi.commit.BackgroundObserver

    public Object addingService(ServiceReference reference) {
        Object service = bundleContext.getService(reference);


        if (service instanceof Observer) {
            Closer subscription = Closer.create();
            BackgroundObserver observer = subscription.register(
                    new BackgroundObserver((Observer) service, executor));
            subscription.register(
                    observable.addObserver(observer));
            subscriptions.put(reference, subscription);
            return service;
        } else {

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Examples of org.apache.jackrabbit.oak.spi.commit.BackgroundObserver

     */
    public synchronized void start(Whiteboard whiteboard) {
        checkState(registration == null, "Change processor started already");
        final WhiteboardExecutor executor = new WhiteboardExecutor();
        executor.start(whiteboard);
        final BackgroundObserver observer = createObserver(executor);
        registration = new CompositeRegistration(
            registerObserver(whiteboard, observer),
            registerMBean(whiteboard, EventListenerMBean.class,
                    tracker.getListenerMBean(), "EventListener", tracker.toString()),
            new Registration() {
                @Override
                public void unregister() {
                    observer.close();
                }
            },
            new Registration() {
                @Override
                public void unregister() {

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Examples of org.apache.jackrabbit.oak.spi.commit.BackgroundObserver

                }
        });
    }


    private BackgroundObserver createObserver(final WhiteboardExecutor executor) {
        return new BackgroundObserver(this, executor, queueLength) {
            private volatile long delay;
            private volatile boolean blocking;


            @Override
            protected void added(int queueSize) {

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Examples of org.apache.jackrabbit.oak.spi.commit.BackgroundObserver

     */
    public synchronized void start(Whiteboard whiteboard) {
        checkState(registration == null, "Change processor started already");
        final WhiteboardExecutor executor = new WhiteboardExecutor();
        executor.start(whiteboard);
        final BackgroundObserver observer = createObserver(executor);
        registration = new CompositeRegistration(
            registerObserver(whiteboard, observer),
            registerMBean(whiteboard, EventListenerMBean.class,
                    tracker.getListenerMBean(), "EventListener", tracker.toString()),
            new Registration() {
                @Override
                public void unregister() {
                    observer.close();
                }
            },
            new Registration() {
                @Override
                public void unregister() {

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Examples of org.apache.jackrabbit.oak.spi.commit.BackgroundObserver

                }
        });
    }


    private BackgroundObserver createObserver(final WhiteboardExecutor executor) {
        return new BackgroundObserver(this, executor, queueLength) {
            private volatile long delay;
            private volatile boolean blocking;


            @Override
            protected void added(int queueSize) {

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Examples of org.apache.jackrabbit.oak.spi.commit.BackgroundObserver

     */
    public synchronized void start(Whiteboard whiteboard) {
        checkState(registration == null, "Change processor started already");
        final WhiteboardExecutor executor = new WhiteboardExecutor();
        executor.start(whiteboard);
        final BackgroundObserver observer = createObserver(executor);
        registration = new CompositeRegistration(
            registerObserver(whiteboard, observer),
            registerMBean(whiteboard, EventListenerMBean.class,
                    tracker.getListenerMBean(), "EventListener", tracker.toString()),
            new Registration() {
                @Override
                public void unregister() {
                    observer.close();
                }
            },
            new Registration() {
                @Override
                public void unregister() {

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Examples of org.apache.jackrabbit.oak.spi.commit.BackgroundObserver

                }
        });
    }


    private BackgroundObserver createObserver(final WhiteboardExecutor executor) {
        return new BackgroundObserver(this, executor, queueLength) {
            private volatile long delay;
            private volatile boolean blocking;


            @Override
            protected void added(int queueSize) {

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Examples of org.apache.jackrabbit.oak.spi.commit.BackgroundObserver

     */
    public synchronized void start(Whiteboard whiteboard) {
        checkState(registration == null, "Change processor started already");
        final WhiteboardExecutor executor = new WhiteboardExecutor();
        executor.start(whiteboard);
        final BackgroundObserver observer = createObserver(executor);
        registration = new CompositeRegistration(
            registerObserver(whiteboard, observer),
            registerMBean(whiteboard, EventListenerMBean.class,
                    tracker.getListenerMBean(), "EventListener", tracker.toString()),
            new Registration() {
                @Override
                public void unregister() {
                    observer.close();
                }
            },
            new Registration() {
                @Override
                public void unregister() {

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Examples of org.apache.jackrabbit.oak.spi.commit.BackgroundObserver

                }
        });
    }


    private BackgroundObserver createObserver(final WhiteboardExecutor executor) {
        return new BackgroundObserver(this, executor, queueLength) {
            private volatile boolean warnWhenFull = true;


            @Override
            protected void added(int queueSize) {
                maxQueueLength.recordValue(queueSize);

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