Examples with TopologyEvent org.apache.sling.discovery.TopologyEvent used on opensource projects

Example 6 with TopologyEvent

use of org.apache.sling.discovery.TopologyEvent in project sling by apache.

the class TestSlowViewStateManager method testClusterSyncService_withConcurrency.

//TODO test takes env 10sec
@Category(Slow.class)
@Test
public void testClusterSyncService_withConcurrency() throws Exception {
    final org.apache.log4j.Logger commonsLogger = LogManager.getRootLogger().getLogger("org.apache.sling.discovery.commons.providers");
    final org.apache.log4j.Level logLevel = commonsLogger.getLevel();
    // change here to DEBUG in case of issues with this test
    commonsLogger.setLevel(Level.INFO);
    final Semaphore serviceSemaphore = new Semaphore(0);
    final Semaphore testSemaphore = new Semaphore(0);
    final ReentrantLock lock = new ReentrantLock();
    final ClusterSyncServiceWithSemaphore cs = new ClusterSyncServiceWithSemaphore(lock, serviceSemaphore);
    mgr = new ViewStateManagerImpl(lock, cs);
    final DummyListener listener = new DummyListener();
    mgr.bind(listener);
    TestHelper.assertNoEvents(listener);
    mgr.handleActivated();
    TestHelper.assertNoEvents(listener);
    final String slingId1 = UUID.randomUUID().toString();
    final String slingId2 = UUID.randomUUID().toString();
    final String slingId3 = UUID.randomUUID().toString();
    final String clusterId = UUID.randomUUID().toString();
    final DefaultClusterView cluster = new DefaultClusterView(clusterId);
    final DummyTopologyView view1 = new DummyTopologyView().addInstance(slingId1, cluster, true, true).addInstance(slingId2, cluster, false, false).addInstance(slingId3, cluster, false, false);
    final DummyTopologyView view2 = DummyTopologyView.clone(view1).removeInstance(slingId2);
    final DummyTopologyView view3 = DummyTopologyView.clone(view1).removeInstance(slingId2).removeInstance(slingId3);
    async(new Runnable() {

        public void run() {
            mgr.handleNewView(view1);
        }
    });
    Thread.sleep(1000);
    TestHelper.assertNoEvents(listener);
    assertEquals("should have one thread now waiting", 1, serviceSemaphore.getQueueLength());
    // release the first one only
    serviceSemaphore.release(1);
    Thread.sleep(1000);
    assertEvents(listener, EventHelper.newInitEvent(view1));
    mgr.handleChanging();
    assertEquals(0, mgr.waitForAsyncEvents(500));
    assertEvents(listener, EventHelper.newChangingEvent(view1));
    async(new Runnable() {

        public void run() {
            mgr.handleNewView(view2);
        }
    });
    logger.debug("run: waiting 1sec");
    Thread.sleep(1000);
    logger.debug("run: asserting no events");
    TestHelper.assertNoEvents(listener);
    assertEquals("should have one thread now waiting", 1, serviceSemaphore.getQueueLength());
    assertFalse("should not be locked", lock.isLocked());
    logger.debug("run: issuing a second event");
    // before releasing, issue another event, lets do a combination of changing/changed
    async(new Runnable() {

        public void run() {
            logger.debug("run2: calling handleChanging...");
            mgr.handleChanging();
            try {
                logger.debug("run2: done with handleChanging, acquiring testSemaphore...");
                testSemaphore.acquire();
                logger.debug("run2: calling handleNewView...");
                mgr.handleNewView(view3);
                logger.debug("run2: done with handleNewView...");
            } catch (InterruptedException e) {
                // fail
                logger.error("interrupted: " + e, e);
            }
        }
    });
    logger.debug("run: waiting 1sec");
    Thread.sleep(1000);
    int remainingAsyncEvents = mgr.waitForAsyncEvents(2000);
    logger.info("run: result of waitForAsyncEvent is: " + remainingAsyncEvents);
    assertEquals("should have one thread now waiting", 1, serviceSemaphore.getQueueLength());
    assertEquals("should be acquiring (by thread2)", 1, testSemaphore.getQueueLength());
    // releasing the testSemaphore
    testSemaphore.release();
    logger.debug("run: waiting 1sec");
    Thread.sleep(1000);
    assertEquals("should have two async events now in the queue or being sent", 2, mgr.waitForAsyncEvents(500));
    assertEquals("but should only have 1 thread actually sitting on the semaphore waiting", 1, serviceSemaphore.getQueueLength());
    logger.debug("run: releasing consistencyService");
    // release the first one only
    serviceSemaphore.release(1);
    logger.debug("run: waiting 1sec");
    Thread.sleep(1000);
    assertFalse("should not be locked", lock.isLocked());
    // this should not have triggered any event 
    TestHelper.assertNoEvents(listener);
    // then release the 2nd one
    serviceSemaphore.release(1);
    logger.debug("run: waiting 1sec");
    Thread.sleep(1000);
    logger.debug("run: asserting 1 event");
    final TopologyEvent changedEvent = EventHelper.newChangedEvent(view1, view3);
    assertEvents(listener, changedEvent);
    // back to default
    commonsLogger.setLevel(Level.INFO);
}

Example 7 with TopologyEvent

use of org.apache.sling.discovery.TopologyEvent in project sling by apache.

the class TestHelper method assertEvents.

public static void assertEvents(ViewStateManagerImpl mgr, DummyListener listener, TopologyEvent... events) {
    waitForAsyncEvents(mgr);
    assertEquals(events.length, listener.countEvents());
    for (int i = 0; i < events.length; i++) {
        TopologyEvent e = events[i];
        assertEquals(e.getType(), listener.getEvents().get(i).getType());
        switch(e.getType()) {
            case TOPOLOGY_INIT:
                {
                    assertNull(listener.getEvents().get(i).getOldView());
                    assertEquals(e.getNewView(), listener.getEvents().get(i).getNewView());
                    break;
                }
            case TOPOLOGY_CHANGING:
                {
                    assertEquals(e.getOldView(), listener.getEvents().get(i).getOldView());
                    assertNull(listener.getEvents().get(i).getNewView());
                    break;
                }
            case PROPERTIES_CHANGED:
            case TOPOLOGY_CHANGED:
                {
                    assertEquals(e.getOldView(), listener.getEvents().get(i).getOldView());
                    assertEquals(e.getNewView(), listener.getEvents().get(i).getNewView());
                    break;
                }
            default:
                {
                    fail("no other type supported yet");
                }
        }
    }
    listener.clearEvents();
}

Example 8 with TopologyEvent

use of org.apache.sling.discovery.TopologyEvent in project sling by apache.

the class TestViewStateManager method testPropertiesChanged.

@Test
public void testPropertiesChanged() throws Exception {
    final DummyListener listener = new DummyListener();
    mgr.handleActivated();
    mgr.bind(listener);
    mgr.handleChanging();
    DummyTopologyView oldView = new DummyTopologyView().addInstance();
    DefaultInstanceDescription localInstance = (DefaultInstanceDescription) oldView.getLocalInstance();
    localInstance.setProperty("foo", "bar1");
    mgr.handleNewView(oldView);
    TopologyEvent initEvent = EventHelper.newInitEvent(oldView.clone());
    assertEvents(listener, initEvent);
    DummyTopologyView newView = oldView.clone();
    oldView.setNotCurrent();
    localInstance = (DefaultInstanceDescription) newView.getLocalInstance();
    localInstance.setProperty("foo", "bar2");
    mgr.handleNewView(newView);
    Thread.sleep(2000);
    TopologyEvent propertiesChangedEvent = EventHelper.newPropertiesChangedEvent(oldView.clone(), newView.clone());
    assertEvents(listener, propertiesChangedEvent);
}

Example 9 with TopologyEvent

use of org.apache.sling.discovery.TopologyEvent in project sling by apache.

the class NoClusterDiscoveryService method bindTopologyEventListener.

@SuppressWarnings("unused")
private void bindTopologyEventListener(final TopologyEventListener listener) {
    logger.debug("Binding TopologyEventListener {}", listener);
    boolean inform = true;
    synchronized (lock) {
        final List<TopologyEventListener> currentList = new ArrayList<TopologyEventListener>(Arrays.asList(listeners));
        currentList.add(listener);
        this.listeners = currentList.toArray(new TopologyEventListener[currentList.size()]);
        if (this.currentTopologyView != null) {
            listener.handleTopologyEvent(new TopologyEvent(Type.TOPOLOGY_INIT, null, this.currentTopologyView));
        }
    }
}

Example 10 with TopologyEvent

use of org.apache.sling.discovery.TopologyEvent in project sling by apache.

the class NoClusterDiscoveryService method createNewView.

private void createNewView(final Type eventType, boolean inform) {
    final TopologyEventListener[] registeredServices;
    final TopologyView newView;
    final TopologyView oldView;
    synchronized (lock) {
        // invalidate old view
        if (this.currentTopologyView != null) {
            this.currentTopologyView.invalidate();
            oldView = currentTopologyView;
        } else {
            oldView = null;
        }
        final InstanceDescription myInstanceDescription = new InstanceDescriptionImpl(this.settingsService.getSlingId(), this.cachedProperties);
        this.currentTopologyView = new TopologyViewImpl(myInstanceDescription);
        registeredServices = this.listeners;
        newView = this.currentTopologyView;
        if (inform) {
            for (final TopologyEventListener da : registeredServices) {
                da.handleTopologyEvent(new TopologyEvent(eventType, oldView, newView));
            }
        }
    }
}