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

Example 6 with TopologyEventListener

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

the class NoClusterDiscoveryServiceTest method testListenerAfter.

@Test
public void testListenerAfter() throws Exception {
    final DiscoveryService service = this.createService(true);
    final List<TopologyEvent> events = new ArrayList<TopologyEvent>();
    final TopologyEventListener listener = new TopologyEventListener() {

        @Override
        public void handleTopologyEvent(final TopologyEvent event) {
            events.add(event);
        }
    };
    invoke(service, "bindTopologyEventListener", new Class[] { TopologyEventListener.class }, new Object[] { listener });
    assertEquals(1, events.size());
    assertEquals(TopologyEvent.Type.TOPOLOGY_INIT, events.get(0).getType());
    assertNotNull(events.get(0).getNewView());
    assertNull(events.get(0).getOldView());
}

Example 7 with TopologyEventListener

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

the class ChaosTest method setupChaosThreads.

/**
     * Setup chaos thread(s)
     *
     * Chaos is right now created by sending topology changing/changed events randomly
     */
private void setupChaosThreads(final List<Thread> threads, final AtomicLong finishedThreads) {
    final List<TopologyView> views = new ArrayList<>();
    // register topology listener
    final ServiceRegistration<TopologyEventListener> reg = this.bc.registerService(TopologyEventListener.class, new TopologyEventListener() {

        @Override
        public void handleTopologyEvent(final TopologyEvent event) {
            if (event.getType() == Type.TOPOLOGY_INIT) {
                views.add(event.getNewView());
            }
        }
    }, null);
    while (views.isEmpty()) {
        this.sleep(10);
    }
    reg.unregister();
    final TopologyView view = views.get(0);
    try {
        final Collection<ServiceReference<TopologyEventListener>> refs = this.bc.getServiceReferences(TopologyEventListener.class, null);
        assertNotNull(refs);
        assertFalse(refs.isEmpty());
        TopologyEventListener found = null;
        for (final ServiceReference<TopologyEventListener> ref : refs) {
            final TopologyEventListener listener = this.bc.getService(ref);
            if (listener != null && listener.getClass().getName().equals("org.apache.sling.event.impl.jobs.config.TopologyHandler")) {
                found = listener;
                break;
            }
            bc.ungetService(ref);
        }
        assertNotNull(found);
        final TopologyEventListener tel = found;
        threads.add(new Thread() {

            private final Random random = new Random();

            @Override
            public void run() {
                final long startTime = System.currentTimeMillis();
                // this thread runs 30 seconds longer than the job creation thread
                final long endTime = startTime + (DURATION + 30) * 1000;
                while (System.currentTimeMillis() < endTime) {
                    final int sleepTime = random.nextInt(25) + 15;
                    try {
                        Thread.sleep(sleepTime * 1000);
                    } catch (final InterruptedException ie) {
                        Thread.currentThread().interrupt();
                    }
                    tel.handleTopologyEvent(new TopologyEvent(Type.TOPOLOGY_CHANGING, view, null));
                    final int changingTime = random.nextInt(20) + 3;
                    try {
                        Thread.sleep(changingTime * 1000);
                    } catch (final InterruptedException ie) {
                        Thread.currentThread().interrupt();
                    }
                    tel.handleTopologyEvent(new TopologyEvent(Type.TOPOLOGY_CHANGED, view, view));
                }
                tel.getClass().getName();
                finishedThreads.incrementAndGet();
            }
        });
    } catch (InvalidSyntaxException e) {
        e.printStackTrace();
    }
}

Example 8 with TopologyEventListener

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

the class OakDiscoveryService method activate.

/**
     * Activate this service
     */
@Activate
protected void activate(final BundleContext bundleContext) {
    logger.debug("OakDiscoveryService activating...");
    if (settingsService == null) {
        throw new IllegalStateException("settingsService not found");
    }
    if (oakViewChecker == null) {
        throw new IllegalStateException("heartbeatHandler not found");
    }
    slingId = settingsService.getSlingId();
    ClusterSyncService consistencyService;
    if (config.getSyncTokenEnabled()) {
        //TODO: ConsistencyHistory is implemented a little bit hacky ..
        ClusterSyncHistory consistencyHistory = new ClusterSyncHistory();
        oakBacklogClusterSyncService.setConsistencyHistory(consistencyHistory);
        syncTokenService.setConsistencyHistory(consistencyHistory);
        consistencyService = new ClusterSyncServiceChain(oakBacklogClusterSyncService, syncTokenService);
    } else {
        consistencyService = oakBacklogClusterSyncService;
    }
    viewStateManager = ViewStateManagerFactory.newViewStateManager(viewStateManagerLock, consistencyService);
    if (config.getMinEventDelay() > 0) {
        viewStateManager.installMinEventDelayHandler(this, scheduler, config.getMinEventDelay());
    }
    final String isolatedClusterId = UUID.randomUUID().toString();
    {
        // create a pre-voting/isolated topologyView which would be used
        // until the first voting has finished.
        // this way for the single-instance case the clusterId can
        // remain the same between a getTopology() that is invoked before
        // the first TOPOLOGY_INIT and afterwards
        DefaultClusterView isolatedCluster = new DefaultClusterView(isolatedClusterId);
        Map<String, String> emptyProperties = new HashMap<String, String>();
        DefaultInstanceDescription isolatedInstance = new DefaultInstanceDescription(isolatedCluster, true, true, slingId, emptyProperties);
        Collection<InstanceDescription> col = new ArrayList<InstanceDescription>();
        col.add(isolatedInstance);
        final DefaultTopologyView topology = new DefaultTopologyView();
        topology.addInstances(col);
        topology.setNotCurrent();
        setOldView(topology);
    }
    setOldView((DefaultTopologyView) getTopology());
    getOldView().setNotCurrent();
    // make sure the first heartbeat is issued as soon as possible - which
    // is right after this service starts. since the two (discoveryservice
    // and heartbeatHandler need to know each other, the discoveryservice
    // is passed on to the heartbeatHandler in this initialize call).
    oakViewChecker.initialize(this);
    viewStateManagerLock.lock();
    try {
        viewStateManager.handleActivated();
        doUpdateProperties();
        DefaultTopologyView newView = (DefaultTopologyView) getTopology();
        if (newView.isCurrent()) {
            viewStateManager.handleNewView(newView);
        } else {
            // SLING-3750: just issue a log.info about the delaying
            logger.info("activate: this instance is in isolated mode and must yet finish voting before it can send out TOPOLOGY_INIT.");
        }
        activated = true;
        setOldView(newView);
        // bind them to the viewstatemanager too
        for (TopologyEventListener listener : pendingListeners) {
            viewStateManager.bind(listener);
        }
        pendingListeners.clear();
        viewStateManager.bind(changePropagationListener);
    } finally {
        if (viewStateManagerLock != null) {
            viewStateManagerLock.unlock();
        }
    }
    URL[] topologyConnectorURLs = config.getTopologyConnectorURLs();
    if (topologyConnectorURLs != null) {
        for (int i = 0; i < topologyConnectorURLs.length; i++) {
            final URL aURL = topologyConnectorURLs[i];
            if (aURL != null) {
                try {
                    logger.info("activate: registering outgoing topology connector to " + aURL);
                    connectorRegistry.registerOutgoingConnector(clusterViewService, aURL);
                } catch (final Exception e) {
                    logger.info("activate: could not register url: " + aURL + " due to: " + e, e);
                }
            }
        }
    }
    logger.debug("OakDiscoveryService activated.");
}

Example 9 with TopologyEventListener

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

the class NoClusterDiscoveryServiceTest method testListenerBefore.

@Test
public void testListenerBefore() throws Exception {
    final DiscoveryService service = this.createService(false);
    final List<TopologyEvent> events = new ArrayList<TopologyEvent>();
    final TopologyEventListener listener = new TopologyEventListener() {

        @Override
        public void handleTopologyEvent(final TopologyEvent event) {
            events.add(event);
        }
    };
    invoke(service, "bindTopologyEventListener", new Class[] { TopologyEventListener.class }, new Object[] { listener });
    assertEquals(0, events.size());
    invoke(service, "activate");
    assertEquals(1, events.size());
    assertEquals(TopologyEvent.Type.TOPOLOGY_INIT, events.get(0).getType());
    assertNotNull(events.get(0).getNewView());
    assertNull(events.get(0).getOldView());
}

Example 10 with TopologyEventListener

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

the class NoClusterDiscoveryServiceTest method testPropertyChanges.

@Test
public void testPropertyChanges() throws Exception {
    final DiscoveryService service = this.createService(true);
    final List<TopologyEvent> events = new ArrayList<TopologyEvent>();
    final TopologyEventListener listener = new TopologyEventListener() {

        @Override
        public void handleTopologyEvent(final TopologyEvent event) {
            events.add(event);
        }
    };
    invoke(service, "bindTopologyEventListener", new Class[] { TopologyEventListener.class }, new Object[] { listener });
    events.clear();
    final PropertyProvider provider = new PropertyProvider() {

        @Override
        public String getProperty(final String name) {
            if ("a".equals(name)) {
                return "1";
            }
            if ("b".equals(name)) {
                return "2";
            }
            if ("c".equals(name)) {
                return "3";
            }
            return null;
        }
    };
    final Map<String, Object> properties = new HashMap<String, Object>();
    properties.put(PropertyProvider.PROPERTY_PROPERTIES, new String[] { "a", "b", "c" });
    properties.put(Constants.SERVICE_ID, 1L);
    invoke(service, "bindPropertyProvider", new Class[] { PropertyProvider.class, Map.class }, new Object[] { provider, properties });
    assertEquals(1, events.size());
    assertEquals(TopologyEvent.Type.PROPERTIES_CHANGED, events.get(0).getType());
    assertNotNull(events.get(0).getNewView());
    assertTrue(events.get(0).getNewView().isCurrent());
    assertNotNull(events.get(0).getOldView());
    assertFalse(events.get(0).getOldView().isCurrent());
    // test properties
    assertEquals("1", events.get(0).getNewView().getLocalInstance().getProperty("a"));
    assertEquals("2", events.get(0).getNewView().getLocalInstance().getProperty("b"));
    assertEquals("3", events.get(0).getNewView().getLocalInstance().getProperty("c"));
    assertNull(events.get(0).getOldView().getLocalInstance().getProperty("a"));
    assertNull(events.get(0).getOldView().getLocalInstance().getProperty("b"));
    assertNull(events.get(0).getOldView().getLocalInstance().getProperty("c"));
    events.clear();
    invoke(service, "unbindPropertyProvider", new Class[] { PropertyProvider.class, Map.class }, new Object[] { provider, properties });
    assertEquals(1, events.size());
    assertEquals(TopologyEvent.Type.PROPERTIES_CHANGED, events.get(0).getType());
    assertNotNull(events.get(0).getNewView());
    assertTrue(events.get(0).getNewView().isCurrent());
    assertNotNull(events.get(0).getOldView());
    assertFalse(events.get(0).getOldView().isCurrent());
    assertEquals("1", events.get(0).getOldView().getLocalInstance().getProperty("a"));
    assertEquals("2", events.get(0).getOldView().getLocalInstance().getProperty("b"));
    assertEquals("3", events.get(0).getOldView().getLocalInstance().getProperty("c"));
    assertNull(events.get(0).getNewView().getLocalInstance().getProperty("a"));
    assertNull(events.get(0).getNewView().getLocalInstance().getProperty("b"));
    assertNull(events.get(0).getNewView().getLocalInstance().getProperty("c"));
}