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

Example 11 with TopologyView

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

the class HeartbeatTest method doTestSlowAndFastMachine.

public void doTestSlowAndFastMachine(boolean withFailingScheduler) throws Throwable {
    logger.info("doTestSlowAndFastMachine: creating slowMachine... (w/o heartbeat runner)");
    FullJR2VirtualInstanceBuilder slowBuilder = newBuilder();
    slowBuilder.setDebugName("slow").newRepository("/var/discovery/impl/", true).setConnectorPingTimeout(5).setConnectorPingInterval(999).setMinEventDelay(0).withFailingScheduler(withFailingScheduler);
    FullJR2VirtualInstance slowMachine = slowBuilder.fullBuild();
    instances.add(slowMachine);
    SimpleTopologyEventListener slowListener = new SimpleTopologyEventListener("slow");
    slowMachine.bindTopologyEventListener(slowListener);
    logger.info("doTestSlowAndFastMachine: creating fastMachine... (w/o heartbeat runner)");
    FullJR2VirtualInstanceBuilder fastBuilder = newBuilder();
    fastBuilder.setDebugName("fast").useRepositoryOf(slowMachine).setConnectorPingTimeout(5).setConnectorPingInterval(999).setMinEventDelay(0).withFailingScheduler(withFailingScheduler);
    FullJR2VirtualInstance fastMachine = fastBuilder.fullBuild();
    instances.add(fastMachine);
    SimpleTopologyEventListener fastListener = new SimpleTopologyEventListener("fast");
    fastMachine.bindTopologyEventListener(fastListener);
    HeartbeatHandler hhSlow = slowMachine.getHeartbeatHandler();
    HeartbeatHandler hhFast = fastMachine.getHeartbeatHandler();
    Thread.sleep(1000);
    logger.info("doTestSlowAndFastMachine: no event should have been triggered yet");
    assertFalse(fastMachine.getDiscoveryService().getTopology().isCurrent());
    assertFalse(slowMachine.getDiscoveryService().getTopology().isCurrent());
    assertNull(fastListener.getLastEvent());
    assertNull(slowListener.getLastEvent());
    // make few rounds of heartbeats so that the two instances see each other
    logger.info("doTestSlowAndFastMachine: send a couple of heartbeats to connect the two..");
    for (int i = 0; i < 5; i++) {
        synchronized (lock(hhSlow)) {
            hhSlow.issueHeartbeat();
            hhSlow.doCheckView();
        }
        synchronized (lock(hhFast)) {
            hhFast.issueHeartbeat();
            hhFast.doCheckView();
        }
        Thread.sleep(100);
    }
    logger.info("doTestSlowAndFastMachine: now the two instances should be connected.");
    slowMachine.dumpRepo();
    assertEquals(2, slowMachine.getDiscoveryService().getTopology().getInstances().size());
    assertEquals(2, fastMachine.getDiscoveryService().getTopology().getInstances().size());
    assertEquals(TopologyEvent.Type.TOPOLOGY_INIT, fastListener.getLastEvent().getType());
    assertEquals(1, fastListener.getEventCount());
    assertEquals(TopologyEvent.Type.TOPOLOGY_INIT, slowListener.getLastEvent().getType());
    assertEquals(1, slowListener.getEventCount());
    // now let the slow machine be slow while the fast one updates as expected
    logger.info("doTestSlowAndFastMachine: last heartbeat of slowMachine.");
    synchronized (lock(hhSlow)) {
        hhSlow.issueHeartbeat();
    }
    logger.info("doTestSlowAndFastMachine: while the fastMachine still sends heartbeats...");
    for (int i = 0; i < 6; i++) {
        Thread.sleep(1500);
        synchronized (lock(hhFast)) {
            hhFast.issueHeartbeat();
            hhFast.doCheckView();
        }
    }
    logger.info("doTestSlowAndFastMachine: now the fastMachine should have decoupled the slow one");
    fastMachine.dumpRepo();
    // one more for the start of the vote
    hhFast.doCheckView();
    fastMachine.dumpRepo();
    // and one for the promotion
    hhFast.doCheckView();
    // after 9 sec hhSlow's heartbeat will have timed out, so hhFast will not see hhSlow anymore
    fastMachine.dumpRepo();
    assertEquals(TopologyEvent.Type.TOPOLOGY_CHANGED, fastListener.getLastEvent().getType());
    assertEquals(3, fastListener.getEventCount());
    assertEquals(1, fastMachine.getDiscoveryService().getTopology().getInstances().size());
    TopologyView topo = slowMachine.getDiscoveryService().getTopology();
    assertFalse(topo.isCurrent());
    // after those 6 sec, hhSlow does the check (6sec between heartbeat and check)
    logger.info("doTestSlowAndFastMachine: slowMachine is going to do a checkView next - and will detect being decoupled");
    hhSlow.doCheckView();
    slowMachine.dumpRepo();
    logger.info("doTestSlowAndFastMachine: slowMachine is going to also do a heartbeat next");
    synchronized (lock(hhSlow)) {
        hhSlow.issueHeartbeat();
    }
    assertEquals(TopologyEvent.Type.TOPOLOGY_CHANGED, fastListener.getLastEvent().getType());
    assertEquals(3, fastListener.getEventCount());
    assertEquals(TopologyEvent.Type.TOPOLOGY_CHANGING, slowListener.getLastEvent().getType());
    assertEquals(2, slowListener.getEventCount());
    Thread.sleep(8000);
    // even after 8 sec the slow lsitener did not send a TOPOLOGY_CHANGED yet
    logger.info("doTestSlowAndFastMachine: after another 8 sec of silence from slowMachine, it should still remain in CHANGING state");
    assertEquals(TopologyEvent.Type.TOPOLOGY_CHANGING, slowListener.getLastEvent().getType());
    assertFalse(slowMachine.getDiscoveryService().getTopology().isCurrent());
    assertEquals(2, slowListener.getEventCount());
    assertEquals(TopologyEvent.Type.TOPOLOGY_CHANGED, fastListener.getLastEvent().getType());
    assertEquals(1, fastMachine.getDiscoveryService().getTopology().getInstances().size());
    assertEquals(3, fastListener.getEventCount());
    // make few rounds of heartbeats so that the two instances see each other again
    logger.info("doTestSlowAndFastMachine: now let both fast and slow issue heartbeats...");
    for (int i = 0; i < 4; i++) {
        synchronized (lock(hhFast)) {
            hhFast.issueHeartbeat();
            hhFast.doCheckView();
        }
        synchronized (lock(hhSlow)) {
            hhSlow.issueHeartbeat();
            hhSlow.doCheckView();
        }
        Thread.sleep(1000);
    }
    logger.info("doTestSlowAndFastMachine: by now the two should have joined");
    // this should have put the two together again
    // even after 8 sec the slow lsitener did not send a TOPOLOGY_CHANGED yet
    assertEquals(TopologyEvent.Type.TOPOLOGY_CHANGED, fastListener.getLastEvent().getType());
    assertTrue(fastMachine.getDiscoveryService().getTopology().isCurrent());
    assertEquals(2, fastMachine.getDiscoveryService().getTopology().getInstances().size());
    assertEquals(5, fastListener.getEventCount());
    assertEquals(TopologyEvent.Type.TOPOLOGY_CHANGED, slowListener.getLastEvent().getType());
    assertTrue(slowMachine.getDiscoveryService().getTopology().isCurrent());
    assertEquals(2, slowMachine.getDiscoveryService().getTopology().getInstances().size());
    assertEquals(3, slowListener.getEventCount());
}

Example 12 with TopologyView

use of org.apache.sling.discovery.TopologyView 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));
            }
        }
    }
}

Example 13 with TopologyView

use of org.apache.sling.discovery.TopologyView 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 14 with TopologyView

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

the class JobManagerConfigurationTest method createView.

private TopologyView createView() {
    final TopologyView view = Mockito.mock(TopologyView.class);
    Mockito.when(view.isCurrent()).thenReturn(true);
    final InstanceDescription local = Mockito.mock(InstanceDescription.class);
    Mockito.when(local.isLeader()).thenReturn(true);
    Mockito.when(local.isLocal()).thenReturn(true);
    Mockito.when(local.getSlingId()).thenReturn("id");
    Mockito.when(view.getLocalInstance()).thenReturn(local);
    final ClusterView localView = Mockito.mock(ClusterView.class);
    Mockito.when(localView.getId()).thenReturn("1");
    Mockito.when(localView.getInstances()).thenReturn(Collections.singletonList(local));
    Mockito.when(view.getClusterViews()).thenReturn(Collections.singleton(localView));
    Mockito.when(local.getClusterView()).thenReturn(localView);
    return view;
}

Example 15 with TopologyView

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

the class TopologyWebConsolePlugin method renderProperties.

/**
     * Render the properties page of a particular instance
     */
private void renderProperties(final PrintWriter pw, final String contextPath, final String nodeId) {
    if (logger.isDebugEnabled()) {
        logger.debug("renderProperties: nodeId=" + nodeId);
    }
    final TopologyView tv = this.currentView;
    @SuppressWarnings("unchecked") Set<InstanceDescription> instances = (tv == null ? (Set<InstanceDescription>) Collections.EMPTY_SET : tv.findInstances(new InstanceFilter() {

        @Override
        public boolean accept(InstanceDescription instance) {
            String slingId = instance.getSlingId();
            if (logger.isDebugEnabled()) {
                logger.debug("renderProperties/picks: slingId={}", slingId);
            }
            return (slingId.equals(nodeId));
        }
    }));
    if (instances != null && instances.size() == 1) {
        InstanceDescription instance = instances.iterator().next();
        pw.println("Properties of " + instance.getSlingId() + ":<br/>");
        pw.println("<table class=\"adapters nicetable ui-widget tablesorter\">");
        pw.println("<thead>");
        pw.println("<tr>");
        pw.println("<th class=\"header ui-widget-header\">Key</th>");
        pw.println("<th class=\"header ui-widget-header\">Value</th>");
        pw.println("</tr>");
        pw.println("</thead>");
        pw.println("<tbody>");
        boolean odd = true;
        for (Iterator<Entry<String, String>> it = instance.getProperties().entrySet().iterator(); it.hasNext(); ) {
            Entry<String, String> entry = it.next();
            String oddEven = odd ? "odd" : "even";
            odd = !odd;
            pw.println("<tr class=\"" + oddEven + " ui-state-default\">");
            pw.println("<td>" + entry.getKey() + "</td>");
            pw.println("<td>" + entry.getValue() + "</td>");
            pw.println("</tr>");
        }
        pw.println("</tbody>");
        pw.println("</table>");
    }
}