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

Example 1 with TopologyView

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

the class LargeTopologyWithHubTest method testLargeTopologyWithHub.

@Test
@Retry(timeoutMsec = 30000, intervalMsec = 500)
public void testLargeTopologyWithHub() throws Exception {
    hub.dumpRepo();
    final TopologyView tv = hub.getDiscoveryService().getTopology();
    assertNotNull(tv);
    logger.info("testLargeTopologyWithHub: checking if all connectors are registered, TopologyView has {} Instances", tv.getInstances().size());
    TopologyHelper.assertTopologyConsistsOf(tv, slingIds.toArray(new String[slingIds.size()]));
    logger.info("testLargeTopologyWithHub: test passed");
}

Example 2 with TopologyView

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

the class AbstractClusterTest method assertTopology.

private void assertTopology(VirtualInstance instance, SimpleClusterView... assertedClusterViews) {
    final TopologyView topology = instance.getDiscoveryService().getTopology();
    logger.info("assertTopology: instance " + instance.slingId + " sees topology: " + topology + ", expected: " + assertedClusterViews);
    assertNotNull(topology);
    if (assertedClusterViews.length != topology.getClusterViews().size()) {
        dumpFailureDetails(topology, assertedClusterViews);
        fail("instance " + instance.slingId + " expected " + assertedClusterViews.length + ", got: " + topology.getClusterViews().size());
    }
    final Set<ClusterView> actualClusters = new HashSet<ClusterView>(topology.getClusterViews());
    for (int i = 0; i < assertedClusterViews.length; i++) {
        final SimpleClusterView assertedClusterView = assertedClusterViews[i];
        boolean foundMatch = false;
        for (Iterator<ClusterView> it = actualClusters.iterator(); it.hasNext(); ) {
            final ClusterView actualClusterView = it.next();
            if (matches(assertedClusterView, actualClusterView)) {
                it.remove();
                foundMatch = true;
                break;
            }
        }
        if (!foundMatch) {
            dumpFailureDetails(topology, assertedClusterViews);
            fail("instance " + instance.slingId + " could not find a match in the topology with instance=" + instance.slingId + " and clusterViews=" + assertedClusterViews.length);
        }
    }
    assertEquals("not all asserted clusterviews are in the actual view with instance=" + instance + " and clusterViews=" + assertedClusterViews, actualClusters.size(), 0);
}

Example 3 with TopologyView

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

the class AbstractClusterTest method testConnectorSwitching4139.

/*    ok, this test should do the following:
         * cluster A with instance 1 and instance 2
         * cluster B with instance 3 and instance 4
         * cluster C with instance 5

         * initially, instance3 is pinging instance1, and instance 5 is pinging instance1 as well (MAC hub)
          * that should result in instance3 and 5 to inherit the rest from instance1
         * then simulate load balancer switching from instance1 to instance2 - hence pings go to instance2
         *
         */
//TODO: this takes env 45sec
@Category(Slow.class)
@Test
public void testConnectorSwitching4139() throws Throwable {
    final int MIN_EVENT_DELAY = 1;
    // reset any setup that was done - we start with a different setup than the default one
    tearDown();
    final org.apache.log4j.Logger discoveryLogger = RootLogger.getLogger("org.apache.sling.discovery");
    logLevel = discoveryLogger.getLevel();
    discoveryLogger.setLevel(Level.DEBUG);
    instance1 = newBuilder().setDebugName("instance1").newRepository("/var/discovery/clusterA/", true).setConnectorPingTimeout(10).setConnectorPingInterval(999).setMinEventDelay(MIN_EVENT_DELAY).build();
    instance2 = newBuilder().setDebugName("instance2").useRepositoryOf(instance1).setConnectorPingTimeout(10).setConnectorPingInterval(999).setMinEventDelay(MIN_EVENT_DELAY).build();
    // now launch the remote instance
    instance3 = newBuilder().setDebugName("instance3").newRepository("/var/discovery/clusterB/", false).setConnectorPingTimeout(10).setConnectorPingInterval(999).setMinEventDelay(MIN_EVENT_DELAY).build();
    instance4 = newBuilder().setDebugName("instance4").useRepositoryOf(instance3).setConnectorPingTimeout(10).setConnectorPingInterval(999).setMinEventDelay(MIN_EVENT_DELAY).build();
    instance5 = newBuilder().setDebugName("instance5").newRepository("/var/discovery/clusterC/", false).setConnectorPingTimeout(10).setConnectorPingInterval(999).setMinEventDelay(MIN_EVENT_DELAY).build();
    // join the instances to form a cluster by sending out heartbeats
    runHeartbeatOnceWith(instance1, instance2, instance3, instance4, instance5);
    Thread.sleep(500);
    runHeartbeatOnceWith(instance1, instance2, instance3, instance4, instance5);
    Thread.sleep(500);
    runHeartbeatOnceWith(instance1, instance2, instance3, instance4, instance5);
    Thread.sleep(500);
    assertSameTopology(new SimpleClusterView(instance1, instance2));
    assertSameTopology(new SimpleClusterView(instance3, instance4));
    assertSameTopology(new SimpleClusterView(instance5));
    // create a topology connector from instance3 to instance1
    // -> corresponds to starting to ping
    runHeartbeatOnceWith(instance1, instance2, instance3, instance4, instance5);
    pingConnector(instance3, instance1);
    pingConnector(instance5, instance1);
    Thread.sleep(500);
    runHeartbeatOnceWith(instance1, instance2, instance3, instance4, instance5);
    pingConnector(instance3, instance1);
    pingConnector(instance5, instance1);
    Thread.sleep(500);
    // make asserts on the topology
    logger.info("testConnectorSwitching4139: instance1.slingId=" + instance1.slingId);
    logger.info("testConnectorSwitching4139: instance2.slingId=" + instance2.slingId);
    logger.info("testConnectorSwitching4139: instance3.slingId=" + instance3.slingId);
    logger.info("testConnectorSwitching4139: instance4.slingId=" + instance4.slingId);
    logger.info("testConnectorSwitching4139: instance5.slingId=" + instance5.slingId);
    instance1.dumpRepo();
    assertSameTopology(new SimpleClusterView(instance1, instance2), new SimpleClusterView(instance3, instance4), new SimpleClusterView(instance5));
    // simulate a crash of instance1, resulting in load-balancer to switch the pings
    boolean success = false;
    for (int i = 0; i < 25; i++) {
        // loop for max 25 times, min 20 times
        runHeartbeatOnceWith(instance2, instance3, instance4, instance5);
        final boolean ping1 = pingConnector(instance3, instance2);
        final boolean ping2 = pingConnector(instance5, instance2);
        if (ping1 && ping2) {
            // both pings were fine - hence break
            success = true;
            logger.info("testConnectorSwitching4139: successfully switched all pings to instance2 after " + i + " rounds.");
            if (i < 20) {
                logger.info("testConnectorSwitching4139: min loop cnt not yet reached: i=" + i);
                // 20x1000ms = 20sec max - (vs 10sec timeout) - should be enough for timing out
                Thread.sleep(1000);
                continue;
            }
            break;
        }
        logger.info("testConnectorSwitching4139: looping cos ping1=" + ping1 + ", ping2=" + ping2);
        // 25x1000ms = 25sec max - (vs 10sec timeout)
        Thread.sleep(1000);
    }
    assertTrue(success);
    // one final heartbeat
    runHeartbeatOnceWith(instance2, instance3, instance4, instance5);
    assertTrue(pingConnector(instance3, instance2));
    assertTrue(pingConnector(instance5, instance2));
    instance2.dumpRepo();
    assertSameTopology(new SimpleClusterView(instance2), new SimpleClusterView(instance3, instance4), new SimpleClusterView(instance5));
    // restart instance1, crash instance4
    instance4.stopViewChecker();
    instance1Restarted = newBuilder().setDebugName("instance1").useRepositoryOf(instance2).setConnectorPingTimeout(Integer.MAX_VALUE).setMinEventDelay(1).setSlingId(instance1.getSlingId()).build();
    runHeartbeatOnceWith(instance1Restarted, instance2, instance3, instance5);
    // give these heartbeats/votes some time .. so sleep 2sec (timeout is 10sec, so should be safe)
    Thread.sleep(2000);
    assertTrue(pingConnector(instance3, instance2));
    assertTrue(pingConnector(instance5, instance2));
    success = false;
    for (int i = 0; i < 40; i++) {
        runHeartbeatOnceWith(instance1Restarted, instance2, instance3, instance5);
        instance1.getViewChecker().checkView();
        // since instance3 *can* have an undefined cluster view..
        try {
            pingConnector(instance3, instance2);
        } catch (UndefinedClusterViewException ucve) {
        // ignore
        }
        pingConnector(instance5, instance2);
        final TopologyView topology = instance3.getDiscoveryService().getTopology();
        InstanceDescription i3 = null;
        for (Iterator<InstanceDescription> it = topology.getInstances().iterator(); it.hasNext(); ) {
            final InstanceDescription id = it.next();
            if (id.getSlingId().equals(instance3.slingId)) {
                i3 = id;
                break;
            }
        }
        assertNotNull(i3);
        assertEquals(instance3.slingId, i3.getSlingId());
        final ClusterView i3Cluster = i3.getClusterView();
        final int i3ClusterSize = i3Cluster.getInstances().size();
        if (i3ClusterSize == 1) {
            if (i < 30) {
                logger.info("testConnectorSwitching4139: [2] min loop cnt not yet reached: i=" + i);
                // 30x500ms = 15sec max - (vs 10sec-2sec[sleep] timeout) - should be enough for timing out
                Thread.sleep(500);
                continue;
            }
            success = true;
            logger.info("testConnectorSwitching4139: i3ClusterSize: " + i3ClusterSize + ", i=" + i + " (success)");
            break;
        }
        logger.info("testConnectorSwitching4139: i3ClusterSize: " + i3ClusterSize + ", i=" + i);
        Thread.sleep(500);
    }
    logger.info("testConnectorSwitching4139: instance1Restarted.slingId=" + instance1Restarted.slingId);
    logger.info("testConnectorSwitching4139: instance2.slingId=" + instance2.slingId);
    logger.info("testConnectorSwitching4139: instance3.slingId=" + instance3.slingId);
    logger.info("testConnectorSwitching4139: instance4.slingId=" + instance4.slingId);
    logger.info("testConnectorSwitching4139: instance5.slingId=" + instance5.slingId);
    instance1Restarted.dumpRepo();
    assertTrue(success);
    assertSameTopology(new SimpleClusterView(instance1Restarted, instance2), new SimpleClusterView(instance3), new SimpleClusterView(instance5));
    instance1Restarted.stop();
}

Example 4 with TopologyView

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

the class AbstractDiscoveryServiceTest method assertStableTopology.

private void assertStableTopology(Tester... instances) {
    for (Tester tester : instances) {
        logger.info("asserting tester: " + tester.instance.getDebugName());
        TopologyEvent lastEvent = tester.previousEvent;
        Type type = lastEvent.getType();
        if (type == Type.TOPOLOGY_CHANGED || type == Type.TOPOLOGY_INIT) {
        // fine
        } else {
            fail("wrong type, expected CHANGED or INIT, got: " + type);
        }
        assertNotNull(lastEvent.getNewView());
        assertEquals(instances.length, lastEvent.getNewView().getInstances().size());
        TopologyView t = tester.instance.getDiscoveryService().getTopology();
        assertTrue(t.isCurrent());
        assertEquals(instances.length, t.getInstances().size());
    }
}

Example 5 with TopologyView

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

the class AbstractDiscoveryServiceTest method isStableTopology.

private boolean isStableTopology(Tester... instances) {
    for (Tester tester : instances) {
        TopologyEvent lastEvent = tester.previousEvent;
        if (lastEvent == null) {
            return false;
        }
        Type type = lastEvent.getType();
        if (type == Type.TOPOLOGY_CHANGED || type == Type.TOPOLOGY_INIT) {
        // fine
        } else {
            return false;
        }
        TopologyView newView = lastEvent.getNewView();
        if (newView == null) {
            return false;
        }
        if (instances.length != newView.getInstances().size()) {
            return false;
        }
        TopologyView t = tester.instance.getDiscoveryService().getTopology();
        if (!t.isCurrent()) {
            return false;
        }
        if (instances.length != t.getInstances().size()) {
            return false;
        }
        for (Tester t2 : instances) {
            boolean foundMatch = false;
            for (InstanceDescription id : t.getInstances()) {
                if (t2.instance.getSlingId().equals(id.getSlingId())) {
                    foundMatch = true;
                    break;
                }
            }
            if (!foundMatch) {
                return false;
            }
        }
    }
    return true;
}