Examples with MyMp com.nokia.dempsy.cluster.zookeeper.FullApplication.MyMp used on opensource projects

Example 1 with MyMp

use of com.nokia.dempsy.cluster.zookeeper.FullApplication.MyMp in project Dempsy by Dempsy.

the class TestFullApp method testFailover.

@Test
public void testFailover() throws Throwable {
    // now start each cluster
    ctx[0] = "fullApp/Dempsy-FullUp.xml";
    Map<ClusterId, DempsyHolder> dempsys = new HashMap<ClusterId, DempsyHolder>();
    DempsyHolder spare = new DempsyHolder();
    try {
        ApplicationDefinition ad = new FullApplication().getTopology();
        ad.initialize();
        List<ClusterDefinition> clusters = ad.getClusterDefinitions();
        for (int i = clusters.size() - 1; i >= 0; i--) {
            ClusterDefinition cluster = clusters.get(i);
            CheckCluster.toCheckAgainst = cluster.getClusterId();
            DempsyHolder cur = new DempsyHolder();
            cur.clusterid = cluster.getClusterId();
            cur.actx = new ClassPathXmlApplicationContext(ctx);
            cur.actx.registerShutdownHook();
            cur.dempsy = (Dempsy) cur.actx.getBean("dempsy");
            cur.dempsy.start();
            dempsys.put(cluster.getClusterId(), cur);
        }
        // get the last FullApplication in the processing chain.
        ClassPathXmlApplicationContext actx = dempsys.get(new ClusterId(FullApplication.class.getSimpleName(), MyRankMp.class.getSimpleName())).actx;
        final FullApplication app = (FullApplication) actx.getBean("app");
        // this checks that the throughput works.
        assertTrue(poll(baseTimeoutMillis * 5, app, new Condition<Object>() {

            @Override
            public boolean conditionMet(Object o) {
                return app.finalMessageCount.get() > 100;
            }
        }));
        // now start another MyMp cluster.
        spare = new DempsyHolder();
        spare.clusterid = new ClusterId(FullApplication.class.getSimpleName(), MyMp.class.getSimpleName());
        CheckCluster.toCheckAgainst = spare.clusterid;
        spare.actx = new ClassPathXmlApplicationContext(ctx);
        spare.dempsy = (Dempsy) spare.actx.getBean("dempsy");
        spare.dempsy.start();
        Dempsy.Application.Cluster cluster = spare.dempsy.getCluster(spare.clusterid);
        Dempsy.Application.Cluster.Node node = cluster.getNodes().get(0);
        final StatsCollector collector = node.getStatsCollector();
        // we are going to create another node of the MyMp via a test hack
        cluster = spare.dempsy.getCluster(new ClusterId(FullApplication.class.getSimpleName(), MyMp.class.getSimpleName()));
        node = cluster.getNodes().get(0);
        final MyMp spareprototype = (MyMp) node.getMpContainer().getPrototype();
        // TODO, see if we really need that check, and if so, implement
        // an alternate way to get it, since with the stats collector rework
        // we no longer use an independent MetricsRegistry per StatsCollector 
        // instance.
        assertEquals(0, ((MetricGetters) collector).getDispatchedMessageCount());
        assertEquals(0, spareprototype.myMpReceived.get());
        // now bring down the original
        DempsyHolder original = dempsys.get(spare.clusterid);
        final MyMp originalprototype = (MyMp) original.dempsy.getCluster(spare.clusterid).getNodes().get(0).getMpContainer().getPrototype();
        final long originalNumMessages = originalprototype.myMpReceived.get();
        // makes sure the message count is still advancing
        assertTrue(poll(baseTimeoutMillis, app, new Condition<Object>() {

            @Override
            public boolean conditionMet(Object o) {
                return originalprototype.myMpReceived.get() > originalNumMessages;
            }
        }));
        // check one more time
        assertEquals(0, spareprototype.myMpReceived.get());
        // now stop the original ... the spare should pick up.
        original.dempsy.stop();
        // there's a race condition between the stop returning and the last message
        // being processed.
        // we need to check that a certain amount of time passes during which no more messages have been received.
        // if we haven't seen a message in 1/2 second then we
        final long numMillisecondsWithoutAMessage = 500;
        //  will assume that the messages have stopped.
        // now we wait until at least numMillisecondsWithoutAMessage goes by without the myMpReceived
        //  being incremented. This must happen within the baseTimeoutMillis or this check is
        //   considered failed.
        poll(baseTimeoutMillis + numMillisecondsWithoutAMessage, originalprototype, new Condition<Object>() {

            long startCheckingTime = System.currentTimeMillis();

            long lastMessage = originalprototype.myMpReceived.get();

            @Override
            public boolean conditionMet(Object o) {
                if (originalprototype.myMpReceived.get() != lastMessage) {
                    startCheckingTime = System.currentTimeMillis();
                    lastMessage = originalprototype.myMpReceived.get();
                    return false;
                } else
                    return (System.currentTimeMillis() - startCheckingTime) > numMillisecondsWithoutAMessage;
            }
        });
        // now check to see if the new one picked up.
        assertTrue(poll(baseTimeoutMillis, app, new Condition<Object>() {

            @Override
            public boolean conditionMet(Object o) {
                return spareprototype.myMpReceived.get() > 10;
            }
        }));
    } finally {
        ctx[0] = dempsyConfig;
        for (DempsyHolder cur : dempsys.values()) {
            cur.dempsy.stop();
            cur.actx.close();
        }
        if (spare.dempsy != null)
            spare.dempsy.stop();
        if (spare.actx != null)
            spare.actx.close();
    }
}

Example 2 with MyMp

use of com.nokia.dempsy.cluster.zookeeper.FullApplication.MyMp in project Dempsy by Dempsy.

the class TestFullApp method testStartForceMpDisconnectStop.

@Test
public void testStartForceMpDisconnectStop() throws Throwable {
    ClassPathXmlApplicationContext actx = null;
    Dempsy dempsy = null;
    try {
        logger.debug("Starting up the appliction context ...");
        actx = new ClassPathXmlApplicationContext(ctx);
        actx.registerShutdownHook();
        final FullApplication app = (FullApplication) actx.getBean("app");
        dempsy = (Dempsy) actx.getBean("dempsy");
        // Override the cluster session factory to keep track of the sessions asked for.
        // This is so that I can grab the ZookeeperSession that's being instantiated by
        // the MyMp cluster.
        zookeeperCluster = null;
        dempsy.setClusterSessionFactory(new ZookeeperSessionFactory(System.getProperty("zk_connect"), 5000) {

            int sessionCount = 0;

            @Override
            public synchronized ClusterInfoSession createSession() throws ClusterInfoException {
                sessionCount++;
                ClusterInfoSession ret = super.createSession();
                if (sessionCount == 2)
                    zookeeperCluster = (ZookeeperSession) ret;
                return ret;
            }
        });
        dempsy.start();
        Dempsy.Application.Cluster cluster = dempsy.getCluster(new ClusterId(FullApplication.class.getSimpleName(), MyAdaptor.class.getSimpleName()));
        Dempsy.Application.Cluster.Node node = cluster.getNodes().get(0);
        final StatsCollector collector = node.getStatsCollector();
        // this checks that the throughput works.
        assertTrue(poll(baseTimeoutMillis * 5, app, new Condition<Object>() {

            @Override
            public boolean conditionMet(Object o) {
                return app.finalMessageCount.get() > 10;
            }
        }));
        assertNotNull(zookeeperCluster);
        assertEquals(0, ((MetricGetters) collector).getDiscardedMessageCount());
        assertEquals(0, ((MetricGetters) collector).getMessageFailedCount());
        // ok ... so now we have stuff going all the way through. let's kick
        // the middle Mp's zookeeper cluster and see what happens.
        ZooKeeper origZk = zookeeperCluster.zkref.get();
        long sessionid = origZk.getSessionId();
        ZooKeeper killer = new ZooKeeper(System.getProperty("zk_connect"), 5000, new Watcher() {

            @Override
            public void process(WatchedEvent arg0) {
            }
        }, sessionid, null);
        // tricks the server into expiring the other session
        killer.close();
        //         // we should be getting failures now ... 
        //         // but it's possible that it can reconnect prior to actually seeing an error so if this 
        //         //   fails frequently we need to remove this test.
        //         assertTrue(poll(baseTimeoutMillis, app, new Condition()
        //         {
        //            @Override
        //            public boolean conditionMet(Object o)
        //            {
        //               return collector.getMessageFailedCount() > 1;
        //            }
        //         }));
        //... and then recover.
        // get the MyMp prototype
        cluster = dempsy.getCluster(new ClusterId(FullApplication.class.getSimpleName(), MyMp.class.getSimpleName()));
        node = cluster.getNodes().get(0);
        final MyMp prototype = (MyMp) node.getMpContainer().getPrototype();
        // so let's see where we are
        final long interimMessageCount = prototype.myMpReceived.get();
        // and now we should eventually get more as the session recovers.
        assertTrue(poll(baseTimeoutMillis * 5, app, new Condition<Object>() {

            @Override
            public boolean conditionMet(Object o) {
                return prototype.myMpReceived.get() > interimMessageCount + 100;
            }
        }));
    } finally {
        if (dempsy != null)
            dempsy.stop();
        if (actx != null)
            actx.close();
        if (dempsy != null)
            assertTrue(dempsy.waitToBeStopped(baseTimeoutMillis));
    }
}

Example 3 with MyMp

use of com.nokia.dempsy.cluster.zookeeper.FullApplication.MyMp in project Dempsy by Dempsy.

the class TestFullApp method testStartForceMpDisconnectWithStandby.

@Test
public void testStartForceMpDisconnectWithStandby() throws Throwable {
    ClassPathXmlApplicationContext actx = null;
    Dempsy dempsy = null;
    try {
        logger.debug("Starting up the appliction context ...");
        actx = new ClassPathXmlApplicationContext(ctx);
        actx.registerShutdownHook();
        final FullApplication app = (FullApplication) actx.getBean("app");
        dempsy = (Dempsy) actx.getBean("dempsy");
        // Override the cluster session factory to keep track of the sessions asked for.
        // This is so that I can grab the ZookeeperSession that's being instantiated by
        // the MyMp cluster.
        zookeeperCluster = null;
        dempsy.setClusterSessionFactory(new ZookeeperSessionFactory(System.getProperty("zk_connect"), 5000) {

            int sessionCount = 0;

            @Override
            public synchronized ClusterInfoSession createSession() throws ClusterInfoException {
                sessionCount++;
                ClusterInfoSession ret = super.createSession();
                if (sessionCount == 2)
                    zookeeperCluster = (ZookeeperSession) ret;
                return ret;
            }
        });
        dempsy.start();
        Dempsy.Application.Cluster cluster = dempsy.getCluster(new ClusterId(FullApplication.class.getSimpleName(), MyAdaptor.class.getSimpleName()));
        Dempsy.Application.Cluster.Node node = cluster.getNodes().get(0);
        final StatsCollector collector = node.getStatsCollector();
        // we are going to create another node of the MyMp via a test hack
        cluster = dempsy.getCluster(new ClusterId(FullApplication.class.getSimpleName(), MyMp.class.getSimpleName()));
        Dempsy.Application.Cluster.Node mpnode = cluster.getNodes().get(0);
        // this actually hoses the output schedule. It moves it to the new node due
        //  to a second call to setOutputInvoker.
        // the code for start instantiates a new node
        cluster.instantiateAndStartAnotherNodeForTesting();
        assertNotNull(zookeeperCluster);
        assertEquals(0, ((MetricGetters) collector).getDiscardedMessageCount());
        assertEquals(0, ((MetricGetters) collector).getMessageFailedCount());
        // ok ... so now we have stuff going all the way through. let's kick
        // the middle Mp's zookeeper cluster and see what happens.
        ZooKeeper origZk = zookeeperCluster.zkref.get();
        // this should kill it.
        origZk.close();
        // but just to be sure actually stop the node.
        mpnode.stop();
        // we should be getting failures now ... and then recover.
        // get the MyMp prototype
        cluster = dempsy.getCluster(new ClusterId(FullApplication.class.getSimpleName(), MyMp.class.getSimpleName()));
        // notice, we're getting the SECOND node.
        node = cluster.getNodes().get(1);
        final MyMp prototype = (MyMp) node.getMpContainer().getPrototype();
        // so let's see where we are
        final long interimMessageCount = prototype.myMpReceived.get();
        // and now we should eventually get more as the session recovers.
        assertTrue(poll(baseTimeoutMillis * 5, app, new Condition<Object>() {

            @Override
            public boolean conditionMet(Object o) {
                return prototype.myMpReceived.get() > interimMessageCount + 100;
            }
        }));
    } finally {
        if (dempsy != null)
            dempsy.stop();
        if (actx != null)
            actx.close();
        if (dempsy != null)
            assertTrue(dempsy.waitToBeStopped(baseTimeoutMillis));
    }
}