Examples with Dispatcher net.dempsy.messages.Dispatcher used on opensource projects

Example 1 with Dispatcher

use of net.dempsy.messages.Dispatcher in project Dempsy by Dempsy.

the class TestElasticity method testNumberCountAddOneThenDrop.

@Test
public void testNumberCountAddOneThenDrop() throws Throwable {
    runCombos("testNumberCountAddOneThenDrop", (r, c, s, t, ser) -> isElasticRoutingStrategy(r), actxPath, ns -> {
        // keepGoing is for the separate thread that pumps messages into the system.
        final AtomicBoolean keepGoing = new AtomicBoolean(true);
        try {
            LOGGER.trace("==== <- Starting");
            final List<NodeManagerWithContext> nodes = new ArrayList<>(ns.nodes);
            // grab the adaptor from the 0'th cluster + the 0'th (only) node.
            final NumberProducer adaptor = nodes.get(0).ctx.getBean(NumberProducer.class);
            // grab access to the Dispatcher from the Adaptor
            final Dispatcher dispatcher = adaptor.dispatcher;
            // This is a Runnable that will pump messages to the dispatcher until keepGoing is
            // flipped to 'false.' It's stateless so it can be reused as needed.
            final AtomicInteger rankIndexToSend = new AtomicInteger(0);
            final Runnable sendMessages = () -> {
                // for an integer is the integer itself so we can get every shard by sending
                while (keepGoing.get()) {
                    for (int num = 0; num < 20; num++) {
                        final int number = num;
                        dispatcher.dispatch(uncheck(() -> ke.extract(new Number(number, rankIndexToSend.get()))));
                    }
                }
            };
            try (final ClusterInfoSession session = ns.sessionFactory.createSession()) {
                waitForEvenShardDistribution(session, "test-cluster1", 3, nodes);
                // Grab the one NumberRank Mp from the single Node in the third (0 base 2nd) cluster.
                final NumberRank rank = nodes.get(4).ctx.getBean(NumberRank.class);
                runACycle(keepGoing, rankIndexToSend.get(), rank, sendMessages);
                // now, bring online another instance.
                LOGGER.trace("==== starting a new one");
                nodes.add(makeNode(new String[] { "elasticity/mp-num-count.xml" }));
                waitForEvenShardDistribution(session, "test-cluster1", 4, nodes);
                // make sure everything still goes through
                runACycle(keepGoing, rankIndexToSend.incrementAndGet(), rank, sendMessages);
                // now kill a node.
                final NodeManagerWithContext nm = nodes.remove(2);
                LOGGER.trace("==== Stopping middle node servicing shards ");
                nm.manager.stop();
                waitForEvenShardDistribution(session, "test-cluster1", 3, nodes);
                LOGGER.trace("==== Stopped middle Dempsy");
                // make sure everything still goes through
                runACycle(keepGoing, rankIndexToSend.incrementAndGet(), rank, sendMessages);
            }
        } finally {
            keepGoing.set(false);
            LOGGER.trace("==== Exiting test.");
        }
    });
}

Example 2 with Dispatcher

use of net.dempsy.messages.Dispatcher in project Dempsy by Dempsy.

the class TestElasticity method testNumberCountDropOneAndReAdd.

@Test
public void testNumberCountDropOneAndReAdd() throws Throwable {
    runCombos("testNumberCountDropOneAndReAdd", (r, c, s, t, ser) -> isElasticRoutingStrategy(r), actxPath, ns -> {
        // keepGoing is for the separate thread that pumps messages into the system.
        final AtomicBoolean keepGoing = new AtomicBoolean(true);
        try {
            LOGGER.trace("==== <- Starting");
            final List<NodeManagerWithContext> nodes = new ArrayList<>(ns.nodes);
            // grab the adaptor from the 0'th cluster + the 0'th (only) node.
            final NumberProducer adaptor = nodes.get(0).ctx.getBean(NumberProducer.class);
            // grab access to the Dispatcher from the Adaptor
            final Dispatcher dispatcher = adaptor.dispatcher;
            // This is a Runnable that will pump messages to the dispatcher until keepGoing is
            // flipped to 'false.' It's stateless so it can be reused as needed.
            final AtomicInteger rankIndexToSend = new AtomicInteger(0);
            final Runnable sendMessages = () -> {
                // for an integer is the integer itself so we can get every shard by sending
                while (keepGoing.get()) {
                    for (int num = 0; num < 20; num++) {
                        final int number = num;
                        dispatcher.dispatch(uncheck(() -> ke.extract(new Number(number, rankIndexToSend.get()))));
                    }
                }
            };
            try (final ClusterInfoSession session = ns.sessionFactory.createSession()) {
                waitForEvenShardDistribution(session, "test-cluster1", 3, ns.nodes);
                // Grab the one NumberRank Mp from the single Node in the third (0 base 2nd) cluster.
                final NumberRank rank = nodes.get(4).ctx.getBean(NumberRank.class);
                runACycle(keepGoing, rankIndexToSend.get(), rank, sendMessages);
                // now kill a node.
                final NodeManagerWithContext nm = nodes.remove(2);
                LOGGER.trace("==== Stopping middle node servicing shards ");
                nm.manager.stop();
                waitForEvenShardDistribution(session, "test-cluster1", 2, nodes);
                LOGGER.trace("==== Stopped middle Dempsy");
                // make sure everything still goes through
                runACycle(keepGoing, rankIndexToSend.incrementAndGet(), rank, sendMessages);
                // now, bring online another instance.
                LOGGER.trace("==== starting a new one");
                nodes.add(makeNode(new String[] { "elasticity/mp-num-count.xml" }));
                waitForEvenShardDistribution(session, "test-cluster1", 3, nodes);
                // make sure everything still goes through
                runACycle(keepGoing, rankIndexToSend.incrementAndGet(), rank, sendMessages);
            }
        } finally {
            keepGoing.set(false);
            LOGGER.trace("==== Exiting test.");
        }
    });
}

Example 3 with Dispatcher

use of net.dempsy.messages.Dispatcher in project Dempsy by Dempsy.

the class TestElasticity method testExpansionPassivation.

@Test
public void testExpansionPassivation() throws Exception {
    final String[][] actxPath = { { "elasticity/adaptor.xml" }, { "elasticity/mp-num-count.xml" }, { "elasticity/mp-num-rank.xml" } };
    runCombos("testExpansionPassivation", (r, c, s, t, ser) -> isElasticRoutingStrategy(r), actxPath, ns -> {
        final AtomicBoolean keepGoing = new AtomicBoolean(true);
        try {
            final List<NodeManagerWithContext> nodes = new ArrayList<>(ns.nodes);
            // grab the adaptor from the 0'th cluster + the 0'th (only) node.
            final NumberProducer adaptor = nodes.get(0).ctx.getBean(NumberProducer.class);
            // grab access to the Dispatcher from the Adaptor
            final Dispatcher dispatcher = adaptor.dispatcher;
            final AtomicInteger rankIndexToSend = new AtomicInteger(0);
            final Runnable sendMessages = () -> {
                // for an integer is the integer itself so we can get every shard by sending
                while (keepGoing.get()) {
                    for (int num = 0; num < 20; num++) {
                        final int number = num;
                        dispatcher.dispatch(uncheck(() -> ke.extract(new Number(number, rankIndexToSend.get()))));
                    }
                }
            };
            try (final ClusterInfoSession session = ns.sessionFactory.createSession()) {
                waitForEvenShardDistribution(session, "test-cluster1", 1, nodes);
                final NumberRank rank = nodes.get(2).ctx.getBean(NumberRank.class);
                runACycle(keepGoing, rankIndexToSend.get(), rank, sendMessages);
                // now we have 20 Mps in test-cluster1
                final ClusterMetricGetters sc = (ClusterMetricGetters) nodes.get(1).manager.getClusterStatsCollector(new ClusterId(currentAppName, "test-cluster1"));
                assertEquals(20L, sc.getMessageProcessorCount());
                // add a second node for the cluster test-cluster1
                nodes.add(makeNode(new String[] { "elasticity/mp-num-count.xml" }));
                waitForEvenShardDistribution(session, "test-cluster1", 2, nodes);
                // about 1/2 should drop out.
                assertTrue(poll(o -> {
                    // System.err.println(sc.getMessageProcessorCount());
                    return sc.getMessageProcessorCount() < 15L;
                }));
            }
        } finally {
            keepGoing.set(false);
        }
    });
}

Example 4 with Dispatcher

use of net.dempsy.messages.Dispatcher in project Dempsy by Dempsy.

the class TestElasticity method testForProfiler.

@Test
public void testForProfiler() throws Throwable {
    try {
        // set up the test.
        final Number[] numbers = new Number[profilerTestNumberCount];
        final Random random = new Random();
        for (int i = 0; i < numbers.length; i++) numbers[i] = new Number(random.nextInt(1000), 0);
        final KeyExtractor ke = new KeyExtractor();
        runCombos("testForProfiler", (r, c, s, t, ser) -> isElasticRoutingStrategy(r), actxPath, new String[][][] { null, { { "min_nodes", "3" } }, { { "min_nodes", "3" } }, { { "min_nodes", "3" } }, null }, ns -> {
            final List<NodeManagerWithContext> nodes = ns.nodes;
            // Grab the one NumberRank Mp from the single Node in the third (0 base 2nd) cluster.
            final NumberRank rank = nodes.get(4).ctx.getBean(NumberRank.class);
            try (final ClusterInfoSession session = ns.sessionFactory.createSession()) {
                waitForEvenShardDistribution(session, "test-cluster1", 3, nodes);
                // get the Adaptor Router's statCollector
                final List<NodeMetricGetters> scs = nodes.stream().map(nwm -> nwm.manager).map(nm -> nm.getNodeStatsCollector()).map(sc -> (NodeMetricGetters) sc).collect(Collectors.toList());
                // grab the adaptor from the 0'th cluster + the 0'th (only) node.
                final NumberProducer adaptor = nodes.get(0).ctx.getBean(NumberProducer.class);
                // grab access to the Dispatcher from the Adaptor
                final Dispatcher dispatcher = adaptor.dispatcher;
                final long startTime = System.currentTimeMillis();
                for (int i = 0; i < numbers.length; i++) dispatcher.dispatch(ke.extract(numbers[i]));
                LOGGER.info("====> Checking exact count.");
                // keep going as long as they are trickling in.
                assertTrue(() -> {
                    IntStream.range(0, scs.size()).forEach(i -> {
                        System.out.println("======> " + i);
                        final NodeMetricGetters mg = scs.get(i);
                        if (mg != null) {
                            System.out.println("discarded: " + mg.getDiscardedMessageCount());
                            System.out.println("not sent: " + mg.getMessagesNotSentCount());
                        }
                    });
                    return "expected: " + profilerTestNumberCount + " but was: " + (rank.totalMessages.get() + scs.get(0).getMessagesNotSentCount()) + ", (delivered: " + rank.totalMessages.get() + ", not sent: " + scs.get(0).getMessagesNotSentCount() + ")";
                }, poll(o -> profilerTestNumberCount == (rank.totalMessages.get() + scs.stream().map(sc -> new Long(sc.getMessagesNotSentCount())).reduce(new Long(0), (v1, v2) -> new Long(v1.longValue() + v2.longValue()).longValue()))));
                // assert that at least SOMETHING went through
                assertTrue(rank.totalMessages.get() > 0);
                LOGGER.info("testForProfiler time " + (System.currentTimeMillis() - startTime));
                @SuppressWarnings("unchecked") final AtomicLong count = nodes.stream().map(// get the NumberCounter Mp
                nmwc -> (MessageProcessor<NumberCounter>) nmwc.manager.getMp("test-cluster1")).filter(// if it exists
                l -> l != null).map(// pull the prototype
                l -> l.getPrototype().messageCount).reduce(new AtomicLong(0), // sum up all of the counts
                (v1, v2) -> new AtomicLong(v1.get() + v2.get()));
                assertEquals(profilerTestNumberCount, count.get());
            }
        });
    } catch (final Throwable th) {
        th.printStackTrace();
        throw th;
    }
}