Examples with GroupListener io.fabric8.groups.GroupListener used on opensource projects

Example 1 with GroupListener

use of io.fabric8.groups.GroupListener in project fabric8 by jboss-fuse.

the class FabricDiscoveryAgent method initGroup.

private synchronized void initGroup() throws Exception {
    group = (MultiGroup) factory.createMultiGroup("/fabric/registry/clusters/amq/" + groupName, ActiveMQNode.class, new NamedThreadFactory("zkgroup-fabric-mq-discovery"));
    group.add(new GroupListener<ActiveMQNode>() {

        @Override
        public void groupEvent(Group<ActiveMQNode> group, GroupEvent event) {
            LOG.debug("Event: " + event);
            Map<String, ActiveMQNode> masters = new HashMap<String, ActiveMQNode>();
            for (ActiveMQNode node : group.members().values()) {
                if (!masters.containsKey(node.id)) {
                    masters.put(node.id, node);
                }
            }
            update(masters.values());
        }
    });
}

Example 2 with GroupListener

use of io.fabric8.groups.GroupListener in project fabric8 by jboss-fuse.

the class ServiceFactoryTest method testCallbackOnDisconnectCanClose.

@Test
public void testCallbackOnDisconnectCanClose() throws Exception {
    curator.close();
    LOG.info("....");
    SocketProxy socketProxy = new SocketProxy(new URI("tcp://localhost:" + zkPort));
    final CuratorFramework proxyCurator = CuratorFrameworkFactory.builder().connectString("localhost:" + socketProxy.getUrl().getPort()).sessionTimeoutMs(5000).connectionTimeoutMs(3000).retryPolicy(new RetryNTimes(10, 1000)).build();
    proxyCurator.start();
    proxyCurator.getZookeeperClient().blockUntilConnectedOrTimedOut();
    LOG.info("curator is go: " + proxyCurator);
    final String path = "/singletons/test/threads" + System.currentTimeMillis() + "**";
    final ArrayList<Runnable> members = new ArrayList<Runnable>();
    final int nThreads = 1;
    final CountDownLatch gotDisconnectEvent = new CountDownLatch(1);
    class GroupRunnable implements Runnable, GroupListener<NodeState> {

        final int id;

        private final BlockingQueue<Integer> jobQueue = new LinkedBlockingDeque<Integer>();

        ZooKeeperGroup<NodeState> group;

        NodeState nodeState;

        public GroupRunnable(int id) {
            this.id = id;
            members.add(this);
            nodeState = new NodeState("foo" + id);
        }

        @Override
        public void run() {
            group = new ZooKeeperGroup<NodeState>(proxyCurator, path, NodeState.class);
            group.add(this);
            LOG.info("run: Added: " + this);
            try {
                while (true) {
                    switch(jobQueue.take()) {
                        case 0:
                            LOG.info("run: close: " + this);
                            try {
                                group.close();
                            } catch (IOException ignored) {
                            }
                            return;
                        case 1:
                            LOG.info("run: start: " + this);
                            group.start();
                            group.update(nodeState);
                            break;
                        case 2:
                            LOG.info("run: update: " + this);
                            nodeState.setId(nodeState.getId() + id);
                            group.update(nodeState);
                            break;
                    }
                }
            } catch (InterruptedException exit) {
            }
        }

        @Override
        public void groupEvent(Group<NodeState> group, GroupEvent event) {
            LOG.info("Got: event: " + event);
            if (event.equals(GroupEvent.DISCONNECTED)) {
                gotDisconnectEvent.countDown();
            }
        }
    }
    ;
    ExecutorService executorService = Executors.newFixedThreadPool(nThreads);
    for (int i = 0; i < nThreads; i++) {
        executorService.execute(new GroupRunnable(i));
    }
    for (Runnable r : members) {
        GroupRunnable groupRunnable = (GroupRunnable) r;
        groupRunnable.jobQueue.offer(1);
        // wait for registration
        while (groupRunnable.group == null || groupRunnable.group.getId() == null) {
            TimeUnit.MILLISECONDS.sleep(100);
        }
    }
    boolean firsStartedIsMaster = ((GroupRunnable) members.get(0)).group.isMaster();
    assertTrue("first started is master", firsStartedIsMaster);
    LOG.info("got master...");
    // lets see how long they take to notice a no responses to heart beats
    socketProxy.pause();
    // splash in an update
    for (Runnable r : members) {
        GroupRunnable groupRunnable = (GroupRunnable) r;
        groupRunnable.jobQueue.offer(2);
    }
    boolean hasMaster = true;
    while (hasMaster) {
        for (Runnable r : members) {
            GroupRunnable groupRunnable = (GroupRunnable) r;
            hasMaster &= groupRunnable.group.isMaster();
        }
        if (hasMaster) {
            LOG.info("Waiting for no master state on proxy pause");
            TimeUnit.SECONDS.sleep(1);
        }
    }
    try {
        boolean gotDisconnect = gotDisconnectEvent.await(15, TimeUnit.SECONDS);
        assertTrue("got disconnect event", gotDisconnect);
        LOG.info("do close");
        for (Runnable r : members) {
            GroupRunnable groupRunnable = (GroupRunnable) r;
            groupRunnable.jobQueue.offer(0);
        }
        executorService.shutdown();
        // at a min when the session has expired
        boolean allThreadComplete = executorService.awaitTermination(6, TimeUnit.SECONDS);
        assertTrue("all threads complete", allThreadComplete);
    } finally {
        proxyCurator.close();
        socketProxy.close();
    }
}

Example 3 with GroupListener

use of io.fabric8.groups.GroupListener in project fabric8 by jboss-fuse.

the class ServiceFactoryTest method testThreadsOnTimeout.

@Test
public void testThreadsOnTimeout() throws Exception {
    curator.close();
    SocketProxy socketProxy = new SocketProxy(new URI("tcp://localhost:" + zkPort));
    final CuratorFramework proxyCurator = CuratorFrameworkFactory.builder().connectString("localhost:" + socketProxy.getUrl().getPort()).sessionTimeoutMs(5000).connectionTimeoutMs(3000).retryPolicy(new RetryNTimes(10, 1000)).build();
    proxyCurator.start();
    proxyCurator.getZookeeperClient().blockUntilConnectedOrTimedOut();
    LOG.info("curator is go: " + proxyCurator);
    final String path = "/singletons/test/threads" + System.currentTimeMillis() + "**";
    final ArrayList<Runnable> members = new ArrayList<Runnable>();
    final int nThreads = 1;
    class GroupRunnable implements Runnable, GroupListener<NodeState> {

        final int id;

        private final BlockingQueue<Integer> jobQueue = new LinkedBlockingDeque<Integer>();

        ZooKeeperGroup<NodeState> group;

        NodeState nodeState;

        public GroupRunnable(int id) {
            this.id = id;
            members.add(this);
            nodeState = new NodeState("foo" + id);
        }

        @Override
        public void run() {
            group = new ZooKeeperGroup<NodeState>(proxyCurator, path, NodeState.class);
            group.add(this);
            LOG.info("run: Added: " + this);
            try {
                while (true) {
                    switch(jobQueue.take()) {
                        case 0:
                            LOG.info("run: close: " + this);
                            try {
                                group.close();
                            } catch (IOException ignored) {
                            }
                            return;
                        case 1:
                            LOG.info("run: start: " + this);
                            group.start();
                            group.update(nodeState);
                            break;
                        case 2:
                            LOG.info("run: update: " + this);
                            nodeState.setId(nodeState.getId() + id);
                            group.update(nodeState);
                            break;
                    }
                }
            } catch (InterruptedException exit) {
            }
        }

        @Override
        public void groupEvent(Group<NodeState> group, GroupEvent event) {
        }
    }
    ;
    ExecutorService executorService = Executors.newFixedThreadPool(nThreads);
    for (int i = 0; i < nThreads; i++) {
        executorService.execute(new GroupRunnable(i));
    }
    for (Runnable r : members) {
        GroupRunnable groupRunnable = (GroupRunnable) r;
        groupRunnable.jobQueue.offer(1);
        // wait for registration
        while (groupRunnable.group == null || groupRunnable.group.getId() == null) {
            TimeUnit.MILLISECONDS.sleep(100);
        }
    }
    boolean firsStartedIsMaster = ((GroupRunnable) members.get(0)).group.isMaster();
    assertTrue("first started is master", firsStartedIsMaster);
    LOG.info("got master...");
    // lets see how long they take to notice a no responses to heart beats
    socketProxy.pause();
    // splash in an update
    for (Runnable r : members) {
        GroupRunnable groupRunnable = (GroupRunnable) r;
        groupRunnable.jobQueue.offer(2);
    }
    boolean hasMaster = true;
    while (hasMaster) {
        for (Runnable r : members) {
            GroupRunnable groupRunnable = (GroupRunnable) r;
            hasMaster &= groupRunnable.group.isMaster();
        }
        if (hasMaster) {
            LOG.info("Waiting for no master state on proxy pause");
            TimeUnit.SECONDS.sleep(1);
        }
    }
    for (Runnable r : members) {
        GroupRunnable groupRunnable = (GroupRunnable) r;
        groupRunnable.jobQueue.offer(0);
    }
    executorService.shutdown();
    // at a min when the session has expired
    boolean allThreadComplete = executorService.awaitTermination(6, TimeUnit.SECONDS);
    proxyCurator.close();
    socketProxy.close();
    assertTrue("all threads complete", allThreadComplete);
}