Package org.apache.curator.framework.recipes.leader

Examples of org.apache.curator.framework.recipes.leader.LeaderSelector

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        this.name = name;

        // create a leader selector using the given path for management
        // all participants in a given leader selection must use the same path
        // ExampleClient here is also a LeaderSelectorListener but this isn't required
        leaderSelector = new LeaderSelector(client, path, this);

        // for most cases you will want your instance to requeue when it relinquishes leadership
        leaderSelector.autoRequeue();
    }
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            @Override
            public void stateChanged(CuratorFramework client, ConnectionState newState)
            {
            }
        };
        LeaderSelector  selector = new LeaderSelector(client, "/leader", listener);
        try
        {
            client.start();
            client.create().creatingParentsIfNeeded().forPath("/one/two/three");

            Assert.assertNotNull(client.checkExists().forPath("/one/two/three"));

            selector.start();
            timing.awaitLatch(latch);

            Assert.assertNull(client.checkExists().forPath("/one/two/three"));
        }
        finally
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            @Override
            public void stateChanged(CuratorFramework client, ConnectionState newState)
            {
            }
        };
        LeaderSelector selector = new LeaderSelector(client, "/leader", listener);
        try
        {
            client.start();
            client.create().creatingParentsIfNeeded().forPath("/one/two/three");

            Assert.assertNotNull(client.checkExists().forPath("/one/two/three"));

            selector.start();
            timing.awaitLatch(latch);

            Assert.assertNull(client.checkExists().forPath("/one/two/three"));
        }
        finally
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      final ServiceAnnouncer serviceAnnouncer,
      final ServiceEmitter emitter
  )
  {
    this.taskActionClientFactory = taskActionClientFactory;
    this.leaderSelector = new LeaderSelector(
        curator,
        zkPaths.getIndexerLeaderLatchPath(),
        new LeaderSelectorListener()
        {
          @Override
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            @Override
            public void stateChanged(CuratorFramework client, ConnectionState newState)
            {
            }
        };
        LeaderSelector  selector = new LeaderSelector(client, "/leader", listener);
        try
        {
            client.start();
            client.create().creatingParentsIfNeeded().forPath("/one/two/three");

            Assert.assertNotNull(client.checkExists().forPath("/one/two/three"));

            selector.start();
            timing.awaitLatch(latch);

            Assert.assertNull(client.checkExists().forPath("/one/two/three"));
        }
        finally
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    public void testConnectionStateListener() throws Exception
    {
        server.close();

        final StringBuilder listenerSequence = new StringBuilder();
        LeaderSelector selector = null;
        Timing timing = new Timing();
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(100));
        try
        {
            client.start();
            timing.sleepABit();

            LeaderSelectorListener listenerLeader = new LeaderSelectorListenerAdapter()
            {
                @Override
                public void takeLeadership(CuratorFramework client) throws Exception
                {
                    Thread.currentThread().join();
                }
            };
            selector = new LeaderSelector(client, "/leader", listenerLeader);
            selector.autoRequeue();
            selector.start();

            ConnectionStateListener listener1 = new ConnectionStateListener()
            {
                @Override
                public void stateChanged(CuratorFramework client, ConnectionState newState)
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        this.name = name;

        // create a leader selector using the given path for management
        // all participants in a given leader selection must use the same path
        // ExampleClient here is also a LeaderSelectorListener but this isn't required
        leaderSelector = new LeaderSelector(client, path, this);

        // for most cases you will want your instance to requeue when it relinquishes leadership
        leaderSelector.autoRequeue();
    }
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            @Override
            public void stateChanged(CuratorFramework client, ConnectionState newState)
            {
            }
        };
        LeaderSelector  selector = new LeaderSelector(client, "/leader", listener);
        try
        {
            client.start();
            client.create().creatingParentsIfNeeded().forPath("/one/two/three");

            Assert.assertNotNull(client.checkExists().forPath("/one/two/three"));

            selector.start();
            timing.awaitLatch(latch);

            Assert.assertNull(client.checkExists().forPath("/one/two/three"));
        }
        finally
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            @Override
            public void stateChanged(CuratorFramework client, ConnectionState newState)
            {
            }
        };
        LeaderSelector selector = new LeaderSelector(client, "/leader", listener);
        try
        {
            client.start();
            client.create().creatingParentsIfNeeded().forPath("/one/two/three");

            Assert.assertNotNull(client.checkExists().forPath("/one/two/three"));

            selector.start();
            timing.awaitLatch(latch);

            Assert.assertNull(client.checkExists().forPath("/one/two/three"));
        }
        finally
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    public void testConnectionStateListener() throws Exception
    {
        server.close();

        final StringBuilder listenerSequence = new StringBuilder();
        LeaderSelector selector = null;
        Timing timing = new Timing();
        CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(100));
        try
        {
            client.start();
            timing.sleepABit();

            LeaderSelectorListener listenerLeader = new LeaderSelectorListenerAdapter()
            {
                @Override
                public void takeLeadership(CuratorFramework client) throws Exception
                {
                    Thread.currentThread().join();
                }
            };
            selector = new LeaderSelector(client, "/leader", listenerLeader);
            selector.autoRequeue();
            selector.start();

            ConnectionStateListener listener1 = new ConnectionStateListener()
            {
                @Override
                public void stateChanged(CuratorFramework client, ConnectionState newState)
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  • org.apache.curator.utils.CloseableExecutorService
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