Package org.apache.curator.test

Examples of org.apache.curator.test.TestingServer

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    @Test
    public void testCache() throws Exception
    {
        List<Closeable> closeables = Lists.newArrayList();
        TestingServer server = new TestingServer();
        closeables.add(server);
        try
        {
            CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
            closeables.add(client);
            client.start();

            ServiceDiscovery<String>    discovery = ServiceDiscoveryBuilder.builder(String.class).basePath("/discovery").client(client).build();
            closeables.add(discovery);
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    @Test
    public void         testCrashedServerMultiInstances() throws Exception
    {
        List<Closeable>     closeables = Lists.newArrayList();
        TestingServer       server = new TestingServer();
        closeables.add(server);
        try
        {
            Timing              timing = new Timing();
            CuratorFramework    client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
            closeables.add(client);
            client.start();

            final Semaphore             semaphore = new Semaphore(0);
            ServiceInstance<String>     instance1 = ServiceInstance.<String>builder().payload("thing").name("test").port(10064).build();
            ServiceInstance<String>     instance2 = ServiceInstance.<String>builder().payload("thing").name("test").port(10065).build();
            ServiceDiscovery<String>    discovery = new ServiceDiscoveryImpl<String>(client, "/test", new JsonInstanceSerializer<String>(String.class), instance1)
            {
                @Override
                protected void internalRegisterService(ServiceInstance<String> service) throws Exception
                {
                    super.internalRegisterService(service);
                    semaphore.release();
                }
            };
            closeables.add(discovery);
            discovery.start();
            discovery.registerService(instance2);

            timing.acquireSemaphore(semaphore, 2);
            Assert.assertEquals(discovery.queryForInstances("test").size(), 2);

            KillSession.kill(client.getZookeeperClient().getZooKeeper(), server.getConnectString());
            server.stop();

            server = new TestingServer(server.getPort(), server.getTempDirectory());
            closeables.add(server);

            timing.acquireSemaphore(semaphore, 2);
            Assert.assertEquals(discovery.queryForInstances("test").size(), 2);
        }
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    @Test
    public void         testCrashedServer() throws Exception
    {
        List<Closeable>     closeables = Lists.newArrayList();
        TestingServer       server = new TestingServer();
        closeables.add(server);
        try
        {
            Timing              timing = new Timing();
            CuratorFramework    client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
            closeables.add(client);
            client.start();

            final Semaphore             semaphore = new Semaphore(0);
            ServiceInstance<String>     instance = ServiceInstance.<String>builder().payload("thing").name("test").port(10064).build();
            ServiceDiscovery<String>    discovery = new ServiceDiscoveryImpl<String>(client, "/test", new JsonInstanceSerializer<String>(String.class), instance)
            {
                @Override
                protected void internalRegisterService(ServiceInstance<String> service) throws Exception
                {
                    super.internalRegisterService(service);
                    semaphore.release();
                }
            };
            closeables.add(discovery);
            discovery.start();

            timing.acquireSemaphore(semaphore);
            Assert.assertEquals(discovery.queryForInstances("test").size(), 1);

            KillSession.kill(client.getZookeeperClient().getZooKeeper(), server.getConnectString());
            server.stop();

            server = new TestingServer(server.getPort(), server.getTempDirectory());
            closeables.add(server);

            timing.acquireSemaphore(semaphore);
            Assert.assertEquals(discovery.queryForInstances("test").size(), 1);
        }
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    @Test
    public void         testCrashedInstance() throws Exception
    {
        List<Closeable>     closeables = Lists.newArrayList();
        TestingServer       server = new TestingServer();
        closeables.add(server);
        try
        {
            Timing              timing = new Timing();

            CuratorFramework    client = CuratorFrameworkFactory.newClient(server.getConnectString(), timing.session(), timing.connection(), new RetryOneTime(1));
            closeables.add(client);
            client.start();

            ServiceInstance<String>     instance = ServiceInstance.<String>builder().payload("thing").name("test").port(10064).build();
            ServiceDiscovery<String>    discovery = new ServiceDiscoveryImpl<String>(client, "/test", new JsonInstanceSerializer<String>(String.class), instance);
            closeables.add(discovery);
            discovery.start();

            Assert.assertEquals(discovery.queryForInstances("test").size(), 1);
           
            KillSession.kill(client.getZookeeperClient().getZooKeeper(), server.getConnectString());
            Thread.sleep(timing.multiple(1.5).session());

            Assert.assertEquals(discovery.queryForInstances("test").size(), 1);
        }
        finally
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    {
        final String        SERVICE_ONE = "one";
        final String        SERVICE_TWO = "two";

        List<Closeable>     closeables = Lists.newArrayList();
        TestingServer       server = new TestingServer();
        closeables.add(server);
        try
        {
            CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
            closeables.add(client);
            client.start();

            ServiceInstance<Void>       s1_i1 = ServiceInstance.<Void>builder().name(SERVICE_ONE).build();
            ServiceInstance<Void>       s1_i2 = ServiceInstance.<Void>builder().name(SERVICE_ONE).build();
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    @Test
    public void         testBasic() throws Exception
    {
        List<Closeable>     closeables = Lists.newArrayList();
        TestingServer       server = new TestingServer();
        closeables.add(server);
        try
        {
            CuratorFramework client = CuratorFrameworkFactory.newClient(server.getConnectString(), new RetryOneTime(1));
            closeables.add(client);
            client.start();
           
            ServiceInstance<String>     instance = ServiceInstance.<String>builder().payload("thing").name("test").port(10064).build();
            ServiceDiscovery<String>    discovery = ServiceDiscoveryBuilder.builder(String.class).basePath("/test").client(client).thisInstance(instance).build();
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{
    private static final String     PATH = "/example/cache";

    public static void main(String[] args) throws Exception
    {
        TestingServer       server = new TestingServer();
        CuratorFramework    client = null;
        PathChildrenCache   cache = null;
        try
        {
            client = CuratorFrameworkFactory.newClient(server.getConnectString(), new ExponentialBackoffRetry(1000, 3));
            client.start();

            // in this example we will cache data. Notice that this is optional.
            cache = new PathChildrenCache(client, PATH, true);
            cache.start();
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        System.out.println("Create " + CLIENT_QTY + " clients, have each negotiate for leadership and then wait a random number of seconds before letting another leader election occur.");
        System.out.println("Notice that leader election is fair: all clients will become leader and will do so the same number of times.");

        List<CuratorFramework>  clients = Lists.newArrayList();
        List<ExampleClient>     examples = Lists.newArrayList();
        TestingServer           server = new TestingServer();
        try
        {
            for ( int i = 0; i < CLIENT_QTY; ++i )
            {
                CuratorFramework    client = CuratorFrameworkFactory.newClient(server.getConnectString(), new ExponentialBackoffRetry(1000, 3));
                clients.add(client);

                ExampleClient       example = new ExampleClient(client, PATH, "Client #" + i);
                examples.add(example);
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            }
            Assert.assertTrue(timing.acquireSemaphore(semaphore));

            timing.sleepABit();

            server = new TestingServer(server.getPort(), server.getTempDirectory());
            Assert.assertTrue(timing.awaitLatch(latch));

            timing.sleepABit();

            Assert.assertNull(client.checkExists().forPath("/test-me"));
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            }
            Assert.assertTrue(timing.acquireSemaphore(semaphore));

            timing.sleepABit();

            server = new TestingServer(server.getPort(), server.getTempDirectory());
            Assert.assertTrue(timing.awaitLatch(latch));

            timing.sleepABit();

            Assert.assertNull(client.checkExists().forPath("/test-me"));
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