Example usage for org.apache.zookeeper Watcher Watcher

Introduction

In this page you can find the example usage for org.apache.zookeeper Watcher Watcher.

Prototype

Watcher

Source Link

Usage

From source file:herddb.cluster.ZookeeperMetadataStorageManager.java

License:Apache License

private synchronized void restartZooKeeper() throws IOException, InterruptedException {
    ZooKeeper old = zooKeeper;/*from w ww.  j  av a2s  . c  om*/
    if (old != null) {
        old.close();
    }
    CountDownLatch firstConnectionLatch = new CountDownLatch(1);

    ZooKeeper zk = new ZooKeeper(zkAddress, zkSessionTimeout, new Watcher() {
        @Override
        public void process(WatchedEvent event) {
            switch (event.getState()) {
            case SyncConnected:
            case SaslAuthenticated:
                firstConnectionLatch.countDown();
                notifyMetadataChanged();
                break;
            default:
                // ignore
                break;
            }
        }
    });
    if (!firstConnectionLatch.await(zkSessionTimeout, TimeUnit.SECONDS)) {
        zk.close();
        throw new IOException(
                "Could not connect to zookeeper at " + zkAddress + " within " + zkSessionTimeout + " ms");
    }
    this.zooKeeper = zk;
    LOGGER.info("Connected to ZK " + zk);
}

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From source file:herddb.cluster.ZookeeperMetadataStorageManagerTest.java

License:Apache License

private void expireZkSession(long sessionId, byte[] passwd) throws InterruptedException, IOException {
    CountDownLatch waitConnection = new CountDownLatch(1);
    try (ZooKeeper zooKeeper = new ZooKeeper(testEnv.getAddress(), testEnv.getTimeout(), new Watcher() {
        @Override/* w  w  w  .  j  a v a 2  s  . c  om*/
        public void process(WatchedEvent event) {
            switch (event.getState()) {
            case SyncConnected:
                waitConnection.countDown();
                break;
            }
        }
    }, sessionId, passwd)) {
        assertTrue(waitConnection.await(1, TimeUnit.MINUTES));
    }
}

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From source file:hws.util.ZkDataMonitor.java

License:Apache License

public ZkClient(String serverAddr, int sessionTimeout) throws IOException, InterruptedException {
    final CountDownLatch connectedSignal = new CountDownLatch(1);
    this.zk = new ZooKeeper(serverAddr, sessionTimeout, new Watcher() {
        @Override//from   w w  w .j  a  v a  2 s . co m
        public void process(WatchedEvent event) {
            if (event.getState() == Watcher.Event.KeeperState.SyncConnected) {
                connectedSignal.countDown();
            }
        }
    });
    connectedSignal.await();
}

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From source file:io.fabric8.itests.basic.git.GitUtils.java

License:Apache License

/**
 * Wait until the version znode gets updated (indicating that entries has been bridge from/to git).
 * @param curator       The {@link CuratorFramework} instance to use for looking up the registry.
 * @param branch        The name of the branch/version.
 * @throws Exception/*from   www  . j a va  2 s.co  m*/
 */
public static void waitForBranchUpdate(CuratorFramework curator, String branch) throws Exception {
    final CountDownLatch latch = new CountDownLatch(1);
    final Watcher watcher = new Watcher() {
        @Override
        public void process(WatchedEvent watchedEvent) {
            latch.countDown();
        }
    };

    for (int i = 0; curator.checkExists().usingWatcher(watcher)
            .forPath(ZkPath.CONFIG_VERSION.getPath(branch)) == null && i < 3; i++) {
        Thread.sleep(1000);
    }

    latch.await(10, TimeUnit.SECONDS);
}

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From source file:io.flood.registry.zk.ZookeeperRegistry.java

License:Apache License

@Override
public void subscribe(final String name, final String group, final NotifyListener listener) {
    try {/*w w  w  . java2 s. co m*/
        String serviceDir = Paths.get(name, group);
        client.getChildren().usingWatcher(new Watcher() {
            @Override
            public void process(WatchedEvent watchedEvent) {
                switch (watchedEvent.getType()) {
                case NodeChildrenChanged: {

                    try {
                        final List<String> nodes = client.getChildren().forPath(serviceDir);
                        List<Resource> services = Lists.newArrayListWithCapacity(nodes.size());
                        String servicePath = null;
                        for (String node : nodes) {
                            servicePath = Paths.get(name, group, node);
                            byte[] buffer = client.getData().forPath(servicePath);
                            Resource resource = GsonFactory.fromJson(buffer, Resource.class);
                            if (!localService.containsKey(servicePath)) {
                                LOG.info("new serice {},{}", servicePath, resource);
                                listener.notifyResourceCreated(resource);
                                subscribeRealService(resource, listener);
                                localService.put(servicePath, resource);
                            }
                        }

                        Maps.filterEntries(localService, entry -> {
                            if (nodes.contains(entry.getKey())) {
                                return true;
                            }
                            listener.notifyResourceDeleted(entry.getValue());
                            return false;
                        });
                    } catch (Exception e) {
                        LOG.warn("node child changed ,but process error ", e);
                    }

                }
                }
            }
        }).forPath(Paths.get(name, group));
        LOG.info("subscribe {}", Paths.get(name, group));
    } catch (Exception e) {
        throw new IllegalStateException(e);
    }
}

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From source file:io.pivotal.cf.servicebroker.Util.java

License:Open Source License

ZooKeeper getZooKeeper() throws IOException {
    return new ZooKeeper(env.getProperty("ZOOKEEPER_HOST"),
            Integer.parseInt(env.getProperty("ZOOKEEPER_TIMEOUT")), new Watcher() {
                @Override/*from  www . ja v  a 2 s .  c om*/
                public void process(WatchedEvent event) {
                    log.info("watching: " + event.toString());
                }
            });
}

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From source file:io.s4.comm.test.TestTaskSetupApp.java

License:Open Source License

public void testTaskSetup1() throws Exception {
    String address = "effortfell.greatamerica.corp.yahoo.com:2181";
    Watcher watcher = new Watcher() {

        @Override//from   www.  ja v a 2 s.com
        public void process(WatchedEvent event) {

        }

    };
    // setup
    ZooKeeper zk = new ZooKeeper(address, 30000, watcher);
    String root = "/tasksetup_app_test";
    ZkTaskSetup zkSetup = new ZkTaskSetup(address, root, ClusterType.S4);
    Map<String, String> task1 = new HashMap<String, String>();
    task1.put("name", "task-1");

    Map<String, String> task2 = new HashMap<String, String>();
    task2.put("name", "task-2");
    String tasksListRoot = root + "/tasks";
    zkSetup.cleanUp();
    Stat exists = zk.exists(tasksListRoot, false);
    myassert(exists == null);
    Object[] data = new Object[] { task1, task2 };
    zkSetup.setUpTasks(data);

    // verify that tasks are created
    exists = zk.exists(tasksListRoot, false);
    myassert(exists != null);
    List<String> children = zk.getChildren(tasksListRoot, false);
    myassert(children.size() == data.length);
    boolean[] matched = new boolean[data.length];
    for (String child : children) {
        System.out.println(child);
        String childPath = tasksListRoot + "/" + child;
        Stat sTemp = zk.exists(childPath, false);
        byte[] tempData = zk.getData(tasksListRoot + "/" + child, false, sTemp);
        Map<String, Object> map = (Map<String, Object>) JSONUtil.getMapFromJson(new String(tempData));
        // check if it matches any of the data
        for (int i = 0; i < data.length; i++) {
            Map<String, Object> newData = (Map<String, Object>) data[i];
            if (!matched[i] && CommUtil.compareMaps(newData, map)) {
                matched[i] = true;
                break;
            }
        }
    }
    for (int i = 0; i < matched.length; i++) {
        myassert(matched[i]);
    }

    // try running again and make verify new node is not created
    Stat oldStat = zk.exists(tasksListRoot, false);
    System.out.println("oldStat=" + oldStat);
    zkSetup.setUpTasks(data);
    Stat newStat = zk.exists(tasksListRoot, false);
    System.out.println("newstat=" + newStat);
    myassert(oldStat.getMtime() == newStat.getMtime());

    // make change to task config and try running again and verify new
    // config is uploaded
    oldStat = zk.exists(tasksListRoot, false);
    System.out.println("oldStat=" + oldStat.getVersion());
    ((Map<String, String>) data[data.length - 1]).put("name", "changedname");
    zkSetup.setUpTasks(data);
    newStat = zk.exists(tasksListRoot, false);
    System.out.println("newstat=" + newStat.getVersion());
    System.out.println();
    myassert(oldStat.getMtime() != newStat.getMtime());

    // ensure version change is working
    zkSetup.setUpTasks("1.0.0.0", data);
}

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From source file:io.s4.zeno.config.ZKConfigTest.java

License:Open Source License

/**
 * The main method.//from   w  w w .j a v  a 2  s .  c o m
 * 
 * @param arg
 *            the arguments
 * @throws IOException
 *             Signals that an I/O exception has occurred.
 */
public static void main(String[] arg) throws IOException {
    PropertyConfigurator.configure("log4j.properties");

    String connect = "localhost:2181";
    int timeout = 1000;
    ZooKeeper zk = new ZooKeeper(connect, timeout, new Watcher() {
        public void process(WatchedEvent e) {
            System.out.println("Got Notification: " + e);
        }
    });

    ZooKeeperHelper zookeeper = new ZooKeeperHelper(zk, 3, 5000);

    ZKWritableConfigMap conf = new ZKWritableConfigMap(zookeeper, "/tmp/test-config");

    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

    String cmd;
    while ((cmd = in.readLine()) != null) {
        if (cmd.equals("get")) {
            String key = in.readLine();
            System.out.println("got '" + key + "': " + conf.get(key));
        } else {
            String key = in.readLine();
            String val = in.readLine();
            conf.set(key, val);
        }
    }
}

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From source file:io.s4.zeno.console.Main.java

License:Open Source License

public static void main(String[] argv) throws IOException, KeeperException {
    PropertyConfigurator.configure("log4j.properties");

    String zkserver = argv[0];// w  w w.j a  va  2 s .  c  om
    String base = argv[1];

    logger.info("connecting to zookeeper: " + zkserver);

    int timeout = 1000;
    ZooKeeper zookeeper = new ZooKeeper(zkserver, timeout, new Watcher() {
        public void process(WatchedEvent e) {
            logger.info("Got Notification: " + e);
        }
    });

    logger.info("connected to zookeeper");

    Main cli = new Main(zookeeper, base);
    cli.run();
}

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From source file:io.s4.zeno.route.RouterTest.java

License:Open Source License

/**
 * The main method./*  w  w  w.  j a  va 2  s . co  m*/
 * 
 * @param arg
 *            the arguments
 * @throws IOException
 *             Signals that an I/O exception has occurred.
 */
public static void main(String[] arg) throws IOException {
    PropertyConfigurator.configure("log4j.properties");

    String connect = arg[0];
    int timeout = 1000;
    ZooKeeper zk = new ZooKeeper(connect, timeout, new Watcher() {
        public void process(WatchedEvent e) {
            System.out.println("Got ZK Notification: " + e);
        }
    });

    RouterTest test = new RouterTest(zk, arg[1]);

    test.dump();
    // test.test1();
    test.loadGen(arg[2]);
}

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