Examples of ZkConnection

com.linkedin.d2.discovery.stores.zk.ZKConnection
Very very lightweight holder for a ZK connection which allows monitoring of the connection state. It uses the default watcher for connection state monitoring. Do NOT set a different default watcher on this connection. Use of the async methods that set a watch to be delivered to the default watcher is discouraged, as such watches will be ignored when triggered. @author Steven Ihde @version $Revision: $
org.I0Itec.zkclient.ZkConnection

Examples of org.I0Itec.zkclient.ZkConnection

        System.out.println("In Old connection New session");
      }
    };


    _zkClient.subscribeStateChanges(listener);
    ZkConnection connection = ((ZkConnection) _zkClient.getConnection());
    ZooKeeper zookeeper = connection.getZookeeper();
    System.out.println("old sessionId= " + zookeeper.getSessionId());
    Watcher watcher = new Watcher() {
      @Override
      public void process(WatchedEvent event) {
        System.out.println("In New connection In process event:" + event);
      }
    };
    ZooKeeper newZookeeper =
        new ZooKeeper(connection.getServers(), zookeeper.getSessionTimeout(), watcher,
            zookeeper.getSessionId(), zookeeper.getSessionPasswd());
    Thread.sleep(3000);
    System.out.println("New sessionId= " + newZookeeper.getSessionId());
    Thread.sleep(3000);
    newZookeeper.close();
    Thread.sleep(10000);
    connection = ((ZkConnection) _zkClient.getConnection());
    zookeeper = connection.getZookeeper();
    System.out.println("After session expiry sessionId= " + zookeeper.getSessionId());
  }

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Examples of org.I0Itec.zkclient.ZkConnection

      @Override
      public void handleNewSession() throws Exception {
        // make sure zkclient is connected again
        zkClient.waitUntilConnected();


        ZkConnection connection = ((ZkConnection) zkClient.getConnection());
        ZooKeeper curZookeeper = connection.getZookeeper();


        LOG.info("handleNewSession. sessionId: " + Long.toHexString(curZookeeper.getSessionId()));
      }
    };


    zkClient.subscribeStateChanges(listener);
    ZkConnection connection = ((ZkConnection) zkClient.getConnection());
    ZooKeeper curZookeeper = connection.getZookeeper();
    LOG.info("Before expiry. sessionId: " + Long.toHexString(curZookeeper.getSessionId()));


    Watcher watcher = new Watcher() {
      @Override
      public void process(WatchedEvent event) {
        LOG.info("Process watchEvent: " + event);
      }
    };


    final ZooKeeper dupZookeeper =
        new ZooKeeper(connection.getServers(), curZookeeper.getSessionTimeout(), watcher,
            curZookeeper.getSessionId(), curZookeeper.getSessionPasswd());
    // wait until connected, then close
    while (dupZookeeper.getState() != States.CONNECTED) {
      Thread.sleep(10);
    }
    dupZookeeper.close();


    connection = (ZkConnection) zkClient.getConnection();
    curZookeeper = connection.getZookeeper();
    zkClient.unsubscribeStateChanges(listener);


    // System.err.println("zk: " + oldZookeeper);
    LOG.info("After expiry. sessionId: " + Long.toHexString(curZookeeper.getSessionId()));
  }

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Examples of org.I0Itec.zkclient.ZkConnection

   * Get zk connection session id
   * @param client
   * @return
   */
  public static String getSessionId(ZkClient client) {
    ZkConnection connection = ((ZkConnection) client.getConnection());
    ZooKeeper curZookeeper = connection.getZookeeper();
    return Long.toHexString(curZookeeper.getSessionId());
  }

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Examples of org.I0Itec.zkclient.ZkConnection

      @Override
      public void handleNewSession() throws Exception {
        // make sure zkclient is connected again
        zkClient.waitUntilConnected();


        ZkConnection connection = ((ZkConnection) zkClient.getConnection());
        ZooKeeper curZookeeper = connection.getZookeeper();


        LOG.info("handleNewSession. sessionId: " + Long.toHexString(curZookeeper.getSessionId()));
        waitNewSession.countDown();
      }
    };


    zkClient.subscribeStateChanges(listener);


    ZkConnection connection = ((ZkConnection) zkClient.getConnection());
    ZooKeeper curZookeeper = connection.getZookeeper();
    String oldSessionId = Long.toHexString(curZookeeper.getSessionId());
    LOG.info("Before session expiry. sessionId: " + oldSessionId + ", zk: " + curZookeeper);


    Watcher watcher = new Watcher() {
      @Override
      public void process(WatchedEvent event) {
        LOG.info("Watcher#process, event: " + event);
      }
    };


    final ZooKeeper dupZookeeper =
        new ZooKeeper(connection.getServers(), curZookeeper.getSessionTimeout(), watcher,
            curZookeeper.getSessionId(), curZookeeper.getSessionPasswd());
    // wait until connected, then close
    while (dupZookeeper.getState() != States.CONNECTED) {
      Thread.sleep(10);
    }
    Assert.assertEquals(dupZookeeper.getState(), States.CONNECTED,
        "Fail to connect to zk using current session info");
    dupZookeeper.close();


    // make sure session expiry really happens
    waitNewSession.await();
    zkClient.unsubscribeStateChanges(listener);


    connection = (ZkConnection) zkClient.getConnection();
    curZookeeper = connection.getZookeeper();


    String newSessionId = Long.toHexString(curZookeeper.getSessionId());
    LOG.info("After session expiry. sessionId: " + newSessionId + ", zk: " + curZookeeper);
    Assert.assertNotSame(newSessionId, oldSessionId, "Fail to expire current session, zk: "
        + curZookeeper);

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Examples of org.I0Itec.zkclient.ZkConnection

   * expire zk session asynchronously
   * @param zkClient
   * @throws Exception
   */
  public static void asyncExpireSession(final ZkClient zkClient) throws Exception {
    ZkConnection connection = ((ZkConnection) zkClient.getConnection());
    ZooKeeper curZookeeper = connection.getZookeeper();
    LOG.info("Before expiry. sessionId: " + Long.toHexString(curZookeeper.getSessionId()));


    Watcher watcher = new Watcher() {
      @Override
      public void process(WatchedEvent event) {
        LOG.info("Process watchEvent: " + event);
      }
    };


    final ZooKeeper dupZookeeper =
        new ZooKeeper(connection.getServers(), curZookeeper.getSessionTimeout(), watcher,
            curZookeeper.getSessionId(), curZookeeper.getSessionPasswd());
    // wait until connected, then close
    while (dupZookeeper.getState() != States.CONNECTED) {
      Thread.sleep(10);
    }
    dupZookeeper.close();


    connection = (ZkConnection) zkClient.getConnection();
    curZookeeper = connection.getZookeeper();


    // System.err.println("zk: " + oldZookeeper);
    LOG.info("After expiry. sessionId: " + Long.toHexString(curZookeeper.getSessionId()));
  }

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Examples of org.I0Itec.zkclient.ZkConnection

    }
  }


  public static Map<String, List<String>> getZkWatch(ZkClient client) throws Exception {
    Map<String, List<String>> lists = new HashMap<String, List<String>>();
    ZkConnection connection = ((ZkConnection) client.getConnection());
    ZooKeeper zk = connection.getZookeeper();


    java.lang.reflect.Field field = getField(zk.getClass(), "watchManager");
    field.setAccessible(true);
    Object watchManager = field.get(zk);

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Examples of org.I0Itec.zkclient.ZkConnection


  @Override
  public synchronized void handleStateChanged(KeeperState state) throws Exception {
    switch (state) {
    case SyncConnected:
      ZkConnection zkConnection = (ZkConnection) _zkclient.getConnection();
      LOG.info("KeeperState: " + state + ", zookeeper:" + zkConnection.getZookeeper());
      break;
    case Disconnected:
      LOG.info("KeeperState:" + state + ", disconnectedSessionId: " + _sessionId);


      /**

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Examples of org.I0Itec.zkclient.ZkConnection

        LOG.error("fail to connect zkserver: " + _zkAddr + " in "
            + ZkClient.DEFAULT_CONNECTION_TIMEOUT + "ms. expiredSessionId: " + _sessionId);
        continue;
      }


      ZkConnection zkConnection = ((ZkConnection) _zkclient.getConnection());
      _sessionId = SessionId.from(Long.toHexString(zkConnection.getZookeeper().getSessionId()));


      /**
       * at the time we read session-id, zkconnection might be lost again
       * wait until we get a non-zero session-id
       */

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Examples of org.I0Itec.zkclient.ZkConnection


  @SuppressWarnings("unchecked")
  private Map<String, Set<Watcher>> getExistsWatches(Client client) {
    InteractionProtocol protocol = (InteractionProtocol) ClassUtil.getPrivateFieldValue(client, "_protocol");
    ZkClient zkClient = protocol.getZkClient();
    ZkConnection zkConnection = (ZkConnection) ClassUtil.getPrivateFieldValue(zkClient, "_connection");
    ZooKeeper zookeeper = zkConnection.getZookeeper();
    Object watchManager = ClassUtil.getPrivateFieldValue(zookeeper, "watchManager");
    Map<String, Set<Watcher>> existWatches = (Map<String, Set<Watcher>>) ClassUtil.getPrivateFieldValue(watchManager,
            "existWatches");
    return existWatches;
  }

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Examples of org.I0Itec.zkclient.ZkConnection

      public void handleNewSession() throws Exception {
        LOG.info("In Old connection, new session");
      }
    };
    zkClient.subscribeStateChanges(listener);
    ZkConnection connection = ((ZkConnection) zkClient.getConnection());
    ZooKeeper oldZookeeper = connection.getZookeeper();
    LOG.info("Old sessionId = " + oldZookeeper.getSessionId());


    Watcher watcher = new Watcher() {
      @Override
      public void process(WatchedEvent event) {
        LOG.info("In New connection, process event:" + event);
      }
    };


    ZooKeeper newZookeeper =
        new ZooKeeper(connection.getServers(), oldZookeeper.getSessionTimeout(), watcher,
            oldZookeeper.getSessionId(), oldZookeeper.getSessionPasswd());
    LOG.info("New sessionId = " + newZookeeper.getSessionId());
    // Thread.sleep(3000);
    newZookeeper.close();
    Thread.sleep(10000);
    connection = (ZkConnection) zkClient.getConnection();
    oldZookeeper = connection.getZookeeper();
    LOG.info("After session expiry sessionId = " + oldZookeeper.getSessionId());
  }

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