Examples of org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher

Package org.apache.hadoop.hbase.zookeeper

Examples of org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher

org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher
Acts as the single ZooKeeper Watcher. One instance of this is instantiated for each Master, RegionServer, and client process.
This is the only class that implements {@link Watcher}. Other internal classes which need to be notified of ZooKeeper events must register with the local instance of this watcher via {@link #registerListener}.
This class also holds and manages the connection to ZooKeeper. Code to deal with connection related events and exceptions are handled here.

   * @param TEST_UTIL
   */
  public static ZooKeeperWatcher getZooKeeperWatcher(
      HBaseTestingUtility TEST_UTIL) throws ZooKeeperConnectionException,
      IOException {
    ZooKeeperWatcher zkw = new ZooKeeperWatcher(TEST_UTIL.getConfiguration(),
        "unittest", new Abortable() {
          boolean aborted = false;


          @Override
          public void abort(String why, Throwable e) {

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   */
  public static ZooKeeperWatcher createAndForceNodeToOpenedState(
      HBaseTestingUtility TEST_UTIL, HRegion region,
      ServerName serverName) throws ZooKeeperConnectionException,
      IOException, KeeperException, NodeExistsException {
    ZooKeeperWatcher zkw = getZooKeeperWatcher(TEST_UTIL);
    ZKAssign.createNodeOffline(zkw, region.getRegionInfo(), serverName);
    int version = ZKAssign.transitionNodeOpening(zkw, region
        .getRegionInfo(), serverName);
    ZKAssign.transitionNodeOpened(zkw, region.getRegionInfo(), serverName,
        version);

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    // If abort is called, be sure to fail the test (don't just swallow it
    // silently as is mockito default).
    this.server = Mockito.mock(Server.class);
    Mockito.when(server.getConfiguration()).thenReturn(HTU.getConfiguration());
    this.watcher =
      new ZooKeeperWatcher(HTU.getConfiguration(), "mockedServer", this.server, true);
    Mockito.when(server.getZooKeeper()).thenReturn(this.watcher);
    Mockito.doThrow(new RuntimeException("Aborted")).
      when(server).abort(Mockito.anyString(), (Throwable)Mockito.anyObject());


    // Mock a ServerManager.  Say server SERVERNAME_{A,B} are online.  Also

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      throws IOException, KeeperException, InterruptedException, ServiceException {
    final RecoverableZooKeeper recoverableZk = Mockito
        .mock(RecoverableZooKeeper.class);
    AssignmentManagerWithExtrasForTesting am = setUpMockedAssignmentManager(
        this.server, this.serverManager);
    Watcher zkw = new ZooKeeperWatcher(HBaseConfiguration.create(), "unittest",
        null) {
      public RecoverableZooKeeper getRecoverableZooKeeper() {
        return recoverableZk;
      }
    };

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      LOG.info("Starting testRegionShouldNotBeDeployed.");
      MiniHBaseCluster cluster = TEST_UTIL.getHBaseCluster();
      assertTrue(cluster.waitForActiveAndReadyMaster());


      // Create a ZKW to use in the test
      ZooKeeperWatcher zkw = HBaseTestingUtility.getZooKeeperWatcher(TEST_UTIL);


      FileSystem filesystem = FileSystem.get(conf);
      Path rootdir = filesystem.makeQualified(new Path(conf
          .get(HConstants.HBASE_DIR)));

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    HRegionServer regionServer = cluster.getRegionServer(count);


    TEST_UTIL.shutdownMiniHBaseCluster();


    // Create a ZKW to use in the test
    ZooKeeperWatcher zkw = 
      HBaseTestingUtility.createAndForceNodeToOpenedState(TEST_UTIL, 
          metaRegion, regionServer.getServerName());


    LOG.info("Staring cluster for second time");
    TEST_UTIL.startMiniHBaseCluster(NUM_MASTERS, NUM_RS);


    // Failover should be completed, now wait for no RIT
    log("Waiting for no more RIT");
    ZKAssign.blockUntilNoRIT(zkw);


    zkw.close();
    // Stop the cluster
    TEST_UTIL.shutdownMiniCluster();
  }

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    TEST_UTIL.startMiniCluster(NUM_MASTERS, NUM_RS);
    MiniHBaseCluster cluster = TEST_UTIL.getHBaseCluster();
    log("Cluster started");


    // Create a ZKW to use in the test
    ZooKeeperWatcher zkw = HBaseTestingUtility.getZooKeeperWatcher(TEST_UTIL);


    // get all the master threads
    List<MasterThread> masterThreads = cluster.getMasterThreads();
    assertEquals(1, masterThreads.size());

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    TEST_UTIL.startMiniCluster(NUM_MASTERS, NUM_RS);
    MiniHBaseCluster cluster = TEST_UTIL.getHBaseCluster();
    log("Cluster started");


    // Create a ZKW to use in the test
    ZooKeeperWatcher zkw = new ZooKeeperWatcher(TEST_UTIL.getConfiguration(),
        "unittest", new Abortable() {


          @Override
          public void abort(String why, Throwable e) {
            LOG.error("Fatal ZK Error: " + why, e);

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      @Override
      public boolean isAborted()  {
        return false;
      }
    };
    this.watcher = new ZooKeeperWatcher(UTIL.getConfiguration(),
      this.getClass().getSimpleName(), this.abortable, true);
  }

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  }


  /* ---- MasterObserver implementation ---- */
  public void start(CoprocessorEnvironment env) throws IOException {


    ZooKeeperWatcher zk = null;
    if (env instanceof MasterCoprocessorEnvironment) {
      // if running on HMaster
      MasterCoprocessorEnvironment mEnv = (MasterCoprocessorEnvironment) env;
      zk = mEnv.getMasterServices().getZooKeeper();      
    } else if (env instanceof RegionServerCoprocessorEnvironment) {

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