Examples of com.alibaba.wasp.zookeeper.ClusterStatusTracker

com.alibaba.wasp.zookeeper.ClusterStatusTracker
Tracker on cluster settings up in zookeeper. This is not related to {@link com.alibaba.wasp.ClusterStatus}. That class is a data structure that holds snapshot of current view on cluster. This class is about tracking cluster attributes up in zookeeper.

    stallIfBackupMaster(this.conf, this.activeMasterManager);


    // The ClusterStatusTracker is setup before the other
    // ZKBasedSystemTrackers because it's needed by the activeMasterManager
    // to check if the cluster should be shutdown.
    this.clusterStatusTracker = new ClusterStatusTracker(getZooKeeper(), this);
    this.clusterStatusTracker.start();
    return this.activeMasterManager.blockUntilBecomingActiveMaster(
        startupStatus, this.clusterStatusTracker);
  }

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    // Create the master node with a dummy address
    ServerName master = new ServerName("localhost", 1,
        System.currentTimeMillis());
    // Should not have a master yet
    DummyMaster dummyMaster = new DummyMaster(zk, master);
    ClusterStatusTracker clusterStatusTracker = dummyMaster
        .getClusterStatusTracker();
    ActiveMasterManager activeMasterManager = dummyMaster
        .getActiveMasterManager();
    assertFalse(activeMasterManager.clusterHasActiveMaster.get());


    // First test becoming the active master uninterrupted
    MonitoredTask status = Mockito.mock(MonitoredTask.class);
    clusterStatusTracker.setClusterUp();


    activeMasterManager.blockUntilBecomingActiveMaster(status,
        clusterStatusTracker);
    assertTrue(activeMasterManager.clusterHasActiveMaster.get());
    assertMaster(zk, master);

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    DummyMaster ms1 = new DummyMaster(zk, firstMasterAddress);
    ActiveMasterManager activeMasterManager = ms1.getActiveMasterManager();
    assertFalse(activeMasterManager.clusterHasActiveMaster.get());


    // First test becoming the active master uninterrupted
    ClusterStatusTracker clusterStatusTracker = ms1.getClusterStatusTracker();
    clusterStatusTracker.setClusterUp();
    activeMasterManager.blockUntilBecomingActiveMaster(
        Mockito.mock(MonitoredTask.class), clusterStatusTracker);
    assertTrue(activeMasterManager.clusterHasActiveMaster.get());
    assertMaster(zk, firstMasterAddress);

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    private volatile boolean stopped;
    private ClusterStatusTracker clusterStatusTracker;
    private ActiveMasterManager activeMasterManager;


    public DummyMaster(ZooKeeperWatcher zk, ServerName master) {
      this.clusterStatusTracker = new ClusterStatusTracker(zk, this);
      clusterStatusTracker.start();


      this.activeMasterManager = new ActiveMasterManager(zk, master, this);
      zk.registerListener(activeMasterManager);
    }

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Related Classes of com.alibaba.wasp.zookeeper.ClusterStatusTracker

com.alibaba.wasp.master.FMaster

com.alibaba.wasp.master.TestActiveMasterManager

com.alibaba.wasp.master.TestActiveMasterManager$DummyMaster

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