Package org.apache.helix.model

Examples of org.apache.helix.model.ExternalView

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    boolean result =
        ClusterStateVerifier.verifyByZkCallback(new BestPossAndExtViewZkVerifier(ZK_ADDR,
            CLUSTER_NAME));
    Assert.assertTrue(result);
    Builder kb = _participants[1].getHelixDataAccessor().keyBuilder();
    ExternalView externalView =
        _participants[1].getHelixDataAccessor().getProperty(
            kb.externalView("TestDB"));

    for (String partitionName : externalView.getRecord().getMapFields().keySet()) {
      for (String hostName : externalView.getRecord().getMapField(partitionName).keySet()) {
        if (hostName.equals(participant1)) {
          Assert.assertTrue(externalView.getRecord().getMapField(partitionName).get(hostName)
              .equalsIgnoreCase("OFFLINE"));
        }
      }
    }
    Assert.assertTrue(externalView.getRecord().getMapField("TestDB_14").get(participant2)
        .equalsIgnoreCase("OFFLINE"));
  }
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    Assert.assertTrue(result);

    // make sure localhost_12919 is master on TestDB_1
    HelixDataAccessor accessor = controller.getHelixDataAccessor();
    Builder keyBuilder = accessor.keyBuilder();
    ExternalView extView = accessor.getProperty(keyBuilder.externalView(db));
    Map<String, String> stateMap = extView.getStateMap(db + "_1");
    Assert
        .assertEquals(
            stateMap.get("localhost_12919"),
            "MASTER",
            "localhost_12919 should be MASTER even though replicas is set to 2, since we generate message based on target-state priority");
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    // String controllerName = CONTROLLER_PREFIX + "_0";

    HelixManager manager = _controller; // _startCMResultMap.get(controllerName)._manager;
    HelixDataAccessor accessor = manager.getHelixDataAccessor();
    Builder kb = accessor.keyBuilder();
    ExternalView ev = accessor.getProperty(kb.externalView(TEST_DB));
    Map<String, LiveInstance> liveinstanceMap =
        accessor.getChildValuesMap(accessor.keyBuilder().liveInstances());

    for (String instanceName : liveinstanceMap.keySet()) {
      String sessionid = liveinstanceMap.get(instanceName).getSessionId();
      for (String partition : ev.getPartitionSet()) {
        if (ev.getStateMap(partition).containsKey(instanceName)) {
          String uuid = UUID.randomUUID().toString();
          Message message = new Message(MessageType.STATE_TRANSITION, uuid);
          boolean rand = new Random().nextInt(10) > 5;
          if (ev.getStateMap(partition).get(instanceName).equals("MASTER")) {
            message.setSrcName(manager.getInstanceName());
            message.setTgtName(instanceName);
            message.setMsgState(MessageState.NEW);
            message.setPartitionName(partition);
            message.setResourceName(TEST_DB);
            message.setFromState(rand ? "SLAVE" : "OFFLINE");
            message.setToState(rand ? "MASTER" : "SLAVE");
            message.setTgtSessionId(sessionid);
            message.setSrcSessionId(manager.getSessionId());
            message.setStateModelDef("MasterSlave");
            message.setStateModelFactoryName("DEFAULT");
          } else if (ev.getStateMap(partition).get(instanceName).equals("SLAVE")) {
            message.setSrcName(manager.getInstanceName());
            message.setTgtName(instanceName);
            message.setMsgState(MessageState.NEW);
            message.setPartitionName(partition);
            message.setResourceName(TEST_DB);
            message.setFromState(rand ? "MASTER" : "OFFLINE");
            message.setToState(rand ? "SLAVE" : "SLAVE");
            message.setTgtSessionId(sessionid);
            message.setSrcSessionId(manager.getSessionId());
            message.setStateModelDef("MasterSlave");
            message.setStateModelFactoryName("DEFAULT");
          }
          accessor.setProperty(accessor.keyBuilder().message(instanceName, message.getMsgId()),
              message);
        }
      }
    }
    Thread.sleep(3000);
    ExternalView ev2 = accessor.getProperty(kb.externalView(TEST_DB));
    Assert.assertTrue(ev.equals(ev2));
  }
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        ClusterStateVerifier
            .verifyByZkCallback((new ClusterStateVerifier.BestPossAndExtViewZkVerifier(ZK_ADDR,
                CLUSTER_NAME)));
    Assert.assertTrue(result, "Cluster verification fails");

    ExternalView ev = accessor.getProperty(accessor.keyBuilder().externalView(DB2));
    Set<String> hosts = new HashSet<String>();
    for (String p : ev.getPartitionSet()) {
      for (String hostName : ev.getStateMap(p).keySet()) {
        InstanceConfig config =
            accessor.getProperty(accessor.keyBuilder().instanceConfig(hostName));
        Assert.assertTrue(config.containsTag(DB2tag));
        hosts.add(hostName);
      }
    }
    Assert.assertEquals(hosts.size(), 2);

    String DB3 = "TestDB3";
    String DB3Tag = "TestDB3_tag";
    partitions = 10;
    replica = 3;
    for (int i = 1; i < 5; i++) {
      String instanceName = "localhost_" + (12918 + i);
      _setupTool.getClusterManagementTool().addInstanceTag(CLUSTER_NAME, instanceName, DB3Tag);
    }
    _setupTool.addResourceToCluster(CLUSTER_NAME, DB3, partitions, STATE_MODEL);
    _setupTool.rebalanceStorageCluster(CLUSTER_NAME, DB3, DB3Tag, replica);

    result =
        ClusterStateVerifier
            .verifyByZkCallback((new ClusterStateVerifier.BestPossAndExtViewZkVerifier(ZK_ADDR,
                CLUSTER_NAME)));
    Assert.assertTrue(result, "Cluster verification fails");

    ev = accessor.getProperty(accessor.keyBuilder().externalView(DB3));
    hosts = new HashSet<String>();
    for (String p : ev.getPartitionSet()) {
      for (String hostName : ev.getStateMap(p).keySet()) {
        InstanceConfig config =
            accessor.getProperty(accessor.keyBuilder().instanceConfig(hostName));
        Assert.assertTrue(config.containsTag(DB3Tag));
        hosts.add(hostName);
      }
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        new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor<ZNRecord>(_gZkClient));
    TestHelper.verify(new TestHelper.Verifier() {

      @Override
      public boolean verify() throws Exception {
        ExternalView view = accessor.getProperty(keyBuilder.externalView(resourceName));
        String state = null;

        if (view != null) {
          Map<String, String> map = view.getStateMap(resourceName);
          if (map != null) {
            state = map.get("node2");
          }
        }
        return state != null && state.equals("MASTER");
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      String dbName, long randomSeed) {
    ZKHelixDataAccessor accessor =
        new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor(client));
    Builder keyBuilder = accessor.keyBuilder();

    ExternalView externalView =
        new ExternalView(computeRoutingTable(instanceNames, partitions, replicas, dbName,
            randomSeed));

    accessor.setProperty(keyBuilder.externalView(dbName), externalView);
  }
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      }
    }
  }

  private static void printStatus(HelixAdmin admin, String cluster, String resource) {
    ExternalView externalView = admin.getResourceExternalView(cluster, resource);
    // System.out.println(externalView);
    TreeSet<String> treeSet = new TreeSet<String>(externalView.getPartitionSet());
    System.out.println("lockName" + "\t" + "acquired By");
    System.out.println("======================================");
    for (String lockName : treeSet) {
      Map<String, String> stateMap = externalView.getStateMap(lockName);
      String acquiredBy = null;
      if (stateMap != null) {
        for (String instanceName : stateMap.keySet()) {
          if ("ONLINE".equals(stateMap.get(instanceName))) {
            acquiredBy = instanceName;
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    Thread.sleep(1000);

    // Get the external view
    HelixDataAccessor accessor = controller.getHelixDataAccessor();
    PropertyKey.Builder keyBuilder = accessor.keyBuilder();
    ExternalView externalView =
        accessor.getProperty(keyBuilder.externalView(idealState.getResourceName()));

    // Disable the partitions in an order known to cause problems
    int[] pid = {
        0, 7
    };
    for (int i = 0; i < pid.length; i++) {
      String partitionName = resourceName + '_' + pid[i];
      Map<String, String> stateMap = externalView.getStateMap(partitionName);
      String leader = null;
      for (String participantName : stateMap.keySet()) {
        String state = stateMap.get(participantName);
        if (state.equals("LEADER")) {
          leader = participantName;
        }
      }
      List<String> partitionNames = Lists.newArrayList(partitionName);
      admin.enablePartition(false, clusterName, leader, idealState.getResourceName(),
          partitionNames);

      Thread.sleep(1000);
    }

    // Ensure that nothing was reassigned and the disabled are offline
    externalView = accessor.getProperty(keyBuilder.externalView(idealState.getResourceName()));
    Map<String, String> p0StateMap = externalView.getStateMap(resourceName + "_0");
    Assert.assertEquals(p0StateMap.size(), 1);
    String p0Participant = p0StateMap.keySet().iterator().next();
    Assert.assertEquals(p0StateMap.get(p0Participant), "OFFLINE");
    Map<String, String> p7StateMap = externalView.getStateMap(resourceName + "_7");
    Assert.assertEquals(p7StateMap.size(), 1);
    String p7Participant = p7StateMap.keySet().iterator().next();
    Assert.assertEquals(p7StateMap.get(p7Participant), "OFFLINE");

    // Cleanup
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    // make sure schemata external view is empty
    ZkBaseDataAccessor<ZNRecord> baseAccessor = new ZkBaseDataAccessor<ZNRecord>(_gZkClient);
    ZKHelixDataAccessor accessor = new ZKHelixDataAccessor(clusterName, baseAccessor);
    Builder keyBuilder = accessor.keyBuilder();
    ExternalView extView = accessor.getProperty(keyBuilder.externalView("schemata"));
    Assert.assertEquals(extView.getPartitionSet().size(), 0,
        "schemata externalView should be empty but was \"" + extView + "\"");

    // clean up
    controller.syncStop();
    for (int i = 0; i < n; i++) {
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    testListener.Reset();
    HelixDataAccessor accessor = testHelixManager.getHelixDataAccessor();
    Builder keyBuilder = accessor.keyBuilder();

    ExternalView extView = new ExternalView("db-12345");
    accessor.setProperty(keyBuilder.externalView("db-12345"), extView);
    Thread.sleep(100);
    AssertJUnit.assertTrue(testListener.externalViewChangeReceived);
    testListener.Reset();
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