Package org.apache.helix.model

Examples of org.apache.helix.model.IdealState

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    String testName = className + "_" + methodName;
    System.out.println("START " + testName + " at "
        + new Date(System.currentTimeMillis()));


    IdealState idealState = new IdealState("idealState");
    idealState.getRecord().setListField("TestDB_0", Arrays.asList("node_1", "node_2"));
    Map<String, String> instanceState = new HashMap<String, String>();
    instanceState.put("node_3", "MASTER");
    instanceState.put("node_4", "SLAVE");
    idealState.getRecord().setMapField("TestDB_1", instanceState);

    // test AUTO mode
    idealState.setIdealStateMode(IdealStateModeProperty.AUTO.toString());
    Set<String> instances = idealState.getInstanceSet("TestDB_0");
//    System.out.println("instances: " + instances);
    Assert.assertEquals(instances.size(), 2, "Should contain node_1 and node_2");
    Assert.assertTrue(instances.contains("node_1"), "Should contain node_1 and node_2");
    Assert.assertTrue(instances.contains("node_2"), "Should contain node_1 and node_2");

    instances = idealState.getInstanceSet("TestDB_nonExist_auto");
    Assert.assertEquals(instances, Collections.emptySet(), "Should get empty set");
   
    // test CUSTOMIZED mode
    idealState.setIdealStateMode(IdealStateModeProperty.CUSTOMIZED.toString());
    instances = idealState.getInstanceSet("TestDB_1");
//    System.out.println("instances: " + instances);
    Assert.assertEquals(instances.size(), 2, "Should contain node_3 and node_4");
    Assert.assertTrue(instances.contains("node_3"), "Should contain node_3 and node_4");
    Assert.assertTrue(instances.contains("node_4"), "Should contain node_3 and node_4");

    instances = idealState.getInstanceSet("TestDB_nonExist_custom");
    Assert.assertEquals(instances, Collections.emptySet(), "Should get empty set");
   
    System.out.println("END " + testName + " at "
        + new Date(System.currentTimeMillis()));
  }
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    if (LOG.isInfoEnabled()) {
      LOG.info("newMapping: " + newMapping);
    }

    IdealState newIdealState = new IdealState(resourceName);
    newIdealState.getRecord().setSimpleFields(currentIdealState.getRecord().getSimpleFields());
    newIdealState.setRebalanceMode(RebalanceMode.FULL_AUTO);
    newIdealState.getRecord().setListFields(newMapping.getListFields());
    return newIdealState;
  }
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      // if externalView is not empty and idealState doesn't exist
      // add empty idealState for the resource
      for (String resource : extViews.keySet()) {
        if (!idealStates.containsKey(resource)) {
          idealStates.put(resource, new IdealState(resource));
        }
      }

      // calculate best possible state
      BestPossibleStateOutput bestPossOutput = ClusterStateVerifier.calcBestPossState(cache);
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  public void verifyReplication(ZkClient zkClient, String clusterName, String resource, int repl) {
    ZKHelixDataAccessor accessor =
        new ZKHelixDataAccessor(clusterName, new ZkBaseDataAccessor(zkClient));
    Builder keyBuilder = accessor.keyBuilder();

    IdealState idealState = accessor.getProperty(keyBuilder.idealStates(resource));
    for (String partitionName : idealState.getPartitionSet()) {
      if (idealState.getRebalanceMode() == RebalanceMode.SEMI_AUTO) {
        AssertJUnit.assertEquals(repl, idealState.getPreferenceList(partitionName).size());
      } else if (idealState.getRebalanceMode() == RebalanceMode.CUSTOMIZED) {
        AssertJUnit.assertEquals(repl, idealState.getInstanceStateMap(partitionName).size());
      }
    }
  }
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    for (int i : nodes) {
      instances.add("localhost_" + i);
    }

    for (String resourceName : resources) {
      IdealState idealState = new IdealState(resourceName);
      for (int p = 0; p < partitions; p++) {
        List<String> value = new ArrayList<String>();
        for (int r = 0; r < replicas; r++) {
          int n = nodes[(p + r) % nodes.length];
          value.add("localhost_" + n);
        }
        idealState.getRecord().setListField(resourceName + "_" + p, value);
      }

      idealState.setReplicas(Integer.toString(replicas));
      idealState.setStateModelDefRef("MasterSlave");
      idealState.setRebalanceMode(RebalanceMode.SEMI_AUTO);
      idealState.setNumPartitions(partitions);
      idealStates.add(idealState);

      // System.out.println(idealState);
      accessor.setProperty(keyBuilder.idealStates(resourceName), idealState);
    }
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    // set ideal state
    String resourceName = "testResource";
    ZNRecord record =
        DefaultIdealStateCalculator.calculateIdealState(instances, partitions, replicas,
            resourceName, "MASTER", "SLAVE");
    IdealState idealState = new IdealState(record);
    idealState.setStateModelDefRef("MasterSlave");

    Builder keyBuilder = accessor.keyBuilder();
    accessor.setProperty(keyBuilder.idealStates(resourceName), idealState);

    // set live instances
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        for (int r = 0; r < replicas; r++) {
          value.add("localhost_" + (p + r + 1) % nodes);
        }
        record.setListField(resourceName + "_" + p, value);
      }
      IdealState idealState = new IdealState(record);
      idealState.setStateModelDefRef("MasterSlave");
      idealState.setIdealStateMode(mode.toString());
      idealState.setNumPartitions(partitions);
      idealStates.add(idealState);

      // System.out.println(idealState);

      Builder keyBuilder = accessor.keyBuilder();
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    int replicas = 1;
    String resourceName = "testResource";
    ZNRecord record =
        DefaultIdealStateCalculator.calculateIdealState(instances, partitions, replicas,
            resourceName, "MASTER", "SLAVE");
    IdealState idealState = new IdealState(record);
    idealState.setStateModelDefRef("MasterSlave");

    HelixDataAccessor accessor = manager.getHelixDataAccessor();
    Builder keyBuilder = accessor.keyBuilder();
    accessor.setProperty(keyBuilder.idealStates(resourceName), idealState);
    ResourceComputationStage stage = new ResourceComputationStage();
    runStage(event, new ReadClusterDataStage());
    runStage(event, stage);

    Map<String, Resource> resource = event.getAttribute(AttributeName.RESOURCES.toString());
    AssertJUnit.assertEquals(1, resource.size());

    AssertJUnit.assertEquals(resource.keySet().iterator().next(), resourceName);
    AssertJUnit.assertEquals(resource.values().iterator().next().getResourceName(), resourceName);
    AssertJUnit.assertEquals(resource.values().iterator().next().getStateModelDefRef(),
        idealState.getStateModelDefRef());
    AssertJUnit
        .assertEquals(resource.values().iterator().next().getPartitions().size(), partitions);
  }
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    Map<String, Resource> resourceMap = event.getAttribute(AttributeName.RESOURCES.toString());
    AssertJUnit.assertEquals(resources.length, resourceMap.size());

    for (int i = 0; i < resources.length; i++) {
      String resourceName = resources[i];
      IdealState idealState = idealStates.get(i);
      AssertJUnit.assertTrue(resourceMap.containsKey(resourceName));
      AssertJUnit.assertEquals(resourceMap.get(resourceName).getResourceName(), resourceName);
      AssertJUnit.assertEquals(resourceMap.get(resourceName).getStateModelDefRef(),
          idealState.getStateModelDefRef());
      AssertJUnit.assertEquals(resourceMap.get(resourceName).getPartitions().size(),
          idealState.getNumPartitions());
    }
  }
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      int replicas = 1;
      String resourceName = resources[i];
      ZNRecord record =
          DefaultIdealStateCalculator.calculateIdealState(instances, partitions, replicas,
              resourceName, "MASTER", "SLAVE");
      IdealState idealState = new IdealState(record);
      idealState.setStateModelDefRef("MasterSlave");

      HelixDataAccessor accessor = manager.getHelixDataAccessor();
      Builder keyBuilder = accessor.keyBuilder();
      accessor.setProperty(keyBuilder.idealStates(resourceName), idealState);

      idealStates.add(idealState);
    }
    // ADD A LIVE INSTANCE WITH A CURRENT STATE THAT CONTAINS RESOURCE WHICH NO
    // LONGER EXISTS IN IDEALSTATE
    String instanceName = "localhost_" + 3;
    LiveInstance liveInstance = new LiveInstance(instanceName);
    String sessionId = UUID.randomUUID().toString();
    liveInstance.setSessionId(sessionId);

    HelixDataAccessor accessor = manager.getHelixDataAccessor();
    Builder keyBuilder = accessor.keyBuilder();
    accessor.setProperty(keyBuilder.liveInstance(instanceName), liveInstance);

    String oldResource = "testResourceOld";
    CurrentState currentState = new CurrentState(oldResource);
    currentState.setState("testResourceOld_0", "OFFLINE");
    currentState.setState("testResourceOld_1", "SLAVE");
    currentState.setState("testResourceOld_2", "MASTER");
    currentState.setStateModelDefRef("MasterSlave");
    accessor.setProperty(keyBuilder.currentState(instanceName, sessionId, oldResource),
        currentState);

    ResourceComputationStage stage = new ResourceComputationStage();
    runStage(event, new ReadClusterDataStage());
    runStage(event, stage);

    Map<String, Resource> resourceMap = event.getAttribute(AttributeName.RESOURCES.toString());
    // +1 because it will have one for current state
    AssertJUnit.assertEquals(resources.length + 1, resourceMap.size());

    for (int i = 0; i < resources.length; i++) {
      String resourceName = resources[i];
      IdealState idealState = idealStates.get(i);
      AssertJUnit.assertTrue(resourceMap.containsKey(resourceName));
      AssertJUnit.assertEquals(resourceMap.get(resourceName).getResourceName(), resourceName);
      AssertJUnit.assertEquals(resourceMap.get(resourceName).getStateModelDefRef(),
          idealState.getStateModelDefRef());
      AssertJUnit.assertEquals(resourceMap.get(resourceName).getPartitions().size(),
          idealState.getNumPartitions());
    }
    // Test the data derived from CurrentState
    AssertJUnit.assertTrue(resourceMap.containsKey(oldResource));
    AssertJUnit.assertEquals(resourceMap.get(oldResource).getResourceName(), oldResource);
    AssertJUnit.assertEquals(resourceMap.get(oldResource).getStateModelDefRef(),
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Related Classes of org.apache.helix.model.IdealState

  • com.linkedin.databus.cluster.DatabusCluster
  • com.linkedin.databus2.client.util.DatabusClusterUtil$DatabusClusterUtilHelper
  • org.apache.helix.api.accessor.ClusterAccessor
  • org.apache.helix.api.accessor.ParticipantAccessor
  • org.apache.helix.api.accessor.ResourceAccessor
  • org.apache.helix.api.config.ResourceConfig$Delta
  • org.apache.helix.api.TestNamespacedConfig
  • org.apache.helix.controller.rebalancer.AutoRebalancer
  • org.apache.helix.controller.rebalancer.FallbackRebalancer
  • org.apache.helix.controller.rebalancer.RebalancerRef
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