helix-core/src/test/java/org/apache/helix/controller/stages/TestCurrentStateComputationStageForHandlingCapacity.java - helix - Git at Google

 package org.apache.helix.controller.stages;

 /*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
  * regarding copyright ownership.  The ASF licenses this file
  * to you under the Apache License, Version 2.0 (the
  * "License"); you may not use this file except in compliance
  * with the License.  You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing,
  * software distributed under the License is distributed on an
  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  * KIND, either express or implied.  See the License for the
  * specific language governing permissions and limitations
  * under the License.
  */

 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Lists;
 import java.io.IOException;
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.function.Function;
 import java.util.stream.Collectors;
 import java.util.stream.IntStream;
 import org.apache.commons.lang3.RandomUtils;
 import org.apache.helix.PropertyKey.Builder;
 import org.apache.helix.controller.dataproviders.ResourceControllerDataProvider;
 import org.apache.helix.controller.dataproviders.WorkflowControllerDataProvider;
 import org.apache.helix.controller.rebalancer.DelayedAutoRebalancer;
 import org.apache.helix.controller.rebalancer.waged.WagedInstanceCapacity;
 import org.apache.helix.controller.rebalancer.waged.WagedRebalancer;
 import org.apache.helix.model.ClusterConfig;
 import org.apache.helix.model.CurrentState;
 import org.apache.helix.model.IdealState;
 import org.apache.helix.model.InstanceConfig;
 import org.apache.helix.model.Message;
 import org.apache.helix.model.Partition;
 import org.apache.helix.model.Resource;
 import org.apache.helix.model.ResourceConfig;
 import org.apache.helix.monitoring.mbeans.ClusterStatusMonitor;
 import org.apache.helix.zookeeper.datamodel.ZNRecord;
 import org.mockito.Mockito;
 import org.testng.Assert;
 import org.testng.AssertJUnit;
 import org.testng.annotations.BeforeMethod;
 import org.testng.annotations.Test;


 public class TestCurrentStateComputationStageForHandlingCapacity {

   private static final int INSTANCE_COUNT = 3;
   private static final int RESOURCE_COUNT = 2;
   private static final int PARTITION_COUNT = 3;
   private static final List<String> CAPACITY_KEYS = Lists.newArrayList("CU", "PARTCOUNT", "DISK");
   private static final Map<String, Integer> DEFAULT_INSTANCE_CAPACITY_MAP =
       ImmutableMap.of("CU", 100, "PARTCOUNT", 10, "DISK", 100);

   private static final Map<String, Integer> DEFAULT_PART_CAPACITY_MAP =
       ImmutableMap.of("CU", 10, "PARTCOUNT", 1, "DISK", 1);

   private ResourceControllerDataProvider _clusterData;
   private Map<String, Resource> _resourceMap;
   private CurrentStateOutput _currentStateOutput;
   private WagedInstanceCapacity _wagedInstanceCapacity;
   private CurrentStateComputationStage _currentStateComputationStage;

   @BeforeMethod
   public void setUp() {
     // prepare cluster data
     _clusterData = Mockito.spy(new ResourceControllerDataProvider());
     Map<String, InstanceConfig> instanceConfigMap = generateInstanceCapacityConfigs();
     _clusterData.setInstanceConfigMap(instanceConfigMap);
     _clusterData.setResourceConfigMap(generateResourcePartitionCapacityConfigs());
     _clusterData.setIdealStates(generateIdealStates());
     Mockito.doReturn(ImmutableMap.of()).when(_clusterData).getAllInstancesMessages();

     ClusterConfig clusterConfig = new ClusterConfig("test");
     clusterConfig.setTopologyAwareEnabled(false);
     clusterConfig.setInstanceCapacityKeys(CAPACITY_KEYS);
     _clusterData.setClusterConfig(clusterConfig);

     // prepare current state output
     _resourceMap = generateResourceMap();
     _currentStateOutput = populateCurrentStatesForResources(_resourceMap, instanceConfigMap.keySet());

     // prepare instance of waged-instance capacity
     _wagedInstanceCapacity = new WagedInstanceCapacity(_clusterData);
     _currentStateComputationStage = new CurrentStateComputationStage();
   }

   @Test
   public void testProcessEventWithNoWagedResources() {
     // We create ideal states with all WAGED enabled.
     Map<String, IdealState> idealStates = _clusterData.getIdealStates();

     // remove one WAGED resource from all resources.
     idealStates.forEach((resourceName, idealState) -> {
       idealState.setRebalanceMode(IdealState.RebalanceMode.CUSTOMIZED);
       idealState.setRebalancerClassName(DelayedAutoRebalancer.class.getName());
     });

     ClusterEvent clusterEvent = new ClusterEvent("test", ClusterEventType.CurrentStateChange);
     clusterEvent.addAttribute(AttributeName.ControllerDataProvider.name(), _clusterData);
     clusterEvent.addAttribute(AttributeName.RESOURCES.name(), _resourceMap);

     _currentStateComputationStage.handleResourceCapacityCalculation(clusterEvent, _clusterData, _currentStateOutput);

     // validate that we did not compute and set the capacity map.
     Assert.assertNull(_clusterData.getWagedInstanceCapacity());
   }

   @Test
   public void testProcessEventWithSomeWagedResources() {
     // We create ideal states with all WAGED enabled.
     Map<String, IdealState> idealStates = _clusterData.getIdealStates();

     // remove WAGED from one resource.
     IdealState firstIdealState = idealStates.entrySet().iterator().next().getValue();
     firstIdealState.setRebalanceMode(IdealState.RebalanceMode.CUSTOMIZED);
     firstIdealState.setRebalancerClassName(DelayedAutoRebalancer.class.getName());
     int totalIdealStates = idealStates.size();

     ClusterEvent clusterEvent = new ClusterEvent("test", ClusterEventType.CurrentStateChange);
     clusterEvent.addAttribute(AttributeName.ControllerDataProvider.name(), _clusterData);
     clusterEvent.addAttribute(AttributeName.RESOURCES.name(), _resourceMap);

     _currentStateComputationStage.handleResourceCapacityCalculation(clusterEvent, _clusterData, _currentStateOutput);

     // validate that we did not compute and set the capacity map.
     WagedInstanceCapacity wagedInstanceCapacity = _clusterData.getWagedInstanceCapacity();
     Assert.assertNotNull(wagedInstanceCapacity);

     Map<String, Map<String, Set<String>>> allocatedPartitionsMap = wagedInstanceCapacity.getAllocatedPartitionsMap();
     Set<String> resourcesAllocated = allocatedPartitionsMap.values().stream()
         .map(Map::keySet)
         .flatMap(Collection::stream)
         .collect(Collectors.toSet());

     Assert.assertEquals(resourcesAllocated.size(), totalIdealStates - 1);
   }

   @Test
   public void testProcessEventWithAllWagedResources() {
     // We create ideal states with all WAGED enabled.
     Map<String, IdealState> idealStates = _clusterData.getIdealStates();

     ClusterEvent clusterEvent = new ClusterEvent("test", ClusterEventType.CurrentStateChange);
     clusterEvent.addAttribute(AttributeName.ControllerDataProvider.name(), _clusterData);
     clusterEvent.addAttribute(AttributeName.RESOURCES.name(), _resourceMap);

     _currentStateComputationStage.handleResourceCapacityCalculation(clusterEvent, _clusterData, _currentStateOutput);

     // validate that we did not compute and set the capacity map.
     WagedInstanceCapacity wagedInstanceCapacity = _clusterData.getWagedInstanceCapacity();
     Assert.assertNotNull(wagedInstanceCapacity);

     Map<String, Map<String, Set<String>>> allocatedPartitionsMap = wagedInstanceCapacity.getAllocatedPartitionsMap();
     Set<String> resourcesAllocated = allocatedPartitionsMap.values().stream()
         .map(Map::keySet)
         .flatMap(Collection::stream)
         .collect(Collectors.toSet());

     Assert.assertEquals(resourcesAllocated.size(), idealStates.size());
   }

   @Test
   public void testSkipCapacityCalculation() {
     // case: when resource-map is null
     Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
         new ResourceControllerDataProvider(), null, new ClusterEvent(ClusterEventType.LiveInstanceChange)));

     // case: when resource-map is empty
     Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
         new ResourceControllerDataProvider(), ImmutableMap.of(), new ClusterEvent(ClusterEventType.LiveInstanceChange)));

     // case: when instance capacity is null
     Assert.assertFalse(CurrentStateComputationStage.skipCapacityCalculation(
         new ResourceControllerDataProvider(), _resourceMap, new ClusterEvent(ClusterEventType.LiveInstanceChange)));

     // case: when event is of no-op
     ResourceControllerDataProvider dataProvider = Mockito.mock(ResourceControllerDataProvider.class);
     WagedInstanceCapacity instanceCapacity = Mockito.mock(WagedInstanceCapacity.class);
     Mockito.when(dataProvider.getWagedInstanceCapacity()).thenReturn(instanceCapacity);

     Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
         dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.CustomizedStateChange)));
     Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
         dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.CustomizedViewChange)));
     Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
         dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.CustomizeStateConfigChange)));
     Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
         dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.ExternalViewChange)));
     Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
         dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.IdealStateChange)));
     Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
         dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.OnDemandRebalance)));
     Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
         dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.Resume)));
     Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
         dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.RetryRebalance)));
     Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
         dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.StateVerifier)));
     Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
         dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.TargetExternalViewChange)));
     Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
         dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.TaskCurrentStateChange)));

     Assert.assertFalse(CurrentStateComputationStage.skipCapacityCalculation(
         dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.LiveInstanceChange)));
     Assert.assertFalse(CurrentStateComputationStage.skipCapacityCalculation(
         dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.CurrentStateChange)));
     Assert.assertFalse(CurrentStateComputationStage.skipCapacityCalculation(
         dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.MessageChange)));
     Assert.assertFalse(CurrentStateComputationStage.skipCapacityCalculation(
         dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.PeriodicalRebalance)));
   }

   // -- static helpers
   private Map<String, InstanceConfig> generateInstanceCapacityConfigs() {
     Map<String, InstanceConfig> instanceConfigMap = new HashMap<>();

     for (int i = 0; i < INSTANCE_COUNT; i ++) {
       String instanceName = "instance-" + i;
       InstanceConfig config = new InstanceConfig(instanceName);
       config.setInstanceCapacityMap(DEFAULT_INSTANCE_CAPACITY_MAP);
       instanceConfigMap.put(instanceName, config);
     }

     return instanceConfigMap;
   }

   private Map<String, ResourceConfig> generateResourcePartitionCapacityConfigs() {
     Map<String, ResourceConfig> resourceConfigMap = new HashMap<>();

     try {
       Map<String, Map<String, Integer>> partitionsCapacityMap = new HashMap<>();
       partitionsCapacityMap.put("DEFAULT", DEFAULT_PART_CAPACITY_MAP);

       for (String resourceName : getResourceNames()) {
         ResourceConfig config = new ResourceConfig(resourceName);
         config.setPartitionCapacityMap(partitionsCapacityMap);
         resourceConfigMap.put(resourceName, config);
       }
     } catch(IOException e) {
       throw new RuntimeException("error while setting partition capacity map");
     }
     return resourceConfigMap;
   }

   private List<IdealState> generateIdealStates() {
     return getResourceNames().stream()
         .map(resourceName -> {
           IdealState idealState = new IdealState(resourceName);
           idealState.setRebalanceMode(IdealState.RebalanceMode.FULL_AUTO);
           idealState.setRebalancerClassName(WagedRebalancer.class.getName());
           return idealState;
         })
         .collect(Collectors.toList());
   }

   private static CurrentStateOutput populateCurrentStatesForResources(
       Map<String, Resource> resourceMap, Set<String> instanceNames) {
     CurrentStateOutput currentStateOutput = new CurrentStateOutput();

     resourceMap.forEach((resourceName, resource) ->
         resource.getPartitions().forEach(partition -> {
           int masterPartIdx = RandomUtils.nextInt(0, instanceNames.size());
           int idx = 0;
           for (Iterator<String> it = instanceNames.iterator(); it.hasNext(); idx ++) {
             currentStateOutput.setCurrentState(
                 resourceName, partition, it.next(), (idx == masterPartIdx) ? "MASTER" : "SLAVE");
           }
         }));

     return currentStateOutput;
   }

   private static Map<String, Resource> generateResourceMap() {
     return getResourceNames().stream()
         .map(resourceName -> {
           Resource resource = new Resource(resourceName);
           IntStream.range(0, PARTITION_COUNT)
               .mapToObj(i -> "partition-" + i)
               .forEach(resource::addPartition);
           return resource;
         })
         .collect(Collectors.toMap(Resource::getResourceName, Function.identity()));
   }

   private static List<String> getResourceNames() {
     return IntStream.range(0, RESOURCE_COUNT)
         .mapToObj(i -> "resource-" + i)
         .collect(Collectors.toList());
   }

 }
	package org.apache.helix.controller.stages;

	/*
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file
	* to you under the Apache License, Version 2.0 (the
	* "License"); you may not use this file except in compliance
	* with the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing,
	* software distributed under the License is distributed on an
	* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	* KIND, either express or implied. See the License for the
	* specific language governing permissions and limitations
	* under the License.
	*/

	import com.google.common.collect.ImmutableList;
	import com.google.common.collect.ImmutableMap;
	import com.google.common.collect.Lists;
	import java.io.IOException;
	import java.util.Collection;
	import java.util.HashMap;
	import java.util.Iterator;
	import java.util.List;
	import java.util.Map;
	import java.util.Set;
	import java.util.function.Function;
	import java.util.stream.Collectors;
	import java.util.stream.IntStream;
	import org.apache.commons.lang3.RandomUtils;
	import org.apache.helix.PropertyKey.Builder;
	import org.apache.helix.controller.dataproviders.ResourceControllerDataProvider;
	import org.apache.helix.controller.dataproviders.WorkflowControllerDataProvider;
	import org.apache.helix.controller.rebalancer.DelayedAutoRebalancer;
	import org.apache.helix.controller.rebalancer.waged.WagedInstanceCapacity;
	import org.apache.helix.controller.rebalancer.waged.WagedRebalancer;
	import org.apache.helix.model.ClusterConfig;
	import org.apache.helix.model.CurrentState;
	import org.apache.helix.model.IdealState;
	import org.apache.helix.model.InstanceConfig;
	import org.apache.helix.model.Message;
	import org.apache.helix.model.Partition;
	import org.apache.helix.model.Resource;
	import org.apache.helix.model.ResourceConfig;
	import org.apache.helix.monitoring.mbeans.ClusterStatusMonitor;
	import org.apache.helix.zookeeper.datamodel.ZNRecord;
	import org.mockito.Mockito;
	import org.testng.Assert;
	import org.testng.AssertJUnit;
	import org.testng.annotations.BeforeMethod;
	import org.testng.annotations.Test;


	public class TestCurrentStateComputationStageForHandlingCapacity {

	private static final int INSTANCE_COUNT = 3;
	private static final int RESOURCE_COUNT = 2;
	private static final int PARTITION_COUNT = 3;
	private static final List<String> CAPACITY_KEYS = Lists.newArrayList("CU", "PARTCOUNT", "DISK");
	private static final Map<String, Integer> DEFAULT_INSTANCE_CAPACITY_MAP =
	ImmutableMap.of("CU", 100, "PARTCOUNT", 10, "DISK", 100);

	private static final Map<String, Integer> DEFAULT_PART_CAPACITY_MAP =
	ImmutableMap.of("CU", 10, "PARTCOUNT", 1, "DISK", 1);

	private ResourceControllerDataProvider _clusterData;
	private Map<String, Resource> _resourceMap;
	private CurrentStateOutput _currentStateOutput;
	private WagedInstanceCapacity _wagedInstanceCapacity;
	private CurrentStateComputationStage _currentStateComputationStage;

	@BeforeMethod
	public void setUp() {
	// prepare cluster data
	_clusterData = Mockito.spy(new ResourceControllerDataProvider());
	Map<String, InstanceConfig> instanceConfigMap = generateInstanceCapacityConfigs();
	_clusterData.setInstanceConfigMap(instanceConfigMap);
	_clusterData.setResourceConfigMap(generateResourcePartitionCapacityConfigs());
	_clusterData.setIdealStates(generateIdealStates());
	Mockito.doReturn(ImmutableMap.of()).when(_clusterData).getAllInstancesMessages();

	ClusterConfig clusterConfig = new ClusterConfig("test");
	clusterConfig.setTopologyAwareEnabled(false);
	clusterConfig.setInstanceCapacityKeys(CAPACITY_KEYS);
	_clusterData.setClusterConfig(clusterConfig);

	// prepare current state output
	_resourceMap = generateResourceMap();
	_currentStateOutput = populateCurrentStatesForResources(_resourceMap, instanceConfigMap.keySet());

	// prepare instance of waged-instance capacity
	_wagedInstanceCapacity = new WagedInstanceCapacity(_clusterData);
	_currentStateComputationStage = new CurrentStateComputationStage();
	}

	@Test
	public void testProcessEventWithNoWagedResources() {
	// We create ideal states with all WAGED enabled.
	Map<String, IdealState> idealStates = _clusterData.getIdealStates();

	// remove one WAGED resource from all resources.
	idealStates.forEach((resourceName, idealState) -> {
	idealState.setRebalanceMode(IdealState.RebalanceMode.CUSTOMIZED);
	idealState.setRebalancerClassName(DelayedAutoRebalancer.class.getName());
	});

	ClusterEvent clusterEvent = new ClusterEvent("test", ClusterEventType.CurrentStateChange);
	clusterEvent.addAttribute(AttributeName.ControllerDataProvider.name(), _clusterData);
	clusterEvent.addAttribute(AttributeName.RESOURCES.name(), _resourceMap);

	_currentStateComputationStage.handleResourceCapacityCalculation(clusterEvent, _clusterData, _currentStateOutput);

	// validate that we did not compute and set the capacity map.
	Assert.assertNull(_clusterData.getWagedInstanceCapacity());
	}

	@Test
	public void testProcessEventWithSomeWagedResources() {
	// We create ideal states with all WAGED enabled.
	Map<String, IdealState> idealStates = _clusterData.getIdealStates();

	// remove WAGED from one resource.
	IdealState firstIdealState = idealStates.entrySet().iterator().next().getValue();
	firstIdealState.setRebalanceMode(IdealState.RebalanceMode.CUSTOMIZED);
	firstIdealState.setRebalancerClassName(DelayedAutoRebalancer.class.getName());
	int totalIdealStates = idealStates.size();

	ClusterEvent clusterEvent = new ClusterEvent("test", ClusterEventType.CurrentStateChange);
	clusterEvent.addAttribute(AttributeName.ControllerDataProvider.name(), _clusterData);
	clusterEvent.addAttribute(AttributeName.RESOURCES.name(), _resourceMap);

	_currentStateComputationStage.handleResourceCapacityCalculation(clusterEvent, _clusterData, _currentStateOutput);

	// validate that we did not compute and set the capacity map.
	WagedInstanceCapacity wagedInstanceCapacity = _clusterData.getWagedInstanceCapacity();
	Assert.assertNotNull(wagedInstanceCapacity);

	Map<String, Map<String, Set<String>>> allocatedPartitionsMap = wagedInstanceCapacity.getAllocatedPartitionsMap();
	Set<String> resourcesAllocated = allocatedPartitionsMap.values().stream()
	.map(Map::keySet)
	.flatMap(Collection::stream)
	.collect(Collectors.toSet());

	Assert.assertEquals(resourcesAllocated.size(), totalIdealStates - 1);
	}

	@Test
	public void testProcessEventWithAllWagedResources() {
	// We create ideal states with all WAGED enabled.
	Map<String, IdealState> idealStates = _clusterData.getIdealStates();

	ClusterEvent clusterEvent = new ClusterEvent("test", ClusterEventType.CurrentStateChange);
	clusterEvent.addAttribute(AttributeName.ControllerDataProvider.name(), _clusterData);
	clusterEvent.addAttribute(AttributeName.RESOURCES.name(), _resourceMap);

	_currentStateComputationStage.handleResourceCapacityCalculation(clusterEvent, _clusterData, _currentStateOutput);

	// validate that we did not compute and set the capacity map.
	WagedInstanceCapacity wagedInstanceCapacity = _clusterData.getWagedInstanceCapacity();
	Assert.assertNotNull(wagedInstanceCapacity);

	Map<String, Map<String, Set<String>>> allocatedPartitionsMap = wagedInstanceCapacity.getAllocatedPartitionsMap();
	Set<String> resourcesAllocated = allocatedPartitionsMap.values().stream()
	.map(Map::keySet)
	.flatMap(Collection::stream)
	.collect(Collectors.toSet());

	Assert.assertEquals(resourcesAllocated.size(), idealStates.size());
	}

	@Test
	public void testSkipCapacityCalculation() {
	// case: when resource-map is null
	Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
	new ResourceControllerDataProvider(), null, new ClusterEvent(ClusterEventType.LiveInstanceChange)));

	// case: when resource-map is empty
	Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
	new ResourceControllerDataProvider(), ImmutableMap.of(), new ClusterEvent(ClusterEventType.LiveInstanceChange)));

	// case: when instance capacity is null
	Assert.assertFalse(CurrentStateComputationStage.skipCapacityCalculation(
	new ResourceControllerDataProvider(), _resourceMap, new ClusterEvent(ClusterEventType.LiveInstanceChange)));

	// case: when event is of no-op
	ResourceControllerDataProvider dataProvider = Mockito.mock(ResourceControllerDataProvider.class);
	WagedInstanceCapacity instanceCapacity = Mockito.mock(WagedInstanceCapacity.class);
	Mockito.when(dataProvider.getWagedInstanceCapacity()).thenReturn(instanceCapacity);

	Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
	dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.CustomizedStateChange)));
	Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
	dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.CustomizedViewChange)));
	Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
	dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.CustomizeStateConfigChange)));
	Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
	dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.ExternalViewChange)));
	Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
	dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.IdealStateChange)));
	Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
	dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.OnDemandRebalance)));
	Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
	dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.Resume)));
	Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
	dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.RetryRebalance)));
	Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
	dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.StateVerifier)));
	Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
	dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.TargetExternalViewChange)));
	Assert.assertTrue(CurrentStateComputationStage.skipCapacityCalculation(
	dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.TaskCurrentStateChange)));

	Assert.assertFalse(CurrentStateComputationStage.skipCapacityCalculation(
	dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.LiveInstanceChange)));
	Assert.assertFalse(CurrentStateComputationStage.skipCapacityCalculation(
	dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.CurrentStateChange)));
	Assert.assertFalse(CurrentStateComputationStage.skipCapacityCalculation(
	dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.MessageChange)));
	Assert.assertFalse(CurrentStateComputationStage.skipCapacityCalculation(
	dataProvider, _resourceMap, new ClusterEvent(ClusterEventType.PeriodicalRebalance)));
	}

	// -- static helpers
	private Map<String, InstanceConfig> generateInstanceCapacityConfigs() {
	Map<String, InstanceConfig> instanceConfigMap = new HashMap<>();

	for (int i = 0; i < INSTANCE_COUNT; i ++) {
	String instanceName = "instance-" + i;
	InstanceConfig config = new InstanceConfig(instanceName);
	config.setInstanceCapacityMap(DEFAULT_INSTANCE_CAPACITY_MAP);
	instanceConfigMap.put(instanceName, config);
	}

	return instanceConfigMap;
	}

	private Map<String, ResourceConfig> generateResourcePartitionCapacityConfigs() {
	Map<String, ResourceConfig> resourceConfigMap = new HashMap<>();

	try {
	Map<String, Map<String, Integer>> partitionsCapacityMap = new HashMap<>();
	partitionsCapacityMap.put("DEFAULT", DEFAULT_PART_CAPACITY_MAP);

	for (String resourceName : getResourceNames()) {
	ResourceConfig config = new ResourceConfig(resourceName);
	config.setPartitionCapacityMap(partitionsCapacityMap);
	resourceConfigMap.put(resourceName, config);
	}
	} catch(IOException e) {
	throw new RuntimeException("error while setting partition capacity map");
	}
	return resourceConfigMap;
	}

	private List<IdealState> generateIdealStates() {
	return getResourceNames().stream()
	.map(resourceName -> {
	IdealState idealState = new IdealState(resourceName);
	idealState.setRebalanceMode(IdealState.RebalanceMode.FULL_AUTO);
	idealState.setRebalancerClassName(WagedRebalancer.class.getName());
	return idealState;
	})
	.collect(Collectors.toList());
	}

	private static CurrentStateOutput populateCurrentStatesForResources(
	Map<String, Resource> resourceMap, Set<String> instanceNames) {
	CurrentStateOutput currentStateOutput = new CurrentStateOutput();

	resourceMap.forEach((resourceName, resource) ->
	resource.getPartitions().forEach(partition -> {
	int masterPartIdx = RandomUtils.nextInt(0, instanceNames.size());
	int idx = 0;
	for (Iterator<String> it = instanceNames.iterator(); it.hasNext(); idx ++) {
	currentStateOutput.setCurrentState(
	resourceName, partition, it.next(), (idx == masterPartIdx) ? "MASTER" : "SLAVE");
	}
	}));

	return currentStateOutput;
	}

	private static Map<String, Resource> generateResourceMap() {
	return getResourceNames().stream()
	.map(resourceName -> {
	Resource resource = new Resource(resourceName);
	IntStream.range(0, PARTITION_COUNT)
	.mapToObj(i -> "partition-" + i)
	.forEach(resource::addPartition);
	return resource;
	})
	.collect(Collectors.toMap(Resource::getResourceName, Function.identity()));
	}

	private static List<String> getResourceNames() {
	return IntStream.range(0, RESOURCE_COUNT)
	.mapToObj(i -> "resource-" + i)
	.collect(Collectors.toList());
	}

	}