| package org.apache.helix.integration; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.helix.HelixDataAccessor; |
| import org.apache.helix.PropertyKey; |
| import org.apache.helix.ZNRecord; |
| import org.apache.helix.controller.dataproviders.ResourceControllerDataProvider; |
| import org.apache.helix.controller.stages.AttributeName; |
| import org.apache.helix.controller.stages.BestPossibleStateOutput; |
| import org.apache.helix.controller.stages.ClusterEvent; |
| import org.apache.helix.controller.stages.ClusterEventType; |
| import org.apache.helix.controller.stages.PersistAssignmentStage; |
| import org.apache.helix.controller.stages.ReadClusterDataStage; |
| import org.apache.helix.controller.stages.ResourceComputationStage; |
| import org.apache.helix.integration.common.ZkStandAloneCMTestBase; |
| import org.apache.helix.model.ClusterConfig; |
| import org.apache.helix.model.IdealState; |
| import org.apache.helix.model.Partition; |
| import org.apache.helix.tools.DefaultIdealStateCalculator; |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| |
| |
| public class TestPersistAssignmentStage extends ZkStandAloneCMTestBase { |
| ClusterEvent event = new ClusterEvent(ClusterEventType.Unknown); |
| |
| /** |
| * Case where we have one resource in IdealState |
| * @throws Exception |
| */ |
| @Test |
| public void testSimple() throws Exception { |
| int nodes = 2; |
| List<String> instances = new ArrayList<>(); |
| for (int i = 0; i < nodes; i++) { |
| instances.add("localhost_" + i); |
| } |
| int partitions = 10; |
| int replicas = 1; |
| String resourceName = "testResource"; |
| event.addAttribute(AttributeName.ControllerDataProvider.name(), |
| new ResourceControllerDataProvider()); |
| ZNRecord record = |
| DefaultIdealStateCalculator.calculateIdealState(instances, partitions, replicas, resourceName, "ONLINE", |
| "OFFLINE"); |
| IdealState idealState = new IdealState(record); |
| idealState.setStateModelDefRef("OnlineOffline"); |
| |
| // Read and load current state into event |
| HelixDataAccessor accessor = _manager.getHelixDataAccessor(); |
| PropertyKey.Builder keyBuilder = accessor.keyBuilder(); |
| accessor.setProperty(keyBuilder.idealStates(resourceName), idealState); |
| runStage(_manager, event, new ReadClusterDataStage()); |
| runStage(_manager, event, new ResourceComputationStage()); |
| |
| // Ensure persist best possible assignment is true |
| ClusterConfig clusterConfig = new ClusterConfig(CLUSTER_NAME); |
| clusterConfig.setPersistBestPossibleAssignment(true); |
| ResourceControllerDataProvider cache = |
| event.getAttribute(AttributeName.ControllerDataProvider.name()); |
| cache.setClusterConfig(clusterConfig); |
| |
| // 1. Change best possible state (simulate a new rebalancer run) |
| BestPossibleStateOutput bestPossibleStateOutput = new BestPossibleStateOutput(); |
| for (String partition : idealState.getPartitionSet()) { |
| bestPossibleStateOutput.setState(resourceName, new Partition(partition), "localhost_3", "OFFLINE"); |
| } |
| // 2. At the same time, set DelayRebalanceEnabled = true (simulate a Admin operation at the same time) |
| idealState.setDelayRebalanceEnabled(true); |
| accessor.setProperty(keyBuilder.idealStates(resourceName), idealState); |
| |
| // Persist new assignment |
| PersistAssignmentStage stage = new PersistAssignmentStage(); |
| event.addAttribute(AttributeName.BEST_POSSIBLE_STATE.name(), bestPossibleStateOutput); |
| runStage(_manager, event, stage); |
| |
| IdealState newIdealState = accessor.getProperty(keyBuilder.idealStates(resourceName)); |
| // 1. New assignment should be set |
| Assert.assertEquals(newIdealState.getPartitionSet().size(), idealState.getPartitionSet().size()); |
| for (String partition : idealState.getPartitionSet()) { |
| Map<String, String> assignment = newIdealState.getInstanceStateMap(partition); |
| Assert.assertNotNull(assignment); |
| Assert.assertEquals(assignment.size(),1); |
| Assert.assertTrue(assignment.containsKey("localhost_3") && assignment.get("localhost_3").equals("OFFLINE")); |
| } |
| // 2. Admin config should be set |
| Assert.assertTrue(newIdealState.isDelayRebalanceEnabled()); |
| } |
| } |