| package org.apache.helix.controller.rebalancer.waged.constraints; |
| |
| /* |
| * 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 java.io.IOException; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableMap; |
| import org.apache.helix.HelixRebalanceException; |
| import org.apache.helix.controller.rebalancer.waged.model.ClusterModel; |
| import org.apache.helix.controller.rebalancer.waged.model.ClusterModelTestHelper; |
| import org.apache.helix.controller.rebalancer.waged.model.OptimalAssignment; |
| import org.testng.Assert; |
| import org.testng.annotations.Test; |
| |
| import static org.mockito.Matchers.any; |
| import static org.mockito.Mockito.mock; |
| import static org.mockito.Mockito.when; |
| |
| |
| public class TestConstraintBasedAlgorithm { |
| @Test(expectedExceptions = HelixRebalanceException.class) |
| public void testCalculateNoValidAssignment() throws IOException, HelixRebalanceException { |
| HardConstraint mockHardConstraint = mock(HardConstraint.class); |
| SoftConstraint mockSoftConstraint = mock(SoftConstraint.class); |
| when(mockHardConstraint.isAssignmentValid(any(), any(), any())).thenReturn(false); |
| when(mockSoftConstraint.getAssignmentNormalizedScore(any(), any(), any())).thenReturn(1.0); |
| ConstraintBasedAlgorithm algorithm = |
| new ConstraintBasedAlgorithm(ImmutableList.of(mockHardConstraint), |
| ImmutableMap.of(mockSoftConstraint, 1f)); |
| ClusterModel clusterModel = new ClusterModelTestHelper().getDefaultClusterModel(); |
| algorithm.calculate(clusterModel); |
| } |
| |
| @Test |
| public void testCalculateWithValidAssignment() throws IOException, HelixRebalanceException { |
| HardConstraint mockHardConstraint = mock(HardConstraint.class); |
| SoftConstraint mockSoftConstraint = mock(SoftConstraint.class); |
| when(mockHardConstraint.isAssignmentValid(any(), any(), any())).thenReturn(true); |
| when(mockSoftConstraint.getAssignmentNormalizedScore(any(), any(), any())).thenReturn(1.0); |
| ConstraintBasedAlgorithm algorithm = |
| new ConstraintBasedAlgorithm(ImmutableList.of(mockHardConstraint), |
| ImmutableMap.of(mockSoftConstraint, 1f)); |
| ClusterModel clusterModel = new ClusterModelTestHelper().getDefaultClusterModel(); |
| OptimalAssignment optimalAssignment = algorithm.calculate(clusterModel); |
| |
| Assert.assertFalse(optimalAssignment.hasAnyFailure()); |
| } |
| |
| @Test |
| public void testCalculateScoreDeterminism() throws IOException, HelixRebalanceException { |
| HardConstraint mockHardConstraint = mock(HardConstraint.class); |
| SoftConstraint mockSoftConstraint = mock(SoftConstraint.class); |
| when(mockHardConstraint.isAssignmentValid(any(), any(), any())).thenReturn(true); |
| when(mockSoftConstraint.getAssignmentNormalizedScore(any(), any(), any())).thenReturn(1.0); |
| ConstraintBasedAlgorithm algorithm = |
| new ConstraintBasedAlgorithm(ImmutableList.of(mockHardConstraint), |
| ImmutableMap.of(mockSoftConstraint, 1f)); |
| ClusterModel clusterModel = new ClusterModelTestHelper().getMultiNodeClusterModel(); |
| OptimalAssignment optimalAssignment = algorithm.calculate(clusterModel); |
| |
| optimalAssignment.getOptimalResourceAssignment().values().forEach( |
| resourceAssignment -> resourceAssignment.getMappedPartitions().forEach(partition -> { |
| Assert.assertEquals(resourceAssignment.getReplicaMap(partition).keySet().size(), 1); |
| Assert.assertTrue(resourceAssignment.getReplicaMap(partition) |
| .containsKey(ClusterModelTestHelper.TEST_INSTANCE_ID_1)); |
| })); |
| } |
| |
| // Add capacity related hard/soft constraint to test sorting algorithm in ConstraintBasedAlgorithm. |
| @Test |
| public void testSortingByResourceCapacity() throws IOException, HelixRebalanceException { |
| HardConstraint nodeCapacityConstraint = new NodeCapacityConstraint(); |
| SoftConstraint soft1 = new MaxCapacityUsageInstanceConstraint(); |
| SoftConstraint soft2 = new InstancePartitionsCountConstraint(); |
| ConstraintBasedAlgorithm algorithm = |
| new ConstraintBasedAlgorithm(ImmutableList.of(nodeCapacityConstraint), |
| ImmutableMap.of(soft1, 1f, soft2, 1f)); |
| ClusterModel clusterModel = new ClusterModelTestHelper().getMultiNodeClusterModel(); |
| OptimalAssignment optimalAssignment = algorithm.calculate(clusterModel); |
| |
| Assert.assertFalse(optimalAssignment.hasAnyFailure()); |
| } |
| |
| // Add neg test for error handling in ConstraintBasedAlgorithm replica sorting. |
| @Test |
| public void testSortingEarlyQuitLackCapacity() throws IOException, HelixRebalanceException { |
| HardConstraint nodeCapacityConstraint = new NodeCapacityConstraint(); |
| SoftConstraint soft1 = new MaxCapacityUsageInstanceConstraint(); |
| SoftConstraint soft2 = new InstancePartitionsCountConstraint(); |
| ConstraintBasedAlgorithm algorithm = |
| new ConstraintBasedAlgorithm(ImmutableList.of(nodeCapacityConstraint), |
| ImmutableMap.of(soft1, 1f, soft2, 1f)); |
| ClusterModel clusterModel = |
| new ClusterModelTestHelper().getMultiNodeClusterModelNegativeSetup(); |
| try { |
| OptimalAssignment optimalAssignment = algorithm.calculate(clusterModel); |
| } catch (HelixRebalanceException ex) { |
| Assert.assertEquals(ex.getFailureType(), HelixRebalanceException.Type.FAILED_TO_CALCULATE); |
| Assert.assertEquals(ex.getMessage(), |
| "The cluster does not have enough item1 capacity for all partitions. Failure Type: FAILED_TO_CALCULATE"); |
| } |
| } |
| } |