| /** |
| * 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. |
| */ |
| |
| package org.apache.hadoop.yarn.server.federation.policies.router; |
| |
| import static org.mockito.Mockito.mock; |
| import static org.mockito.Mockito.when; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| import org.apache.hadoop.yarn.api.records.ApplicationSubmissionContext; |
| import org.apache.hadoop.yarn.exceptions.YarnException; |
| import org.apache.hadoop.yarn.server.federation.store.records.SubClusterId; |
| import org.apache.hadoop.yarn.server.federation.utils.FederationPoliciesTestUtil; |
| import org.junit.Assert; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| /** |
| * Simple test class for the {@link HashBasedRouterPolicy}. Tests that one of |
| * the active sub-cluster is chosen. |
| */ |
| public class TestHashBasedRouterPolicy extends BaseRouterPoliciesTest { |
| |
| private int numSubclusters = 10; |
| |
| @Before |
| public void setUp() throws Exception { |
| |
| // set policy in base class |
| setPolicy(new HashBasedRouterPolicy()); |
| |
| // setting up the active sub-clusters for this test |
| setMockActiveSubclusters(numSubclusters); |
| |
| // initialize policy with context |
| FederationPoliciesTestUtil.initializePolicyContext(getPolicy(), |
| getPolicyInfo(), getActiveSubclusters()); |
| } |
| |
| @Test |
| public void testHashSpreadUniformlyAmongSubclusters() throws YarnException { |
| SubClusterId chosen; |
| |
| Map<SubClusterId, AtomicLong> counter = new HashMap<>(); |
| for (SubClusterId id : getActiveSubclusters().keySet()) { |
| counter.put(id, new AtomicLong(0)); |
| } |
| |
| long jobPerSub = 100; |
| |
| ApplicationSubmissionContext applicationSubmissionContext = |
| mock(ApplicationSubmissionContext.class); |
| for (int i = 0; i < jobPerSub * numSubclusters; i++) { |
| when(applicationSubmissionContext.getQueue()).thenReturn("queue" + i); |
| chosen = ((FederationRouterPolicy) getPolicy()) |
| .getHomeSubcluster(applicationSubmissionContext, null); |
| counter.get(chosen).addAndGet(1); |
| } |
| |
| // hash spread the jobs equally among the subclusters |
| for (AtomicLong a : counter.values()) { |
| Assert.assertEquals(a.get(), jobPerSub); |
| } |
| |
| } |
| } |