| /** |
| * 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.resourcemanager.scheduler.fair; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| public class FairSchedulerWithMockPreemption extends FairScheduler { |
| static final long DELAY_FOR_NEXT_STARVATION_CHECK_MS = 10 * 60 * 1000; |
| |
| @Override |
| protected void createPreemptionThread() { |
| preemptionThread = new MockPreemptionThread(this); |
| } |
| |
| static class MockPreemptionThread extends FSPreemptionThread { |
| private Set<FSAppAttempt> appsAdded = new HashSet<>(); |
| private int totalAppsAdded = 0; |
| |
| private MockPreemptionThread(FairScheduler scheduler) { |
| super(scheduler); |
| } |
| |
| @Override |
| public void run() { |
| while (!Thread.interrupted()) { |
| try { |
| FSAppAttempt app = context.getStarvedApps().take(); |
| appsAdded.add(app); |
| totalAppsAdded++; |
| app.preemptionTriggered(DELAY_FOR_NEXT_STARVATION_CHECK_MS); |
| } catch (InterruptedException e) { |
| return; |
| } |
| } |
| } |
| |
| int uniqueAppsAdded() { |
| return appsAdded.size(); |
| } |
| |
| int totalAppsAdded() { |
| return totalAppsAdded; |
| } |
| } |
| } |