Source code

001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.reef.tests.watcher;
020
021import org.apache.reef.io.watcher.EventStream;
022import org.apache.reef.io.watcher.EventType;
023
024import javax.inject.Inject;
025import java.util.HashMap;
026import java.util.Map;
027import java.util.concurrent.atomic.AtomicInteger;
028
029/**
030 * Count events in the stream.
031 */
032public final class TestEventStream implements EventStream {
033
034  private Map<EventType, AtomicInteger> eventCounter;
035
036  @Inject
037  private TestEventStream(){
038    this.eventCounter = new HashMap<>();
039    for (final EventType type : EventType.values()) {
040      eventCounter.put(type, new AtomicInteger());
041    }
042  }
043
044  @Override
045  public void onEvent(final EventType type, final String jsonEncodedEvent) {
046    eventCounter.get(type).incrementAndGet();
047  }
048
049  private void checkEqualTo(final EventType type, final int expectedNum) {
050    final int actualNum = eventCounter.get(type).get();
051    if (actualNum != expectedNum) {
052      throw new RuntimeException("The expected number of " + type + " is "
053          + expectedNum + " but " + actualNum + " times occurred");
054    }
055  }
056
057  private void checkGreaterThan(final EventType type, final int num) {
058    final int actualNum = eventCounter.get(type).get();
059    if (actualNum < num) {
060      throw new RuntimeException("The number of event " + type + " should be greater than " + num
061          + " but " + actualNum + " times occurred");
062    }
063  }
064
065  /**
066   * This validation is called in WatcherTestDriver#RuntimeStopHandler, so RuntimeStop should not be guaranteed
067   * to be called before this.
068   */
069  public void validate() {
070    checkEqualTo(EventType.RuntimeStart, 1);
071    checkEqualTo(EventType.StartTime, 1);
072    checkEqualTo(EventType.AllocatedEvaluator, 2);
073    checkEqualTo(EventType.FailedEvaluator, 1);
074    checkEqualTo(EventType.ActiveContext, 2);
075    checkEqualTo(EventType.FailedContext, 1);
076    checkEqualTo(EventType.FailedTask, 1);
077    checkEqualTo(EventType.RunningTask, 2);
078    checkEqualTo(EventType.SuspendedTask, 1);
079    checkGreaterThan(EventType.TaskMessage, 0);
080    checkEqualTo(EventType.CompletedTask, 1);
081    checkEqualTo(EventType.ClosedContext, 1);
082    checkEqualTo(EventType.CompletedEvaluator, 1);
083    checkEqualTo(EventType.StopTime, 1);
084
085  }
086}