/**
* 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.mapred;


import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapreduce.MRJobConfig;
import org.apache.hadoop.mapreduce.security.token.JobTokenSecretManager;
import org.apache.hadoop.mapreduce.v2.api.records.JobId;
import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId;
import org.apache.hadoop.mapreduce.v2.api.records.TaskId;
import org.apache.hadoop.mapreduce.v2.app.AppContext;
import org.apache.hadoop.mapreduce.v2.app.TaskAttemptFinishingMonitor;
import org.apache.hadoop.mapreduce.v2.app.job.event.TaskAttemptEvent;
import org.apache.hadoop.mapreduce.v2.app.job.event.TaskAttemptEventType;
import org.apache.hadoop.mapreduce.v2.app.rm.RMHeartbeatHandler;
import org.apache.hadoop.mapreduce.v2.util.MRBuilderUtils;
import org.apache.hadoop.yarn.event.Event;
import org.apache.hadoop.yarn.event.EventHandler;
import org.apache.hadoop.yarn.util.SystemClock;

import org.junit.Test;
import static org.junit.Assert.assertTrue;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

public class TestTaskAttemptFinishingMonitor {

  @Test
  public void testFinshingAttemptTimeout()
      throws IOException, InterruptedException {
    SystemClock clock = new SystemClock();
    Configuration conf = new Configuration();
    conf.setInt(MRJobConfig.TASK_EXIT_TIMEOUT, 100);
    conf.setInt(MRJobConfig.TASK_EXIT_TIMEOUT_CHECK_INTERVAL_MS, 10);

    AppContext appCtx = mock(AppContext.class);
    JobTokenSecretManager secret = mock(JobTokenSecretManager.class);
    RMHeartbeatHandler rmHeartbeatHandler =
        mock(RMHeartbeatHandler.class);
    MockEventHandler eventHandler = new MockEventHandler();
    TaskAttemptFinishingMonitor taskAttemptFinishingMonitor =
        new TaskAttemptFinishingMonitor(eventHandler);
    taskAttemptFinishingMonitor.init(conf);
    taskAttemptFinishingMonitor.start();

    when(appCtx.getEventHandler()).thenReturn(eventHandler);
    when(appCtx.getNMHostname()).thenReturn("0.0.0.0");
    when(appCtx.getTaskAttemptFinishingMonitor()).thenReturn(
        taskAttemptFinishingMonitor);
    when(appCtx.getClock()).thenReturn(clock);

    TaskAttemptListenerImpl listener =
        new TaskAttemptListenerImpl(appCtx, secret, rmHeartbeatHandler, null);

    listener.init(conf);
    listener.start();

    JobId jid = MRBuilderUtils.newJobId(12345, 1, 1);
    TaskId tid = MRBuilderUtils.newTaskId(jid, 0,
        org.apache.hadoop.mapreduce.v2.api.records.TaskType.MAP);
    TaskAttemptId attemptId = MRBuilderUtils.newTaskAttemptId(tid, 0);
    appCtx.getTaskAttemptFinishingMonitor().register(attemptId);
    int check = 0;
    while ( !eventHandler.timedOut &&  check++ < 10 ) {
      Thread.sleep(100);
    }
    taskAttemptFinishingMonitor.stop();

    assertTrue("Finishing attempt didn't time out.", eventHandler.timedOut);

  }

  public static class MockEventHandler implements EventHandler {
    public boolean timedOut = false;

    @Override
    public void handle(Event event) {
      if (event instanceof TaskAttemptEvent) {
        TaskAttemptEvent attemptEvent = ((TaskAttemptEvent) event);
        if (TaskAttemptEventType.TA_TIMED_OUT == attemptEvent.getType()) {
          timedOut = true;
        }
      }
    }
  };

}