/*
 * 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 org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.metrics2.MetricsSystem;
import org.apache.hadoop.metrics2.lib.DefaultMetricsSystem;

class JobTrackerInstrumentation {
  private static final Log LOG =
      LogFactory.getLog(JobTrackerInstrumentation.class);

  protected final JobTracker tracker;
  
  public JobTrackerInstrumentation(JobTracker jt, JobConf conf) {
    tracker = jt;
  }

  public void launchMap(TaskAttemptID taskAttemptID, boolean speculative)
  { }

  public void completeMap(TaskAttemptID taskAttemptID)
  { }

  public void failedMap(TaskAttemptID taskAttemptID, boolean taskNowWaiting)
  { }

  public void launchReduce(TaskAttemptID taskAttemptID, boolean speculative)
  { }

  public void completeReduce(TaskAttemptID taskAttemptID)
  { }
  
  public void failedReduce(TaskAttemptID taskAttemptID, boolean taskNowWaiting)
  { }

  public void submitJob(JobConf conf, JobID id) 
  { }
    
  public void completeJob(JobConf conf, JobID id) 
  { }

  public void terminateJob(JobConf conf, JobID id) 
  { }
  
  public void finalizeJob(JobConf conf, JobID id) 
  { }
  
  public void addWaitingMaps(JobID id, int task)
  { }
  
  public void decWaitingMaps(JobID id, int task) 
  { }
  
  public void addWaitingReduces(JobID id, int task)
  { }
  
  public void decWaitingReduces(JobID id, int task)
  { }

  public void setMapSlots(int slots)
  { }

  public void setReduceSlots(int slots)
  { }

  public void addBlackListedMapSlots(int slots)
  { }

  public void decBlackListedMapSlots(int slots)
  { }

  public void addBlackListedReduceSlots(int slots)
  { }

  public void decBlackListedReduceSlots(int slots)
  { }

  public void addReservedMapSlots(int slots)
  { }

  public void decReservedMapSlots(int slots)
  { }

  public void addReservedReduceSlots(int slots)
  { }

  public void decReservedReduceSlots(int slots)
  { }

  public void addOccupiedMapSlots(int slots)
  { }

  public void decOccupiedMapSlots(int slots)
  { }

  public void addOccupiedReduceSlots(int slots)
  { }

  public void decOccupiedReduceSlots(int slots)
  { }

  public void failedJob(JobConf conf, JobID id) 
  { }

  public void killedJob(JobConf conf, JobID id) 
  { }

  public void addPrepJob(JobConf conf, JobID id) 
  { }
  
  public void decPrepJob(JobConf conf, JobID id) 
  { }

  public void addRunningJob(JobConf conf, JobID id) 
  { }

  public void decRunningJob(JobConf conf, JobID id) 
  { }

  public void addRunningMaps(int tasks)
  { }

  public void decRunningMaps(int tasks) 
  { }

  public void addRunningReduces(int tasks)
  { }

  public void decRunningReduces(int tasks)
  { }

  public void killedMap(TaskAttemptID taskAttemptID)
  { }

  public void killedReduce(TaskAttemptID taskAttemptID)
  { }

  public void addTrackers(int trackers)
  { }

  public void decTrackers(int trackers)
  { }

  public void addBlackListedTrackers(int trackers)
  { }

  public void decBlackListedTrackers(int trackers)
  { }

  public void addGrayListedTrackers(int trackers)
  { }

  public void decGrayListedTrackers(int trackers)
  { }

  public void setDecommissionedTrackers(int trackers)
  { }   

  public void heartbeat() {
  }

  static JobTrackerInstrumentation create(JobTracker jt, JobConf conf) {
    return create(jt, conf, DefaultMetricsSystem.INSTANCE);
  }

  static JobTrackerInstrumentation create(JobTracker jt, JobConf conf,
                                          MetricsSystem ms) {
    return ms.register("JobTrackerMetrics", "JobTracker metrics",
                       new JobTrackerMetricsSource(jt, conf));
  }

}