/**
 * 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;

/**
 * This class is used by {@link SimulatorTaskTracker}s for signaling themselves
 * when the next hearbeat() call to the JobTracker is due.
 */
class HeartbeatEvent extends SimulatorEvent {
  /**
   * Constructor.
   * 
   * @param listener
   *          the {@link SimulatorTaskTracker} this event should be delivered to
   * @param timestamp
   *          the time when this event is to be delivered
   */
  public HeartbeatEvent(SimulatorEventListener listener, long timestamp) {
    super(listener, timestamp);
  }

}