/**
 * 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.tools.rumen;

import java.io.Closeable;
import java.io.IOException;

import org.apache.hadoop.mapreduce.jobhistory.HistoryEvent;

/**
 * {@link JobHistoryParser} defines the interface of a Job History file parser.
 */
public interface JobHistoryParser extends Closeable {
  /**
   * Get the next {@link HistoryEvent}
   * @return the next {@link HistoryEvent}. If no more events left, return null.
   * @throws IOException 
   */
  HistoryEvent nextEvent() throws IOException;
  
}