/*

  * 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.giraph.job;

 import org.apache.hadoop.mapreduce.Job;

 import java.io.IOException;

 /**

  * Class to decide whether a GiraphJob should be restarted after failure.

  */

 public interface GiraphJobRetryChecker {

   /**

    * Check if the job should be retried

    *

    * @param submittedJob Job that ran and failed

    * @param tryCount How many times have we tried to run the job until now

    *

    * @return True iff job should be retried

    */

   boolean shouldRetry(Job submittedJob, int tryCount);

   /**

    * The job has been checkpointed and halted. Should we now restart it?

    * @param lastAttempt latest failed job

    * @return JobID of job to be restarted or null if

    * we don't want to restart anything

    */

   String shouldRestartCheckpoint(Job lastAttempt) throws IOException;

 }