1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 package org.apache.giraph.job; 20 21 import org.apache.hadoop.mapreduce.Job; 22 23 /** 24 * An observer over the job launch lifecycle. 25 */ 26 public interface GiraphJobObserver { 27 /** 28 * Callback for job about to start. 29 * @param jobToSubmit Job we're going to submit to hadoop. 30 */ 31 void launchingJob(Job jobToSubmit); 32 33 /** 34 * Callback after job was submitted. 35 * For example, you can track its progress here. 36 * @param submittedJob Job which was submitted. 37 */ 38 void jobRunning(Job submittedJob); 39 40 /** 41 * Callback when job finishes. 42 * @param submittedJob Job that ran in hadoop. 43 * @param passed true if job succeeded. 44 */ 45 void jobFinished(Job submittedJob, boolean passed); 46 47 /** 48 * Called when job gets all mappers and 49 * really starts computations. 50 * May not get called if the job progress tracker 51 * fails. 52 * @param job job that runs 53 */ 54 void jobGotAllMappers(Job job); 55 }