| /** |
| * 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.mapreduce.v2.app; |
| |
| import java.net.InetSocketAddress; |
| |
| import org.apache.hadoop.mapred.Task; |
| import org.apache.hadoop.mapred.WrappedJvmID; |
| import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId; |
| |
| /** |
| * This class listens for changes to the state of a Task. |
| */ |
| public interface TaskAttemptListener { |
| |
| InetSocketAddress getAddress(); |
| |
| /** |
| * Register a JVM with the listener. This should be called as soon as a |
| * JVM ID is assigned to a task attempt, before it has been launched. |
| * @param task the task itself for this JVM. |
| * @param jvmID The ID of the JVM . |
| */ |
| void registerPendingTask(Task task, WrappedJvmID jvmID); |
| |
| /** |
| * Register task attempt. This should be called when the JVM has been |
| * launched. |
| * |
| * @param attemptID |
| * the id of the attempt for this JVM. |
| * @param jvmID the ID of the JVM. |
| */ |
| void registerLaunchedTask(TaskAttemptId attemptID, WrappedJvmID jvmID); |
| |
| /** |
| * Unregister the JVM and the attempt associated with it. This should be |
| * called when the attempt/JVM has finished executing and is being cleaned up. |
| * @param attemptID the ID of the attempt. |
| * @param jvmID the ID of the JVM for that attempt. |
| */ |
| void unregister(TaskAttemptId attemptID, WrappedJvmID jvmID); |
| |
| } |