| /** |
| * 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.speculate; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId; |
| import org.apache.hadoop.mapreduce.v2.api.records.TaskId; |
| import org.apache.hadoop.mapreduce.v2.app.AppContext; |
| import org.apache.hadoop.mapreduce.v2.app.job.event.TaskAttemptStatusUpdateEvent.TaskAttemptStatus; |
| |
| |
| /* |
| * This class is provided solely as an exemplae of the values that mean |
| * that nothing needs to be computed. It's not currently used. |
| */ |
| public class NullTaskRuntimesEngine implements TaskRuntimeEstimator { |
| @Override |
| public void enrollAttempt(TaskAttemptStatus status, long timestamp) { |
| // no code |
| } |
| |
| @Override |
| public long attemptEnrolledTime(TaskAttemptId attemptID) { |
| return Long.MAX_VALUE; |
| } |
| |
| @Override |
| public void updateAttempt(TaskAttemptStatus status, long timestamp) { |
| // no code |
| } |
| |
| @Override |
| public void contextualize(Configuration conf, AppContext context) { |
| // no code |
| } |
| |
| @Override |
| public long thresholdRuntime(TaskId id) { |
| return Long.MAX_VALUE; |
| } |
| |
| @Override |
| public long estimatedRuntime(TaskAttemptId id) { |
| return -1L; |
| } |
| @Override |
| public long estimatedNewAttemptRuntime(TaskId id) { |
| return -1L; |
| } |
| |
| @Override |
| public long runtimeEstimateVariance(TaskAttemptId id) { |
| return -1L; |
| } |
| |
| } |
