| /** |
| * 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.mapred; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.apache.hadoop.mapred.StatisticsCollector.Stat; |
| |
| /** |
| * Collects the job tracker statistics. |
| * |
| */ |
| class JobTrackerStatistics { |
| |
| final StatisticsCollector collector; |
| final Map<String, TaskTrackerStat> ttStats = |
| new HashMap<String, TaskTrackerStat>(); |
| |
| JobTrackerStatistics() { |
| collector = new StatisticsCollector(); |
| collector.start(); |
| } |
| |
| synchronized void taskTrackerAdded(String name) { |
| TaskTrackerStat stat = ttStats.get(name); |
| if(stat == null) { |
| stat = new TaskTrackerStat(name); |
| ttStats.put(name, stat); |
| } |
| } |
| |
| synchronized void taskTrackerRemoved(String name) { |
| TaskTrackerStat stat = ttStats.remove(name); |
| if(stat != null) { |
| stat.remove(); |
| } |
| } |
| |
| synchronized TaskTrackerStat getTaskTrackerStat(String name) { |
| return ttStats.get(name); |
| } |
| |
| class TaskTrackerStat { |
| final String totalTasksKey; |
| final Stat totalTasksStat; |
| |
| final String succeededTasksKey; |
| final Stat succeededTasksStat; |
| |
| final String healthCheckFailedKey; |
| final Stat healthCheckFailedStat; |
| |
| TaskTrackerStat(String trackerName) { |
| totalTasksKey = trackerName+"-"+"totalTasks"; |
| totalTasksStat = collector.createStat(totalTasksKey); |
| succeededTasksKey = trackerName+"-"+"succeededTasks"; |
| succeededTasksStat = collector.createStat(succeededTasksKey); |
| healthCheckFailedKey = trackerName + "-"+ "healthcheckfailed"; |
| healthCheckFailedStat = collector.createStat(healthCheckFailedKey); |
| } |
| |
| synchronized void incrTotalTasks() { |
| totalTasksStat.inc(); |
| } |
| |
| synchronized void incrSucceededTasks() { |
| succeededTasksStat.inc(); |
| } |
| |
| synchronized void incrHealthCheckFailed() { |
| healthCheckFailedStat.inc(); |
| } |
| |
| synchronized void remove() { |
| collector.removeStat(totalTasksKey); |
| collector.removeStat(succeededTasksKey); |
| collector.removeStat(healthCheckFailedKey); |
| } |
| |
| } |
| } |