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001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License. You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019 package org.apache.oozie.action.hadoop;
020
021 import org.apache.hadoop.mapred.Counters;
022 import org.apache.hadoop.mapred.Counters.Counter;
023 import org.json.simple.JSONObject;
024
025 /**
026 * Class to collect statistics for Map-Reduce action.
027 */
028 public class MRStats extends ActionStats {
029 public static final String ACTION_TYPE_LABEL = "ACTION_TYPE";
030 private Counters counters = null;
031
032 public MRStats(Counters groups) {
033 this.currentActionType = ActionType.MAP_REDUCE;
034 this.counters = groups;
035 }
036
037 @SuppressWarnings("unchecked")
038 @Override
039 public String toJSON() {
040 if (counters == null) {
041 return null;
042 }
043
044 JSONObject groups = new JSONObject();
045 groups.put(ACTION_TYPE_LABEL, getCurrentActionType().toString());
046 for (String gName : counters.getGroupNames()) {
047 JSONObject group = new JSONObject();
048 for (Counter counter : counters.getGroup(gName)) {
049 String cName = counter.getName();
050 Long cValue = counter.getValue();
051 group.put(cName, cValue);
052 }
053 groups.put(gName, group);
054 }
055 return groups.toJSONString();
056 }
057 }