| /** |
| * 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.mrunit.internal.counters; |
| |
| import static org.apache.hadoop.mrunit.internal.util.ArgumentChecker.returnNonNull; |
| |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.LinkedList; |
| |
| import org.apache.hadoop.mapred.Counters.Group; |
| import org.apache.hadoop.mapreduce.Counter; |
| import org.apache.hadoop.mapreduce.CounterGroup; |
| import org.apache.hadoop.mrunit.types.Pair; |
| |
| /** |
| * Wrapper around Counters from both mapred and mapreduce packages so that we |
| * can work with both counter classes in the same way. |
| */ |
| public class CounterWrapper { |
| |
| /** |
| * Wrap old mapred counter class |
| */ |
| private org.apache.hadoop.mapred.Counters mapred; |
| |
| /** |
| * Wrap new mapreduce counter class |
| */ |
| private org.apache.hadoop.mapreduce.Counters mapreduce; |
| |
| /** |
| * Wrap old counter object |
| * |
| * @param counters |
| */ |
| public CounterWrapper(final org.apache.hadoop.mapred.Counters counters) { |
| mapred = returnNonNull(counters); |
| } |
| |
| /** |
| * Wrap new counter object |
| * |
| * @param counters |
| */ |
| public CounterWrapper(final org.apache.hadoop.mapreduce.Counters counters) { |
| mapreduce = returnNonNull(counters); |
| } |
| |
| /** |
| * Get counter value based on Enumeration |
| * |
| * @param e |
| * @return |
| */ |
| public long findCounterValue(final Enum<?> e) { |
| if (mapred != null) { |
| return mapred.findCounter(e).getValue(); |
| } else { |
| return mapreduce.findCounter(e).getValue(); |
| } |
| } |
| |
| /** |
| * Get counter value based on name |
| * |
| * @param group |
| * @param name |
| * @return |
| */ |
| public long findCounterValue(final String group, final String name) { |
| if (mapred != null) { |
| return mapred.findCounter(group, name).getValue(); |
| } else { |
| return mapreduce.findCounter(group, name).getValue(); |
| } |
| } |
| |
| public Iterable<String> getGroupNames() { |
| if (mapred != null) { |
| return mapred.getGroupNames(); |
| } else { |
| return mapreduce.getGroupNames(); |
| } |
| } |
| |
| /** |
| * @return the name of all counters |
| */ |
| public Collection<Pair<String, String>> findCounterValues() { |
| final Collection<Pair<String, String>> counters = new LinkedList<Pair<String, String>>(); |
| final Iterable<String> groupNames = getGroupNames(); |
| if (mapred != null) { |
| for (String groupName : groupNames) { |
| final Group group = mapred.getGroup(groupName); |
| collectCounters(counters, groupName, group.iterator()); |
| } |
| } else { |
| for (String groupName : groupNames) { |
| final CounterGroup group = mapreduce.getGroup(groupName); |
| collectCounters(counters, groupName, group.iterator()); |
| } |
| } |
| return counters; |
| } |
| |
| /** Collect counters, same for both APIs **/ |
| private void collectCounters(final Collection<Pair<String, String>> counters, |
| String groupName, Iterator<? extends Counter> iterator) { |
| while (iterator.hasNext()) { |
| String counter = iterator.next().getName(); |
| counters.add(new Pair<String, String>(groupName, counter)); |
| } |
| } |
| } |