| /** |
| * 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; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| import java.util.Iterator; |
| import java.util.MissingResourceException; |
| import java.util.ResourceBundle; |
| import java.util.TreeMap; |
| |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hadoop.io.WritableUtils; |
| |
| /** |
| * A group of {@link Counter}s that logically belong together. Typically, |
| * it is an {@link Enum} subclass and the counters are the values. |
| */ |
| public class CounterGroup implements Writable, Iterable<Counter> { |
| private String name; |
| private String displayName; |
| private TreeMap<String, Counter> counters = new TreeMap<String, Counter>(); |
| // Optional ResourceBundle for localization of group and counter names. |
| private ResourceBundle bundle = null; |
| |
| /** |
| * Returns the specified resource bundle, or throws an exception. |
| * @throws MissingResourceException if the bundle isn't found |
| */ |
| private static ResourceBundle getResourceBundle(String enumClassName) { |
| String bundleName = enumClassName.replace('$','_'); |
| return ResourceBundle.getBundle(bundleName); |
| } |
| |
| protected CounterGroup(String name) { |
| this.name = name; |
| try { |
| bundle = getResourceBundle(name); |
| } |
| catch (MissingResourceException neverMind) { |
| } |
| displayName = localize("CounterGroupName", name); |
| } |
| |
| protected CounterGroup(String name, String displayName) { |
| this.name = name; |
| this.displayName = displayName; |
| } |
| |
| /** |
| * Get the internal name of the group |
| * @return the internal name |
| */ |
| public synchronized String getName() { |
| return name; |
| } |
| |
| /** |
| * Get the display name of the group. |
| * @return the human readable name |
| */ |
| public synchronized String getDisplayName() { |
| return displayName; |
| } |
| |
| synchronized void addCounter(Counter counter) { |
| counters.put(counter.getName(), counter); |
| } |
| |
| /** |
| * Internal to find a counter in a group. |
| * @param counterName the name of the counter |
| * @param displayName the display name of the counter |
| * @return the counter that was found or added |
| */ |
| protected Counter findCounter(String counterName, String displayName) { |
| Counter result = counters.get(counterName); |
| if (result == null) { |
| result = new Counter(counterName, displayName); |
| counters.put(counterName, result); |
| } |
| return result; |
| } |
| |
| public synchronized Counter findCounter(String counterName) { |
| Counter result = counters.get(counterName); |
| if (result == null) { |
| String displayName = localize(counterName, counterName); |
| result = new Counter(counterName, displayName); |
| counters.put(counterName, result); |
| } |
| return result; |
| } |
| |
| public synchronized Iterator<Counter> iterator() { |
| return counters.values().iterator(); |
| } |
| |
| public synchronized void write(DataOutput out) throws IOException { |
| Text.writeString(out, displayName); |
| WritableUtils.writeVInt(out, counters.size()); |
| for(Counter counter: counters.values()) { |
| counter.write(out); |
| } |
| } |
| |
| public synchronized void readFields(DataInput in) throws IOException { |
| displayName = Text.readString(in); |
| counters.clear(); |
| int size = WritableUtils.readVInt(in); |
| for(int i=0; i < size; i++) { |
| Counter counter = new Counter(); |
| counter.readFields(in); |
| counters.put(counter.getName(), counter); |
| } |
| } |
| |
| /** |
| * Looks up key in the ResourceBundle and returns the corresponding value. |
| * If the bundle or the key doesn't exist, returns the default value. |
| */ |
| private String localize(String key, String defaultValue) { |
| String result = defaultValue; |
| if (bundle != null) { |
| try { |
| result = bundle.getString(key); |
| } |
| catch (MissingResourceException mre) { |
| } |
| } |
| return result; |
| } |
| |
| /** |
| * Returns the number of counters in this group. |
| */ |
| public synchronized int size() { |
| return counters.size(); |
| } |
| |
| public synchronized boolean equals(Object genericRight) { |
| if (genericRight instanceof CounterGroup) { |
| Iterator<Counter> right = ((CounterGroup) genericRight).counters. |
| values().iterator(); |
| Iterator<Counter> left = counters.values().iterator(); |
| while (left.hasNext()) { |
| if (!right.hasNext() || !left.next().equals(right.next())) { |
| return false; |
| } |
| } |
| return !right.hasNext(); |
| } |
| return false; |
| } |
| |
| public synchronized int hashCode() { |
| return counters.hashCode(); |
| } |
| |
| public synchronized void incrAllCounters(CounterGroup rightGroup) { |
| for(Counter right: rightGroup.counters.values()) { |
| Counter left = findCounter(right.getName(), right.getDisplayName()); |
| left.increment(right.getValue()); |
| } |
| } |
| } |