| /** |
| * 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.contrib.utils.join; |
| |
| import java.util.SortedMap; |
| import java.util.TreeMap; |
| import java.util.Map.Entry; |
| import java.util.Iterator; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.mapred.JobConf; |
| import org.apache.hadoop.mapred.Mapper; |
| import org.apache.hadoop.mapred.Reducer; |
| |
| /** |
| * A common base implementing some statics collecting mechanisms that are |
| * commonly used in a typical map/reduce job. |
| * |
| */ |
| public abstract class JobBase implements Mapper, Reducer { |
| |
| public static final Log LOG = LogFactory.getLog("datajoin.job"); |
| |
| private SortedMap<Object, Long> longCounters = null; |
| |
| private SortedMap<Object, Double> doubleCounters = null; |
| |
| /** |
| * Set the given counter to the given value |
| * |
| * @param name |
| * the counter name |
| * @param value |
| * the value for the counter |
| */ |
| protected void setLongValue(Object name, long value) { |
| this.longCounters.put(name, Long.valueOf(value)); |
| } |
| |
| /** |
| * Set the given counter to the given value |
| * |
| * @param name |
| * the counter name |
| * @param value |
| * the value for the counter |
| */ |
| protected void setDoubleValue(Object name, double value) { |
| this.doubleCounters.put(name, new Double(value)); |
| } |
| |
| /** |
| * |
| * @param name |
| * the counter name |
| * @return return the value of the given counter. |
| */ |
| protected Long getLongValue(Object name) { |
| return this.longCounters.get(name); |
| } |
| |
| /** |
| * |
| * @param name |
| * the counter name |
| * @return return the value of the given counter. |
| */ |
| protected Double getDoubleValue(Object name) { |
| return this.doubleCounters.get(name); |
| } |
| |
| /** |
| * Increment the given counter by the given incremental value If the counter |
| * does not exist, one is created with value 0. |
| * |
| * @param name |
| * the counter name |
| * @param inc |
| * the incremental value |
| * @return the updated value. |
| */ |
| protected Long addLongValue(Object name, long inc) { |
| Long val = this.longCounters.get(name); |
| Long retv = null; |
| if (val == null) { |
| retv = Long.valueOf(inc); |
| } else { |
| retv = Long.valueOf(val.longValue() + inc); |
| } |
| this.longCounters.put(name, retv); |
| return retv; |
| } |
| |
| /** |
| * Increment the given counter by the given incremental value If the counter |
| * does not exist, one is created with value 0. |
| * |
| * @param name |
| * the counter name |
| * @param inc |
| * the incremental value |
| * @return the updated value. |
| */ |
| protected Double addDoubleValue(Object name, double inc) { |
| Double val = this.doubleCounters.get(name); |
| Double retv = null; |
| if (val == null) { |
| retv = new Double(inc); |
| } else { |
| retv = new Double(val.doubleValue() + inc); |
| } |
| this.doubleCounters.put(name, retv); |
| return retv; |
| } |
| |
| /** |
| * log the counters |
| * |
| */ |
| protected void report() { |
| LOG.info(getReport()); |
| } |
| |
| /** |
| * log the counters |
| * |
| */ |
| protected String getReport() { |
| StringBuffer sb = new StringBuffer(); |
| |
| Iterator iter = this.longCounters.entrySet().iterator(); |
| while (iter.hasNext()) { |
| Entry e = (Entry) iter.next(); |
| sb.append(e.getKey().toString()).append("\t").append(e.getValue()) |
| .append("\n"); |
| } |
| iter = this.doubleCounters.entrySet().iterator(); |
| while (iter.hasNext()) { |
| Entry e = (Entry) iter.next(); |
| sb.append(e.getKey().toString()).append("\t").append(e.getValue()) |
| .append("\n"); |
| } |
| return sb.toString(); |
| } |
| |
| /** |
| * Initializes a new instance from a {@link JobConf}. |
| * |
| * @param job |
| * the configuration |
| */ |
| public void configure(JobConf job) { |
| this.longCounters = new TreeMap<Object, Long>(); |
| this.doubleCounters = new TreeMap<Object, Double>(); |
| } |
| } |