| /** |
| * 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.tools.rumen; |
| |
| import java.text.ParseException; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Queue; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.mapreduce.Counters; |
| import org.apache.hadoop.mapreduce.jobhistory.HistoryEvent; |
| |
| abstract class HistoryEventEmitter { |
| static final private Log LOG = LogFactory.getLog(HistoryEventEmitter.class); |
| |
| abstract List<SingleEventEmitter> nonFinalSEEs(); |
| |
| abstract List<SingleEventEmitter> finalSEEs(); |
| |
| protected HistoryEventEmitter() { |
| // no code |
| } |
| |
| enum PostEmitAction { |
| NONE, REMOVE_HEE |
| }; |
| |
| final Pair<Queue<HistoryEvent>, PostEmitAction> emitterCore(ParsedLine line, |
| String name) { |
| Queue<HistoryEvent> results = new LinkedList<HistoryEvent>(); |
| PostEmitAction removeEmitter = PostEmitAction.NONE; |
| for (SingleEventEmitter see : nonFinalSEEs()) { |
| HistoryEvent event = see.maybeEmitEvent(line, name, this); |
| if (event != null) { |
| results.add(event); |
| } |
| } |
| for (SingleEventEmitter see : finalSEEs()) { |
| HistoryEvent event = see.maybeEmitEvent(line, name, this); |
| if (event != null) { |
| results.add(event); |
| removeEmitter = PostEmitAction.REMOVE_HEE; |
| break; |
| } |
| } |
| return new Pair<Queue<HistoryEvent>, PostEmitAction>(results, removeEmitter); |
| } |
| |
| protected static Counters maybeParseCounters(String counters) { |
| try { |
| return parseCounters(counters); |
| } catch (ParseException e) { |
| LOG.warn("The counter string, \"" + counters + "\" is badly formatted."); |
| return null; |
| } |
| } |
| |
| protected static Counters parseCounters(String counters) |
| throws ParseException { |
| if (counters == null) { |
| LOG.warn("HistoryEventEmitters: null counter detected:"); |
| return null; |
| } |
| |
| counters = counters.replace("\\.", "\\\\."); |
| counters = counters.replace("\\\\(", "\\("); |
| counters = counters.replace("\\\\)", "\\)"); |
| counters = counters.replace("\\\\[", "\\["); |
| counters = counters.replace("\\\\]", "\\]"); |
| |
| org.apache.hadoop.mapred.Counters depForm = |
| org.apache.hadoop.mapred.Counters.fromEscapedCompactString(counters); |
| |
| return new Counters(depForm); |
| } |
| } |