| /** |
| * 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.ambari.log4j.hadoop.mapreduce.jobhistory; |
| |
| import java.io.IOException; |
| import java.util.Queue; |
| import java.util.concurrent.LinkedBlockingQueue; |
| |
| import org.apache.ambari.log4j.common.LogParser; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.tools.rumen.Hadoop20JHParser; |
| import org.apache.hadoop.tools.rumen.JobHistoryParser; |
| import org.apache.hadoop.util.LineReader; |
| import org.apache.log4j.spi.LoggingEvent; |
| |
| public class MapReduceJobHistoryParser implements LogParser { |
| private JobHistoryParser parser; |
| private LogLineReader reader = new LogLineReader("Meta VERSION=\"1\" ."); |
| |
| public MapReduceJobHistoryParser() { |
| try { |
| parser = new Hadoop20JHParser(reader); |
| } catch (IOException ioe) { |
| // SHOULD NEVER HAPPEN! |
| throw new RuntimeException(ioe); |
| } |
| } |
| |
| @Override |
| public void addEventToParse(LoggingEvent event) { |
| reader.addLine(event.getMessage().toString()); |
| } |
| |
| @Override |
| public Object getParseResult() throws IOException { |
| return parser.nextEvent(); |
| } |
| |
| static class LogLineReader extends LineReader { |
| |
| private Queue<String> lines = new LinkedBlockingQueue<String>(); |
| |
| public LogLineReader(String line) { |
| super(null); |
| addLine(line); |
| } |
| |
| private void addLine(String line) { |
| lines.add(line); |
| } |
| |
| public int readLine(Text str) throws IOException { |
| String line = lines.poll(); |
| if (line != null) { |
| str.set(line); |
| return line.length(); |
| } |
| |
| return 0; |
| } |
| |
| public void close() throws IOException { |
| } |
| } |
| } |