HadoopLogProcessor.java

/*
 * 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.chukwa.extraction.demux.processor.mapper;


import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.apache.hadoop.chukwa.extraction.engine.ChukwaRecord;
import org.apache.hadoop.chukwa.extraction.engine.ChukwaRecordKey;
import org.apache.hadoop.mapred.OutputCollector;
import org.apache.hadoop.mapred.Reporter;
import org.apache.log4j.Logger;

public class HadoopLogProcessor extends AbstractProcessor {
  static Logger log = Logger.getLogger(HadoopLogProcessor.class);

  private static final String recordType = "HadoopLog";
  private static final String nameNodeType = "NameNode";
  private static final String dataNodeType = "DataNode";
  private static final String auditType = "Audit";
  private SimpleDateFormat sdf = null;

  public HadoopLogProcessor() {
    // TODO move that to config
    sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss,SSS");
  }

  @Override
  public void parse(String recordEntry,
      OutputCollector<ChukwaRecordKey, ChukwaRecord> output, Reporter reporter)
      throws Throwable {
    try {
      String dStr = recordEntry.substring(0, 23);
      Date d = sdf.parse(dStr);
      ChukwaRecord record = new ChukwaRecord();

      if (this.chunk.getStreamName().indexOf("datanode") > 0) {
        buildGenericRecord(record, recordEntry, d.getTime(), dataNodeType);
      } else if (this.chunk.getStreamName().indexOf("namenode") > 0) {
        buildGenericRecord(record, recordEntry, d.getTime(), nameNodeType);
      } else if (this.chunk.getStreamName().indexOf("audit") > 0) {
        buildGenericRecord(record, recordEntry, d.getTime(), auditType);
      } else {
        buildGenericRecord(record, recordEntry, d.getTime(), recordType);
      }

      output.collect(key, record);
    } catch (ParseException e) {
      log.warn("Unable to parse the date in DefaultProcessor [" + recordEntry
          + "]", e);
      e.printStackTrace();
      throw e;
    } catch (IOException e) {
      log.warn("Unable to collect output in DefaultProcessor [" + recordEntry
          + "]", e);
      e.printStackTrace();
      throw e;
    }
  }

  public String getDataType() {
    return HadoopLogProcessor.recordType;
  }

}