/*
    * 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.reducer;
  
  
  import java.io.IOException;
  import java.util.Iterator;
  import org.apache.hadoop.chukwa.extraction.engine.ChukwaRecord;
  import org.apache.hadoop.chukwa.extraction.engine.ChukwaRecordKey;
  import org.apache.hadoop.chukwa.extraction.engine.Record;
  import org.apache.hadoop.mapred.OutputCollector;
  import org.apache.hadoop.mapred.Reporter;
  import org.apache.log4j.Logger;
  
  public class JobLogHistoryReduceProcessor implements ReduceProcessor {
    static Logger log = Logger.getLogger(JobLogHistoryReduceProcessor.class);
  
    @Override
    public String getDataType() {
      return this.getClass().getName();
    }
  
    @Override
    public void process(ChukwaRecordKey key, Iterator<ChukwaRecord> values,
        OutputCollector<ChukwaRecordKey, ChukwaRecord> output, Reporter reporter) {
      try {
        String action = key.getKey();
        int count = 0;
  
        ChukwaRecord record = null;
        while (values.hasNext()) {
          record = values.next();
          if (record.containsField("START_TIME")) {
            count++;
          } else {
            count--;
          }
        }
        ChukwaRecordKey newKey = new ChukwaRecordKey();
        newKey.setKey("" + record.getTime());
        newKey.setReduceType("MSSRGraph");
        ChukwaRecord newRecord = new ChukwaRecord();
        newRecord.add(Record.tagsField, record.getValue(Record.tagsField));
        newRecord.setTime(record.getTime());
        newRecord.add("count", "" + count);
        newRecord.add("JOBID", record.getValue("JOBID"));
        if (action.indexOf("JobLogHist/Map/") >= 0) {
          newRecord.add("type", "MAP");
        } else if (action.indexOf("JobLogHist/SHUFFLE/") >= 0) {
          newRecord.add("type", "SHUFFLE");
        } else if (action.indexOf("JobLogHist/SORT/") >= 0) {
          newRecord.add("type", "SORT");
        } else if (action.indexOf("JobLogHist/REDUCE/") >= 0) {
          newRecord.add("type", "REDUCE");
        }
  
        output.collect(newKey, newRecord);
      } catch (IOException e) {
        log.warn("Unable to collect output in JobLogHistoryReduceProcessor ["
            + key + "]", e);
        e.printStackTrace();
      }
  
    }
  
  }