Iostat.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.text.SimpleDateFormat;
import java.util.Date;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
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 Iostat extends AbstractProcessor {
  static Logger log = Logger.getLogger(Iostat.class);
  public final String recordType = this.getClass().getName();

  private static String regex = "([0-9]{4}-[0-9]{2}-[0-9]{2} [0-9]{2}:[0-9]{2}:[0-9]{2},[0-9]{3}) (.*?) (.*?): (.*?) \\((.*?)\\)";
  private static Pattern p = null;

  private Matcher matcher = null;
  private SimpleDateFormat sdf = null;

  public Iostat() {
    // TODO move that to config
    sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm");
    p = Pattern.compile(regex);
  }

  @Override
  protected void parse(String recordEntry,
      OutputCollector<ChukwaRecordKey, ChukwaRecord> output, Reporter reporter)
      throws Throwable {

    log.debug("Iostat record: [" + recordEntry + "] type["
        + chunk.getDataType() + "]");
    int i = 0;

    matcher = p.matcher(recordEntry);
    while (matcher.find()) {
      log.debug("Iostat Processor Matches");

      try {
        Date d = sdf.parse(matcher.group(1).trim());

        String[] lines = recordEntry.split("\n");
        String[] headers = null;
        for (int skip = 0; skip < 2; skip++) {
          i++;
          while (i < lines.length && lines[i].indexOf("avg-cpu") < 0) {
            // Skip the first output because the numbers are averaged from
            // system boot up
            log.debug("skip line:" + lines[i]);
            i++;
          }
        }
        while (i < lines.length) {
          ChukwaRecord record = null;

          if (lines[i].indexOf("avg-cpu") >= 0
              || lines[i].indexOf("Device") >= 0) {
            headers = parseHeader(lines[i]);
            i++;
          }
          String data[] = parseData(lines[i]);
          if (headers[0].equals("avg-cpu:")) {
            log.debug("Matched CPU-Utilization");
            record = new ChukwaRecord();
            key = new ChukwaRecordKey();
            buildGenericRecord(record, null, d.getTime(), "SystemMetrics");
          } else if (headers[0].equals("Device:")) {
            log.debug("Matched Iostat");
            record = new ChukwaRecord();
            key = new ChukwaRecordKey();
            buildGenericRecord(record, null, d.getTime(), "SystemMetrics");
          } else {
            log.debug("No match:" + headers[0]);
          }
          if (record != null) {
            int j = 0;
            log.debug("Data Length: " + data.length);
            while (j < data.length) {
              log.debug("header:" + headers[j] + " data:" + data[j]);
              if (!headers[j].equals("avg-cpu:")) {
                try {
                  // Filter out overflow values for older linux systems
                  long x=Long.parseLong(data[j]);
                  if(x<100000000000L) {
                    record.add(headers[j],data[j]);
                  }
                } catch(NumberFormatException ex) {
                  record.add(headers[j],data[j]);
                }
              }
              j++;
            }
            record.setTime(d.getTime());
            if (data.length > 3) {
              output.collect(key, record);
            }
          }
          i++;
        }
        // End of parsing
      } catch (Exception e) {
        e.printStackTrace();
        throw e;
      }
    }
  }

  public String[] parseHeader(String header) {
    String[] headers = header.split("\\s+");
    return headers;
  }

  public String[] parseData(String dataLine) {
    String[] data = dataLine.split("\\s+");
    return data;
  }

  public String getDataType() {
    return recordType;
  }
}