content: /*
   * 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.engine;
  
  
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import org.apache.hadoop.chukwa.Chunk;
  
  /**
   * Various utility methods.
   * 
   */
  public class RecordUtil {
    static Pattern clusterPattern = Pattern
        .compile("(.*)?cluster=\"(.*?)\"(.*)?");
  
    public static String getClusterName(Record record) {
      String tags = record.getValue(Record.tagsField);
      if (tags != null) {
        Matcher matcher = clusterPattern.matcher(tags);
        if (matcher.matches()) {
          return matcher.group(2);
        }
      }
  
      return "undefined";
    }
    /**
     * Uses a compiled pattern, so theoretically faster than
     * Chunk.getTag().
     * @param chunk - a chunk of binary blob
     * @return cluster name
     * 
     */
    public static String getClusterName(Chunk chunk) {
      String tags = chunk.getTags();
      if (tags != null) {
        Matcher matcher = clusterPattern.matcher(tags);
        if (matcher.matches()) {
          return matcher.group(2);
        }
      }
  
      return "undefined";
    }
    
  
  }
  