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.util;
  
  import java.io.File;
  
  import org.apache.hadoop.conf.Configuration;
  import org.apache.hadoop.fs.Path;
  import org.apache.log4j.Logger;
  
  /*
   * Create a common set of utility classes for code reuse
   */
  
  public class ChukwaUtil {
  
    private static Logger log = Logger.getLogger(ChukwaUtil.class);
  
    public static Configuration readConfiguration() {
      Configuration conf = new Configuration();
  
      String chukwaHomeName = System.getenv("CHUKWA_HOME");
      if (chukwaHomeName == null) {
        chukwaHomeName = "";
      }
      File chukwaHome = new File(chukwaHomeName).getAbsoluteFile();
  
      log.info("Config - CHUKWA_HOME: [" + chukwaHome.toString() + "]");
  
      String chukwaConfName = System.getProperty("CHUKWA_CONF_DIR");
      File chukwaConf;
      if (chukwaConfName != null)
        chukwaConf = new File(chukwaConfName).getAbsoluteFile();
      else
        chukwaConf = new File(chukwaHome, "conf");
  
      log.info("Config - CHUKWA_CONF_DIR: [" + chukwaConf.toString() + "]");
      File agentConf = new File(chukwaConf, "chukwa-agent-conf.xml");
      conf.addResource(new Path(agentConf.getAbsolutePath()));
      if (conf.get("chukwaAgent.checkpoint.dir") == null)
        conf.set("chukwaAgent.checkpoint.dir",
            new File(chukwaHome, "var").getAbsolutePath());
      conf.set("chukwaAgent.initial_adaptors", new File(chukwaConf,
          "initial_adaptors").getAbsolutePath());
      try {
        Configuration chukwaAgentConf = new Configuration(false);
        chukwaAgentConf.addResource(new Path(agentConf.getAbsolutePath()));
      } catch (Exception e) {
        e.printStackTrace();
      }
      return conf;
    }
  
  }
  