/**
 * 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.hdt.core.cluster;

import java.util.HashMap;
import java.util.Map;

import org.apache.hadoop.conf.Configuration;

public enum ConfProp {
  /**
   * Property name for the Hadoop location name
   */
  PI_LOCATION_NAME(true, "location.name", "New Hadoop location"),

  /**
   * Property name for the master host name (the Job tracker)
   */
  PI_JOB_TRACKER_HOST(true, "jobtracker.host", "localhost"),

  /**
   * Property name for the DFS master host name (the Name node)
   */
  PI_NAME_NODE_HOST(true, "namenode.host", "localhost"),

  /**
   * Property name for the installation directory on the master node
   */
  // PI_INSTALL_DIR(true, "install.dir", "/dir/hadoop-version/"),
  /**
   * User name to use for Hadoop operations
   */
  PI_USER_NAME(true, "user.name", System.getProperty("user.name",
      "who are you?")),

  /**
   * Property name for SOCKS proxy activation
   */
  PI_SOCKS_PROXY_ENABLE(true, "socks.proxy.enable", "no"),

  /**
   * Property name for the SOCKS proxy host
   */
  PI_SOCKS_PROXY_HOST(true, "socks.proxy.host", "host"),

  /**
   * Property name for the SOCKS proxy port
   */
  PI_SOCKS_PROXY_PORT(true, "socks.proxy.port", "1080"),

  /**
   * TCP port number for the name node
   */
  PI_NAME_NODE_PORT(true, "namenode.port", "50040"),

  /**
   * TCP port number for the job tracker
   */
  PI_JOB_TRACKER_PORT(true, "jobtracker.port", "50020"),

  /**
   * Are the Map/Reduce and the Distributed FS masters hosted on the same
   * machine?
   */
  PI_COLOCATE_MASTERS(true, "masters.colocate", "yes"),

  /**
   * Property name for naming the job tracker (URI). This property is related
   * to {@link #PI_MASTER_HOST_NAME}
   */
  JOB_TRACKER_URI(false, "mapreduce.jobtracker.address", "localhost:50020"),

  /**
   * Property name for naming the default file system (URI).
   */
  FS_DEFAULT_URI(false, "fs.default.name", "hdfs://localhost:50040/"),

  /**
   * Property name for the default socket factory:
   */
  SOCKET_FACTORY_DEFAULT(false, "hadoop.rpc.socket.factory.class.default",
      "org.apache.hadoop.net.StandardSocketFactory"),

  /**
   * Property name for the SOCKS server URI.
   */
  SOCKS_SERVER(false, "hadoop.socks.server", "host:1080"),

  ;

  /**
   * Map <property name> -> ConfProp
   */
  private static Map<String, ConfProp> map;

  private static synchronized void registerProperty(String name,
      ConfProp prop) {

    if (ConfProp.map == null)
      ConfProp.map = new HashMap<String, ConfProp>();

    ConfProp.map.put(name, prop);
  }

  public static ConfProp getByName(String propName) {
    return map.get(propName);
  }

  public final String name;

  public final String defVal;

  ConfProp(boolean internal, String name, String defVal) {
    if (internal)
      name = "eclipse.plug-in." + name;
    this.name = name;
    this.defVal = defVal;

    ConfProp.registerProperty(name, this);
  }

  String get(Configuration conf) {
    return conf.get(name);
  }

  void set(Configuration conf, String value) {
    assert value != null;
    conf.set(name, value);
  }

}