/*
    * 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.giraph.graph;
  
  import org.apache.hadoop.io.Writable;
  
  import java.io.DataInput;
  import java.io.DataOutput;
  import java.io.IOException;
  import java.net.InetSocketAddress;
  
  /**
   * Abstract class for information about any task - worker or master.
   */
  public abstract class TaskInfo implements Writable {
    /** Task hostname */
    private String hostname;
    /** Port that the IPC server is using */
    private int port;
    /** Task partition id */
    private int taskId = -1;
    /** Task host IP */
    private String hostOrIp;
  
    /**
     * Constructor
     */
    public TaskInfo() {
    }
  
    /**
     * Get this task's hostname
     *
     * @return Hostname
     */
    public String getHostname() {
      return hostname.toLowerCase();
    }
  
    /**
     * Get this task's host address. Could be IP.
     *
     * @return host address
     */
    public String getHostOrIp() {
      return hostOrIp;
    }
  
    /**
     * Get port that the IPC server of this task is using
     *
     * @return Port
     */
    public int getPort() {
      return port;
    }
  
    /**
     * Set address that the IPC server of this task is using
     *
     * @param address Address
     * @param host host name or IP
     */
    public void setInetSocketAddress(InetSocketAddress address, String host) {
      this.port = address.getPort();
      this.hostname = address.getHostName();
      this.hostOrIp = host;
    }
  
    /**
     * Get a new instance of the InetSocketAddress for this hostname and port
     *
     * @return InetSocketAddress of the hostname and port.
     */
    public InetSocketAddress getInetSocketAddress() {
      return new InetSocketAddress(hostOrIp, port);
    }
  
    /**
     * Set task partition id of this task
     *
     * @param taskId partition id
     */
   public void setTaskId(int taskId) {
     this.taskId = taskId;
   }
 
   /**
    * Get task partition id of this task
    *
    * @return Task partition id of this task
    */
   public int getTaskId() {
     return taskId;
   }
 
   /**
    * Get hostname and task id
    *
    * @return Hostname and task id
    */
   public String getHostnameId() {
     return getHostname() + "_" + getTaskId();
   }
 
   @Override
   public boolean equals(Object other) {
     if (other instanceof TaskInfo) {
       TaskInfo taskInfo = (TaskInfo) other;
       if (getHostname().equals(taskInfo.getHostname()) &&
           getHostOrIp().equals(taskInfo.getHostOrIp()) &&
           (getTaskId() == taskInfo.getTaskId()) &&
           (port == taskInfo.getPort() &&
           (taskId == taskInfo.getTaskId()))) {
         return true;
       }
     }
     return false;
   }
 
   @Override
   public String toString() {
     return "hostname=" + getHostname() +
         " hostOrIp=" + getHostOrIp() +
         ", MRtaskID=" + getTaskId() +
         ", port=" + getPort();
   }
 
   @Override
   public void readFields(DataInput input) throws IOException {
     hostname = input.readUTF();
     hostOrIp = input.readUTF();
     port = input.readInt();
     taskId = input.readInt();
   }
 
   @Override
   public void write(DataOutput output) throws IOException {
     output.writeUTF(hostname);
     output.writeUTF(hostOrIp);
     output.writeInt(port);
     output.writeInt(taskId);
   }
 
   @Override
   public int hashCode() {
     int result = 17;
     result = 37 * result + getPort();
     result = 37 * result + hostname.hashCode();
     result = 37 * result + hostOrIp.hashCode();
     result = 37 * result + getTaskId();
     return result;
   }
 
 }