/*
    * 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.comm.netty.handler;
  
  /**
   * Simple immutable object to use for tracking requests uniquely.  This
   * object is guaranteed to be unique for a given client (based on the
   * destination task and the request).
   */
  public class ClientRequestId {
    /** Destination task id */
    private final int destinationTaskId;
    /** Request id */
    private final long requestId;
  
    /**
     * Constructor.
     *
     * @param destinationTaskId Destination task id
     * @param requestId Request id
     */
    public ClientRequestId(int destinationTaskId, long requestId) {
      this.destinationTaskId = destinationTaskId;
      this.requestId = requestId;
    }
  
    public int getDestinationTaskId() {
      return destinationTaskId;
    }
  
    public long getRequestId() {
      return requestId;
    }
  
    @Override
    public int hashCode() {
      return (29 * destinationTaskId) + (int) (57 * requestId);
    }
  
    @Override
    public boolean equals(Object other) {
      if (other instanceof ClientRequestId) {
        ClientRequestId otherObj = (ClientRequestId) other;
        if (otherObj.getRequestId() == requestId &&
            otherObj.getDestinationTaskId() == destinationTaskId) {
          return true;
        }
      }
  
      return false;
    }
  
    @Override
    public String toString() {
      return "(destTask=" + destinationTaskId + ",reqId=" + requestId + ")";
    }
  }