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.spark.network.protocol;
  
  import com.google.common.base.Objects;
  import io.netty.buffer.ByteBuf;
  
  /**
  * Encapsulates a request for a particular chunk of a stream.
  */
  public final class StreamChunkId implements Encodable {
    public final long streamId;
    public final int chunkIndex;
  
    public StreamChunkId(long streamId, int chunkIndex) {
      this.streamId = streamId;
      this.chunkIndex = chunkIndex;
    }
  
    @Override
    public int encodedLength() {
      return 8 + 4;
    }
  
    public void encode(ByteBuf buffer) {
      buffer.writeLong(streamId);
      buffer.writeInt(chunkIndex);
    }
  
    public static StreamChunkId decode(ByteBuf buffer) {
      assert buffer.readableBytes() >= 8 + 4;
      long streamId = buffer.readLong();
      int chunkIndex = buffer.readInt();
      return new StreamChunkId(streamId, chunkIndex);
    }
  
    @Override
    public int hashCode() {
      return Objects.hashCode(streamId, chunkIndex);
    }
  
    @Override
    public boolean equals(Object other) {
      if (other instanceof StreamChunkId) {
        StreamChunkId o = (StreamChunkId) other;
        return streamId == o.streamId && chunkIndex == o.chunkIndex;
      }
      return false;
    }
  
    @Override
    public String toString() {
      return Objects.toStringHelper(this)
        .add("streamId", streamId)
        .add("chunkIndex", chunkIndex)
        .toString();
    }
  }
  