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.celeborn.common.network.protocol;
  
  import java.util.Objects;
  
  import io.netty.buffer.ByteBuf;
  
  import org.apache.celeborn.common.network.buffer.ManagedBuffer;
  import org.apache.celeborn.common.network.buffer.NettyManagedBuffer;
  
  /** Response to {@link RpcRequest} for a successful RPC. */
  public final class RpcResponse extends ResponseMessage {
    public final long requestId;
  
    public RpcResponse(long requestId, ManagedBuffer message) {
      super(message);
      this.requestId = requestId;
    }
  
    @Override
    public Type type() {
      return Type.RPC_RESPONSE;
    }
  
    @Override
    public int encodedLength() {
      // The integer (a.k.a. the body size) is not really used, since that information is already
      // encoded in the frame length. But this maintains backwards compatibility with versions of
      // RpcRequest that use Encoders.ByteArrays.
      return 8 + 4;
    }
  
    @Override
    public void encode(ByteBuf buf) {
      buf.writeLong(requestId);
      // See comment in encodedLength().
      buf.writeInt((int) body().size());
    }
  
    @Override
    public ResponseMessage createFailureResponse(String error) {
      return new RpcFailure(requestId, error);
    }
  
    public static RpcResponse decode(ByteBuf buf) {
      return decode(buf, true);
    }
  
    public static RpcResponse decode(ByteBuf buf, boolean decodeBody) {
      long requestId = buf.readLong();
      // See comment in encodedLength().
      buf.readInt();
      if (decodeBody) {
        return new RpcResponse(requestId, new NettyManagedBuffer(buf));
      } else {
        return new RpcResponse(requestId, NettyManagedBuffer.EmptyBuffer);
      }
    }
  
    @Override
    public int hashCode() {
      return Objects.hash(requestId, body());
    }
  
    @Override
    public boolean equals(Object other) {
      if (other instanceof RpcResponse) {
        RpcResponse o = (RpcResponse) other;
        return requestId == o.requestId && super.equals(o);
      }
      return false;
    }
  
    @Override
    public String toString() {
      return "RpcResponse[requestId=" + requestId + ",body=" + body() + "]";
    }
  }
  