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;
  
  /** Response to {@link RpcRequest} for a failed RPC. */
  public final class RpcFailure extends AbstractMessage implements ResponseMessage {
    public final long requestId;
    public final String errorString;
  
    public RpcFailure(long requestId, String errorString) {
      this.requestId = requestId;
      this.errorString = errorString;
    }
  
    @Override
    public Type type() { return Type.RpcFailure; }
  
    @Override
    public int encodedLength() {
      return 8 + Encoders.Strings.encodedLength(errorString);
    }
  
    @Override
    public void encode(ByteBuf buf) {
      buf.writeLong(requestId);
      Encoders.Strings.encode(buf, errorString);
    }
  
    public static RpcFailure decode(ByteBuf buf) {
      long requestId = buf.readLong();
      String errorString = Encoders.Strings.decode(buf);
      return new RpcFailure(requestId, errorString);
    }
  
    @Override
    public int hashCode() {
      return Objects.hashCode(requestId, errorString);
    }
  
    @Override
    public boolean equals(Object other) {
      if (other instanceof RpcFailure) {
        RpcFailure o = (RpcFailure) other;
        return requestId == o.requestId && errorString.equals(o.errorString);
      }
      return false;
    }
  
    @Override
     public String toString() {
      return Objects.toStringHelper(this)
        .add("requestId", requestId)
        .add("errorString", errorString)
        .toString();
    }
  }
  