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 org.apache.spark.network.buffer.ManagedBuffer;
  
  /**
   * Abstract class for messages which optionally contain a body kept in a separate buffer.
   */
  public abstract class AbstractMessage implements Message {
    private final ManagedBuffer body;
    private final boolean isBodyInFrame;
  
    protected AbstractMessage() {
      this(null, false);
    }
  
    protected AbstractMessage(ManagedBuffer body, boolean isBodyInFrame) {
      this.body = body;
      this.isBodyInFrame = isBodyInFrame;
    }
  
    @Override
    public ManagedBuffer body() {
      return body;
    }
  
    @Override
    public boolean isBodyInFrame() {
      return isBodyInFrame;
    }
  
    protected boolean equals(AbstractMessage other) {
      return isBodyInFrame == other.isBodyInFrame && Objects.equal(body, other.body);
    }
  
  }
  