/*
 * 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.geode.distributed.internal;

import org.apache.geode.distributed.internal.membership.InternalDistributedMember;

/**
 * A marker interface that denotes {@link DistributionMessage}s that require a reply. Messages that
 * do not implement this interface can be sent asynchronously through the transport layer.
 *
 *
 * @since GemFire 3.0
 */
public interface MessageWithReply {

  /**
   * Returns the id of the {@link org.apache.geode.distributed.internal.ReplyProcessor21} that is
   * used to handle the reply to this message.
   */
  int getProcessorId();

  /**
   * Returns the id the sender who is waiting for a reply.
   */
  InternalDistributedMember getSender();
}