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The ActiveMQ Message Broker and Client implementations
/**
* 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.activemq.command;
import org.apache.activemq.state.CommandVisitor;
/**
* The Command Pattern so that we can send and receive commands on the different
* transports
*
* @version $Revision: 1.7 $
*/
public interface Command extends DataStructure {
void setCommandId(int value);
/**
* @return the unique ID of this request used to map responses to requests
*/
int getCommandId();
void setResponseRequired(boolean responseRequired);
boolean isResponseRequired();
boolean isResponse();
boolean isMessageDispatch();
boolean isBrokerInfo();
boolean isWireFormatInfo();
boolean isMessage();
boolean isMessageAck();
boolean isMessageDispatchNotification();
boolean isShutdownInfo();
Response visit(CommandVisitor visitor) throws Exception;
/**
* The endpoint within the transport where this message came from which
* could be null if the transport only supports a single endpoint.
*/
Endpoint getFrom();
void setFrom(Endpoint from);
/**
* The endpoint within the transport where this message is going to - null
* means all endpoints.
*/
Endpoint getTo();
void setTo(Endpoint to);
}