/*
 *
 * 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.
 *
 */
#ifndef _Consumer_
#define _Consumer_

namespace qpid {
    namespace broker {
		class Queue;
}}

#include "Message.h"

namespace qpid {
    namespace broker {

        struct QueuedMessage
        {
            boost::intrusive_ptr<Message> payload;
            framing::SequenceNumber position;
            Queue* queue;
			
            QueuedMessage(Queue* q, boost::intrusive_ptr<Message> msg, framing::SequenceNumber sn) : 
			               payload(msg), position(sn), queue(q) {}
            QueuedMessage(Queue* q) : queue(q) {}
        };
        

        class Consumer {
            const bool acquires;
        public:
            typedef shared_ptr<Consumer> ptr;            

            framing::SequenceNumber position;

            Consumer(bool preAcquires = true) : acquires(preAcquires) {}
            bool preAcquires() const { return acquires; }
            virtual bool deliver(QueuedMessage& msg) = 0;
            virtual void notify() = 0;
            virtual bool filter(boost::intrusive_ptr<Message>) { return true; }
            virtual bool accept(boost::intrusive_ptr<Message>) { return true; }
            virtual ~Consumer(){}
        };
    }
}


#endif