/usr/share/cruisecontrol-bin-2.6.1/projects/qpid-trunk/cpp/src/qpid/broker/Consumer.h

00001 /*
00002  *
00003  * Licensed to the Apache Software Foundation (ASF) under one
00004  * or more contributor license agreements.  See the NOTICE file
00005  * distributed with this work for additional information
00006  * regarding copyright ownership.  The ASF licenses this file
00007  * to you under the Apache License, Version 2.0 (the
00008  * "License"); you may not use this file except in compliance
00009  * with the License.  You may obtain a copy of the License at
00010  * 
00011  *   http://www.apache.org/licenses/LICENSE-2.0
00012  * 
00013  * Unless required by applicable law or agreed to in writing,
00014  * software distributed under the License is distributed on an
00015  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
00016  * KIND, either express or implied.  See the License for the
00017  * specific language governing permissions and limitations
00018  * under the License.
00019  *
00020  */
00021 #ifndef _Consumer_
00022 #define _Consumer_
00023 
00024 namespace qpid {
00025     namespace broker {
00026                 class Queue;
00027 }}
00028 
00029 #include "Message.h"
00030 
00031 namespace qpid {
00032     namespace broker {
00033 
00034         struct QueuedMessage
00035         {
00036             boost::intrusive_ptr<Message> payload;
00037             framing::SequenceNumber position;
00038             Queue* queue;
00039                         
00040             QueuedMessage(Queue* q, boost::intrusive_ptr<Message> msg, framing::SequenceNumber sn) : 
00041                                        payload(msg), position(sn), queue(q) {}
00042             QueuedMessage(Queue* q) : queue(q) {}
00043         };
00044         
00045 
00046         class Consumer {
00047             const bool acquires;
00048         public:
00049             typedef shared_ptr<Consumer> ptr;            
00050 
00051             framing::SequenceNumber position;
00052 
00053             Consumer(bool preAcquires = true) : acquires(preAcquires) {}
00054             bool preAcquires() const { return acquires; }
00055             virtual bool deliver(QueuedMessage& msg) = 0;
00056             virtual void notify() = 0;
00057             virtual bool filter(boost::intrusive_ptr<Message>) { return true; }
00058             virtual bool accept(boost::intrusive_ptr<Message>) { return true; }
00059             virtual ~Consumer(){}
00060         };
00061     }
00062 }
00063 
00064 
00065 #endif

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