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Diffstat (limited to 'cpp/broker/inc/QueueRegistry.h')
-rw-r--r-- | cpp/broker/inc/QueueRegistry.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/cpp/broker/inc/QueueRegistry.h b/cpp/broker/inc/QueueRegistry.h new file mode 100644 index 0000000000..ac12aa8f88 --- /dev/null +++ b/cpp/broker/inc/QueueRegistry.h @@ -0,0 +1,88 @@ +/* + * + * Copyright (c) 2006 The Apache Software Foundation + * + * Licensed 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 _QueueRegistry_ +#define _QueueRegistry_ + +#include <map> +#include "MonitorImpl.h" +#include "Queue.h" + +namespace qpid { +namespace broker { + +class SessionHandlerImpl; + +/** + * A registry of queues indexed by queue name. + * + * Queues are reference counted using shared_ptr to ensure that they + * are deleted when and only when they are no longer in use. + * + */ +class QueueRegistry{ + + public: + QueueRegistry(); + ~QueueRegistry(); + + /** + * Declare a queue. + * + * @return The queue and a boolean flag which is true if the queue + * was created by this declare call false if it already existed. + */ + std::pair<Queue::shared_ptr, bool> declare(const string& name, bool durable = false, u_int32_t autodelete = 0, const ConnectionToken* const owner = 0); + + /** + * Destroy the named queue. + * + * Note: if the queue is in use it is not actually destroyed until + * all shared_ptrs to it are destroyed. During that time it is + * possible that a new queue with the same name may be + * created. This should not create any problems as the new and + * old queues exist independently. The registry has + * forgotten the old queue so there can be no confusion for + * subsequent calls to find or declare with the same name. + * + */ + void destroy(const string& name); + + /** + * Find the named queue. Return 0 if not found. + */ + Queue::shared_ptr find(const string& name); + + /** + * Generate unique queue name. + */ + string generateName(); + + private: + typedef std::map<string, Queue::shared_ptr> QueueMap; + QueueMap queues; + qpid::concurrent::MonitorImpl lock; + int counter; + +}; + + +} +} + + +#endif |