| /* |
| * 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 _ACTIVEMQ_UTIL_LONGSEQUENCEGENERATOR_H_ |
| #define _ACTIVEMQ_UTIL_LONGSEQUENCEGENERATOR_H_ |
| |
| #include <activemq/util/Config.h> |
| #include <decaf/util/concurrent/Mutex.h> |
| |
| namespace activemq { |
| namespace util { |
| |
| /** |
| * This class is used to generate a sequence of long long values that |
| * are incremented each time a new value is requested. This class is |
| * thread safe so the ids can be requested in different threads safely. |
| */ |
| class AMQCPP_API LongSequenceGenerator { |
| private: |
| |
| long long lastSequenceId; |
| decaf::util::concurrent::Mutex mutex; |
| |
| public: |
| |
| LongSequenceGenerator(); |
| virtual ~LongSequenceGenerator(); |
| |
| /** |
| * @return the next id in the sequence. |
| */ |
| long long getNextSequenceId(); |
| |
| /** |
| * @return the last id that was generated. |
| */ |
| long long getLastSequenceId(); |
| |
| }; |
| |
| }} |
| |
| #endif /*_ACTIVEMQ_UTIL_LONGSEQUENCEGENERATOR_H_*/ |