摘要
数据触发模块基于触发器和存储过程监视数据库数据变化信息,并将其映射成事件消息发送给工作流引擎,推动工作流实例的执行。详细分析了应用需求、数据变化信息与生产事件之间的相关性和映射关系,给出了总体模块设计。在具体实现中采用了层次化设计方法,通过数据备份机制保障触发效率及可靠性,通过统一化接口策略提高了模块的可扩展性,通过数据库查询优化提高了模块的运行效率。实际应用表明,该模块响应时间短,运行稳定,可靠性高。
The data trigger module presented watches the information of data change based on triggers and procedures, translates it into event messages and then they are sent to the workflow engine to drive the workflow instances. The application requirements, the correlations and mapping relations between the information of data change and the production events are analyzed in detail, and then the overall module design is given. Take advantage of many advanced technologies in specific implementation, such as hierarchical design, backup mechanism to guarantee the module＇s efficiency and reliability, unified interface strategy to improve the module＇s scala-bility, database query optimization to improve the module＇s efficiency, and so on. Practical application shows that the data trigger module has short response time, stable operation, high reliability.
出处
《计算机工程与设计》
CSCD
北大核心
2009年第8期2022-2025,共4页
Computer Engineering and Design
