Design and Implementation of data trigger module in workflow system
Liu Jin-gang · Jisuanji gongcheng yu sheji · 2009
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 cor-relations 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.