The Research In Exception Handling Mechanism Of Workflow On Web Platform

With the development of network technology, the business process management systems are faced with numerous users or corporate alliance of diverse and distinct requirements in Internet. Based on the new traits of business process management, a more intelligent, agile, and flexible business process application mode is needed, the exception handling is the indispensable part in the business process management system. The discussion over the strategy and methods to handle the exceptions in the specified circumstance becomes the major concern in software industry. The fact is that the exception handling block is all over the system. It is too hard for the developer to know about the exception structure of the whole system. Then it will lead to the decline of efficiency in many cases. In addition, the lack of global exception handler in Java makes it ridiculous in the code. The same codes to handle the same exception happen in system so many times. The redundancy will surely result in the decline of the code's readability and the increase of system maintenance cost. Therefore it is academically important and spaciously promising to research on the technology and application of handling web platform exception .In this paper, Analyzed and summarized their benefits of exception handling from workflow exception handling methods, and object-oriented methods of analysis of strengths and weaknesses which lead to AOP (aspect-oriented programming). Also specify the idea of AOP and implementation mechanism, and then explained how to use its software development to the general steps. Web platforms and structures of the key technologies required for Ajax technology and Web services are also elaborated. For different types of abnormity used different treatment strategies. Through the studies of abnormal mechanism, it becomes more targeted. In regard to the defect of exception handling in the application of workflow products, a exception handling mechanism is established after combining Ajax and AOP. The tangled code and code-spread problems are then solved and the systematical abnormity is managed effectively to enhance the efficiency of development. A Web Services model, capable of handling exception, is proposed herein and related mechanism of exception monitoring is designed thereafter along with the strategy of exception handling to automatically measure and deal with the abnormity during the implementation of Web Services. And I show the advantages of the framework in comparison with traditional solution in terms of efficiency and performance.