An automatic self‐adaptation framework for service‐basedrnprocess based on exception handling

摘要

For service‐based process, there is a frequent failure when it runs under a loose‐coupled andrnuncertain environment, such as mobile Internet. The runtime self‐adaptation mechanism isrnurgently needed to automatically achieve the goal of a process. Therefore, this article presentsrna self‐adaptation framework to automatically monitor and self‐adapt to various failures. On thernbasis of the presented self‐adaptation exceptions framework, the service‐based process isrnautomatically extended with these exception definitions. In particular, the local self‐adaptationrnexceptions monitor the failures over each web service instance, whereas the global selfadaptationrnexceptions are designed to explore the process‐level failures. For each exception,rnthe self‐adaptation strategy is dynamically generated according to the running environment.rnFinally, we implement the prototype system running on the Apache ODE. The experimentalrnresults show that our framework can automatically recover a process instance from variousrnfailures, and the proposed approach can identify more failure types than previous works andrnapparently improve the running success rate of process instances.