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10th Asia-Pacific Software Engineering Conference (APSEC'03)
Implementing Exception Handling Policies for Workflow Management System
Chiang Mai, Thailand
December 10-December 12
ISBN: 0-7695-2011-1
Jinmiao Li, Concordia University, Montreal, Canada
Yun Mai, Concordia University, Montreal, Canada
Greg Butler, Concordia University, Montreal, Canada
Exceptions are deviations from the normal execution of the program. They occur frequently in programs. In modern programming languages exceptions are separated from the normal execution using try-catch blocks and whenever an exception is raised then the catch blocks either recover from the exception in some way, or log the exception and abort. A workflow can be characterized as a long-running process. Exceptions occur in workflows but it is more expensive to abort the workflow as much work may be lost. Many proposals for describing workflows have been made. Some address exception handling, but few of these cleanly separate the description of the normal workflow from exceptions, and non present clear implementation details. Our approach to modeling and handling exceptions relies on continuations, listeners as exception handlers, and on policies, or strategies, for continuation. This model leads to a very flexible design behind the implementation in this paper. Our work has been validated in a small prototype written in Java, though our approach and design are independent of the programming language.
Citation:
Jinmiao Li, Yun Mai, Greg Butler, "Implementing Exception Handling Policies for Workflow Management System," apsec, pp.564, 10th Asia-Pacific Software Engineering Conference (APSEC'03), 2003
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