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Synchronization of Concurrent Workflows Using Interaction Expressions and Coordination Protocols


Christian Heinlein

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Abstract

Current workflow management systems, whether they are commercial products or research prototypes, do not provide adequate means for inter-workflow coordination as concurrently executing workflows are considered completely independent. As this simplified view is not sufficient for many real-world application scenarios, interaction expressions and graphs have been developed as a simple yet powerful formalism for the specification and implementation of synchronization conditions in general and inter-workflow dependencies in particular.In this paper,different coordination protocols as well as an accompanying subscription protocol are introduced as a means to actually employ interaction expressions to efficiently synchronize concurrent workflows.


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