| Publisher | Darmstadt University of Technology | ||
|---|---|---|---|
| Format | 204.3KB PDF | Date added | 20 Jul 2006 |
| Topics | Programming Languages, Groupware - Workflow, Middleware | ||
| Downloads | 13 | ||
This paper focuses on middleware concerns in BPEL workflows. When looking at those workflows from the implementation perspective, we observe that they have several BPEL-specific middleware requirements, which are not supported by current WS- specifications and by most BPEL engines available to date. This demo paper will show the AO4BPEL Engine, which implements a container framework that allows the specification and enforcement of middleware requirements in BPEL processes. A deployment descriptor is used to specify the quality of service requirements of BPEL activities. A light-weight and aspect-based process container is used to enforce those requirements by calling dedicated middleware Web Services. The paper implemented those middleware Web Services by extending open source implementations of WS- specifications for security, reliable messaging, and transactions.
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