Component Software: Beyond Object-Oriented Programming
Component Software: Beyond Object-Oriented Programming
JAC: A Flexible Solution for Aspect-Oriented Programming in Java
REFLECTION '01 Proceedings of the Third International Conference on Metalevel Architectures and Separation of Crosscutting Concerns
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Proceedings of the 2nd international conference on Service oriented computing
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ICWS '05 Proceedings of the IEEE International Conference on Web Services
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SEM'04 Proceedings of the 4th international conference on Software Engineering and Middleware
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International Journal of Web Engineering and Technology
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Proceedings of the 12th International Conference on Information Integration and Web-based Applications & Services
Policy-driven middleware for self-adaptation of web services compositions
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Data-bound variables for WS-BPEL executable processes
Computer Languages, Systems and Structures
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In recent years, several WS-* specifications have been proposed to address the middleware requirements of web services such as security, reliable messaging, and transactions. On the other hand side, BPEL is the upcoming standard for composing existing web services into more complex ones. In this paper, we look at the middleware requirements of web service compositions and specifically those specified in BPEL. We argue that the WS-* specifications such as WS-Security and WS-Reliability do not address these requirements appropriately. We introduce a framework for providing middleware support in BPEL engines based on a process container, which intercepts the execution of BPEL processes and calls dedicated middleware services to plug in support for security, persistence, reliable messaging, etc. The container is implemented as a lightweight container using AO4BPEL aspects and the middleware requirements of the process are specified in a deployment descriptor.