TY - GEN
T1 - Extending BPEL for run time adaptability
AU - Karastoyanova, Dimka
AU - Houspanossian, Alejandro
AU - Cilia, Mariano
AU - Leymann, Frank
AU - Buchmann, Alejandro
PY - 2005
Y1 - 2005
N2 - The existing Web Service Flow (WS-flow) technologies enable both static and dynamic binding of participating Web services (WSs) on the process model level. Adaptability on per-instance basis is not sufficiently supported and therefore must be addressed to improve process flexibility upon changes in the environment. Ad-hoc process instance changes can be enabled by swapping participating WS instances, by modifying port Types of the partners to be invoked, and by changing process logic. In this work we address the problem of dynamic binding of WSs to WS-flow instances at run time, i.e. the ability to exchange a WS instance participating in a WS-flow instance with an alternative one. The problem is additionally complicated by the fact that the execution of a process depends on its deployment. We describe the "find and bind" mechanism, and we show its representation as a BPEL extension. We discuss the benefits that could be gained and the disadvantages it brings in. The mechanism extends and improves the existing process technologies. It facilitates a precisely controlled policy-based selection of WSs at run time and also provides for process instance repair, while maintaining simplicity. We also discuss a prototypical implementation of the presented functionality.
AB - The existing Web Service Flow (WS-flow) technologies enable both static and dynamic binding of participating Web services (WSs) on the process model level. Adaptability on per-instance basis is not sufficiently supported and therefore must be addressed to improve process flexibility upon changes in the environment. Ad-hoc process instance changes can be enabled by swapping participating WS instances, by modifying port Types of the partners to be invoked, and by changing process logic. In this work we address the problem of dynamic binding of WSs to WS-flow instances at run time, i.e. the ability to exchange a WS instance participating in a WS-flow instance with an alternative one. The problem is additionally complicated by the fact that the execution of a process depends on its deployment. We describe the "find and bind" mechanism, and we show its representation as a BPEL extension. We discuss the benefits that could be gained and the disadvantages it brings in. The mechanism extends and improves the existing process technologies. It facilitates a precisely controlled policy-based selection of WSs at run time and also provides for process instance repair, while maintaining simplicity. We also discuss a prototypical implementation of the presented functionality.
UR - https://www.scopus.com/pages/publications/33749378578
U2 - 10.1109/EDOC.2005.14
DO - 10.1109/EDOC.2005.14
M3 - Conference contribution
AN - SCOPUS:33749378578
SN - 0769524419
SN - 9780769524412
T3 - Proceedings - IEEE International Enterprise Distributed Object Computing Workshop, EDOC
SP - 15
EP - 26
BT - Proceedings - Ninth IEEE International EDOC Enterprise Computing Conference 2005
PB - IEEE
T2 - 9th IEEE International EDOC Enterprise Computing Conference 2005
Y2 - 19 September 2005 through 23 September 2005
ER -