| 摘要(英) |
Due to the raise of the Internet, the development of web services has
become essential. Except for simple web services, the need of composite
services starts to increase. The composing methods used in existing
composite service technologies are mostly static, so it can not change
while the network environment changes. Current composite service
technologies always perform the same action to complete the composite
service regardless of the user needs. In addition to web services, agent
services have also attracted an increasing attention, but present composite
service technologies usually focus on a single kind of service and can not
compose different kinds of services. In this paper, we proposed a
framework for composite service agents under PPN(Probabilistic
Petri-Net)-based MAS(Multi-Agent Systems) which integrates
SOA(Service Oriented Architecture). We extend the Contract Net
Protocol to make contracts with services. When a user sends a request to
the composite service agent, it will query PPN-based middle agent to find
matched services for composing services. We also extends BPEL4WS
engine to BPEL4WS/AS engine that can be used to compose both web
services and agent services. |
| 參考文獻 |
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HPL-2000-36, March, 2000 |
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