TAILIEUCHUNG - Enterprise service computing from concept_12

Các thành phần dịch vụ cam kết động cơ cần phải gọi dịch vụ enqueue từ hàng đợi phương pháp thành phần, và các thành phần dịch vụ nhà soạn nhạc cần phải gọi dịch vụ dequeue. Vì vậy, enqueue và dequeue dịch vụ đại diện là quá trình chuyển đổi nước ngoài. | 312 Zhang Chang Kim Figure 13. Unfolding interconnection net Figure 11 and Figure 12 show the interconnection nets of the service components commit engine and composer respectively. The commit-engine service component needs to invoke the enqueue service from the component method queue and the composer service component needs to invoke the dequeue service. Therefore the enqueue and dequeue services are represented as foreign transitions. Inscriptions for the foreign transitions show that they are calling enqueue and dequeue services from the service component message queue via SOAP. After specifying individual service components in terms of the interface nets and the interconnection nets we are ready to visualize the entire topological view of a system by interconnecting all of these WS-Net components. Firing a foreign transition means executing the corresponding service transition of the server component. Therefore connecting WS-Net components can be achieved by merging the ports of the client service components with the ports of the server service components after removing foreign transitions from the client service components. In our WS-Net we thus introduce a special kind of transition aiming at connecting ports. This transition is called a connector transition and it is named by a connector type. Figure Copyright 2007 Idea Group Inc. Copying or distributing in print or electronic forms without written permis- sion of Idea Group Inc. is prohibited. A Petri Net-Based Specification Model Towards Verifiable Service Computing 313 13 shows the connected interconnection net that describes the entire informationcommunication model by interconnecting the commit engine and the composer with the message queue using SOAP connectors. In summary such an interconnection mechanism can be applied across different levels of service-component diagrams. In detail interconnections can be visualized in two levels a interoperation nets of client-server service components and b the .

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