Abstract

Web service flow engine is the core of the service assembling and cooperating system in volcano early warning data-shared platform. We design and realize a lightweight web service flow based on BPEL standard. It takes charge of parsing the service flow model constructed by users, checking-up the syntax and logic of the service flow file, constructing the basic elements of the given service flow, and then executing it according to the BPEL standard. Then the engine collects all the executing information and invoking results, at the same time it also supervises the execution of web services, managing the invocation of services. Finally it returns the results back to users. Experimental results show that our engine can work correctly, the time efficiency is high and the occupancy rate of system resources is nearly zero.

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