The Research And Implementation Of Process Execution States Mechanism In BCSEP

Recently, with the prosperity of web services on the web, the individual and simply web services can't meet the actual application need. The technique of Web Services Composition can compose the available services based on certain business logic which makes the composed one achieve more powerful and more complete business functions. The execution monitor of most currently existing service composition execution platforms is the crucial part of the service composition execution platform. The execution modeling, model modification and optimization as well as execution deployment management depend on monitored data.In light of current situation, our researching team proposes a business service model and composite service execution platform based on business service, which provides a quick construction enterprise application platform based on the encapsulation of Web service in the business domain level. The thesis covers the research on the tracing mechanism of process execution states and the implementation of monitoring management of the execution process in the service composition execution platform based on business service. The thesis proposes the application of the monitoring mechanism in workflow to service composition execution platform by using the mapping from service composition model to BPEL. According to the conflicts between service composition model and BPEL, The thesis decomposes the procedure into three phases:service composition to BS-BPEL, BS-BPEL execution states configuration and BS-BPEL to BPEL, using BS-BPEL as a medium model. Process execution monitor complete the tracing of the execution states by this three phases. By analyzing experimental results and business service instances execution time, the thesis also proposes the anticipant of exception based on execution time, to alleviate the effect on the execution result caused by exceptions, and improve the monitor's ability.With the foundation of process execution tracing mechanism, the thesis provides the design and implementation of the process execution monitor. The monitor covers the features of business process of composite service based on business service, takes the workflow structural model and provides the process execution states to operators by graphical user interface, by which the operators could perform modifications and amendatory according to the real time execution state.