Research On Code Migration Framework Based On Mobile Workflow

In recent years, with the rapid development and popularization of mobile equipment and awide range of wireless network, the traditional collaborative work and workflow system isfacing new problems and challenges in mobile network, especially task interaction and qualityof service of collaborative system in mobile environment. Therefore, how to combine thetraditional workflow system and mobile computing, and how to guarantee service quality andreliability in wireless network becomes hot research topic.To solve the problem, dynamic code migration between mobile device and server isproposed. In this way, service performance will be guaranteed even if wireless network isunreliable. Moreover, this architecture will take full advantage of mobile computing resourcesthat benefits load balance between client and server: while for unreliable and weak links,executing service components locally on the mobile device will ensure the normal operationof program, in situations of stable and high preferment client connectivity, servicecomponents could be executed at the server as usual. The main contents of this study are asfollows:(1)Put forward a task component migration framework based on mobile workflow. First,build task enterprise abstract model, with the help of related resources and services taskcomponent is built, and this task component could compose and reuse dynamically. Andthrough migration strategy based on environmental factors and process, the task componentcan migrate in complicated mobile environment and choose the best service position.Therefore, the proposed code component migration framework not only realize thecombination of the workflow system and mobile computing, and also overcome the influencethe on the quality of service of the unstable wireless connection. (2)Establish enterprise resource model and component model task based on the RESTarchitectural style. Through the recognition and extraction of task, resource and serviceinvolved in enterprise business processes, enterprise mission, enterprise resource andenterprise service model are built, and task code component is isolated. This task codecomponent can be bund to process node dynamically, in this way not only the reuse of thecomponents is realized, and also components can migrate between the client and the server atthe same time.(3)Through the study of environmental factors on the influence of the service, this paperestablishes environmental factor model for service component. Finally, with the help ofmarkov decision process component migration strategy is proposed.(4)With the help of B/S structure and HTML5standard, an off-line operationenvironment for service component in the browser environment is built. Through modelingand optimization of an enterprise approval process instance, the feasibility and validity of themobile computing code migration framework are verified.The realization of the prototype system and verification results show that the proposedcode component migration framework, which is designed to protect the quality of service andcontinuation of service process, provides a new development method.