Research On Smart Client Service-Oriented Distributed Application Model

Over the past several years, some interesting changes have taken place in ways ofbuilding, deploying and using of the software. Not long ago, client/server technologywhich, also called thick clients or fat clients, is in fashions. With the appearance ofInternet, the thin client mode has been introduced. With the arrival of .NET, we can utilizesmart client technology while building and deploying the application now. While smartclients provide the benefits of a rich client model with thin client manageability, they alsoprovide much more flexibility than the traditional rich client applications. By using .NET Framework, XML Web Service, Smart Client, Design Patterns,Distributed mode through fully utilizing service-oriented architecture, we build an adaptable,evolutional, maintainable application framework. This Smart Client Service-OrientedDistributed Application Framework (SC - SODAF) model provides application theinfrastructure of offline work. The SC-SODAF model enables developer pay more attentionto the implementing of business logic. SC-SODAF model is divided into three layers in concept view: Offline enabled, Cacheservice, General Database Access (GDA) service. The collaboration between the layers isthat GDA service provides data accessing capability to not only Cache but also application,while Cache service supports Offline layer and application. SC-SODAF model provides the flexible expansion mechanism while offering a strongoffline function. Framework's abilities can be extended by embedding specific networkconnection detection mechanism, queue/cache persistent mechanism and encrypt algorithmswhich are implemented by framework user. Based on SC-SODAF model, applicationdeveloper can build robust distributed smart client system rapidly.