Developing WSRF-Based Web Service RTI Using GT4

HLA and Web service (WS) are two powerful architectures for interoperability. Although the original purposes of them are not very closer, now we can mix them together to solve some question in the simulation. WSRF specifies stateful Web services. It takes us lot of facilities when we counter with many resources and states in the WS. In this paper, we focus on developing a framework to combine the RTI and WSRF together and that is the so-called "WSRF-based Web service RTI". We encapsulate the standard RTI methods by GT4-a complete implementation of the WSRF , on the server, and deploy these GT4 interfaces. On the client, these WSRF interfaces are integrated by several classes, and these classes have same names and interfaces with the standard HLA/RTI classes. The users can use them to develop HLA simulation system. The WSRF-based Web service RTI is Web service not RTI. The main communication information is SOAP message between the clients and servers, so it provides reusability and flexibility to the simulation development and course. The structure of the framework and the detailed design are introduced in the paper. Of course, the encapsulation on RTI by GT4 will bring some additional overhead, so at the end of this paper, we test the time latency benchmark of the pRTI and the WSRF-based Web service RTI.