FT-Net Traveler: Fault-Tolerant and Scalable Web Service Broker Architecture

Web services are becoming the ultimate response for organizations and companies offering their core business services over the Internet. In fact, those business services are being offered through Web services which act like APIs providing the logic to handle a business service. Although, some Web services do not require other Web services to accomplish their tasks, the most interesting ones do the opposite. In that sense, Web services are orchestrated to create new complex business services that can reach Web services of several companies. For the purpose to handle it we proposed Net Traveler that is an autonomic Framework for collaboration, orchestration and choreography of Web services. Some design requirements are critical in the composition of Web services. Reliability and scalability among others must be done in order to offer a minimum of quality of service for composite Web services. In this paper we present the architecture of FT-Net Traveler which provides reliability through fault tolerance and scalability through load balancing to composite Web services without requiring modifications on them.