Research of Service Granularity Base on SOA in Railway Information Sharing Platform

Service Oriented Architecture (SOA) is an approach for building distributed systems that deliver application functionality as a set of self-contained business- aligned services with well-defined and discoverable interfaces. It can use coarse-grained services as well as fine- grained services. Both of them have their advantages. In the backdrop of railway information sharing platform, we propose a division method to decide the appropriate level of service granularity. The proposed method divides the services into three parts: basic service, combination service, integrated process service. Each service has its scope and combination. An application example is used to illustrate the method. Index Terms—railway information sharing platform, service granularity, SOA