Distribute Service Components into Multi-level Architecture from Legacy Applications

With the growth of organizations, the scope and size of their information systems are getting bigger. The complexity of the business logic makes the legacy system low maintainability. By providing loose coupling, service oriented architecture (SOA) is becoming dominant enterprise IT architecture. How to identify reusable components from legacy system in future SOA system is becoming a hot research area. This paper proposes a multi-level architecture to meet the requirements of data separation in special organizations. Clustering technologies used to analyze and build components successfully are applied with component connectivity strength metric to distribute data and their relevant service components into levels for achieving SOA high performance, as well as flexibility and interoperation.