A Study Of Services-Oriented Enterprise Application Integration Base On Dynamic Workflow

Enterprise Application Integration is a global task to share data and operations base on the applications and data sources connected by enterprise intranet. All the software development did not consider the enterprise information architecture both from the planning and technique architecture. The existence of isolate information islands is the result. But Services Oriented Architecture (SOA) solves this problem radically. SOA use service to encapsulate the operation from remained system and use the composition technique to build operation processes flexibly. And the Enterprise Application Integrate base SOA is becoming a major research aspect. With the development of electronical business, there are some needs to integrate some different operations base on operation processes for the business logical needs. But traditional services composition technique cannot reach this target because it need to hard code the service into operation processed at design stage, and it cannot have dynamic changes at runtime.This paper gives a new Service Oriented Enterprise Application Integration model after doing some research of existing EAI models. This model does not only keep the loose coupling of the traditional model, but also introduce the workflow technique to replace the services orchestration and use workflow pattern to customize the rules to build more complex business processes base on web services. In order to solve the problem of hard coding the service into business process at design stage, the model also proposes the concept of abstract service. It use abstract service to orchestrate business processes, use service proxy to implement the dynamic workflow which can do dynamic binding at runtime based on the context. And QoS customization can let business process to choose appropriate service for users needs. In addition, this paper also introduces some service composition algorithms, compare the time performance of them, and finally propose a improved services selection algorithm. And the experiments show the efficiency of algorithm. After do this, this paper is also analyze the applicability of the algorithm, and propose a selection strategy in enterprise environment. At last, a example of the real EAI is given. In this example, the process of analysis, design and implementation for the SOA base on workflow is presented.