The implementation of the work management contract and the message inflow contract in the java connector architecture 1.5

The JCA(Java Connector Architecture) is the specification for integrating a J2EE application server with legacy systems such as DBMS, ERP, JMS, etc. The JCA 1.0 provides the API sets for a J2EE application server to communicate with legacy systems using three kinds of contracts. In the JCA 1.5, the new features are added including the contracts in the JCA 1.0.In this paper, I briefly introduce the JCA architecture and the basic contracts. And I discuss the implementation of the work management contracts and the message inflow contract which are the most important contracts among the new features in the JCA 1.5.