in Architecture

Design approaches

Here is another memento I wrote to remember the different approaches when writing EJB 3 or Web services.

EJB 3 Develop entity beans first then derive db schema Develop db schema first and drive upwards to create entity beans from your schema Create entity beans and db schema and map both respectively
Web Services contract first : in the top-down scenario, the developer first creates or is given the WSDL file for the service, and then must create a component to implement the operations. First you create a Java bean or EJB bean and then use the Web services wizard to create the WSDL file and Web service. In this case the starting point consists of both the WSDL file and the implementation component, and the developer must create additional support code that maps between the two.