1 Reply Latest reply on Sep 1, 2013 7:30 PM by jschellSomeoneStoleMyAlias

    Java application layered architecture: DAO question.


      Dear All,


      I am working on a project which comprises a web site and some backend processes.


      The program architecture is layered into following la


      Layer 1. web frontend, backend processes


      Layer 2. business logic (for web frontend only)


      Layer 3. DAO


      Layer 4. persistence layer


      DAO is supposed to be a common module to handle all the data access logic for upper layers.


      Maven is used for the project management. The dependencies are set via pom.xml.


      Web frontend is deployed into JBoss, while backend processes is a standalone java application.


      The question is "Should modules in Layer 1 and Layer 2 provide the database connections to DAO? Or let DAO do the database connection itself?"