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Part II: Creating new Managers - A HowTo for creating Business Delegates that talk to the database tier (DAOs) and the web tier (Struts Actions).

About this Tutorial

This tutorial will show you how to create a Business Delegate class (and a JUnit) to talk to the DAO we created in Part I of this tutorial.

In the context of AppFuse, this is called a Manager class. It's main responsibility is converting backend data (POJOs) into front-end data (Struts ActionForms). The main reason I even use Managers, rather than just calling the DAOs directly is testability. It's nice to be able to populate a Form manually (in the test) and call the DAO to persist it, and verify the database gets the proper results. The Business Delegate pattern from Sun says that these objects are usefull for de-coupling your presentation layer from your database layer. Managers should also be where you put any business logic for your application.

I will tell you how I do stuff in the Real World in text like this.

Let's get started on creating a new ManagerTest and Manager in AppFuse's architecture.

Table of Contents

  • [1] Create a new ManagerTest to run JUnit tests on the Manager
  • [2] Create a new Manager to talk to the DAO
  • [2] Run the ManagerTest


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This particular version was published on 06-Nov-2006 13:52:32 MST by MattRaible.