CreateManager

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About 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
• [3] Run the ManagerTest

Create a new ManagerTest to run JUnit tests on the Manager [#1]

I usually copy (open → save as) an existing test (i.e. UserManagerTest.java) and find/replace [Uu]ser with [Pp]erson, or whatever the name of my object is.

package org.appfuse.webapp.service;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.appfuse.webapp.form.PersonForm;

public class PersonManagerTest extends BaseManagerTestCase {
    //~ Instance fields ========================================================

    private PersonManager mgr = null;
    private Log log = LogFactory.getLog(PersonManagerTest.class);
    private PersonForm personForm;

    //~ Constructors ===========================================================

    public PersonManagerTest(String name) {
        super(name);
    }

    //~ Methods ================================================================

    protected void setUp() throws Exception {
        super.setUp();
        mgr = new PersonManagerImpl(conn);
    }

    protected void tearDown() throws Exception {
        super.tearDown();
        mgr = null;
    }

    public static void main(String[] args) {
        junit.textui.TestRunner.run(PersonManagerTest.class);
    }
}

Create a new Manager to talk to the DAO [#2]

Run the ManagerTest [#3]