Dr. Winston Prakash Ph.D. 

Add Glassfish (Application Server) to the IDE

• In the Runtime tab click on the IDE and select Add Server
• In the dialog point to the directory of Glassfish
  • Download Glassfish from here.
• Use "adminadmin" as password.

Create the model project

• Click on the Create project icon in the toolbar (second button)
• Select Java -> Java Class Library
  • Project Name: TestModelApp
  • Package: com.samples.model

Create the Web project

• Click on the Create project icon in the toolbar (second button)
• Select Web -> Web Application
  • Project Name: TestWebApp
  • Package: com.samples.web
• Add the project TestModelApp as dependent project to Web Project
  • Right Click on the project node and select "properties"
  • In the dialog click on the "Library" node in the left
  • In the right hand side click on the add project and select the location of "TestModelApp"

Create the Database Connection

• Select the "Runtime" tab 
• Open the Databases Node and right click on the Drivers Node and select menu item "New Driver"
  In the resulting dialog select your MySql connextor/j JDBC driver
• Right Click on the Databases Node and select "New Connection"
• In the Name combobox select MySql (Connector/J) and then Provide the necessary connection parameters. For Ex
  • Database URL:jdbc:mysql://localhost/sample
  • User Name: sample
  • Password: sample
• Open the table node in the added connection and make sure the connection is correct.

Note: In this walk through, it is assumed that you already have a "sample" MySQL database that has one table called "Users". The table "Users" has four columns "user_id" (Primary Key, Type: INTEGER), userName, password, email_address (all of type String).

Create the Entity Class  from Database in the Model Project

• Right click on the project "TestModelApp" and select New -> other -> Persistence -> Entity Classes from Database
• Select Database Connection "Sample" and select "Users" as the Selected Tables
• In the next tab of the wizard click on the Create Persistence Unit and call it "samplePU"
• In the Entity Bean Tab of the Wizard provide
  • ClassName: User (IDE may suggest Users)
  • Package: com.samples.model
• Check that the persistence Unit is created correctly
  • Open Source Packages -> META-INF and double click on the Persistence.xml and check that the file has been created with persistence-unit element as shown below.

<persistence-unit name="samplePU" transaction-type="RESOURCE_LOCAL">
  <provider>
       oracle.toplink.essentials.PersistenceProvider
  </provider>
  <class>com.samples.model.User</class>
  <properties>
     <property name="toplink.jdbc.url" value="jdbc:mysql://localhost/sample"/>
     <property name="toplink.jdbc.user" value="sample"/>
     <property name="toplink.jdbc.driver" value="com.mysql.jdbc.Driver"/>
     <property name="toplink.jdbc.password" value="sample"/>
   </properties>
</persistence-unit>

Create the Entity Controller Class  

• In the package "com.samples.model" create a class called "UserController" and add the code

private EntityManagerFactory emf;

private EntityManager getEntityManager() {
  if(emf == null){
   emf = Persistence.createEntityManagerFactory("samplePU");
  }
  return emf.createEntityManager();
}

public Users[] getUsers() {
  EntityManager em = getEntityManager();
  try{
    Query q = em.createQuery("select c from Users as c");
    return (User[]) q.getResultList().toArray(new User[0]);
  } finally {
    em.close();
  }
}

Bind Entity Bean to the Table Component

For this first we need to create a property that returns the array of User objects and then bind that array to the Table Component. This User[] array will be initialized using  JPA Entity Manager.

• Add a Property called users to the Session Bean.
  • Double  click on the SessionBean1 node in the outline window and open  it in the Java Editor.
  • Type the line private User[] users;
  • Right click on this line and select the action "Generate Code"
  • In the resulting popup menu select "Getter and Setter"

• Add a method  called updateUsers() as below that will be used to initialize the users property.

public void updateUsers(){
  UsersController usersController = new UsersController();
  users = usersController.getUsers();
}

• Fix the needed import for UserController
• Now call  the initialization method updateUsers()  in the init() of Sessionbean1.java 

updateUsers();

• Compile the project (Note: This is a needed step)
• Open the Page1.jsp in the designer
  • Note: if the designer is already opened click on the refresh button
• Drag and drop a Table Component on to the designer.
•  Click on the Table Component and select users as the binding array.
  • Adjust the columns to be displayed  if needed
• Deploy the project and the Table Component should display the data as

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