glassfish bootcamp netbeans lab

8/6/2019 GlassFish Bootcamp NetBeans Lab

1/15

GlassFish Development with NetBeans 7.0Hands-on Lab

Vince Kraemer, Oracle Corporationblogs.oracle.com/vkraemer

1


2/15

Table of Contents

1.0 Overview..............................................................................................................................................3

2.0 Hands-on Lab Instructions...................................................................................................................3

3.0 Optional Component Instructions........................................................................................................7

3.1Verify the prerequisites.....................................................................................................................7

3.2 Creating a set of entity classes........................................................................................................93.3 Create the RESTful web services with Jersey...............................................................................12

4.0 Troubleshooting.................................................................................................................................15

2


3/15

1.0 Overview

The goal of this lab is to introduce folks to some of the development optimizations that areincorporated into the NetBeans IDE plugin for GlassFish. These optimizations help usersfocus on coding.

This hands-on lab will:

Demonstrate Java EE 6 simplified packaging

Demonstrate deployment integration

Demonstrate 'Deploy on Save' functionality

Demonstrate cross deployment session preservation

The optional component of the lab demonstrates how to expose the content of a databaseRESTfully and as a JSR-109 web service with no coding:

Demonstrate code generation wizard for JPA

Demonstrate code generation wizard for JAX-RS (Jersey)

2.0 Hands-on Lab Instructions

2.1Create a Java EE 6 Webproject by selecting the'New Project...' item fromthe File menu. Expandthe Samples Categoryand select the Servlet

Stateless project from theJava Web category. ClickNext> and Finish toaccept the defaults.

Verify that the project thatis created is the MainProject: The text for thename of the projectshould be bold.

3


4/15

2.2Use 'F6' to run the main project. You can also select the 'RunMain Project' item from the Run menu.

This will generate a lot of activity. Three output tabs will open

on the lower right of the NetBeans window.

The browser opens and the initial page of the web application is displayed.

You can

enter aname tosee howtheapplicationresponds.

2.3Take a look at the server's log in the output window titled 'GlassFish Server 3.1'

4


5/15

2.4Open the file StatelessSessionBean.java, byexpanding the project's tree and double clickingon the node.

2.5Add a new Business method to this EJB.

public String sayWelcomeBack(String name) {return "Welcome back, " + name + "!\n";}

When you save the change, pay attention to theserver's log window. The Deploy on save featureof NetBeans will activate and a redeploy will betriggered.

2.6 Open the file Servlet2Stateless.java and replace

String val = req.getParameter("name");

if ((val != null) && (val.trim().length() > 0)) {out

.println(" Greeting from StatelessSessionBean: "+ sless.sayHello(val) + "
");

}

With

String val = req.getParameter("name");

if ((val != null) && (val.trim().length() > 0)) {String prevName = (String) req.getSession().getAttribute("prevName");req.getSession().setAttribute("prevName", val);

out.println(" Greeting from StatelessSessionBean: ");if (val.equals(prevName)) {

out.println(sless.sayWelcomeBack(val) + "
");} else {

out.println(sless.sayHello(val) + "
");}

}

Save this change with Control-S/Clover-S and switch to the browser.

2.7Enter a name in the text field. Enter the same name a second time and you willnotice that the reply changes to be something like:

Greeting from StatelessSessionBean: Welcome back, name you entered!

5


6/15

2.8Edit the sayWelcomeBack(String) method in the file StatelessSessionBean.java, soit reads:

public String sayWelcomeBack(String name) {return "Welcome back, " + name + ", again!\n";

}

and save this change. You will see that the project gets redeployed.

2.9Go back to the browser and re-enter the name that you entered in 2.7. You will seethe following output:

Greeting from StatelessSessionBean: Welcome back, name you entered, again!

This means that the session data was preserved across the redeploymentoperations.

6


7/15

3.0 Optional Component Instructions

In this second optional section of the lab you will use some of the code generation wizards that are

available in NetBeans to access database entities RESTfully and via a JSR 109 Web Service.

3.1Verify the prerequisitesThe sample database must be registered in NetBeans and populated with data to continue.

A) Switch to the Services explorer and verify that

you see the following

This shows us that a database connection has

been registered in NetBeans.

If that appears, we need to verify that there is apopulated database available for that registered

database connection.

B) Right-click on the JDBC connection URL and select the 'Connect...' item from the menu that

appears.

If an authentication dialog appear, enter the password

'app'.

7


8/15

C) Expand the connection to verify that you see the following tree:

D) Right-click on one of the DISCOUNT_CODE table and select 'View Data...' from the menu. An'SQL Command' window will appear in the Editor area.

You may need to resize the lower pane (titled 'select * from APP.DISCOUN...') to see theactual data rows.

8


9/15

3.2 Creating a set of entity classes

A) Use Control-N/Clover-N to open the New File Wizard.

Select the 'Persistence' Category and the 'Entity Classes from Database' File Type and press the'Next>' button.

B) Select 'New Data Source' as the value of the 'Data Source' field in the dialog that appears. This

will make a secondary dialog appear. Enter a name of your choosing in the 'JNDI Name' field.Select the connection that we used to 'View Data...'. Press the OK button to dismiss the

secondary dialog.

9


10/15

C) The primary dialog will update to include some 'Available Tables'. Press the 'Add All' button to

transfer them to the 'Selected Tables' list and press 'Next>' to proceed.

10


11/15

D) Press the 'Finish' button to accept the defaults on this page and the next page. Update the default

value for the 'Package' field when using this wizard for 'real' code.

E) Switch back to the Projects explorer to see the generatedclasses.

11


12/15

3.3 Create the RESTful web services with Jersey

A) Use Control-N/Clover-N to open

the 'New File...'

wizard again. Select

the 'Web Services'category and

'RESTful Web

Services from EntityClasses' file type.

Press 'Next>'

B) Move all the Entity classesthat appear in the 'Available

Entity Classes' list to the

'Selected Entity Classes' listwith the 'Add All' button.

Press 'Next>' to continue.

C)

12


13/15

D) You can accept the defaults on the page that appear by pressing the 'Finish' button. You would

probably want to provide a different value in the 'Resource Package' field when this wizard is

used for 'real' code.

E) Uncheck the item labelled 'Add Jersey library' and use the OK button to dismiss the secondary

dialog that appears.

13


14/15

F) NetBeans generates a number of classes and updates the Projects explorer view of the project

with an additional node: RESTful Web Services.

You can see how these services respond to an HTTP GET using the 'Test Resorce Uri' item from theright-click menu of any of the service nodes, like DiscountCodeFacadeREST.

14


15/15

4.0 Troubleshooting

4.1 If no sample database is shown during JDBC connection pool creation, then expand theDatabases, JavaDB node in the Services pane and connect to one of the existingdatabases.

15

glassfish bootcamp netbeans lab

Documents