Welcome!

Related Topics: Java IoT

Java IoT: Article

Taking a Sun Java Studio Creator for a Drive

Taking a Sun Java Studio Creator for a Drive

If you do not really enjoy the process of creation of Web applications with JavaServer Pages, try Sun Java Studio Creator (JSC), which at the time of this writing is available as an Early Access release. There are several general reviews of this product on the Internet, but I'll show you how in less than an hour you can create a Web application with a logon page that performs database user authentication, and displays the main application page for a valid user. If this does not impress you, I can add that I had to write not more than 20 lines of code for this application - the rest was drag and drop.

First, download and install an Early Access release of JSC from wwws.sun.com/software/products/jscreator/ . Installation process is simple, and the product comes with Sun Application Server and PointBase DBMS.

Getting Familiar with IDE
After installation is done, start JSC and create a new project called TestLogon by selecting menus File | New Project. In several seconds, you'll see the windows that looks like this:

 

The big white rectangle in the middle is a page editing area, and we'll be dragging and dropping JSP Standard components from Pallete to the editing area. Right-click in the middle, select Properties and you'll see the Properties sheet in the top right part of the screen. The tabs at the bottom of the editing area allow you to switch between design and JSP source code panels.

The Project Navigator sheet on the right will let you select generated Java code for compilation, editing and debugging. There you can also specify page navigation for your application and add additional jar files, if needed.

Our first Page1.jsp will consist of three output text components (labels), two text fields and a Submit button.

Drag and drop the output text component on the white area, snap it to the proper location on the underlying grid, and resize it by stretching the rectangle. According to the Properties sheet, JSC has assigned the id outputText1 to this component. Right click on the component and type Enter Name in the Value filed. Place another output text component under the first one, and set its value to Enter Password.

Drag the text field component for the user name and drop it by the first output text. Look at the Properties sheet - its id is textField1. Place a secret field component under the text filed - its id is secretField1.

Now drop the button on the screen - it already has a default value Submit.

Let's add some color to the page - click anywhere in the white area and pick up a nice background color from the Properties sheet. Change the title of the page to be My Logon Page.

After all these manipulations my screen looks as follows:

 

If you want to see what the generated code looks like, just click on the tab Source at the bottom of the page. This is what I've got:


<?xml version="1.0"?>
<jsp:root version="1.2" xmlns:f="http://java.sun.com/jsf/core"
 xmlns:h="http://java.sun.com/jsf/html" xmlns:jsp="http://java.sun.com/JSP/Page">
<jsp:directive.page contentType="text/html;charset=UTF-8"/>
  <f:view>
    <html>
      <head>
       <title>Page1 Title</title>
      </head>
      <body bgcolor="#00ffff" rave-layout="grid">
        <h:form binding="#{Page1.form1}" id="form1">
         <h:outputText binding="#{Page1.outputText1}" id="outputText1" 
           style="position: absolute; left: 24px; top: 24px; width: 
                             120px; height: 26px" value="Enter Name"/>
         <h:outputText binding="#{Page1.outputText2}" id="outputText2" 
           style="position: absolute; left: 24px; top: 72px; width: 
                         120px; height: 26px" value="Enter Password"/>
         <h:inputText binding="#{Page1.textField1}" id="textField1" 
           style="position: absolute; left: 168px; top: 24px; width: 
                                               120px; height: 23px"/>
         <h:commandButton action="#{Page1.button1_action}" 
            binding="#{Page1.button1}" id="button1" style="position: 
                    absolute; left: 24px; top: 120px" value="Submit"/>
         <h:outputText binding="#{Page1.outputText3}" id="outputText3" 
            style="position: absolute; left: 168px; top: 120px; width: 
                                                120px; height: 26px"/>
         <h:inputSecret binding="#{Page1.secretField1}" 
            id="secretField1" style="position: absolute; left: 168px; 
                               top: 72px; width: 120px; height: 23px"/>
        </h:form>
       </body>
      </html>
    </f:view>
</jsp:root>

Now we can build and deploy the project using provided Sun Application Server. Just press the big green arrow on the top toolbar, Ant will build and deploy the project, and JSC will start the application server and display our logon page:

 

Let's drop one more output text field outputText3 by the Submit button - we'll use it to see that the server responds when we submit the data.

JavaServer Faces uses event-driven interaction between a JSP and the server-side classes. For example, when a user clicks on the button Submit, appropriate listener intercepts this event and executes the code that you provide.

Double-click on the button Submit, and JSC will open the corresponding method in the underlying Java class. In our case it's a method button1_action() in the class Page1. Just type in the following two lines shown in blue to get the entered value, append it to the word Validating, and send the whole phrase back to the browser as the value of the field outputText3.


public String button1_action() {
    // Add your event code here...
    String name = (String) this.textField1.getValue();
    outputText3.setValue("Validating "+ name);
    return null;
}

Save this code and re-deploy the application by clicking on the green arrow. Enter any name and press the button Submit. Now the browser sends a request to your server, JSF calls the method button1_action(), and you'll see the response:

 

The next goal is to to validate the entered name against a database table.

Working With a Database
Java Studio Creator includes a PointBase DBMS with a sample database Travel. You have to start the PointBase server by selecting system menus Start | Programs | Sun Microsystems | J2EE 1.4 SDK | Start PointBase. This server starts quickly and displays a message in a command window that it's listening to the port 9092. Minimize this command window and return to JSC.

In the Server Navigator sheet, under the Data Sources expand the database Travel, which has the following data in the table Person:

PersonID Name Jobtitle FrequentFlyer
1 McNealy, Scott CEO true
2 Schwartz, Jonathan VPO/CXO - SGMS true
3 Green, Rich VP true
4 Joy, William VP/CXO - SGMS false
5 Gosling, James VP true

Every time when the user hits the button Submit on the logon page, we'll try to find the entered name in the list of names retrieved from the database table Person. In our simple application the password is password for any user.

The next step is to link our page with the data - drag and drop the table Person onto Page1.jsp. At this point JSF creates two new components - PersonRowSet, which is a JDBC RowSet and a PersonModel (remember similar implementation of the MVC pattern in some Swing components?) . You can see these names in the Document Outline sheet. Check out the constructor of the class Page1 - JSC has generated the following code:


public Page1() {
   // Creator-managed initialization code
   try {
     personRowSet.setDataSourceName("java:comp/env/jdbc/Travel");
     personRowSet.setCommand("SELECT * FROM ROOT.PERSON");
     personModel.setWrappedData(personRowSet);
   }
   catch ( Exception e) {
     log("Page1 Initialization Failure", e);
     throw new FacesException(e);
   }
   // User provided initialization code
}

Add the following line to this try/catch block to populate the personRowSet:


personRowSet.execute(); 

Now we should add the code that compares the entered name with names retrieved from the table Person. Modify the method button1_action() in Page1.java to process the RowSet. If the names match and the user has entered the word password , we'll assume that it's a valid user:


    public String button1_action() {
        // Add your event code here...
        String name = (String) this.textField1.getValue();
        String pwd = (String) this.secretField1.getValue();
        outputText3.setValue("Validating "+ name);
        boolean isValidUser=false;
        
        try{
            personRowSet.beforeFirst();

            while(personRowSet.next()){
             String personName = personRowSet.getString("NAME");

             if (name.equals(personName) && "password".equals(pwd)){
                outputText3.setValue( name + " is a valid user");
                isValidUser = true;
                break;
             }
            }
            if (!isValidUser){
               outputText3.setValue( name + ": logon failed");
            }
        } catch ( Exception e) {
            log("Can not access personRowSet: ", e);
            throw new FacesException(e);
        }

        return null;
    }
Here's what I've got after entering an valid name and password:

 

To test this application against another DBMS right click on the Data Sources and select Add Data Source option to configure a data source for any other DBMS. It'll work as long as you have a JDBC 3.0 driver for this DBMS.

Page Navigation
To make our logon example more realistic, let's introduce another page -the main page of some application that has to be displayed for valid users.

JSC has a cool Page Navigation tool, where you can define navigation rules for your application. Right click on our Page1.jsp and select Page Navigation from the menu. You'll see the following screen:

 

Now, right click on the Page1.jsp icon, select New Page and enter its name as WelcomePage. Click on the Page1.jsp icon again, drag the line to the WelcomePage icon and change the name of the line to validUser:

 

Click on the Source tab to see the content of the file Navigation.xml that JSC has generated:


<?xml version="1.0"?>
<!DOCTYPE faces-config PUBLIC "-//Sun Microsystems, Inc.//DTD JavaServer Faces
 Config 1.0//EN"
  "http://java.sun.com/dtd/web-facesconfig_1_0.dtd">
<faces-config>
    <navigation-rule>
        <from-view-id>/Page1.jsp</from-view-id>
        <navigation-case>
            <to-view-id>/WelcomePage.jsp</to-view-id>
            <from-outcome>validUser</from-outcome>
        </navigation-case>
    </navigation-rule>
</faces-config>

This is how JavaServer Faces maps the outcome of the current page to the JSP that has to be displayed next.

Double click on the WelcomePage icon and add an output text component there with the value Welcome to My Application.

Finally, let's modify a little the code of the method button1_action() to return the value "validUser" in case of successful logon. This is how my while loop looks now:


           public String button1_action() {
        String name = (String) this.textField1.getValue();
        String pwd = (String) this.secretField1.getValue();
        try{
            personRowSet.beforeFirst();

            while(personRowSet.next()){
             String personName = personRowSet.getString("NAME");

             if (name.equals(personName) && "password".equals(pwd)){
                outputText3.setValue( name + " is a valid user");
                return "validUser";
             }
            }

            outputText3.setValue( name + ": logon failed");

        } catch ( Exception e) {
            log("Can not access personRowSet: ", e);
            throw new FacesException(e);
        }

        return null;
    }
}

Run the application again, and if you'll enter the valid name now, you'll see the next page:

 

During development of this application I've kept notes of what I did not like (do not forget - this is an early access release):

  • The name Java Studio Creator does not make any sense to me, since the tool is actually creating Web applications .
  • JSC starts slowly on my 1Ghz/1GB RAM/Windows 2000 notebook.
  • Undo option does not always work
  • Sometimes components were not shown in the designer, while the generated code was in place. And this is a showstopper - how many times are you willing to re-create the page from scratch?
  • After renaming the package, my Java code has disappeared.
  • Copy/paste is not fully functional yet.
  • Some modifications in the GUI designer do not sync up with Java code in the beans.
But overall, this test drive was a pleasant experience for me. After trying Java Studio Creator I want to learn JavaServer Faces technology! As a matter of fact I've already written my first logon application using JSF just now.

I was testing JSC while riding on a bus to work. A guy who was sitting next to me and watching what I was doing said: "It's like Visual Basic!". Well, it's not there yet. The Early Access edition of JSC is more like a concept car - you can get in, turn it on and touch the shiny controls. But when Sun will put it on the road, I'm sure that many Java developers who are currently driving on the server-side roads will buy it. But Sun Microsystems should move fast, because IBM has already announced the release of the WebSphere Studio V5.1.2, which will also include drag and drop programming with JavaServer Faces.

More Stories By Yakov Fain

Yakov Fain is a Java Champion and a co-founder of the IT consultancy Farata Systems and the product company SuranceBay. He wrote a thousand blogs (http://yakovfain.com) and several books about software development. Yakov authored and co-authored such books as "Angular 2 Development with TypeScript", "Java 24-Hour Trainer", and "Enterprise Web Development". His Twitter tag is @yfain

Comments (7) View Comments

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


Most Recent Comments
Alexandre Barão 06/18/04 08:43:24 AM EDT

I do not really enjoy the process of creation of Web applications with JavaServer Pages but this article
shows the easy way to create a Web application... Thanks!
Alverca, Fado - Alemão! :)

jim caprioli 06/18/04 02:59:09 AM EDT

Some thoughts I had while reading your entertaining article.

- Concept cars give you this "if I only had..." feeling.
- I was very disappointing with this stuff.
- NetBeans does the job for me.
- So the guy ''in the bus'' is the VB user hey?
- Sun is a hardware company: ver good in compilers and Java. - I always end up at the site of JCreator when looking for info about this product.
- Worst name ever: "I just can''t remember it!"

GrtZ
jim

Yakov Fain 06/15/04 11:15:59 AM EDT

The article reads: "Add the following line to this try/catch block to populate the personRowSet:
personRowSet.execute();"

This means that you should put this line inside the try/catch block.

Regards,
Yakov Fain

Carol Cassles 06/15/04 11:10:08 AM EDT

Yakov Fain:

I followed the steps in your article very carefully. I got to the point where one adds the code that compares the entered name with names retrieved from the table Person. When I try to compile the source code I get a compiler error.

The error looks like this:

Compiling 1 source file to H:\My Documents\Creator\Projects\LOGONAUTH2\build\WEB-INF\classes
untitled\Page1.java [123] unreported exception java.sql.SQLException; must be caught or declared to be thrown
personRowSet.execute();
^
Are all of us newbees asking you how to "catch or declare" this command or is it just me?

Carol Cassles
[email protected]

Yakov Fain 05/25/04 02:28:03 PM EDT

Well, my laptop is not that bad - it has has 1Gb of RAM and 1Ghz processor :)

Winston Rast 05/25/04 02:07:49 PM EDT

I''m curious how you managed to boot Win2k in 1MB. :)

John Rubier 05/21/04 03:56:44 PM EDT

It runs slow?
I''m surprised much of anything runs at all on your "1Mhz/1MB RAM/Windows 2000 notebook"!

;-)

Latest Stories
Lori MacVittie is a subject matter expert on emerging technology responsible for outbound evangelism across F5's entire product suite. MacVittie has extensive development and technical architecture experience in both high-tech and enterprise organizations, in addition to network and systems administration expertise. Prior to joining F5, MacVittie was an award-winning technology editor at Network Computing Magazine where she evaluated and tested application-focused technologies including app secu...
DXWorldEXPO LLC announced today that Nutanix has been named "Platinum Sponsor" of CloudEXPO | DevOpsSUMMIT | DXWorldEXPO New York, which will take place November 12-13, 2018 in New York City. Nutanix makes infrastructure invisible, elevating IT to focus on the applications and services that power their business. The Nutanix Enterprise Cloud Platform blends web-scale engineering and consumer-grade design to natively converge server, storage, virtualization and networking into a resilient, softwar...
DXWorldEXPO LLC announced today that Big Data Federation to Exhibit at the 22nd International CloudEXPO, colocated with DevOpsSUMMIT and DXWorldEXPO, November 12-13, 2018 in New York City. Big Data Federation, Inc. develops and applies artificial intelligence to predict financial and economic events that matter. The company uncovers patterns and precise drivers of performance and outcomes with the aid of machine-learning algorithms, big data, and fundamental analysis. Their products are deployed...
Dynatrace is an application performance management software company with products for the information technology departments and digital business owners of medium and large businesses. Building the Future of Monitoring with Artificial Intelligence. Today we can collect lots and lots of performance data. We build beautiful dashboards and even have fancy query languages to access and transform the data. Still performance data is a secret language only a couple of people understand. The more busine...
Having been in the web hosting industry since 2002, dhosting has gained a great deal of experience while working on a wide range of projects. This experience has enabled the company to develop our amazing new product, which they are now excited to present! Among dHosting's greatest achievements, they can include the development of their own hosting panel, the building of their fully redundant server system, and the creation of dhHosting's unique product, Dynamic Edge.
This session will provide an introduction to Cloud driven quality and transformation and highlight the key features that comprise it. A perspective on the cloud transformation lifecycle, transformation levers, and transformation framework will be shared. At Cognizant, we have developed a transformation strategy to enable the migration of business critical workloads to cloud environments. The strategy encompasses a set of transformation levers across the cloud transformation lifecycle to enhance ...
Your job is mostly boring. Many of the IT operations tasks you perform on a day-to-day basis are repetitive and dull. Utilizing automation can improve your work life, automating away the drudgery and embracing the passion for technology that got you started in the first place. In this presentation, I'll talk about what automation is, and how to approach implementing it in the context of IT Operations. Ned will discuss keys to success in the long term and include practical real-world examples. Ge...
The challenges of aggregating data from consumer-oriented devices, such as wearable technologies and smart thermostats, are fairly well-understood. However, there are a new set of challenges for IoT devices that generate megabytes or gigabytes of data per second. Certainly, the infrastructure will have to change, as those volumes of data will likely overwhelm the available bandwidth for aggregating the data into a central repository. Ochandarena discusses a whole new way to think about your next...
So the dumpster is on fire. Again. The site's down. Your boss's face is an ever-deepening purple. And you begin debating whether you should join the #incident channel or call an ambulance to deal with his impending stroke. Yes, we know this is a developer's fault. There's plenty of time for blame later. Postmortems have a macabre name because they were once intended to be Viking-like funerals for someone's job. But we're civilized now. Sort of. So we call them post-incident reviews. Fires are ne...
Whenever a new technology hits the high points of hype, everyone starts talking about it like it will solve all their business problems. Blockchain is one of those technologies. According to Gartner's latest report on the hype cycle of emerging technologies, blockchain has just passed the peak of their hype cycle curve. If you read the news articles about it, one would think it has taken over the technology world. No disruptive technology is without its challenges and potential impediments t...
Hackers took three days to identify and exploit a known vulnerability in Equifax’s web applications. I will share new data that reveals why three days (at most) is the new normal for DevSecOps teams to move new business /security requirements from design into production. This session aims to enlighten DevOps teams, security and development professionals by sharing results from the 4th annual State of the Software Supply Chain Report -- a blend of public and proprietary data with expert researc...
CloudEXPO New York 2018, colocated with DevOpsSUMMIT and DXWorldEXPO New York 2018 will be held November 12-13, 2018, in New York City and will bring together Cloud Computing, FinTech and Blockchain, Digital Transformation, Big Data, Internet of Things, DevOps, AI and Machine Learning to one location.
CloudEXPO | DevOpsSUMMIT | DXWorldEXPO are the world's most influential, independent events where Cloud Computing was coined and where technology buyers and vendors meet to experience and discuss the big picture of Digital Transformation and all of the strategies, tactics, and tools they need to realize their goals. Sponsors of DXWorldEXPO | CloudEXPO benefit from unmatched branding, profile building and lead generation opportunities.
The digital transformation is real! To adapt, IT professionals need to transform their own skillset to become more multi-dimensional by gaining both depth and breadth of a wide variety of knowledge and competencies. Historically, while IT has been built on a foundation of specialty (or "I" shaped) silos, the DevOps principle of "shifting left" is opening up opportunities for developers, operational staff, security and others to grow their skills portfolio, advance their careers and become "T"-sh...
ICC is a computer systems integrator and server manufacturing company focused on developing products and product appliances to meet a wide range of computational needs for many industries. Their solutions provide benefits across many environments, such as datacenter deployment, HPC, workstations, storage networks and standalone server installations. ICC has been in business for over 23 years and their phenomenal range of clients include multinational corporations, universities, and small busines...