The Big Picture
The Java control tutorial is the first in a series of three tutorials that
builds the Investigate Application, an application designed to assemble a
credit-worthiness report on loan applicants. (Note: you do
not need to execute the tutorial series in order. You may
skip ahead to the web services tutorial or page flow tutorial if you wish.)
This, the first tutorial in the series, builds the core of the application:
the Investigate Java control. The Investigate Java control consults a variety
of components to assemble the credit-worthiness report. The Investigate Java
control and its components are shown in blue in the diagram to the right.
The remaining two tutorials focus on different ways to access the core functionality
encapsulated by the Investigate Java control.
The second tutorial in the series, Tutorial:
Web Service, builds the web services tier of the application.
The third tutorial in the series, Tutorial:
Page Flow, builds a web-based user interface for the Investigate Application.
Tutorial Goals
Through this tutorial, you will learn how to create and test a Java control
with WebLogic Workshop. Along the way, you will also learn how to create methods
that expose a control's functionality, become acquainted with WebLogic Workshop's
support for asynchronous communication and loose coupling, and learn how to
use WebLogic Workshop's built-in Java controls to help you connect to backend
resources and to speed the design process.
Tutorial Overview
The Java control you build with this tutorial collects credit-related information
about a loan applicant, computes a credit worthiness score, and returns the
combined information to the client.
There are six actors in this scenario:
This tutorial guides you through the process of adding functionality in increments,
and shows you how to test your Java control as you build it.
Steps in This Tutorial
Step 1: Begin the Investigate
Java Control — 25 minutes
In this step you build and run your first WebLogic Workshop
Java control. You start WebLogic Workshop and WebLogic Server, then create
the access points clients use to request and retrieve credit reports.
Step 2: Add a Database Control
— 20 minutes
You add a control for access to a database, then query the
database for bankruptcy information.
Step 3: Add a Web Service
Control — 25 minutes
You use a Web service control to invoke another web service,
collecting credit card data on the applicant. This step also uses XMLBeans
to parse the response from the Web service.
Step 4: Add a JMS Control
— 20 minutes
You will take the data you have gathered and request help
from an in-house application to retrieve a credit score.
Step 5: Add an EJB Control
— 20 minutes
You will send the credit score to an Enterprise Java Bean
(EJB) that will use it to measure the applicant's credit risk.
Step 6: Add
Support for Cancellation and Exception Handling — 20 minutes
You enhance Investigate to handle a client's desire to cancel
the request, an overly long wait for a response from the credit card service,
and exceptions thrown from your service's methods.
Step 7: Security — 20
minutes
You modify the Investigate Java control so it can access
a web service over SSL (Secure Socket Layer).
Step 8: Compile the Java
Control and Add a Property — 25 minutes
You add a property to the Investigate Java control so that
developers using the control can change the way it functions and you package
the control as a JAR file for general distribution.
Summary:
Java Control Tutorial
You review the concepts and technologies covered in the tutorial.
This step provides additional links for more information about each area covered.
To begin the tutorial, see Step 1: Begin
the Investigate Java Control.
Click the arrow to navigate to the next step.
