IBM Branch Transformation Toolkit 5.1 Migration and Usage Guidelines

Chapter 3. Planning a Branch Transformation Toolkit migration 75

– The application presentation tier, providing a bridge between the client

and the application logic tier, and managing the views of the Java client

sample application

– The application logic tier, conducting business transactions.

– The back-end system tier, storing the business data.

򐂰 HTML sample application

This sample demonstrates the important steps in developing an online home

banking application using the features of the Branch Transformation Toolkit

that support HTML clients. This sample can be used as a guideline for

solution providers who wish to gain a better understanding of the toolkit

facilities.

The target environment for the HTML sample is a four-tier architecture: client,

application presentation layer, application logic layer, and backend system

layer. In this case, the client is the Web browser used to access the home

banking application. This sample does not show the details of communication

between the server and the host because this is not its main purpose.

The application comprises the following:

– Client user interface components (JSP files)

– Business navigation processes (toolkit Struts extension externalized XML

files)

– Invoker definition (resource bundle file)

– Business logic components (Java code in Single Action EJB and business

process component)

3.2 Application packaging and topology

As part of building a Branch Transformation Toolkit solution, you should consider

application packaging and managing runtime topologies.

3.2.1 Application packaging

An important deployment issue is to determine a policy for packaging the

application code and resources. This policy determines how to distribute the

code and resources on different servers. A solution based on Branch

Transformation Toolkit may use Java Archive (JAR) files that provide physical

packaging for a set of files. The JAR files have the following advantages:

– Reduced interactions with the server during the download process.

– Improved transmission performance because of object compression.

– Optimized memory usage in the browser cache.