WebSphere Application Server V8.5 Migration Guide

358 WebSphere Application Server V8.5 Migration Guide

11.1 Application Migration Tool - WebSphere Version to

Version overview

The Application Migration Tool - WebSphere Version to Version (Application Migration Tool)

is part of the IBM WebSphere Application Server Migration Toolkit. This toolkit is part of an

overall migration strategy. The Application Migration Tool uses its scanning capabilities to

look for specific constructs that changed between versions of WebSphere Application Server

that can affect compilation and application server runtime behaviors. The tool provides a way

to review problematic code, detailed help on the issue, and in some cases, makes automatic

fixes to the code so that the application can run on IBM WebSphere Application Server

Versions 7, 8, or 8.5.

There are a number of issues that affect the code migration and development steps when you

migrate to newer WebSphere Application Server releases. The migration process can involve

modifying Java source code, JavaServer Pages (JSP), and deployment descriptors. These

changes include:

򐂰 Changes to the Java Runtime Environment (JRE) encountered in Java SE 5, 6, and 7

򐂰 Removal of previously deprecated features

򐂰 Behavioral changes in the product APIs

򐂰 Changes resulting from Java Enterprise Edition (Java EE) specification clarifications

򐂰 Deprecated features

The migration process can involve modifying Java source code, JavaServer Pages (JSP),

and deployment descriptors. The Application Migration Tool helps perform these types of

code changes. The Application Migration Tool scans for a number of known issues in

applications that are being migrated from WebSphere Application Server Versions 5.1, 6.0,

6.1, or 7.0 to WebSphere Application Server Versions 7.0, 8.0, or 8.5. Where possible, a

quick fix is provided to change the application code to address the changes

between versions.

For WebSphere Application Server version migration, the tool supports migration from:

򐂰 WebSphere Application Server Version 5.1

򐂰 WebSphere Application Server Version 6.0

򐂰 WebSphere Application Server Version 6.1

򐂰 WebSphere Application Server Version 7.0

򐂰 WebSphere Application Server Version 8.0

to:

򐂰 WebSphere Application Server Version 7.0

򐂰 WebSphere Application Server Version 8.0

򐂰 WebSphere Application Server Version 8.5

11.1.1 Application Migration Tool V3.5

Application Migration Tool adds new rules to help migrate applications, including:

򐂰 New Java and XML rules to migrate to WebSphere Application Server Version 8.5

򐂰 New Java SE 7 rules to flag Java 7 compatibility changes if you choose to use Java 7

򐂰 A new dynamic rule set dialog box, which simplifies rule selection and ease of use

򐂰 New depreciation rules