The document introduces Eclipse Transformer, a new open source project that can transform binary Java artifacts and resources to update package names and references, such as converting javax.servlet to jakarta.servlet following the Jakarta EE 9 specification. It is currently in an early development stage, with initial releases published and plugins in progress. The project aims to help migrate existing code and dependencies to the new Jakarta package names.

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June 23, 2020
BJ Hargrave (IBM)
@bjhargrave
Eclipse Transformer

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Contents
● What is Eclipse Transformer?
● Project Status

3. COPYRIGHT (C) 2020, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)
What is Eclipse Transformer?
COPYRIGHT (C) 2020, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)

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● Created by the need to deal with existing binary artifacts which reference the pre-Jakarta 9
package names.
○ For example, javax.servlet is now jakarta.servlet.
● The project can transform binary class files and containers of binary class files such as JARs,
EARs, WARs, etc.
○ Also other important resources such as manifests, property files, ServiceLoader
configuration files and other text files
● Rule driven so custom rule sets can be used
○ Jakarta 9 rule set being developed
● Plan to have CLI, Maven and Gradle plugins
4
Transformer of binary artifacts

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Project Status

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● A new Eclipse project under the Eclipse Technology top-level project
○ Not part of the Jakarta EE working group itself
○ Initial committers includes many Jakarta EE community members
● GitHub repository was just recently provisioned and populated with the initial contribution
● Lots of initial successes using Transformer by Jakarta 9 implementation teams
● Working hard to get some early releases available
○ Currently publishing 0.2.0-SNAPSHOT artifacts on OSSRH
○ Early versions of the CLI and a maven plugin are currently available
● Dual licensed under EPL-2.0 or Apache-2.0
6
https://github.com/eclipse/transformer

7. Thank you!
COPYRIGHT (C) 2020, ECLIPSE FOUNDATION, INC. | THIS WORK IS LICENSED UNDER A CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE (CC BY 4.0)