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The Angus Activation is a compatible implementation of the Jakarta Activation Specification 2.1+ which lets you take advantage of standard services to: determine the type of an arbitrary piece of data; encapsulate access to it; discover the operations available on it; and instantiate the appropriate bean to perform the operation(s).

This project is part of Eclipse Angus project.

Table of Contents

Latest News

March 2, 2024 - Angus Activation 2.0.2 Final Release

Eclipse Angus Activation 2.0.2 is a bug fix release of 2.0.x integrating Jakarta Activation API 2.1.3.

April 28, 2023 - Angus Activation 2.0.1 Final Release

Eclipse Angus Activation 2.0.1 is a bug fix release of 2.0.x fixing integration with OSGi Mediator Specification and class file version in package-info.

January 13, 2023 - Angus Activation 2.0.0 Final Release

Changes module name from com.sun.activation.registries to org.eclipse.angus.activation and package name from com.sun.activation.registries to org.eclipse.angus.activation.

January 11, 2023 - Angus Activation 1.1.0 Final Release

Adds built-in support for GraalVM native-image, support for OSGi Mediator Specification, clean up supported system properties.

system property description value
angus.activation.addreverse Read mailcap file from the end false (default) / true
angus.activation.debug Print log messages, logger name is angus.activation false (default) / true
native-image option description value
angus.activation.native-image.enable Turn on built-in support for native image false / true (default)
angus.activation.native-image.trace Print log messages to System.out false (default) / true

System properties with jakarta.activation/javax.activation prefix are deprecated and future versions of Angus Activation ignore them.

December 14, 2021 - Angus Activation 1.0.0 Final Release

Initial release of the Eclipse Angus - Angus Activation project. Provides implementation of the Jakarta Activation 2.1 Specification. The main jar file is now located at org.eclipse.angus:angus-activation.

July 27, 2021 - Angus Activation inception

As part of breaking tight integration between Jakarta Activation API and the implementation, implementation sources were moved to this new project - Eclipse Angus - and further development continues here. Eclipse Angus is direct accessor of JavaActivation/JakartaActivation.

Download Angus Activation Release

The Angus Activation jar file, which is all most applications will need, is published to the Maven repository and can be included in a project using this Maven dependency:


You can find all of the Eclipse Angus jar files in Maven Central.

API Documentation

The Angus Activation API documentation is available here.


You can post questions to the angus-dev mailing list.


Angus Activation bugs are tracked in the GitHub Angus Activation project issue tracker.

Development Releases

Snapshot builds of the next version of the Angus Activation under development are published to the Jakarta Sonatype OSS repository. These snapshot builds have received only minimal testing, but may provide previews of bug fixes or new features under development.

For example, you can download the angus-activation.jar file from the Eclipse Angus 2.0.0-SNAPSHOT release here. Be sure to scroll to the bottom and choose the jar file with the most recent time stamp.

You’ll need to add the following configuration to your Maven ~/.m2/settings.xml to be able to use these with Maven:

        <!-- to allow loading Jakarta snapshot artifacts -->
                    <name>Jakarta Snapshots</name>

And then when you build use mvn -Pjakarta-snapshots ....

If you want the plugin repository to be enabled all the time so you don’t need the -P, add:


By contributing to this project, you agree to these additional terms of use, described in CONTRIBUTING.

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