A JBoss Project
Red Hat
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Weld is the reference implementation of CDI: Contexts and Dependency Injection for the Java EE Platform which is the Java standard for dependency injection and contextual lifecycle management and one of the most important and popular parts of the Java EE platform.

Weld is integrated into many Java EE application servers such as WildFly, JBoss Enterprise Application Platform, GlassFish, Oracle WebLogic and others. Weld can also be used in a Servlet-only environment (Tomcat, Jetty) or plain Java SE environment.

Try Weld Today

To use Weld today, download the WildFly server (formelly JBoss AS) and add the following code to the pom.xml file of your application:


For alternative ways of using Weld, see the download section or the reference documentation.

Weld Book

The latest book on Weld is now available:


  • Weld.Next

    2014-9-18: Jozef Hartinger

    Today, we released Weld 2.2.5.Final. The fifth mostly bug-fixing release in the series addresses 23 issues. In addition, the Servlet module got an update and among other things now supports: all three bean discovery modes (e.g. only explicitly annotated classes will be loaded as CDI beans) bean archive isolation using Jandex for faster deployment...

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  • Weld 2.2 (CDI 1.2 reference implementation) released!

    2014-4-15: Jozef Hartinger

    Today we released Weld 2.2.0.Final - the reference implementation of Contexts and Dependency Injection for Java EE 1.2 (CDI 1.2). Besides implementing the changes in the specification, this release comes with several new features, performance improvements and more than 50 bug fixes. CDI 1.2 CDI 1.2 is a maintenance release of the CDI...

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  • CDI 1.2 and Weld 2.2

    2014-2-4: Jozef Hartinger

    Work on a maintenance release of the CDI specification (CDI 1.2) has started recently. Now is the best time to add feedback on issues being addressed. Most of the discussion happens in the cdi-dev mailing list or the IRC channel. Weld 2.2 is going to be the reference implementation of CDI...

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