WildFly

WildFly is a free and open-source Java application server that implements Jakarta EE specifications (the evolution of Java EE). It is maintained as the community project of the JBoss ecosystem and serves as the upstream source for Red Hat JBoss EAP, the company’s commercially supported enterprise platform.

The project originated as JBoss Application Server (AS), developed by JBoss (and later the JBoss community) and acquired by Red Hat in 2006. In 2014 the community edition was rebranded as WildFly to distinguish it from the commercial EAP offering, while EAP continued to be built on top of the WildFly codebase with additional support and services.

WildFly uses a modular architecture and a lightweight, high-performance runtime. It includes the Undertow web server, a management model that exposes a Web Console and a command-line interface, and a set of subsystems for Java EE/Jakarta EE features such as CDI, EJB, JPA, JTA, and JMS. Applications are deployed as WAR, EAR, or JAR files, and WildFly provides capabilities for clustering, high availability, transactions, security, and centralized administration.

As an enterprise-grade application server, WildFly is widely used for deploying Java applications in on-premises or cloud environments and is commonly run inside containers. It remains actively developed with regular releases and serves as the community-driven base for Red Hat’s supported EAP product.