WildFly, formerly known as JBoss AS, or simply JBoss, is an

application server An application server is a server that hosts applications or software that delivers a business application through a communication protocol. For a typical web application, the application server sits behind the web servers. An application ser ...

written by JBoss, now developed by

Red Hat Red Hat, Inc. (formerly Red Hat Software, Inc.) is an American software company that provides open source software products to enterprises and is a subsidiary of IBM. Founded in 1993, Red Hat has its corporate headquarters in Raleigh, North ...

. WildFly is written in

Java Java is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea (a part of Pacific Ocean) to the north. With a population of 156.9 million people (including Madura) in mid 2024, proje ...

and implements the

Java Platform, Enterprise Edition Jakarta EE, formerly Java Platform, Enterprise Edition (Java EE) and Java 2 Platform, Enterprise Edition (J2EE), is a set of specifications, extending Java SE with specifications for enterprise features such as distributed computing and web serv ...

(Java EE) specification. It runs on multiple platforms. WildFly is

free and open-source software Free and open-source software (FOSS) is software available under a license that grants users the right to use, modify, and distribute the software modified or not to everyone free of charge. FOSS is an inclusive umbrella term encompassing free ...

, subject to the requirements of the

GNU Lesser General Public License The GNU Lesser General Public License (LGPL) is a free-software license published by the Free Software Foundation (FSF). The license allows developers and companies to use and integrate a software component released under the LGPL into their own ...

(LGPL), version 2.1.

Origin

In 1999, Marc Fleury started a free software project named ''EJB-OSS'' (stands for ''Enterprise Java Bean Open Source Software'') implementing the EJB

API An application programming interface (API) is a connection between computers or between computer programs. It is a type of software interface, offering a service to other pieces of software. A document or standard that describes how to build ...

from J2EE (Java 2 Enterprise Edition).

Sun Microsystems Sun Microsystems, Inc., often known as Sun for short, was an American technology company that existed from 1982 to 2010 which developed and sold computers, computer components, software, and information technology services. Sun contributed sig ...

asked the project to stop using the trademarked ''EJB'' within its name. ''EJB-OSS'' was then renamed to ''JBOSS'', then ''JBoss'' later. On November 20, 2014, JBoss Application Server was renamed WildFly. The JBoss Community and other Red Hat JBoss products like JBoss Enterprise Application Platform were not renamed.

Features

Wildfly supports a number of features: * Jakarta Persistence (JPA) * Jakarta Enterprise Beans (EJB) * Distributed transactions - Wildfly implements the Jakarta Transactions API (JTA). *

Representational state transfer REST (Representational State Transfer) is a software architectural style that was created to describe the design and guide the development of the architecture for the World Wide Web. REST defines a set of constraints for how the architecture of ...

(REST) services. *

WebSocket WebSocket is a computer communications protocol, providing a full-duplex, simultaneous two-way communication channel over a single Transmission Control Protocol (TCP) connection. The WebSocket protocol was standardized by the Internet Engineering ...

* Clustering - Wildfly uses Infinispan as its distributed cache system

Licensing and pricing

JBoss EAP itself is open source, but Red Hat charges to provide a support subscription for JBoss Enterprise Middleware. Before November 2010 JBoss was licensed as annual subscription in bundles of 4 and 32 CPU sockets. As of November 2010 the licensing changed and all cores on the system are now counted. The core bundles licensing is available for 2, 16, and 64 cores.

Notes

References

* * 402 pp. * * 306 pp. * 496 pp. * 648 pp.

External links