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When the project moved to Source Forge in 2002 an Apache Tomcat integration was created. Again rather than follow what most in the industry were doing and putting Tomcat into OpenEJB, the project decided to follow its vision and provide an integration that allowed Tomcat users to plug in OpenEJB to gain EJB support in the Tomcat platform.
EJB is a server-side software component that encapsulates business logic of an application. An EJB web container provides a runtime environment for web related software components, including computer security, Java servlet lifecycle management, transaction processing, and other web services. The EJB specification is a subset of the Java EE ...
Apache TomEE (pronounced "Tommy") is the Enterprise Edition of Apache Tomcat (Tomcat + Java/Jakarta EE = TomEE) that combines several Java enterprise projects including Apache OpenEJB, Apache OpenWebBeans, Apache OpenJPA, Apache MyFaces and others. [3]
Apache Tomcat (formerly Jakarta Tomcat) is an open source web container available under the Apache Software License. Apache Tomcat 6 and above are operable as general application container (prior versions were web containers only) Apache Geronimo is a full Java EE 6 implementation by Apache Software Foundation. Enhydra, from Lutris Technologies.
Jakarta Contexts and Dependency Injection (CDI) is a specification to provide a dependency injection container; Jakarta Enterprise Beans (EJB) specification defines a set of lightweight APIs that an object container (the EJB container) will support in order to provide transactions (using JTA), remote procedure calls (using RMI or RMI-IIOP ...
It provides a "pure Java" HTTP web server environment in which Java code can also run. Thus it is a Java web application server, although not a full JEE application server. Tomcat is developed and maintained by an open community of developers under the auspices of the Apache Software Foundation, released under the Apache License 2.0 license.
However, developers do not need an EJB container or a Java EE application server to run applications that use this persistence API. [4] Future versions of the Java Persistence API will be defined in a separate JSR and specification rather than in the EJB JSR/specification.
(The underlying interaction between the EJB Server and the TM is transparent to the application; the burden of implementing transaction management is on the EJB container and server provider. [1]) The code sample below illustrates the usage of UserTransaction via bean-managed transactions in an EJB session bean: