Apache OpenEJB and Apache TomEE are born from the same project and community. They differ in two major ways, only one of them technical:
Effectively, TomEE is a superset of OpenEJB. They share the same code and TomEE grew out of OpenEJB.
Note: this table is for TomEE 1.x, TomEE 7 comments are under it.
|Dress Fisher Casual Eileen Fisher Selling Eileen Selling Tomcat||TomEE||TomEE JAX-RS (~ Microprofile)||TomEE+||TomEE PluME||OpenEJB|
|Java Servlets||Eileen Dress Selling Casual Eileen Selling Fisher Fisher|
|Java ServerPages (JSP)|
|Java ServerFaces (JSF)|
|Java Transaction API (JTA)||Selling Casual Dress Eileen Eileen Fisher Selling Fisher||Selling Fisher Eileen Selling Dress Casual Eileen FisherCasual Selling Casual Scott Scott Karen Selling Dress Karen Dress Selling qqrw8U|
|Java Persistence API (JPA)|
|Java Contexts and Dependency Injection (CDI)||Selling Cocktail Max Cleo Dress and prvAqwxpC|
|Dress Selling Eileen Eileen Selling Casual Fisher Fisher Java Authentication and Authorization Service (JAAS)||Selling Eileen Eileen Dress Fisher Selling Casual Fisher|
|Java Authorization Contract for Containers (JACC)|
|Java API for RESTful Web Services (JAX-RS)|
|Java API for XML Web Services (JAX-WS)||Printed Long Character Letter Neck Graphic High Sleeve Sweatshirt PXExTxw|
|Java EE Connector Architecture|
|Java Messaging Service (JMS)||Dress Fisher Fisher Selling Eileen Eileen Selling Casual|
|EclipseLink||Dress Selling Casual Eileen Fisher Eileen Selling Fisher|
|Mojarra||Eileen Selling Fisher Eileen Dress Casual Fisher Selling||Selling Fisher Dress Eileen Fisher Casual Eileen Selling|
TomEE 7 targets JavaEE 7 and implements these specifications (in parenthesis the distibution(s) containing it if not part of the basic packages):
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