What is an EJB, and what does it do? - Stack Overflow
The lifecycle of EJBs is container managed. As required, it creates EJB instances, clears and initializes stateful session bean state, passivates & activates, and calls lifecycle callback …
java - What does the @EJBs annotation do? - Stack Overflow
I had a web project, jee 6, with ejbs in it and i didnt have to specify name attribute with @EJB, once I moved ejbs to separate ejb jar (still same ear) weblogic 12.1.2 tells me "The ejb-ref …
What is the difference between @Inject and @EJB
2016年5月10日 · Yes, the CDI container knows whether a type is an EJB interface, so it will still coordinate with the EJB container to obtain an EJB proxy, which allows the EJB container to …
jpa - Testing an EJB with JUnit - Stack Overflow
2011年6月24日 · It can take a little while to adjust to the mindset of testing behavior using stubs, but it is a very powerful technique for testing the business logic of your EJB 3.1 beans …
EJB @Schedule wait until method completed - Stack Overflow
2016年10月7日 · "the second bean is needed because EJB 3.1 does not allow upgrading a read lock to a write lock" - It's not so much that it is unsupported, it is inherently impossible to do …
Difference between Java Bean and Enterprise Java Beans?
An EJB (Enterprise Java Bean) is much more complex They only reside in application servers that handle EJBs (Tomcat doesn't hold EJBs). There are 3 types of EJBs: Session: Usually contain …
Examples or Uses Cases to explain EJB Transaction Attributes
2011年5月27日 · There are some good explanations of EJB Transaction Attributes (and annotations) out there, for example, OpenEJB's. But sometimes when I try to cover this with …
How to deploy EJB based application on Tomcat - Stack Overflow
2016年2月4日 · That said, as the others indicated. Tomcat is only a Servlet container. It provides Servlet and JSP, nothing more. If you want modern Java conveniences like JSF, EJB and JPA …
EJB - How to use CRUD code with multiple Persistence Units
2012年8月24日 · OK, I understand now and it is a perfect solution when using one persistence unit only. When I have many EJB modules and each one has its own persistence unit, I should …
How to solve transaction timeout due to heavy db call inside a …
2020年9月4日 · For Bean Managed Transactions, you can use the method setTransactionTimeout of the UserTransaction interface to set the timeout, for Container …