- 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 methods, so EJB code can participate in lifecycle operations to acquire and release resources, or perform other initialization and shutdown behavior
- 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 does not have an ejb-link and the JNDI name of the target Bean has not been specified" –
- What is the difference between @Inject and @EJB
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 control the actual bean lifecycle, and then the CDI container will wrap the EJB proxy with a CDI proxy as needed (e g , contextual proxy is meaningless for a stateless bean but meaningful for a stateful bean)
- What is the meaning of @ejb annotation in java? [duplicate]
Application servers support bindings at deployment time This is usually implemented by performing a lookup If no other binding information is provided and the bean interface (beanInterface or the field type) is only implemented by a single EJB in the application, then the EJB specification requires that it fall back to that
- Web Services vs EJB vs RMI, advantages and disadvantages?
Between EJB and RMI, EJB would certainly be better - it has everything RMI has and much more via the container (object pooling, transaction management, etc ) Between EJB and web services, web services would give you more portability if you want to be able to call them from non-java apps in the future
- java - What is difference between JPA Project and EJB Project in . . .
Enterprise JavaBeans (EJB) is a Java API developed by Sun Microsystems that defines a component architecture for multi-tier client server systems EJB systems allow developers to focus on the actual business architecture of the model, rather than worry about endless amounts of programming and coding needed to connect all the working parts
- ejb - How to call session bean from jsp - Stack Overflow
So there is nothing conceptually wrong with accessing an EJB in a JSP Secondly, sometimes you need information from an EJB in order to set up the page I have that situation I need a list of values from an EJB to set up a drop down list So thanks for including the correct syntax in your other answer –
- java - Service layer EJB null pointer exception - Stack Overflow
The problem is in EJB side The visitService is properly been injected, however inside the visitService itself, the visitDao is not properly been injected You didn't show all the code, but most likely you've a
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