Top "Ejb" questions

Enterprise JavaBeans (EJB) is a managed, server-side component architecture for modular construction of enterprise applications.

Can we use ejb-jar.xml instead of annotations for MessageDrivenBean(MDB) in EJB 3.0?

I've configured the message destination type, name etc using @ActivationConfigProperty in EJB 3.0 but I wanted to configure the MDB using …

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ejb ejb-3.0 jboss6.x message-driven-bean
JavaBeans (EJB) module does not have any enterprise beans configured

I am trying to deploy EAR file on WebShpere 8.5 and I keep getting this error: com.ibm.ejs.container.EJBConfigurationException: …

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java ejb websphere-8
GlassFish Error: JAX-RS EJB support is disabled

I am trying a simple app using Jersey JAX-RS + EJB 3.1 on GlassFish 3.1.2.2. All seemed to look pretty well with Jersey …

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rest glassfish ejb jersey
Differences : @SessionScoped vs @Stateful and @ApplicationScoped vs @Singleton

I would like to know, what are the principal differences between : javax.enterprise.context.SessionScoped and javax.ejb.Stateful javax.…

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java singleton ejb stateless stateful
Returning an entity via remote EJB results in - java.lang.NullPointerException at com.sun.corba.ee.impl.orbutil.ClassInfoCache$ClassInfo.<init>

I'm trying to create an enterprise web application in the following environment. NetBeans 7.2.1 Glassfish Server 3.1.2 (containing the Servlet 3.0 API) EJB 3.1 …

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jakarta-ee glassfish ejb corba
Declare a resource-ref in EJB

This is how they declare a resource-ref in ejb-jar.xml : <enterprise-beans> <session> <ejb-name>ResourceBean&…

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ejb jndi websphere-6.1 ejb-jar.xml
Why does CMT commit on exit of EJB method, when transaction attribute is "Required"?

I am consistently finding that my already-existing transaction is getting committed inside any method of an EJB marked @ejb.transaction …

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jakarta-ee transactions ejb java-ee-6 ejb-3.1
use JTA transaction or not?

I am developing a J2EE application which is deployed on JBoss application server. The application is composed of an …

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transactions jakarta-ee ejb jta
Difference between MDB and JMS

Please let me know what is the difference between: Message Driven Beans (MDB) Java Message Service (JMS)

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jakarta-ee ejb jms ejb-3.1
Default Attributes in EJB Transactions

I ma reading the java ee docs and I would like to ask a couple of question to be sure …

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jakarta-ee transactions ejb