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Questions tagged [ejb]

Enterprise JavaBeans (EJB) is a managed, server-side component architecture for modular construction of enterprise applications. The EJB specification is one of several [Java] APIs in the [Java EE] specification.

Enterprise JavaBeans (EJB) is a managed, component architecture for modular construction of enterprise applications which runs on an . The EJB specification is one of several APIs in the specification.

See also and

Tutorials

JBoss 4 EJB 3 Tutorial

JBoss 5 EJB 3 Tutorial

Video Tutorials

EJB Video Training

Reference :

Wikipedia

Oracle

6693 questions
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Where is it all allowed to inject EJB?

Is it possible to inject an EJB into any class? And who performs the injection - EJB container or the container of the classes that contain EJB annotation?
gicig
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Quartz is not participating in EJB transactions (in CMT mode)

I integrated Quartz2.2.2 with my Java EE application which is running in Weblogic 12.1.2. I want to handle all JTA transactions with my container (Weblogic). But when an exception is occurred everything is rollbacked except for quartz transactions,…
Ali Abazari
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How to exclude WEB-INF/libs from being deployed in wildfly

I am installing a war file in a Wildfly. The package contains EJB and WS. The dependencies are located in myWar.war/WEB-INF/lib. My EJBs (annotated with @Stateless) located in myWar.war/WEB-INF/classes are correctly scanned by wildfly and…
loonis
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No EJBContainer provider available: no provider names had been found

I'm getting the following exception on running a test case, for my service class. javax.ejb.EJBException: No EJBContainer provider available: no provider names had been found. at…
Nidheesh
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Why update query is running automatically in OpenJpa when I am running only select query

I have developed a rest web service which is using Open Jpa 2.1 , deployed in TomEE. My problem is , when I am running select query a update query is getting run in table i can see that in log. I have noticed when I Iterate through the result list…
Arvind
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JPA and EJB - When do I need to use transaction?

I'm learning persistence in Java following some tutorial. I'm using Java EE 7 and Payara server. I noticed that each uses a different method for persistence. Examples: simple @Stateless public class BookServiceBean implements BookService { …
Marco
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Weblogic EJB deployement: classes in jar inside ear are not accessible

I'm trying to deploy an ear containing an ejb application into a weblogic 9.2 server. This ear is created using maven (itself using the ear ant task). Maven produces the following structure: myApp.ear - META-INF - application - MANIFEST.MF -…
Guillaume
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Enterprise OSGi vs. EJB

i have an application server (JBoss) with some EJBs deployed. Now i must develop an OSGi application which i would like to reuse with my application server. I know that new application servers allows to deploy OSGi bundles in the application server…
Slava Schmidt
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unable to use interceptor binding interface with @Target({METHOD, TYPE}) for post construct methods?

I am trying to define a logger interceptor with an interceptor binding interface : @Inherited @InterceptorBinding @Retention(RUNTIME) @Target({METHOD, TYPE}) public @interface OperationLogger { @Nonbinding public String operationName()…
Hamid Adldoost
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JNDI No EJB receiver available for handling

I have a problem with my EJBTest. I have installed WildFly and configured user management and application management. I wrote an EJB 3.0 and deployed it: @Stateless @Remote(NewSessionBeanRemote.class) public class NewSessionBean implements…
reve
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EJB: custom authentication and authorisation

I’m trying to add my own authentication and authorisation to Java EE REST application. I’ve managed to get working version with JAX-RS’s SecurityContext, ContainerRequestFilter implementation (with JWT) and @RolesAllowed annotations on end-point…
Jakub Wojnowski
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How EJB 3.X Stateful session bean maintains state?

I am kind of new to EJB. I have understanding how HTTPSession is maintained (all cookies funda). All the resource in the internet says " Stateful Session Bean Maintenance session(remembers client). But I could not find answer to How Stateful…
Malatesh
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Problem with WebServices using EJB. The error is: "..does not contain operation meta data.."

I got an error as I mentioned above. My application has EJB WebServices, developing with MyEclipse and running on jboss4.2.2.GA. I use Eclipse's Web Services Explorer to invoke a WSDL operation. When I enter the parameters for the wsdl and click Go…
javatar
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Jboss 4.2.0 GA Cluster can not work

I'm new to Jboss and EJB. I'm trying to form a Jboss cluster with 2 instances and connect the cluster from tomcat, all the Jboss instances and tomcat run on one machine. The problem is the 2 instances of Jboss can form a cluster, but tomcat…
Maxwell
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Remote EJB call vs Local EJB call performance in same JVM

I was trying to find out if there is any difference when I am calling a service through its local interface / remote interface in performance within the same JVM. Based on this…
erik.c
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