About EJB

1-10 of 78Refresh
Tutorial
320

Step 3: Define an EJB Session Bean

Operations on the database will be performed by an instance of a session bean (EJB) class ... ) > Session Bean and clicking Next. Enter GuestDao as the EJB class name - use exactly that case sensitive class name. The Java package name should be guest. Click Finish to create the new session bean (EJB
Tutorial
318

Step 3: Define an EJB Session Bean

Operations on the database will be performed by an instance of a session bean (EJB) class ... the new session bean (EJB) class. Now replace the content of the new source file with the following code: package guest; import java.util.List; import javax.ejb.Stateless; import javax
Tutorial
55

Java EE 6 Web Tutorial

This tutorial demonstrates how to create and run a full Java EE 6 MVC (Model View Controller) web application using GlassFish, ObjectDB and JPA. Since this web application uses Java EE 6 EJB (session beans) it requires a full Java EE 6 application server, such as GlassFish 3.0.1 or JBoss AS 6
Forum
45

system exception occurred during an invocation on EJB GuestDao

during an invocation on EJB GuestDao, method: public java.util.List guest.GuestDao.getAllGuests() 2014-09-01T19:09:01.324+0200|Avertissement: javax.ejb.EJBException at com.sun.ejb.containers ... .ejb.containers.EJBContainerTransactionManager.completeNewTx(EJBContainerTransactionManager.java:698
Tutorial
39

Eclipse/JPA Java EE 6 Tutorial

Step by step tutorial that demonstrates how to build a simple Java EE web application (with Servlet, JSP and an EJB Session Bean) in Eclipse using JPA.
Tutorial
39

NetBeans/JPA Java EE 6 Tutorial

Step by step tutorial that demonstrates how to build a simple Java EE web application (with Servlet, JSP and an EJB Session Bean) in NetBeans using JPA.
Tutorial
35

Step 4: Add a Servlet Class

javax.ejb.EJB; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet ... ; // Injected DAO EJB: @EJB GuestDao guestDao; @Override protected void doGet ... automatically (since the field is marked with the @EJB annotation). The next step is adding a JSP
Tutorial
35

Step 4: Add a Servlet Class

; import java.io.IOException; import javax.ejb.EJB; import javax.servlet.ServletException ... final long serialVersionUID = 1L; // Injected DAO EJB: @EJB GuestDao guestDao ... the application server into the guestDao field automatically (since the field is marked with the @EJB
Forum
33

ObjectDB with JRebel: copious 'Not Enhanced:' errors with EJBs

log output for nearly every @EJB on startup. Typical message is like: Info: [2016-10-30 09:16:46 #6 enhancer.agent] Not Enhanced: com/example/ejb/query/__EJB31_Generated__ExampleQuery__Intf__: com.objectdb.o.TEX: Type com.example.ejb.query.__EJB31_Generated__ExampleQuery__Intf__ is not found
Issue
31

Once served to JSF page via @EJB query bean, many list fields are null (but same query ok after fresh persist in @PostConstruct)

via a querying @EJB gives many fields null (and not even empty, I mean truly null). In the following ... . When I serve the query via and @EJB TestQuery and @RequestScoped Page JSF to a simple XHTML page ... either empty or populated are served as null (!). The query is performed by an @EJB: @Stateless public class