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Questions tagged [stateless-session-bean]

A session bean encapsulates business logic that can be invoked programmatically by a client over local, remote, or web service client views. More specifically, a stateless session bean does not maintain a conversational state with the client, so it is mostly used as a service(e.g. rest api, persistence-retrieval) and does specific job without the need of keeping a state.

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NullPointerException when calling session bean from Thread

I have some problem with my simple exercise program. I want to call a session bean from thread but it become NullPointer exception! but if I call it from a main thread it can run normally this is warning and exception Warning: C:\Documents…
cherry
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EJB reinjected all dependencies before each business method call

This question is not a doubt, in truth is a tip. Did you know that a session EJB reinjected all dependencies before each business method call? Well, I didn't know until few minutes ago and it gave me a big headache. I thought that the dependency…
Marlon Patrick
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Encapsulating stateless beans inside a stateful session

I have a Java EE application using EJBs, and perform most of the functions through Stateless EJBs. I have a requirement for all users to also have an active session, and I'm wondering what the best way of using the beans are. Currently, I have a…
Antix
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Parameter passing through remote session bean to DTO/DAO service backend

I'm relatively new to developing on JavaEE. I'm wondering what the best format is in terms of passing parameters into a session bean for object creation or deletion calls. For my backend, I use a DTO with a DAO to run create, update, delete and read…
Antix
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lookup EJB in member instantiate

i have an issue of saving a reference to an EJB as a member from a non EJB class (which is used as static member in an EJB) say i have @EJB(...) @Stateless public Class SessionBean implements MySession{ protected static MyHelper helper = new…
Yoni
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injecting Session bean from another session bean in JBoss 7.1

I am not able to inject a SLSB in another SLSB. Actually created 3 projects 1) created a EJB project with an MDB 2) created a EJB project with a stateless session bean for posting the message 3) created a EJB project with a stateless session bean…
kalyani l
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MongoDB JavaEE Singleton Extra Instances

So, i've been having this small issue while attempting to use MongoDB (And java driver), using Servlets EJBs and EJB Timers, running on Jboss 4.2.3. I create a mongo singleton like so private static Mongo mongoSingleton = null; private…
user2351681
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only one stateless bean created

I created one session bean and invoke it method in servlet like this: @WebServlet(name = "NewServlet1", urlPatterns = {"/NewServlet1"}) public class NewServlet1 extends HttpServlet { @EJB NewSessionBean bean; protected void…
user2219773
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Creating a new session Bean in javaee6

Please, I tried to add a simple session Bean to my javaee6 project and when I right clicked on the project->EJB->session Bean as shown on this link: and clicked next, I got to the next link: Everything was ok but i can't add the project's name.…
helpdesk
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stateful bean behaving like a stateless bean

I'm new to EJB and try to write a implementation for EJB stateful bean but when I try to do the transaction its returning like a stateless bean package beanpackage; import javax.ejb.Stateful; //import javax.ejb.Stateless; /** * Session Bean…
user1272855
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Is it true that the session bean in Java EE can create a Shopping Cart like session in ASP

When I make a commercial website in ASP, I use the session to keep the items in shopping cart even the customer close the website (when they come back, all items still in their cart). I am reading about Java EE, especially about stateless and…
MasterDark116
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the method doesn't add daa in the database

i'm working on an ejb 3.0 tutorial and i want to add data to the database when i set run it doesn't indicate any error and it doesn't add the following data in the db either : this is the session bean code : public String creerCompte(CompteBancaire…
marcAntoine
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JNDI lookup - Is it a correct way in my app?

I am writing an application in Java and I have some REST web services there. My application has following structure: http://cl.ly/L7Pv/o REST web service classes are Stateless session beans. It works like charm. But Classes in red on the picture…
Macejkou
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inject specific EntityManager in stateless SessionBean on condition

I'm currently deal with web applications calling stateless Session Beans in order to interact with a database. My question is about how such application can call the same session bean in a way that the latter can choose which entity manager must use…
user1444322
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UserTransaction failed when call utx.begin() throws "java.lang.IllegalStateException: Operation not allowed"

i want to use ejb and jpa controller, in netbeans the controller is generated automatically... I try to call the jpa controller from class (UniversidadServiceEJB) that is a session bean stateless, I debugged the project and the UserTransaction and…
Will86
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