Top "Ejb" questions

No entity found for query Exception

I am executing the following lines: String queString = "some query string" Query q1 = em.createNativeQuery(queString, T03CallsLog.class); T03…

java jpa jboss ejb

Web Services vs EJB vs RMI, advantages and disadvantages?

My web server would be overloaded quickly if all the work were done there. I'm going to stand up a …

java web-services ejb distributed rmi

javax.persistence.NoResultException: getSingleResult() did not retrieve any entities

i have created a namedquery with ejb to check if the username is used. When the singleResult is null, then …

java exception ejb

EJB 3.1 @LocalBean vs no annotation

I understand the difference between local view, remote view and no-interface view. I just don't understand what is the difference …

java jakarta-ee ejb

ejb lookup failing with NamingException

I've added the following in my web.xml: <ejb-ref> <ejb-ref-name>ejb/userManagerBean</ejb-ref-name> <…

java ejb jndi

Why are data transfer objects (DTOs) an anti-pattern?

I've recently overheard people saying that data transfer objects (DTOs) are an anti-pattern. Why? What are the alternatives?

java ejb dto anti-patterns data-transfer-objects

No EJB receiver available for handling

I'm using EJB 3.0 with JBoss AS 7.1.1 Final. I am getting this error when I try to connect my client to …

jboss ejb ejb-3.0 jboss7.x

What exactly is Java EE?

I have been doing Java SE for some years now and moving on to Java EE. However, I have some …

java jakarta-ee ejb

Cannot import javax.ejb.* packages

I am having trouble in building an EJB session bean. The following packages cannot be found: import javax.ejb.LocalBean; …

java eclipse jakarta-ee ejb

Multiple writable mappings exception in EclipseLink

I have these tables: Which my intention is : A user can be a company or a person but each one …

jpa orm ejb jpa-2.0 eclipselink