EJB and Spring

[gar56]

great article, i like it.

gar

[jeanpaul11919]

I want to know that what is Java Beans and how it works and how can i use it to improve the programming using Java beans

To have services of Best Dentist In Pune

[Ronaldo Veras]

I'm implementing the migration task from an ear JBoss application to Spring stand-alone jar batch (Dependency Injection). The problem is: the value of name attribute in @Stateless(name="Bean") is not localized in the Bean Factory when the annotation @EJB(name="Bean") verifies this reference in another EJB.

This problem is resolved when the annotations (@EJB) contains no name attribute. What is happen? The pitchfork project (http://www.springsource.com/pitchfork) also uses the annotations without the name attributes. Some idea?

This example shown the problem:

@Stateless(name = "BeanB")
public class BeanB implements IBeanB {

@EJB(name="GenericDAO")
private GenericDAO<Type> genericDAO;

...
}

@Stateless(name = "BeanA")
public class BeanA implements IBeanA {

@EJB(name="BeanB")
private BeanB dao;

...
}

Caused by: org.springframework.beans.factory.NoSuchBeanDefini tionException: No bean named 'BeanB' is defined
at org.springframework.beans.factory.support.DefaultL istableBeanFactory.getBeanDefinition(DefaultListab leBeanFactory.java:527)
at org.springframework.beans.factory.support.Abstract BeanFactory.getMergedLocalBeanDefinition(AbstractB eanFactory.java:1087)
at org.springframework.beans.factory.support.Abstract BeanFactory.doGetBean(AbstractBeanFactory.java:278 )
at org.springframework.beans.factory.support.Abstract BeanFactory.getBean(AbstractBeanFactory.java:198)
at org.springframework.context.annotation.CommonAnnot ationBeanPostProcessor.autowireResource(CommonAnno tationBeanPostProcessor.java:440)
at org.springframework.context.annotation.CommonAnnot ationBeanPostProcessor.getResource(CommonAnnotatio nBeanPostProcessor.java:414)
at org.springframework.context.annotation.CommonAnnot ationBeanPostProcessor$EjbRefElement.getResourceTo Inject(CommonAnnotationBeanPostProcessor.java:696)
at org.springframework.beans.factory.annotation.Injec tionMetadata$InjectedElement.inject(InjectionMetad ata.java:147)
at org.springframework.beans.factory.annotation.Injec tionMetadata.inject(InjectionMetadata.java:84)
at org.springframework.context.annotation.CommonAnnot ationBeanPostProcessor.postProcessPropertyValues(C ommonAnnotationBeanPostProcessor.java:302)
... 29 more

[jokrasa]

I am looking for a way to setup a test suite for a site that is using EJB-JSF-Hibernate and was hoping to hook into the EJBs using SpringSecurity... would I be able to add spring integration easily ? I see Part III 9. testing and Part VI Integration 20. EJBs that it looks doable but was wondering how hard that would be ?

Can you mix Spring and JSF configurations? Usually you put your test src code in a test pkg alongside the main... would I have to run another 'spring module' configured alongside the code I want to test?

Hoping for some insight, any responses welcome (Thx) !

P.S. Are there any examples out there of doing this ?

[francisfleming]

fgfchfgjhgjghjkkjhk

[emankady]

thumps up

[emankady]

it`s very important info



TurkishTranslation

[Turkish Transalation]

nice topic i like it

Turkish Translation

[techieman]

As a lightweight container, Spring is often considered an EJB replacement. We do believe that for many if not most applications and use cases, Spring as a container, combined with its rich supporting functionality in the area of transactions, ORM and JDBC access, is a better choice than implementing equivalent functionality via an EJB container and EJBs.

However, it is important to note that using Spring does not prevent you from using EJBs. In fact, Spring makes it much easier to access EJBs and implement EJBs and functionality within them. Additionally, using Spring to access services provided by EJBs allows the implementation of those services to later transparently be switched between local EJB, remote EJB, or POJO (plain old Java object) variants, without the client code having to be changed.

In this chapter, we look at how Spring can help you access and implement EJBs. Spring provides particular value when accessing stateless session beans (SLSBs), so we'll begin by discussing this.

[michal26]

EJB stands for Enterprise Java Beans and it is used in distributed applications that typically contains the business logic.