How to inject EJBs with custom injector?

[christian.strempfer]

I have a distributed environment and a service locator, which can  locate all EJBs on different servers. Is it possible to use the standard @EJB-Annotation, but  make the lookup on my own?

For example:

@javax.ejb.EJB(name = "ejb/TestService")
private TestService testService;

Should trigger:

return ServiceLocator.findEJBService(TestService.class, "ejb/TestService")

My intention is to keep the deployment transparent for the developers. They can use @EJB as normal, but will end up using the service locator.

[jaikiran]

Christian, welcome to the forums.

Christian Strempfer wrote:




Should trigger:

return ServiceLocator.findEJBService(TestService.class, "ejb/TestService")

My intention is to keep the deployment transparent for the developers. They can use @EJB as normal, but will end up using the service locator.

Isn't it already transparent? I mean each developer just has to do @EJB. That's it! I'm not sure I understand the rationale behind using the ServiceLocator.

[christian.strempfer]

There are EJBs distributed across different servers, which have their own Java Naming Directories. Because of that I cannot define exactly one JNDI-URL for the lookup. The service locator is configured, so that it can determine the lookup URL.

[wdfink]

I do not understand why you will spread EJBs accross different server.

@EJB will be transparent.

A individual lookup will increase the complexity. Also you might have problems with transaction handling.

[christian.strempfer]

Thank you for your advice about transaction handling, but the deployment scenario is not up for discussion, it is a specified requirement. We have application components which may be deployed independently on different servers. Also there are components which need access to other components on more than one server.

[wdfink]

No, this is special. If you want to decide which server you want to connect the only way IMHO is to code it.

One option is a @PostConstruct initializer will fill, another one can be a Interceptor and your own annotation.