Is it possible to use @EJB annotation to inject EJBs through different servers?

问题

I have 2 session beans, OrderBean and InventoryBean which are deployed at different weblogic servers.

The OrderBean needs to access the InventoryBean to check if the supply is sufficient.

Currently, I use JNDI look up to locate the InventoryBean and it works fine.

Now I'm wondering if it is possible to use @EJB to inject InventoryBean by providing the JNDI name and the URL in xml or somewhere else.

回答1:

Finally I found a way to do this.

i. Configure the foreign JNDI on the weblogic server and link the remote EJB to a local JNDI name.

For example:

Local JNDI:
InventoryBean#com.pkg.InventoryBean (MAPPEDNAME#FULLNAME)
link to
Remote JNDI:
ServiceBean#com.pkg.InventoryBean 

ii. Configure ejb-ref in ejb-jar.xml

ejb-ref-name -> ejb/InventoryBean
remote -> com.pkg.InventoryService
mapped-name -> InventoryBean

iii. Add the @EJB annotation in OrderBean

@EJB(name = "ejb/InventoryBean")
private InventoryService inventoryService;

回答2:

I think it is not possible through EJB annotations, but you can configure foreign JNDI on your WebLogic server and refer to your remote EJB as a local JNDI name. Though, I never tried that, but I think it should work.

回答3:

It is very AS-specific.

JBoss 7+ makes it possible if you:

1. Define outbound-socket-binding, security-realm and remote-outbound-connection in the standalone file (all referring to the remote JBoss instance).
2. Add a jboss-ejb-client.xml to the META-INF folder of your packaged application, with a remoting-ejb-receiver for every connection needed by the application.
3. Inject the remote EJB with@EJB(lookup = "<jndi_name>")

Let me know if further details are needed.

Give a look at:

• JBoss configuration for remote connections
• An article about Glassfish-Glassfish remote connections

来源：https://stackoverflow.com/questions/1560335/is-it-possible-to-use-ejb-annotation-to-inject-ejbs-through-different-servers