Resource injection and resolution

Question

I'm using WildFly 8.1 application server and need to obtain EJB which is located on remote GlassFish server. What kind of options do I have? What I was thinking about is to manually create InitialContext, provide necessary properties like GlassFish addres etc. Is there any better solution? Can I obtain this EJB through annotation like @Resource?

score 0 · Answer 1 · answered Jun 29 '14 at 08:16

I think this should answer your question:

Client access to an enterprise bean that implements a remote business interface is accomplished through either dependency injection or JNDI lookup.

To obtain a reference to the remote business interface of an enterprise bean through dependency injection, use the javax.ejb.EJB annotation and specify the enterprise bean’s remote business interface name:

@EJB Example example; To obtain a reference to a remote business interface of an enterprise bean through JNDI lookup, use the javax.naming.InitialContext interface’s lookup method:

ExampleRemote example = (ExampleRemote) InitialContext.lookup("java:global/myApp/ExampleRemote");

http://docs.oracle.com/javaee/6/tutorial/doc/gipjf.html

score 0 · Answer 2 · edited May 23 '17 at 12:11

In addition to the first answer, it's important to note that the remote EJB must implement an @Remote interface:

  @Remote
  public interface RemoteEJB

Given the above implementation on the remote EJB, you could just have the following in your remote client:

  @EJB
  RemoteEJB remoteEJB;

Can I obtain this EJB through annotation like @Resource?

I don't believe you can. @Resource is best used for ancillary artifacts like javax.sql.DataSources, JMS message queues and JavaMail sessions.

Tip: Using the InitialContext is more expensive in JNDI lookups. According to this answer by a member of the Java EE Expert Group, using the SessionContext gives better performance in looking up context resources.

Resource injection and resolution

2 Answers2