1 Reply Latest reply on Dec 17, 2008 4:23 AM by rheydenr02

locate services with service locator?

rheydenr02 Dec 12, 2008 4:27 AM

Hi all,
I have some servlets (lets say, ServA and ServB) on my JBoss 4.2.2.GA. Now I want to use the ServB from ServA. Both Servlets are registered in JNDI. The only way that works is a JNDI lookup in ServA to ServB. Injection via @Resource doesn't work. The old ServiceLocator pattern doesn't work, too (because no EJBHome exists).

Is there a convenient method to write a generic service locator class which locates a given service and returns the correct service interface? One way I've tried is the ServiceLocator package from ALR, but this package is in a raw state and I didn't know how to use it (which configuration is needed). Any suggestions are welcome. The topics in this forum refer mostly to JSF or such things, which I don't need.

TIA,
Ralf.

1. Re: locate services with service locator?

rheydenr02 Dec 17, 2008 4:23 AM (in response to rheydenr02)

I found my own solution:

 @SuppressWarnings("unchecked")
 public <T> T lookup(Class<T> clazz, final String pJndiName) {
 T cs = null;
 String jndiName = (pJndiName == null)
 ? jndiPrefix + clazz.getSimpleName() + "Bean/remote"
 : pJndiName;

 LOG.debug("Looking for "+jndiName);
 try {
 Object o = context.lookup(jndiName);
 if (o == null) {
 System.err.println("unable to find " + jndiName);
 } else {
 System.out.println("retrieved instance of "
 + o.getClass().getName());
 }
 cs = (T) PortableRemoteObject.narrow(o, clazz);

 } catch (NamingException e) {
 e.printStackTrace();
 }
 return cs;
 }

Errorhandling has to be improved, but this version works for me.