Is EJB3.0 supporting ServiceLocator design pattern

Yap there is EJB 3.0 supporting ServiceLocator.. You must think how to get a handle of EJB for Localhome or Remote. It means to support for the services like Web Services, JMS Messaging in a seperate way and you must instance him refer to the support you need..

Example for this..

public class ServiceLocator {

....

//Get EJB Localhome Services

public EJBLocalHome getLocalHome(String jndiHomeName) throws ServiceLocationException{

EJBLocalHome localhome = null;

try{

if(cache.containsKey(jndiHomeName)){

localhome = (EJBLocalHome)cache.get(jndiHomeName);

}else{

localhome = (EJBLocalHome)initialContext.lookup(jndiHomeName);

cache.put(jndiHomeName, localhome);

}

}catch(NamingException cex){

throw new ServiceLocationException(cex.toString());

}catch(Exception ex){

throw new ServiceLocationException(ex.toString());

}

return localhome;

}

//Get EJB RemoteHome Services

public EJBHome getRemoteHome(String jndiRemoteHome, Class homeclassname) throws ServiceLocationException{

EJBHome remotehome = null;

try{

if(cache.containsKey(jndiRemoteHome)){

remotehome = (EJBHome)cache.get(jndiRemoteHome);

}else{

Object objref = (EJBHome)initialContext.lookup(jndiRemoteHome);

Object obj = javax.rmi.PortableRemoteObject.narrow(objref, homeclassname);

remotehome = (EJBHome)obj;

cache.put(jndiRemoteHome, remotehome);

}

}catch(NamingException ne){

throw new ServiceLocationException(ne.toString());

}catch(Exception ex){

throw new ServiceLocationException(ex.toString());

}

return remotehome;

}

.........

}

CJ_125a at 2007-7-29 12:44:57 >