local-home or remote-home..it makes a difference on the lookup
hint: use
home = (ABTDLocalHome)context.lookup( "java:comp/env/ejb/ABTDLocalHome" )
for LocalHome
for RemoteHome
Object initialReference = context.lookup(
"ejb/jbs/ftob/ejb/td/ABTDHome" );
use jdbc for database connections only..
http://www.cs.unc.edu/Courses/jbs/lessons/enterprise/ejb_jndi/
Martin Gainty
______________________________________________
Jogi és Bizalmassági kinyilatkoztatás/Verzicht und Vertraulichkeitanmerkung/Note de déni et de confidentialité
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From: eleduardo.solis_at_gmail.com
Date: Fri, 29 Apr 2011 13:21:40 -0500
Subject: JNDI from a service bundle
To: users_at_glassfish.java.net
Hi there!
Got a question. I am trying to create an osgi service (using declarative services). what I want this service to do is to provide the JNDI lookup for the datasource and hand-out connections to other bundles and to other J2EE clients (servlet). I created the skeleton of the service and its service declaration and things work fine.
public interface IConnectionGetter {
public Connection getConnection();}
public class ConnectionGetterImpl implements IConnectionGetter { private static final String MYCLASS = ConnectionGetterImpl.class.getName();
private static Logger logger = Logger.getLogger(MYCLASS);
/*
* (non-Javadoc) * * @see com.acs.connector.IConnectionGetter#getConnection()
*/ @Override public Connection getConnection() {
String method = "getConnection"; logger.entering(MYCLASS, method);
Connection conn = null; logger.exiting(MYCLASS, method); return conn;
}}
This works fine, I can see the service in the registry and the servlet can get to it (using @Resource to get it). Now, when I actually code the JNDI lookup
public class ConnectionGetterImpl implements IConnectionGetter { private static final String MYCLASS = ConnectionGetterImpl.class.getName();
private static Logger logger = Logger.getLogger(MYCLASS);
/*
* (non-Javadoc) * * @see com.acs.connector.IConnectionGetter#getConnection()
*/ @Override public Connection getConnection() {
String method = "getConnection"; logger.entering(MYCLASS, method);
Connection conn = null; try { InitialContext context = new InitialContext();
DataSource src = (DataSource) context.lookup("jdbc/testConnection"); conn = src.getConnection();
} catch (NamingException e) { // TODO Auto-generated catch block e.printStackTrace();
} catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace();
} logger.exiting(MYCLASS, method); return conn;
}}
As soon as I add the InitialContext I get this when I deploy the bundle (autodeploy/bundles)
[#|2011-04-29T12:02:40.509-0500|SEVERE|glassfish3.1|javax.enterprise.system.std.com.sun.enterprise.server.logging|_ThreadID=96;_ThreadName=Thread-1;|java.lang.NullPointerException at com.sun.hk2.component.ExistingSingletonInhabitant.<init>(ExistingSingletonInhabitant.java:57)
at org.jvnet.hk2.osgiadapter.HK2Main$HK2ServiceTrackerCustomizer.addingService(HK2Main.java:273) at org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:896)
at org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:261) at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:233)
at org.osgi.util.tracker.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:840) at org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:871)
at org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:733) at org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:662)
at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:3769) at org.apache.felix.framework.Felix.access$000(Felix.java:80)
at org.apache.felix.framework.Felix$2.serviceChanged(Felix.java:722) at org.apache.felix.framework.ServiceRegistry.registerService(ServiceRegistry.java:107)
at org.apache.felix.framework.Felix.registerService(Felix.java:2854) at org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:251)
at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:408) at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerComponentService(AbstractComponentManager.java:419)
at org.apache.felix.scr.impl.manager.AbstractComponentManager$Unsatisfied.activate(AbstractComponentManager.java:1003) at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:298)
at org.apache.felix.scr.impl.manager.AbstractComponentManager$1.doRun(AbstractComponentManager.java:138) at org.apache.felix.scr.impl.ComponentActivatorTask.run(ComponentActivatorTask.java:67)
at org.apache.felix.scr.impl.ComponentActorThread.run(ComponentActorThread.java:96) at java.lang.Thread.run(Thread.java:662)
|#]
I found an example from Sahoo where he was doing the same lookup from an activator only his was a wab rather than just a simple bundle.
Has anyone done this or is there an article somewhere on how to do this?
Thanks!
Eduardo Solis.