Hello!
I'm trying to access a HA Singleton MBean from session EJBs but experiencing a problem
which really makes me ill. First the EJB looks up the RMIAdaptor:
| Properties properties = new Properties();
| properties.put(Context.INITIAL_CONTEXT_FACTORY,
"org.jnp.interfaces.NamingContextFactory");
| properties.put(Context.URL_PKG_PREFIXES, "org.jboss.naming:org.jnp.interfaces");
| properties.put(Context.PROVIDER_URL, "jnp://localhost:1100");
| try
| {
| Context context = new InitialContext(properties);
| Object o = context.lookup("jmx/invoker/RMIAdaptor");
| mbeanServer = new RMIConnectorImpl((RMIAdaptor) o);
| }
| catch (NamingException e)
| {
| handleException(e);
| }
|
Then I test wheter the singleton service is registered before invoking methodes on the
service:
| ObjectName name = new ObjectName("myDomain:service=MyService");
| Boolean ok = mbeanServer.isRegistered(name);
| if (ok)
| {
| Object result = mbeanServer.invoke(...);
| }
|
The problem is on the nodes which are currently not master. As expected
"isRegistered()" returns false and I can't invoke the MBean. On the node which is
master everything works fine.
And now, most incomprehensible to me is that nearly the same code put in a simple test
class works really ok:
| String port = "1100";
| String[] clusterMembers = {"192.168.2.10", "192.168.2.25", "192.168.2.30"};
| ObjectName name = new ObjectName("myDomain:service=MyService");
| RemoteMBeanServer server = null;
| int i = 0;
| while (i < hosts.length)
| {
| properties.put(Context.PROVIDER_URL, "jnp://" + hosts + port);
| Context context = new InitialContext(properties);
| Object o = context.lookup("jmx/invoker/RMIAdaptor");
| server = new RMIConnectorImpl((RMIAdaptor) o);
| if (server.isRegistered(name))
| {
| System.out.println(i + " " + clusterMembers + " " +
server.isRegistered(name));
| System.out.println(server.getAttribute(name, "MasterNode").toString());
| }
| i++;
| }
|
For every loop the isRegistered() returns true and "MasterNode" is also true. The
conclusion to me is that for the EJB I get somthing like a "local" RMIAdaptor with the
HA singleton service available only on the master node. For the test class, started in
another VM, I always get something like a "global" RMIAdaptor with the HA singleton
service available.
Is that correct? Or do I completely mixed something up.
And most importantly: What is the "safe" way to access HA singleton MBean from EJBs.
(Please note that all the nodes really build ONE cluster, i.e. they find each other
and I can see messages on the console telling me that too.)
Thanks a lot for your answers.
Oh, I forgot to say that I use V3.2.6RC1.
Thorsten
View the original post :
http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3845358#3845358
Reply to the post :
http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=3845358
-------------------------------------------------------
SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media
100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33
Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift.
http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285
_______________________________________________
JBoss-user mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/jboss-user
