8 Replies Latest reply on Oct 18, 2009 12:42 PM by ohadr

Non-proprietary connection to JBoss JMX MBeanServer

ronchalant Aug 30, 2004 1:04 PM

The RMI Adaptor gives access to the JBoss JMX MBeanServer, but is there a non-proprietary way I can directly access the server? I'm writing a client application to access my managed beans, and I don't want to tie it directly to JBoss in case we switch to another app server in production. Previously I've done this by creating a JMXServiceURL, then getting a JMXConnector and finally getting the direct connection to the MBeanServer from the connector.

I've tried to connect by building a JNDI connector URL (used in the JMXServiceURL) like this: service:jmx:rmi://localhost/jndi/jmx/rmi/RMIAdaptor

But this just returns the RMIAdaptor object, so I get a ClassCastException because it's looking for an implementation of the Server - not the proprietary JBoss adaptor. I've not found anything online, so this is my last ditch effort before I have to change my design to designate specific implementations of an MBeanServerAccessor or something.

1. Re: Non-proprietary connection to JBoss JMX MBeanServer

genman Aug 31, 2004 7:31 PM (in response to ronchalant)

Look on the Wiki. You can get a javax.management.MBeanServer which wraps the calls to the RMI adaptor.
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2. Re: Non-proprietary connection to JBoss JMX MBeanServer

ronchalant Sep 1, 2004 10:41 AM (in response to ronchalant)

Yeah but I still need to use propriety code. I can't just gain a connection to a JBoss MBeanServer using a JMXConnector (which would require a JMXConnectorServer to be running somewhere).

What I've started to try and do now is creating a JBoss-specific MBean that is a JMXConnectorServer essentially. I'd like to use the jmxmp protocol, but it doesn't seem that JBoss supports this.

It seems like JBoss doesn't make it very easy to get a connection to their MBeanServer without using any of their code or libs. I don't want to be tied to JBoss though.
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3. Re: Non-proprietary connection to JBoss JMX MBeanServer

ronchalant Sep 1, 2004 11:15 AM (in response to ronchalant)

I've actually found a way to do it. I extended the org.jboss.system.ServiceMBeanSupport class and in it I created a JMXConnectorServer. I used the JMXMP protocol, and it was failing before not because JBoss doesn't support it, but because I need to include the jmxremote_optional.jar file in my deployment lib directory.

Now I can create a JMXConnector object to connect directly to the JMXConnectorMBean, which will give me non-proprietary remote access to my MBeans on the MBeanServer.
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4. Re: Non-proprietary connection to JBoss JMX MBeanServer

raja05 Sep 2, 2004 12:50 AM (in response to ronchalant)

You could use the HTTPAdaptor as well. You probably need to tweak ur url to pass in arguments and stuff but thats definitely a workable solution.
Whatever u view through the jmx-console uses the HTTPAdaptor to do its work.
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5. Re: Non-proprietary connection to JBoss JMX MBeanServer

ronchalant Sep 7, 2004 10:11 AM (in response to ronchalant)

I could use the HTTPAdaptor, but it would only work for JBoss. I wanted to use a method that's not proprietary to any particular appserver. Creating a JMXConnectorServer and running it as a bean still requires some JBoss specific implementation, but it still provides a design for allowing remote management of MBeans by providing a generic, non-proprietary connection to the MBeanServer.
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6. Re: Non-proprietary connection to JBoss JMX MBeanServer

hengels Jan 3, 2005 9:11 AM (in response to ronchalant)

Could you please send me your code? I tried to do the same, but I keep getting ClassCastExceptions during:

 JMXConnector connector = JMXConnectorFactory.connect(url);

This is my binding code:

 JMXServiceURL url = new JMXServiceURL("rmi", null, 0);
 connectorServer = JMXConnectorServerFactory.newJMXConnectorServer(url, null, getServer());
 connectorServer.start();
 bind(jndiName, connectorServer.toJMXConnector(null));

JndiView shows:

 +- JMXConnectorServer (class: javax.management.remote.rmi.RMIConnector)

The exception:

java.lang.ClassCastException
org.concern.ControllerException: java.lang.ClassCastException
 at org.concern.j2ee.client.JMXConnector.connect(JMXConnector.java:43)
 at org.concern.j2ee.client.commandline.Concern.getController(Concern.java:80)
 at org.concern.j2ee.client.commandline.Concern.main(Concern.java:53)
Caused by: java.lang.ClassCastException
 at javax.management.remote.rmi.RMIConnector.narrowJRMPServer(RMIConnector.java:1818)
 at javax.management.remote.rmi.RMIConnector.findRMIServerJNDI(RMIConnector.java:1813)
 at javax.management.remote.rmi.RMIConnector.findRMIServer(RMIConnector.java:1777)
 at javax.management.remote.rmi.RMIConnector.connect(RMIConnector.java:259)
 at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:248)
 at javax.management.remote.JMXConnectorFactory.connect(JMXConnectorFactory.java:207)
 at org.concern.j2ee.client.JMXConnector.connect(JMXConnector.java:36)
 ... 2 more

thanks in advance,

Holger

7. Re: Non-proprietary connection to JBoss JMX MBeanServer

hengels Jan 3, 2005 12:10 PM (in response to ronchalant)

"hengels" wrote:
This is my binding code:

 JMXServiceURL url = new JMXServiceURL("rmi", null, 0);
 connectorServer = JMXConnectorServerFactory.newJMXConnectorServer(url, null, getServer());
 connectorServer.start();
 bind(jndiName, connectorServer.toJMXConnector(null));

Found out myself. The binding was wrong. Don't put the jmx connector into jndi but the javax.management.remote.rmi.RMIServer:

 JMXServiceURL url = new JMXServiceURL("service:jmx:rmi:///jndi/JMXConnectorServer");
 connectorServer = JMXConnectorServerFactory.newJMXConnectorServer(url, null, getServer());
 connectorServer.start();

8. Re: Non-proprietary connection to JBoss JMX MBeanServer

ohadr Oct 18, 2009 12:42 PM (in response to ronchalant)

hi
did u get the code? i am interested as well...
im trying to do the same...
btw - onchalant - how did u handle WebSphere?

thanks
ohad
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