code to update mbean attribute value thru programatically.

[rajajboss]

Dear All,

I need to update the mbean attribute values that are present in the jboss through programatically.I googled for this .but no luck.

Can anybody send me the sample code.

Thanks,

Raja

[jaysensharma]

All the MBean attributes can not be written.  However i have quickly written a simple example to demonstrates how you cah change the ROOT loggers logging level to TRACE using MBean code by setting Attribute "level" on MBean "jboss.as:subsystem=logging,root-logger=ROOT"

package client;
import javax.management.*;
import javax.management.remote.*;
import javax.management.Attribute;

public class JMXExample { 
    public static void main(String[] args) throws Exception {
        String host = "localhost";
        int port = 9999; 
        String urlString ="service:jmx:remoting-jmx://" + host + ":" + port;
        System.out.println("\n\n\t****  urlString: "+urlString);;
        JMXServiceURL serviceURL = new JMXServiceURL(urlString);
        JMXConnector jmxConnector = JMXConnectorFactory.connect(serviceURL, null);
        MBeanServerConnection connection = jmxConnector.getMBeanServerConnection();

        ObjectName objectName=new ObjectName("jboss.as:subsystem=logging,root-logger=ROOT");
        String level = (String) connection.getAttribute(objectName,"level");
        System.out.println("\n\tCurrent log level for ROOT logger is : " + level);

        System.out.println("\n\tTrying to set ROOT logger level as TRACE ");
        Attribute levelChange = new Attribute("level", "TRACE");
        connection.setAttribute(objectName,levelChange);
       
        level = (String) connection.getAttribute(objectName,"level");
        System.out.println("\n\tAfter Setting the Logger Level ROOT logger is : " + level);

        jmxConnector.close();
    }
}

Hope this will give some idea

[rajajboss]

Hi,

I am getting the below error when i am executing the above program.

Exception in thread "main" java.net.MalformedURLException: Unsupported protocol: remoting-jmx

  at javax.management.remote.JMXConnectorFactory.newJMXConnector(Unknown Source)

  at javax.management.remote.JMXConnectorFactory.connect(Unknown Source)

  at com.alu.dsa.utils.Client.main(Client.java:14)

[jaysensharma]

The "remoting-jmx" protocol support will be present inside the jboss client jar (Which can be found inside the $JBOSS_HOME/bin/client) so add that jar in your clients classpath before running this code.

[rajajboss]

Hi,

I am able to update the JMX attribute value programatically . But I need to update JMX attribute description also.Is this possible.

[ctomc]

raja reddy wrote:

Hi,

I am able to update the JMX attribute value programatically . But I need to update JMX attribute description also.Is this possible.

what exactly do you have in mind by "description" ?

[rajajboss]

Hi,

what I mean is ---  I want to change the XXX datasource's maxpoolsize  description through programatically.

How to achieve it.

[ctomc]

maxpoolsize value or description as in metadata of attribute?

[rajajboss]

it is maxpoolsize description

[rajajboss]

Hi,

it is maxpoolsize's description not value.

Kindly help

[rajajboss]

Hi ,

When I am updating mbean attribute value of type boolean, am getting the bellow error.please note that it is not java.lang.Boolean.But It is working for java.lang.Boolean type.

Code:

String host = "localhost"; 

         int port = 9999;  

         String urlString ="service:jmx:remoting-jmx://" + host + ":" + port; 

         System.out.println("\n\n\t****  urlString: "+urlString);; 

         JMXServiceURL serviceURL = new JMXServiceURL(urlString); 

         JMXConnector jmxConnector = JMXConnectorFactory.connect(serviceURL, null); 

         MBeanServerConnection connection = jmxConnector.getMBeanServerConnection(); 

          ObjectName objectName = new ObjectName(bname.toString());

        javax.management.Attribute changedAttributeValue = null;

  try {

          if(editedAttribute.getType().equals("java.lang.Boolean")||editedAttribute.getType().equals("boolean"));

        //changedAttributeValue = new javax.management.Attribute(editedAttribute.getName(), new Boolean(editedAttribute.getValue()));

        changedAttributeValue = new javax.management.Attribute(editedAttribute.getName(), Boolean.valueOf(editedAttribute.getValue()));

           connection.setAttribute(objectName,changedAttributeValue);

           System.out.println("attrinute value changed..........................");

  } catch (Exception e) {

  // TODO Auto-generated catch block

  e.printStackTrace();

  } 

   }             }

Error:

java.io.IOException: java.lang.ClassNotFoundException: No classloader available

   at org.jboss.remotingjmx.protocol.v2.ServerProxy$SetAttributeHandler.handle(ServerProxy.java:1111)

   at org.jboss.remotingjmx.protocol.v2.ServerCommon$MessageReciever$1.run(ServerCommon.java:152)

   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)

   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)

   at java.lang.Thread.run(Thread.java:745)

Caused by: java.lang.ClassNotFoundException: No classloader available

   at org.jboss.marshalling.AbstractClassResolver.getClassLoaderChecked(AbstractClassResolver.java:91)

   at org.jboss.marshalling.AbstractClassResolver.loadClass(AbstractClassResolver.java:135)

   at org.jboss.marshalling.AbstractClassResolver.resolveClass(AbstractClassResolver.java:116)

   at org.jboss.marshalling.river.RiverUnmarshaller.doReadClassDescriptor(RiverUnmarshaller.java:947)

   at org.jboss.marshalling.river.RiverUnmarshaller.doReadNewObject(RiverUnmarshaller.java:1259)

   at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:276)

   at org.jboss.marshalling.river.RiverUnmarshaller.doReadObject(RiverUnmarshaller.java:213)

   at org.jboss.marshalling.AbstractObjectInput.readObject(AbstractObjectInput.java:72)

   at org.jboss.remotingjmx.protocol.v2.ServerProxy$SetAttributeHandler.handle(ServerProxy.java:1109)

   ... 4 more