Listing all EJBs through JMX

[danieldestro]

Hi,

I want to list the name (or the references) for all EJBs deploy in the container instance (jboss4.0.3-sp1) through JMX.

The jmx-console have something similiar, but I tried to achieve only the information I need, reading the code, but it is impossible to get it.
( http://jboss.org/wiki/Wiki.jsp?page=DisplayTheJDNITreeWithTheJMXConsole )

Can someone help me to find any documentation about it ou sample code?

Thanks

[dimitris]

You can navigate the jsr77 tree using a simple jmx query:

*:j2eeType=EjbModule,*

Try JBOSS_HOME/bin/twiddle jsr77 on the latest jboss or look how it is implemented in the source code.

[danieldestro]

Hi dimitris,

I tried to use twiddle according to the examples (http://docs.jboss.org/jbossas/jboss4guide/r1/html/ch2.chapter.html), but I only got error messages, such as:

C:\jboss-4.0.3SP1\bin>twiddle query 'jboss:service=JNDIView'
13:48:38,772 ERROR [Twiddle] Command failure
org.jboss.console.twiddle.command.CommandException: Unused argument: JNDIView'
 at org.jboss.console.twiddle.command.QueryCommand.processArguments(Query
Command.java:104)
 at org.jboss.console.twiddle.command.QueryCommand.execute(QueryCommand.j
ava:119)
 at org.jboss.console.twiddle.Twiddle.main(Twiddle.java:290)

or even

C:\jboss-4.0.3SP1\bin>twiddle query '*:j2eeType=EjbModule,*'
13:50:26,810 ERROR [Twiddle] Command failure
org.jboss.console.twiddle.command.CommandException: Unused argument: EjbModule
 at org.jboss.console.twiddle.command.QueryCommand.processArguments(Query
Command.java:104)
 at org.jboss.console.twiddle.command.QueryCommand.execute(QueryCommand.j
ava:119)
 at org.jboss.console.twiddle.Twiddle.main(Twiddle.java:290)

I am using JBoss-4.0.3-SP1 and Java 5.

[dimitris]

Use double quotes.

twiddle query "*:j2eeType=WebModule,*"

[danieldestro]

Hahahaah... different result. But still not satisfied.

C:\jboss-4.0.3SP1\bin>twiddle query "*:j2eeType=EjbModule,*"
17:08:19,307 ERROR [Twiddle] Command failure
org.jboss.console.twiddle.command.CommandException: No MBean matches for query:
*:j2eeType=EjbModule,*
 at org.jboss.console.twiddle.command.MBeanServerCommand.queryMBeans(MBea
nServerCommand.java:60)
 at org.jboss.console.twiddle.command.QueryCommand.execute(QueryCommand.j
ava:126)
 at org.jboss.console.twiddle.Twiddle.main(Twiddle.java:290)

I am reading the source code and I am gonna try it out.

[danieldestro]

Ok, better results now:

C:\jboss-4.0.3SP1\bin>twiddle query "jboss.j2ee:service=EjbModule,*"
jboss.j2ee:service=EjbModule,module=gpa-ejb.jar
jboss.j2ee:service=EjbModule,module=mdc-idf.jar
jboss.j2ee:service=EjbModule,module=mdc.jar

I´ll do some testing with it and try to list the EJBModules´s EJB list.

By the way, EJB (CAPITALS) does not work, the correct is "Ejb"

[peterj]

The listing you got was of all the JAR files containing EJBs. If you want all of the EJBs themselves, try:

twiddle query "*:j2eeType=StatefulSessionBean,*"

and

twiddle query "*:j2eeType=StatelessSessionBean,*"

Usually, it is easiest to use the jmx-console to view the mbeans, and from there decide what to pass to twiddle (or to use in your code when accessing jmx via the api).

[danieldestro]

"PeterJ" wrote:
twiddle query "*:j2eeType=StatefulSessionBean,*"
and
twiddle query "*:j2eeType=StatelessSessionBean,*"

Does not work at all for me with twiddle.

[danieldestro]

Good news!

Ok, this works:

String name = "jboss.management.local:*,j2eeType=StatelessSessionBean";
server = (MBeanServer) MBeanServerLocator.locateJBoss();
Set matches = server.queryMBeans(new ObjectName(name), null);
ServerObjectInstance[] names = (ServerObjectInstance[]) matches.toArray( new ServerObjectInstance[matches.size()] );
for( int i=0; i< names.length; i++ ) {
 out.println(names.getObjectName()+" <br>");
 }

And outputs:

jboss.management.local:name=ejb/MyCoolEjb,J2EEServer=Local,EJBModule=cool.jar,J2EEApplication=null,j2eeType=StatelessSessionBean
jboss.management.local:name=ejb/AnotherCoolEjb,J2EEServer=Local,EJBModule=still-cool.jar,J2EEApplication=null,j2eeType=StatelessSessionBean
jboss.management.local:name=ejb/EjbOrNotEjb,J2EEServer=Local,EJBModule=myapp.jar,J2EEApplication=myapp.ear,j2eeType=StatelessSessionBean

Very close now.

Here I have the JNDI names for lookup. But what I really need is the Bean, and if possible Local and Remote classes/interfaces names.

I know it is possible throgh jmx-console. Just need to get things clear. Any help?

[danieldestro]

I want to see what info I have inside the bean where "j2eeType=EJBModule", link in the link providade at jmx-console

[peterj]

Look at the methods on MBeanServer.

Also google "jboss jmx tutorial".

[danieldestro]

"PeterJ" wrote:
Also google "jboss jmx tutorial".

As if existed any.

[danieldestro]

Finally I achieved what I wanted.

The code bellow shows all the "ejb-jar.xml" deployed in the container.

package test;

import java.lang.reflect.Method;
import java.util.*;
import javax.management.*;
import org.jboss.jmx.adaptor.control.*;
import org.jboss.mx.server.*;
import org.jboss.mx.util.*;

public class Test {
 public void getDeploymentDescriptors() {
 String query = "jboss.management.local:*,j2eeType=EJBModule";
 MBeanServer server = (MBeanServer) MBeanServerLocator.locateJBoss();
 Set matches = server.queryMBeans( new ObjectName( query ), null );
 Iterator it = matches.iterator();
 while( it.hasNext() ) {
 ObjectInstance soi = (ServerObjectInstance) it.next();
 ObjectName objName = soi.getObjectName();

 String objectNameString = objName.toString();
 MBeanInfo mbeanInfo = server.getMBeanInfo(objName);
 MBeanAttributeInfo[] attributeInfo = mbeanInfo.getAttributes();

 for( int a=0; a < attributeInfo.length; a++ ) {
 MBeanAttributeInfo attrInfo = attributeInfo[a];
 if( !"deploymentDescriptor".equals( attrInfo.getName() ) ) {
 continue;
 }
 AttrResultInfo attrResult = Server.getMBeanAttributeResultInfo(objectNameString, attrInfo);
 String attrValue = attrResult.getAsText();

 //prints out the "ejb-jar.xml"
 System.out.println( attrValue );
 }
 }
 }
}