JMX Programming

Hi,
I am looking into JMX as a technology option for a project I am starting. The project is going to be a web-based admin console that will manage J2EE application components (confuration settings, state variables). JMX definitely looks like the right technology for instrumenting java classes for management... however, I need to build a custom Web-based GUI and the HTTP adaptors that are included with JMX implementations are lacking.
Has anyone built a custom Web-based JMX admin console? Are there options other than the HTTP adaptor or is there a way to customize the HTTP adaptor?
Thanks in adavance!

If nobody here has done it, I believe the folks at JBoss have...

Similar Messages

JMSML - XML Based Mark-Up Language for BEA WebLogic JMS and JMX

          JMSML is a Mark-Up language designed and developed to make Java Messaging Service
          (JMS) and Java Management Extensions (JMX) programming easy by hiding all the
          JMS and JMX Java API complexity behind a few, simple, easy to use XML tags.
          Both the White Paper and the binary download are available in dev2dev.beasys.com
          at the link below:
          http://dev2dev.beasys.com/resourcelibrary/whitepapers.jsp?highlight=whitepapers
          Regards
          [email protected]


Hi,
I finally managed to post a message to ActiveMQ 5.4.2 from WLS 10.3. I created a foreign JMS Server in WLS. I am not sure if you still have this issue, but I was facing this problem and managed to resolve it so posting the reply!
I placed the activemq-all-5.4.2.jar file in WLS server classpath.
The settings I used for the Foreign Server are:
General tab
JNDI Initial Context Factory: org.apache.activemq.jndi.ActiveMQInitialContextFactory
JNDI Connection URL: tcp://localhost:61616
Destinations Tab
Name: TestQueue
Local JNDI Name: TestQueue
Remote JNDI Name: dynamicQueues/TestQueue (I tried with a normal queue, but it didn't work. So used dynamicQueues here. Will try with other queue also)
Connection Factories Tab
Name: AMQConnectionFactory (
Local JNDI Name: AMQConnectionFactory
Remote JNDI Name: ConnectionFactory (This is default name given by Active MQ, you can change by adding names in jndi.properties file and placing it in config folder of ActiveMQ installation. Please check here: http://activemq.apache.org/jndi-support.html)
Using this configuration I was able to post message to ActiveMQ queue from Oracle Service Bus. One more issue to be taken care is that if the message type is not "Text" then the message body was coming as blank in ActiveMQ. So set the message type as "Text" explicitly.

Error getting attribute on MBean

After deploying EJB jar file I modified an EJB to add a CMP field. I deployed
it again and tested it. It works fine. However, when I deployed I am getting
a bunch of error. The stack trace is pasted here. Any ideas on resolving this.
I am using WL 6.1 with service pack 3 on Solaris.
Thanks, GP
Here is the partial stack trace:-
<Management> <tspwwi1> <esmirror> <ExecuteThread: '1' for queue: '__weblogic_admin_html_queue'>
<system> <> <140001> <Error getting attribute on MBean esmirrordomain:Application=Catalog,EJBComponent=Catalog,EJBDescriptor=EJBDescriptor-6,EntityDescriptor=EntityDescriptor-11,Location=esmirror,Name=Pool-13,Type=Pool,WeblogicEJBJar=WeblogicEJBJar-13,WeblogicEnterpriseBean=WeblogicEnterpriseBean-13.
Method: null>
javax.management.AttributeNotFoundException:

Hi all,
I m facing similar with problem WLS 9.2, when I try to get value of any attributes for "EJBTransactionRuntime" AttributeNotFoundException ..can any one tell me exact hierarchy for accesing "EJBTransactionRuntime"..here is how my jmx program is accesing through below hierarchy.
ServerRuntime->ApplicationRuntimes->ComponentRuntimes->EJBComponentRuntimes->EJBRuntimes->EntityEJBRuntimes->TransactionRuntimes->EJBTransactionRuntimes
And I m getting following....Exception
" in thread "main" javax.management.AttributeNotFoundException: com.bea:ServerRuntime=examplesServer,Name=BeanMa
nagedAccountEJB,ApplicationRuntime=ejb20BeanMgedEar,Type=EntityEJBRuntime,EJBComponentRuntime=ejb20BeanMgedEjb:Transacti
onRuntimes"
This exception i m getting exactly when my program tries to access "TransactionRuntimes" from hierarchy..
any help g8ly appreciated...

Clientgen Exception - java.lang.VerifyError:Cannot inherit from final class

When i create a client jar from webservice ear the ant taks fails with compiler errors, such as:
CreateProxy:
[clientgen] Generating client jar for earname.ear(WebServiceName_WS) ...
BUILD FAILED
java.lang.VerifyError: Cannot inherit from final class
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:539)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:480)
at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:182)
at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
at weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClassLoader.java:224)
at weblogic.webservice.server.WebServiceFactory.loadNonArrayClass(WebServiceFactory.java:1318)
at weblogic.webservice.server.WebServiceFactory.loadClass(WebServiceFactory.java:1293)
at weblogic.webservice.server.WebServiceFactory.initTypeMaps(WebServiceFactory.java:384)
at weblogic.webservice.server.WebServiceFactory.createFromMBean(WebServiceFactory.java:184)
at weblogic.webservice.tools.build.internal.WSDLGenImpl.getWebServiceRuntime(WSDLGenImpl.java:240)
at weblogic.webservice.tools.build.internal.WSDLGenImpl.run(WSDLGenImpl.java:135)
at weblogic.webservice.tools.build.internal.ClientGenImpl.doClientGenFromEAR(ClientGenImpl.java:438)
at weblogic.webservice.tools.build.internal.ClientGenImpl.run(ClientGenImpl.java:345)
at weblogic.ant.taskdefs.webservices.clientgen.ClientGenTask.doClientGen(ClientGenTask.java:351)
at weblogic.ant.taskdefs.webservices.clientgen.ClientGenTask.execute(ClientGenTask.java:208)
at org.apache.tools.ant.Task.perform(Task.java:341)
at org.apache.tools.ant.Target.execute(Target.java:309)
at org.apache.tools.ant.Target.performTasks(Target.java:336)
at org.apache.tools.ant.Project.executeTarget(Project.java:1339)
at org.apache.tools.ant.Project.executeTargets(Project.java:1255)
at org.apache.tools.ant.Main.runBuild(Main.java:609)
at org.apache.tools.ant.Main.start(Main.java:196)
at org.apache.tools.ant.Main.main(Main.java:235)
Total time: 25 seconds
This is a ant command:
<clientgen ear="${build}/earname.ear" onlyConvenienceMethod="true" warName="webservice.war" serviceName="WebServiceName_WS" packageName="my.package.webservices.generated" autotype="true" clientJar="${build.dist}/client/WebServiceName_WS.jar" overwrite="false" useServerTypes="true" keepGenerated="false" generateAsyncMethods="false" saveWsdl="true" j2me="false" useLowerCaseMethodNames="true" typePackageName="my.package.webservices.generated" usePortNameAsMethodName="false" />
My webservice do not include any final class.
I'm using WebLogic 8.1 SP4.Is there a solution for above problem?
Thanks.
Regards.

Hi all,
I m also facing quite similar problem.
I have one sample JMX program, which i want to collect data from weblogic 9.2.
but when i compile sample program on jdk 1.4 and run it on JDK 1.4 it throws following exception
java.lang.VerifyError: class weblogic.utils.classloaders.GenericCl
assLoader overrides final method .
ERROR 02/13 09:54:03 Stderr 700100 at java.lang.ClassLoader.defineClass0(Native Method)
ERROR 02/13 09:54:03 Stderr 700100 at java.lang.ClassLoader.defineClass(Unknown Source)
ERROR 02/13 09:54:03 Stderr 700100 at java.security.SecureClassLoader.defineClass(Unknown Source)
ERROR 02/13 09:54:03 Stderr 700100 at java.net.URLClassLoader.defineClass(Unknown Source)
ERROR 02/13 09:54:03 Stderr 700100 at java.net.URLClassLoader.access$100(Unknown Source)
ERROR 02/13 09:54:03 Stderr 700100 at java.net.URLClassLoader$1.run(Unknown Source)
ERROR 02/13 09:54:03 Stderr 700100 at java.security.AccessController.doPrivileged(Native Method)
ERROR 02/13 09:54:03 Stderr 700100 at java.net.URLClassLoader.findClass(Unknown Source)
ERROR 02/13 09:54:03 Stderr 700100 at java.lang.ClassLoader.loadClass(Unknown Source)
ERROR 02/13 09:54:03 Stderr 700100 at java.lang.ClassLoader.loadClass(Unknown Source)
but sample program works fine if i run it on JDK 1.5..
can someone tell me...wats reason?
Thanks
Nihil

Error getting attribute on MBean: AttributeNotFoundException

Folks,
our application on WL 6.1 SP 2 runs smooth, no probs during
testing.
But when we try to modify or view the deployment descriptor
using the console, we get the exception which the stack trace
below. We get this with every ejb-jar file.
please help ....
cu
indy
<Feb 25, 2002 10:43:10 AM GMT+00:00> <Error> <Management> <Error getting attribute
on MBean xxxxx.xxx:Application=****,EJBComponent=****,
EJBDescriptor=EJBDescriptor-2,Location=CentralServer,Name=Pool-7,StatelessSessionDescriptor=StatelessSessionDescriptor-7,
Type=Pool,WeblogicEJBJar=WeblogicEJBJar-5,WeblogicEnterpriseBean=WeblogicEnterpriseBean-7.
Method: null
javax.management.AttributeNotFoundException:
at weblogic.management.internal.DynamicMBeanImpl.getXAttributeInfo(DynamicMBeanImpl.java:1630)
at weblogic.management.internal.DynamicMBeanImpl.getAttribute(DynamicMBeanImpl.java:502)
at weblogic.management.internal.DynamicMBeanImpl.getAttribute(DynamicMBeanImpl.java:477)
at com.sun.management.jmx.MBeanServerImpl.getAttribute(MBeanServerImpl.java:1181)
at com.sun.management.jmx.MBeanServerImpl.getAttribute(MBeanServerImpl.java:1151)
at weblogic.management.internal.MBeanProxy.getOneAttribute(MBeanProxy.java:283)
at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:199)
at $Proxy92.getAttribute(Unknown Source)
at weblogic.management.console.utils.MBeans.getDisplayName(MBeans.java:785)
at weblogic.management.console.utils.MBeans.getDisplayName(MBeans.java:662)
at weblogic.management.console.tags.NavDeleteMenuTag.doStartTag(NavDeleteMenuTag.java:53)
at weblogic.management.console.webapp._ejb._weblogic.__nav._jspService(__nav.java:1743)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
at weblogic.servlet.internal.RequestDispatcherImpl.include(RequestDispatcherImpl.java:466)
at weblogic.servlet.internal.RequestDispatcherImpl.include(RequestDispatcherImpl.java:296)
at weblogic.servlet.jsp.PageContextImpl.include(PageContextImpl.java:116)
at weblogic.management.console.webapp._ejb.__nav._jspService(__nav.java:181)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
at weblogic.servlet.internal.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:241)
at weblogic.servlet.jsp.PageContextImpl.forward(PageContextImpl.java:112)
at weblogic.management.console.actions.ForwardAction.perform(ForwardAction.java:35)
at weblogic.management.console.actions.internal.ActionServlet.doAction(ActionServlet.java:171)
at weblogic.management.console.actions.internal.ActionServlet.doGet(ActionServlet.java:91)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2495)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2204)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)

Hi all,
I m facing similar with problem WLS 9.2, when I try to get value of any attributes for "EJBTransactionRuntime" AttributeNotFoundException ..can any one tell me exact hierarchy for accesing "EJBTransactionRuntime"..here is how my jmx program is accesing through below hierarchy.
ServerRuntime->ApplicationRuntimes->ComponentRuntimes->EJBComponentRuntimes->EJBRuntimes->EntityEJBRuntimes->TransactionRuntimes->EJBTransactionRuntimes
And I m getting following....Exception
" in thread "main" javax.management.AttributeNotFoundException: com.bea:ServerRuntime=examplesServer,Name=BeanMa
nagedAccountEJB,ApplicationRuntime=ejb20BeanMgedEar,Type=EntityEJBRuntime,EJBComponentRuntime=ejb20BeanMgedEjb:Transacti
onRuntimes"
This exception i m getting exactly when my program tries to access "TransactionRuntimes" from hierarchy..
any help g8ly appreciated...

Monitoring and gathering runtime statistics

Hi,
I would like to be able to gather runtime statistics of a WL5.10 server and
keep all the data for analysis at a later time.
Basically, I'd like to log any of the information that's available from the
console to a file. (This is for tuning purposes...)
Gathering heap information is easy enough but how do I gather data on:
- Connected users
- Connection pool stats
- EJB (cache/pool usage)
- Execute queue length
- Execute queue throughput
Thanks!
Frederic

hi,
JMX programs can do .. or u can use weblogic.admin for settign JMX stuff
"Steve Feldman" <[email protected]> wrote:
>
I've got an ISAPI bridge connecting to a (6) node cluster. I've been
running into
some issues with my administrative node, so in order to determine all
of my other
nodes are actually up and running, I ran the "?__WebLogicBridgeConfig"
command.
I saw some interesting statistics that I am very unaware of. Does anyone
have
any insight into these...
Build date/time: May 3 2001 15:44:35
Runtime statistics:
requests: 813
successful requests: 812
Exception objects created: 537
Exception Objects deleted: 537
URL Objects created: 652
URL Objects deleted: 644
connections recycled: 544
UNKNOWN_ERROR_CODE exceptions: 0
CONNECTION_REFUSED exceptions: 309
CONNECTION_TIMEOUT exceptions: 0
READ_ERROR exceptions: 0
WRITE_ERROR exceptions: 0
READ_TIMEOUT exceptions: 1
WRITE_TIMEOUT exceptions: 0
UNKNOWN_HOST exceptions: 0
NO_RESOURCES exceptions: 0
PROTOCOL_ERROR exceptions: 227
CONFIG_ERROR exceptions: 0
FAILOVER_REQUIRED exceptions: 0
Regards,
Steve
PS: Does anyone know of any other commands that can be done from a browser
to
do some monitoring (beyond the console)...

ISAPI and WebLogicBridgeConfig Runtime statistics

I've got an ISAPI bridge connecting to a (6) node cluster. I've been running into
some issues with my administrative node, so in order to determine all of my other
nodes are actually up and running, I ran the "?__WebLogicBridgeConfig" command.
I saw some interesting statistics that I am very unaware of. Does anyone have
any insight into these...
Build date/time: May 3 2001 15:44:35
Runtime statistics:
requests: 813
successful requests: 812
Exception objects created: 537
Exception Objects deleted: 537
URL Objects created: 652
URL Objects deleted: 644
connections recycled: 544
UNKNOWN_ERROR_CODE exceptions: 0
CONNECTION_REFUSED exceptions: 309
CONNECTION_TIMEOUT exceptions: 0
READ_ERROR exceptions: 0
WRITE_ERROR exceptions: 0
READ_TIMEOUT exceptions: 1
WRITE_TIMEOUT exceptions: 0
UNKNOWN_HOST exceptions: 0
NO_RESOURCES exceptions: 0
PROTOCOL_ERROR exceptions: 227
CONFIG_ERROR exceptions: 0
FAILOVER_REQUIRED exceptions: 0
Regards,
Steve
PS: Does anyone know of any other commands that can be done from a browser to
do some monitoring (beyond the console)...

hi,
JMX programs can do .. or u can use weblogic.admin for settign JMX stuff
"Steve Feldman" <[email protected]> wrote:
>
I've got an ISAPI bridge connecting to a (6) node cluster. I've been
running into
some issues with my administrative node, so in order to determine all
of my other
nodes are actually up and running, I ran the "?__WebLogicBridgeConfig"
command.
I saw some interesting statistics that I am very unaware of. Does anyone
have
any insight into these...
Build date/time: May 3 2001 15:44:35
Runtime statistics:
requests: 813
successful requests: 812
Exception objects created: 537
Exception Objects deleted: 537
URL Objects created: 652
URL Objects deleted: 644
connections recycled: 544
UNKNOWN_ERROR_CODE exceptions: 0
CONNECTION_REFUSED exceptions: 309
CONNECTION_TIMEOUT exceptions: 0
READ_ERROR exceptions: 0
WRITE_ERROR exceptions: 0
READ_TIMEOUT exceptions: 1
WRITE_TIMEOUT exceptions: 0
UNKNOWN_HOST exceptions: 0
NO_RESOURCES exceptions: 0
PROTOCOL_ERROR exceptions: 227
CONFIG_ERROR exceptions: 0
FAILOVER_REQUIRED exceptions: 0
Regards,
Steve
PS: Does anyone know of any other commands that can be done from a browser
to
do some monitoring (beyond the console)...

Deal Alert

Fry's Electronics has a decent offer I spotted this morning for those of you building a new CS5 editing rig...
Motherboard Combo:
Gigabyte GA-X58A-UD3R
Intel Core i7 930
Fry's price after $20 rebate $364.99
Newegg.com's price, over $500 when you include shipping.
My budget home computer has a similar but different Gigabyte motherboard model, the EX58 UD3R rev. 1. It only has 4 Ram slots. This model motherboard on sale at Fry's is an X58 with 6 Ram slots capable of 12GB of Ram, or if your budget allows expensive 4GB modules; 24GB.
Here are the motherboard specs from the gigabyte.com website:
SPECS

Hi Todd,
Please see this link
http://docs.oracle.com/cd/E21764_01/apirefs.1111/e15033/com/bea/wli/sb/management/configuration/SessionManagementMBean.html
The key is to get the reference to Session and then pretty much every thing you can access using the Java API. Although the API's are available; there is no description provided. This will give you tough time to understand ;))))
Everything in OSB can be access via JMX Programming and the Java API references for OSB. Please see the relevant Interfaces Documentation to get idea on how to use the API in details. I will try to create the OSB flow which will simulate your error handling flow.
Will keep posted.
Regards
Sushil Deshpande
sushil.deshpande<at>techdemocracy.com
Edited by: Sushil Deshpande on Apr 9, 2012 11:47 AM

MBean Server as a session bean?

Hi folks,
I´m new to JMX programming and I would like someone to answer what is the best practice for deploying the MBean Server:
as a standalone java application (JSE) or can it be contained in an application server as a session bean?
Thank you.

It depends on your environment. E.g. we are developing server applications, and each process is exposing monitoring/configuration data through an embedded MBean Server.

Programming Weblogic with jmx without using weblogic api?

Hi,
I want to know if it is possible to program weblogic management service without
using weblogic api but just rely on standard JMX interface and methods.
Currently, I am relying on weblogic api weblogic.jndi.Environment and weblogic.management.MBeanHome
interface to get the context and access the MBean Server subsystem. Can I find
the equivalent using jmx?
My code is as follows:
Environment env = new Environment();
env.setProviderUrl(url);
env.setSecurityPrincipal(username);
env.setSecurityCredentials(password);
Context ctx = env.getInitialContext();
MBeanHome home = (MBeanHome) ctx.lookup(MBeanHome.ADMIN_JNDI_NAME);
String domain = home.getDomainName();
homeServer = home.getMBeanServer();
Thank you.

Hi Ryan,
I have looked through the documentation.
It told me that I need to use weblogic.management.MBeanHome interface to get MBeanHome
and from there then I can only use jmx interface.
I presume it is not possible not to use weblogic.jar if I want to establish the
initial connection with Weblogic server?
Thanks.
ryan upton <[email protected]> wrote:
YongLeong wrote:
Hi,
I want to know if it is possible to program weblogic management servicewithout
using weblogic api but just rely on standard JMX interface and methods.
Currently, I am relying on weblogic api weblogic.jndi.Environment andweblogic.management.MBeanHome
interface to get the context and access the MBean Server subsystem.Can I find
the equivalent using jmx?
My code is as follows:
Environment env = new Environment();
env.setProviderUrl(url);
env.setSecurityPrincipal(username);
env.setSecurityCredentials(password);
Context ctx = env.getInitialContext();
MBeanHome home = (MBeanHome) ctx.lookup(MBeanHome.ADMIN_JNDI_NAME);
String domain = home.getDomainName();
homeServer = home.getMBeanServer();
Thank you.I think you'll find your answer here:
http://edocs.bea.com/wls/docs81/jmx/index.html
HTH
~Ryan

How to run a java program in the JVM of an already running program?

As far as I know about JVM, each time we run a program a separate instance of JVM is created where the program runs. Correct me if I am wrong.
Is there any way for another program to execute itself in the same JVM?
Currently I am working on JFCUnit which is a tool used to automate swing applications. I am trying to automate JConsole.
If I open "JConsole.exe" through a program and then try to get the handles using JFCUnit, things are not working.
If I use JConsole.jar in JDK/lib and create a new instance of JConsole and then try to get the handles using JFCUnit, I am able to proceed with automation.
But here comes the problem :-
The application which needs to be automated through JConsole requires it to be started with few arguments, which is as follows:
%JDK_HOME%\bin\jconsole -J-Djava.class.path=%CLASSPATH% -J-Dcom.sun.management.jmxremote.ssl=false -J-Dcom.sun.management.jmxremote.authenticate=true -J-Djmx.remote.protocol.provider.pkgs=oracle.oc4j.admin.jmx.remote "service:jmx:rmi://localhost:23791"So this problem can be solved in two ways,
Either
1. JFCunit could be made to recognize the JConsole.exe which would be running is a different JVM.
OR
2. JConsole.jar to be used in a way so that it takes the required arguments, hereby an instance of JConsole would be created that too in the same JVM as that of the program.
I am more interested in the first solution as it would definitely be helpful in other projects as well.
Please let me know if any other solution is possible.
Any kinda solution is appreciated :)
Thanks in advance.

Give a look at Terracota.
http://www.terracottatech.com/

Using JMX and MBeans

I've been experimenting with Java instrumentation with MBeans.
I created a small app to try out some of the JMX features. The app has a class that I would like to monitor with MBeans. So I created to interfaces to function as MBeans and then had the class in my app implement both interfaces.
I then wrote a class with only a main() method to instantiate my class and call the methods it implemented from my MBean interface. In the main method I provided the code to get an MBeanServer object and then use that to register my class that implemented the MBean interfaces. My intention was to try this out, but before I did I commented out the code needed to register the class with the MBean server. I did this because I assumed the implemented interface methods would be available for monitoring without registering and it made me think if I can monitor the instrumented class like this why would I need the MBean server.
So what is the purpose of the JMX framework and MBeans if I can instrument any class as described above?
Is it necessary to register only to be able to monitor from outside the JMV where the instrumented class is running?
Or are there other advantages\features\reasons for registering with the MBean server?
Thanks

"MS" <[email protected]> wrote:
>
Hello All,
I am looking for a java program that can create JDBC connection pool
and datasource
using JMX/Mbeans of WLS 7.0.2.
Can somebody help?
Thanks in advance.
rgds
MS

Trouble Registering Custom MBean in WLS 6.1 (Example from JMX Guide)

Hi there,
I have trouble getting an example to work provided in the BEA Manual
"Programming WebLogic JMX Services". The example of registering a
custom MBeans produces in my case:
java -cp .;C:\bea\wlserver6.1\lib\weblogic.jar jmx.dummy.MyClient
Getting BEA MBean Server
Using domain: weblogic
Create object name
Create MBean Dummy within MBean Server
Could not create MBean Dummy
java.rmi.UnmarshalException: error unmarshalling arguments; nested
exception is:
java.lang.ClassNotFoundException: jmx.dummy.MyClient
java.lang.ClassNotFoundException: jmx.dummy.MyClient
<<no stack trace available>>
--------------- nested within: ------------------
weblogic.rmi.extensions.RemoteRuntimeException - with nested
exception:
[java.rmi.UnmarshalException: error unmarshalling arguments; nested
exception is:
        java.lang.ClassNotFoundException: jmx.dummy.MyClient]
at weblogic.rmi.internal.ProxyStub.invoke(ProxyStub.java:60)
at $Proxy2.registerMBean(Unknown Source)
at jmx.dummy.MyClient.registerMBean(MyClient.java:57)
at jmx.dummy.MyClient.main(MyClient.java:19)
I have a custom MBean: MyCustomMBean:
package jmx.dummy;
public interface MyCustomMBean
public int      getAttribute();
and it's implementation class MyClient listed below. Does anybody know
what I'm doing wrong ?
Greetings,
Alex
package jmx.dummy;
import weblogic.management.MBeanHome;
import weblogic.management.Helper;
import weblogic.management.RemoteMBeanServer;
import javax.management.*;
public class MyClient implements MyCustomMBean, java.io.Serializable
MBeanServer server = null;
ObjectName mbo = null;
String mbeanName = null;
public static void main(String[] args)
MyClient client = new MyClient();
client.createMBeanServer();
client.registerMBean();
client.getMBeanInfo();
private void createMBeanServer()
MBeanHome mbh =
Helper.getMBeanHome("system","beabeabea","t3://localhost:7001","petstoreServer");
echo("Getting BEA MBean Server");
server = mbh.getMBeanServer();
if (server == null)
echo("Server is null");
System.exit(2);
private void registerMBean()
String domain = server.getDefaultDomain();
echo("Using domain: " + domain);
mbeanName = new String("Dummy");
try
echo("Create object name");
mbo = new ObjectName(domain + ":type="+mbeanName);
catch (MalformedObjectNameException e1)
echo("MalformedObjectNameException");
e1.printStackTrace();
System.exit(1);
echo("Create MBean " + mbeanName + " within MBean Server");
try
//server.createMBean(mbeanName,mbo);
server.registerMBean((Object) new MyClient(), mbo);
catch (Exception e)
echo("Could not create MBean " + mbeanName);
e.printStackTrace();
System.exit(1);
private void getMBeanInfo()
echo("getting management information for "+mbeanName);
MBeanInfo info = null;
try
info = server.getMBeanInfo(mbo);
catch (Exception e)
echo("could not get MBeanInfo object for "+mbeanName);
e.printStackTrace();
return;
echo("CLASSNAME: \t"+info.getClassName());
echo("DESCRIPTION: \t"+info.getDescription());
echo("ATTRIBUTES: todo ....");
echo("\n\n");
try
echo("Get MBean Values:");
String state = (String)
server.getAttribute(mbo,"MyAttribute");
catch (Exception e)
echo("Could not read attributes");
e.printStackTrace();
return;
echo("End of DEMO");
private void echo(String error)
System.out.println(error);
public int getAttribute()
return 3434;

Hi, i'm using wl 6.0 on HPunix.
And.. we don't have any serverclasses folder. :(
Audun
[email protected] (Alex) wrote:
OK, I got it working. Will answer it here in case somebody else has a
problem. Editing the CLASSPATH of WLS did not work for me but putting
my classes in ./config/serverclasses/ did the trick. But then I
encountered another problem, new exception that my code was not JMX
compliant. Seperating the MBean implementation for the MyClient class
to a new class worked:
new class MyCustom:
package jmx.dummy;
public class MyCustom implements
jmx.dummy.MyCustomMBean,java.io.Serializable
public int getMyAttribute()
return 3434;
untouched MyCustomMBean class:
package jmx.dummy;
public interface MyCustomMBean
public int      getMyAttribute();
edited MyClient class:
package jmx.dummy;
import weblogic.management.MBeanHome;
import weblogic.management.Helper;
import weblogic.management.RemoteMBeanServer;
import javax.management.*;
public class MyClient
MBeanServer server = null;
ObjectName mbo = null;
String mbeanName = null;
public static void main(String[] args)
MyClient client = new MyClient();
client.createMBeanServer();
client.registerMBean();
client.getMBeanInfo();
     client.unregister();
private void createMBeanServer()
MBeanHome mbh =
Helper.getMBeanHome("system","beabeabea","t3://localhost:7001","examplesServer");
echo("Getting BEA MBean Server");
server = mbh.getMBeanServer();
if (server == null)
echo("Server is null");
System.exit(2);
private void registerMBean()
String domain = server.getDefaultDomain();
echo("Using domain: " + domain);
mbeanName = new String("MyCustomMBean");
try
echo("Create object name");
mbo = new ObjectName(domain + ":type="+mbeanName);
catch (MalformedObjectNameException e1)
echo("MalformedObjectNameException");
e1.printStackTrace();
System.exit(1);
echo("Create MBean " + mbeanName + " within MBean Server");
try
//server.createMBean(mbeanName,mbo);
server.registerMBean((Object) new MyCustom(), mbo);
catch (Exception e)
echo("Could not create MBean " + mbeanName);
e.printStackTrace();
System.exit(1);
private void getMBeanInfo()
echo("getting management information for "+mbeanName);
MBeanInfo info = null;
try
info = server.getMBeanInfo(mbo);
catch (Exception e)
echo("could not get MBeanInfo object for "+mbeanName);
e.printStackTrace();
return;
echo("CLASSNAME: \t"+info.getClassName());
echo("DESCRIPTION: \t"+info.getDescription());
echo("ATTRIBUTES: todo ....");
echo("\n\n");
try
echo("Get MBean Values:");
String state =
(server.getAttribute(mbo,"MyAttribute")).toString();
System.out.println("state is "+state);
catch (Exception e)
echo("Could not read attributes");
e.printStackTrace();
return;
echo("End of DEMO");
private void echo(String error)
System.out.println(error);
public int getAttribute()
return 3434;
private void unregister()
try
server.unregisterMBean(mbo);
catch (Exception e)
echo("could not unregister mbean");
[email protected] (Alex) wrote in message news:<[email protected]>...
Hi there,
I have trouble getting an example to work provided in the BEA Manual
"Programming WebLogic JMX Services". The example of registering a
custom MBeans produces in my case:
java -cp .;C:\bea\wlserver6.1\lib\weblogic.jar jmx.dummy.MyClient
Getting BEA MBean Server
Using domain: weblogic
Create object name
Create MBean Dummy within MBean Server
Could not create MBean Dummy
java.rmi.UnmarshalException: error unmarshalling arguments; nested
exception is:
java.lang.ClassNotFoundException: jmx.dummy.MyClient
java.lang.ClassNotFoundException: jmx.dummy.MyClient
<<no stack trace available>>
--------------- nested within: ------------------
weblogic.rmi.extensions.RemoteRuntimeException - with nested
exception:
[java.rmi.UnmarshalException: error unmarshalling arguments; nested
exception is:
java.lang.ClassNotFoundException: jmx.dummy.MyClient]
at weblogic.rmi.internal.ProxyStub.invoke(ProxyStub.java:60)
at $Proxy2.registerMBean(Unknown Source)
at jmx.dummy.MyClient.registerMBean(MyClient.java:57)
at jmx.dummy.MyClient.main(MyClient.java:19)
I have a custom MBean: MyCustomMBean:
package jmx.dummy;
public interface MyCustomMBean
public int      getAttribute();
and it's implementation class MyClient listed below. Does anybody know
what I'm doing wrong ?
Greetings,
Alex
package jmx.dummy;
import weblogic.management.MBeanHome;
import weblogic.management.Helper;
import weblogic.management.RemoteMBeanServer;
import javax.management.*;
public class MyClient implements MyCustomMBean, java.io.Serializable
MBeanServer server = null;
ObjectName mbo = null;
String mbeanName = null;
public static void main(String[] args)
MyClient client = new MyClient();
client.createMBeanServer();
client.registerMBean();
client.getMBeanInfo();
private void createMBeanServer()
MBeanHome mbh =
Helper.getMBeanHome("system","beabeabea","t3://localhost:7001","petstoreServer");
echo("Getting BEA MBean Server");
server = mbh.getMBeanServer();
if (server == null)
echo("Server is null");
System.exit(2);
private void registerMBean()
String domain = server.getDefaultDomain();
echo("Using domain: " + domain);
mbeanName = new String("Dummy");
try
echo("Create object name");
mbo = new ObjectName(domain + ":type="+mbeanName);
catch (MalformedObjectNameException e1)
echo("MalformedObjectNameException");
e1.printStackTrace();
System.exit(1);
echo("Create MBean " + mbeanName + " within MBean Server");
try
//server.createMBean(mbeanName,mbo);
server.registerMBean((Object) new MyClient(), mbo);
catch (Exception e)
echo("Could not create MBean " + mbeanName);
e.printStackTrace();
System.exit(1);
private void getMBeanInfo()
echo("getting management information for "+mbeanName);
MBeanInfo info = null;
try
info = server.getMBeanInfo(mbo);
catch (Exception e)
echo("could not get MBeanInfo object for "+mbeanName);
e.printStackTrace();
return;
echo("CLASSNAME: \t"+info.getClassName());
echo("DESCRIPTION: \t"+info.getDescription());
echo("ATTRIBUTES: todo ....");
echo("\n\n");
try
echo("Get MBean Values:");
String state = (String)
server.getAttribute(mbo,"MyAttribute");
catch (Exception e)
echo("Could not read attributes");
e.printStackTrace();
return;
echo("End of DEMO");
private void echo(String error)
System.out.println(error);
public int getAttribute()
return 3434;

JMX version 1.0 & 1.2 conflict.

I have a JMX client program running in JDK1.5 and the JMX server in 1.4 JDK and weblogic8.1.
When I am trying to connect it is throwing the exception :
Exception caught: java.lang.NullPointerException
at weblogic.rjvm.BasicOutboundRequest.sendReceive(BasicOutboundRequest.java:108)
at weblogic.rmi.internal.BasicRemoteRef.invoke(BasicRemoteRef.java:164)
at weblogic.management.internal.RemoteMBeanServerImpl_815_WLStub.queryNames(Unknown Source)
at JMXTEST.main(JMXTEST.java:41)
Caused by: java.lang.NullPointerException
This I understood, because of JMX version conflict 1.0 and 1.2, I tried setting System.setProperty("jmx.serial.form", "1.0") ;, but It didn�t worked.
Problem here is, the classes are present in rt.jar and weblogic.jar, but having different versions of JMX. The program is getting the classes from rt.jar is creating the issue. Is there any way to specify in the program, get these classes from weblogic.jar and not from rt.jar
OR is there any solution to this issue.
Code :
MBeanServer mbs = (RemoteMBeanServer) home.getMBeanServer();
Set mbeans = mbs.queryNames(objName, null);
Your help is greatly appreciated. Thanks in advance.
Regards,
Shyam

Hmm..
If the two JMX versions are incompatible,. then a SerializationException is thrown. I had faced a similar problem working with Websphere 5.x and JMX 1.2.. The only way you can go around this is to use a client that is built on JMX 1.0, or change your server side JMX version. Personally i think you should just use a JMX 1.0 client.
The reason why both are incompatible is that the serviceVersionUIDs that are difined in the JMX 1.0 classes do not match the ones in JMX 1.2. There is not way out of this. :( You see, many JMX Classes such as ObjectName, etc are sent to - from the client and the server so they need to be serialized, deserialzed.
Your NullPointerException may be due to something else. However i suspect that once you resolve NullPointerException, you will eventually bump into serialization / deserialization problems.

MBean sample program given in the URL is not working....

Hi, i am a newbie learning about JMX and mBean and its registration.
I am going through the following URL and downloaded jmx_examples.zip given in that page.
<p>
" http://java.sun.com/docs/books/tutorial/jmx/mbeans/standard.html "
</p>
But, when i run it from my local system, i am getting the following errors,
C:\JMX_samples>javac com\example\*.java
com\example\Client.java:15: cannot find symbol
symbol : class JMX
location: package javax.management
import javax.management.JMX;
^
com\example\QueueSample.java:9: cannot find symbol
symbol : class ConstructorProperties
location: package java.beans
import java.beans.ConstructorProperties;
^
com\example\QueueSample.java:18: cannot find symbol
symbol : class ConstructorProperties
location: class com.example.QueueSample
@ConstructorProperties({"date", "size", "head"})
^
com\example\Client.java:113: cannot find symbol
symbol : variable JMX
location: class com.example.Client
JMX.newMBeanProxy(mbsc, mbeanName, HelloMBean.class, true);
^
com\example\Client.java:167: cannot find symbol
symbol : variable JMX
location: class com.example.Client
JMX.newMXBeanProxy(mbsc, mxbeanName, QueueSamplerMXBean.class);
^
Note: com\example\QueueSampler.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: com\example\Client.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
5 errors
I know that, i have to include some jars, but i dont know what are they? please help me find them and also let me know what are the jars that i need to run this sample program?
Edited by: vinney_143 on Apr 7, 2009 5:31 PM

It looks as if you are trying to use an example for Java 6 with a Java 5 platform. The javax.management.JMX and java.beans.ConstructorProperties classes are new with Java 6.
Regards,
Éamonn McManus -- JMX Spec Lead -- [http://weblogs.java.net/blog/emcmanus]

JMX Programming

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