how to 'clone' an XMBean

[jj]

I have an XMBean that deploys without problems and runs correctly. I want to use it as a template to create a set of 'cloned' MBeans that differ only in ObjectName. I created an Operation on the XMBean called 'clone' that almost works:

 void clone() {
 ObjectName svc = this.getServiceName();
 try {
 MBeanServer server = this.getServer();
 MBeanInfo info = server.getMBeanInfo(svc);
 XMBean xmb = new XMBean((ModelMBeanInfo) info);
 ObjectName newObjectName = new ObjectName(svc.getDomain(), "name", "clone");
 server.registerMBean(xmb, newObjectName);
 } catch (Exception e) {
 e.printStackTrace();
 }
 }

The registerMBean() call fails, I think since I should pass ModelMBeanInfo to the XMBean constructor, not MBeanInfo. I get no runtime cast exception.

Is this approach viable, and if so, how can I actually get a hold of the ModelMBeanInfo required to create 'xmb'? If not, what is the right way to go about this?

Thanks in advance,
jj

[juha]

Where do you set the resource reference your XMBean is supposed to manage?

[jj]

The following appears to solve this problem. I'd appreciate any comments. Thanks in advance,
jj

// get the ModelMBeanInfo, is there any easier way???
MBeanRegistry registry = (MBeanRegistry) MBeanProxyExt.create(MBeanRegistry.class,
ServerConstants.MBEAN_REGISTRY, server);
MBeanEntry entry = registry.get(this.serviceName);
XMBean myXMBean = (XMBean) entry.getMBean();
ModelMBeanInfo minfo = myXMBean.getModelMBeanInfo();

// create a new instance of the invoking subclass, clone isn't supported
Object newInstance = this.getClass().getConstructor(new Class[] {}).newInstance(new Object[] {});

// create the new XMBean with the newInstance as its resource
XMBean xmb = new XMBean(newInstance, OBJECT_REF);

// clone the ModelMBeanInfo, is this necessary???? It's probably cloned in setModelMBeanInfo below - check
minfo = (ModelMBeanInfo) minfo.clone();

// set the persist name to point to a new file according to 'newName'
minfo.getMBeanDescriptor().setField(ModelMBeanConstants.PERSIST_NAME, newName + ".ser");

// set the management interface
xmb.setModelMBeanInfo(minfo);

// register the new bean with the server
server.registerMBean(xmb, newObjName);