Example: Identifying running objects using wsadmin scripting
Use the AdminControl object to interact with running MBeans.
In the WebSphere® Application Server, MBeans represent running objects. You can interrogate the MBean server to see the objects it contains.
- Use the queryNames command to see running MBean
objects. For example:
Using Jacl:
$AdminControl queryNames *
Using Jython:
This command returns a list of all MBean types. Depending on the server to which your scripting client attaches, this list can contain MBeans that run on different servers:print AdminControl.queryNames('*')
- If the client attaches to a stand-alone WebSphere Application Server, the list contains MBeans that run on that server.
- If the client attaches to a node agent, the list contains MBeans that run in the node agent and MBeans that run on all application servers on that node.
- If the client attaches to a deployment manager, the list contains MBeans that run in the deployment manager, all of the node agents communicating with that deployment manager, and all application servers on the nodes served by those node agents.
- The list that the queryNames command returns is a string
representation of JMX ObjectName objects. For example:
WebSphere:cell=MyCell,name=TraceService,mbeanIdentifier=TraceService, type=TraceService,node=MyNode,process=server1
This example represents a TraceServer object that runs in server1 on MyNode. - The single queryNames argument represents the ObjectName object
for which you are searching. The asterisk ("*") in the example means
return all objects, but it is possible to be more specific. As shown
in the example, ObjectName has two parts: a domain, and a
list of key properties. For MBeans created by the WebSphere Application
Server, the domain is WebSphere. If you do not specify
a domain when you invoke queryNames, the scripting client assumes
the domain is WebSphere. This means that the first example
query is equivalent to:
Using Jacl:
$AdminControl queryNames WebSphere:*
Using Jython:
AdminControl.queryNames('WebSphere:*')
- WebSphere Application Server includes the
following key properties for the ObjectName object:
- name
- type
- cell
- node
- process
- mbeanIdentifier
Using Jacl:
$AdminControl queryNames WebSphere:type=Server,node=myNode,*
Using Jython:
This example returns a list of all MBeans that represent server objects running the node myNode. The, * at the end of the ObjectName object is a JMX wildcard designation. For example, if you enter the following:AdminControl.queryNames('WebSphere:type=Server,node=myNode,*')
Using Jacl:
$AdminControl queryNames WebSphere:type=Server,node=myNode
Using Jython:
you get an empty list back because the argument to queryNames is not a wildcard. There is no Server MBean running that has exactly these key properties and no others.print AdminControl.queryNames('WebSphere:type=Server,node=myNode')
- If you want to see all the MBeans representing applications running
on a particular node, invoke the following example:
Using Jacl:
$AdminControl queryNames WebSphere:type=Application,node=myNode,*
Using Jython:
print AdminControl.queryNames('WebSphere:type=Application,node=myNode,*')