It is possible to create jython script to list active sessions connected to WebSphere Application Server?

Hi denny,

  I suppose that you are talking about HTTP Sessions.
 
  The answer is yes you can do using PMI statics concretelly SessionManager MBean.  With WebModule or Servlet MBeans you can get more granular information

  PMI data organization
  pic.dhe.ibm.com/infocenter/wasinfo/v8r0/...

  Enabling PMI using the wsadmin tool
  pic.dhe.ibm.com/infocenter/wasinfo/v8r0/...
 
   
  an example (care with the indentation):
 
   servers = AdminTask.listServers( '[-serverType APPLICATION_SERVER]').splitlines()
   for server in servers:
    # Get server name
    newserver = server.split('(')
    # get the SessionManager mbean
    sm = AdminControl.queryNames ('WebSphere:type=SessionManager,process=' + newserver[0] + ',*')
    # now get the stats
    AdminControl.getAttribute(sm, 'stats')

   You can use PerfServletApp.ear too
   pic.dhe.ibm.com/infocenter/wasinfo/v8r0/...
   
   Look this thread   
   
   "user" connected to our systems?
   www.websphereusergroup.org/go/thread/vie...

  Hope this helps.
 
regards

Another way without having to write a script, is to use the enbedded Tivoli Performance Viewer.

Not sure what version you are on, but the following is the navigation from the GUI console.

Monitoring and Tuning --> Performance Viewer --> Current Activity --> SELECT YOUR APP SERVER --> Expand Performance Modules --> SELECT Servlet Session Manager and Select View Module. This should should you a LiveCount of HTTP Sessions for all your installed apps. 

If you want to see it for a particular app (in case you have many installed) you can select just the app of interest under the Servlet Session Manager. 

Sorry denny, just noticed your question was specifically around a jython script.

You can save the below to a file called 'checkActiveSessions.py' and call via wsadmin.bat/sh.  Pass in the 'node name' and 'jvm name' as system arguements.
----------------------

#USAGE:  
..."window.parent.tinyMCE.get('post_content').onLoad.dispatch();" contenteditable="true"># if executing from DMGR:  wsadmin.sh/bat -host dmgr_host -port dmgr_SOAP -lang jython -f checkActiveSessions.py nodeName appSrvName
 
#nodeName = 'WASNode01'
#appSrvName = 'server01'

nodeName = sys.argv[0]
appSrvName = sys.argv[1]

perfStr = AdminControl.queryNames("type=Perf,process="+appSrvName+",node="+nodeName+",*")
try:
    perfObj = AdminControl.makeObjectName( perfStr)
    srvrStr = AdminControl.queryNames("type=Server,name="+appSrvName+",node="+nodeName+",*")
    srvrObj = AdminControl.makeObjectName( srvrStr)
    type(perfObj)
    stats = AdminControl.invoke_jmx( perfObj, 'getStatsObject', [ srvrObj, java.lang.Boolean('true')], ['javax.management.ObjectName', 'java.lang.Boolean'])
    print stats.getStats('servletSessionsModule').getStatistic('ActiveCount')
    
except:
    print '==== Server '+appSrvName+' is not running. ===='