WLST to get some info about a Weblogic JMS/SAF Resource...

Example script of how to get a statistic (in this case the BytesReceivedCount) from a SAF resource (queue/topic)

# Connect to Weblogic server
# NB choose right port if you want to talk to a Managed Server instead of
# the Admin server...
connect('weblogic','weblogic','t3://localhost:7003')
serverRuntime()

# For a JMS resource:
cd('/JMSRuntime/servername.jms/JMSServers/jmsservername/Destinations/JMSModuleName!jmsservername@JMSDestinationName')

# For a SAF resource:
cd('/SAFRuntime/servername.saf/Agents/SAFAgentName/RemoteEndpoints/JMSModule!SAFImportedDestinations!SAFDestinationName')

count = cmo.getBytesReceivedCount()
print 'bytes received = %d' % count

Note the serverRuntime() call which connects you to the runtime tree for the server you're interested in.