the jmxClient provides access to the system/alfresco global properties by listing them and get a specific system/alfresco global property Only executable in the javascript console because of the print statement.

alfresco jmxClient rootobject example.js

print(jmxClient.listSystemProperties());
print('Java version:'+jmxClient.getSystemProperty('java.version'));

print(jmx.listAlfProperties());
print('Activiti enabled?'+jmx.getAlfProperty('system.workflow.engine.activiti.enabled'));