Thanks. But it remains kludgey.

To stop a listener is easy:

String result = (String)com.pega.pegarules.priv.management.MBeanManagement.executeMBeanOperation(
  "com.pega.pegarules.management.internal.ListenerManagement", "StopAll", null, null, null);

To restart all the listeners, you need to fetch the XML, iterate through, get the name, which you can pass to StartListener

String AvailableListenersXML = (String)com.pega.pegarules.priv.management.MBeanManagement.executeMBeanOperation(
  "com.pega.pegarules.management.internal.ListenerManagement", "AvailableListeners", null, null, null);
// from the XML returned by AvailableListenersXML, parse out /AvailableListeners/Listener/Name into ListenerNames[]
for (String ListenerName in ListenerNames[]) { 

com.pega.pegarules.priv.management.MBeanManagement.executeMBeanOperation(
  "com.pega.pegarules.management.internal.ListenerManagement", "StartListener", ListenerName, null, null);
}