add method num_queued_traps

Author: jbize

netsnmpagent.py

@@ -929,12 +929,15 @@ def shutdown(self):
 		# one effectively has to rely on the OS to release resources.
 		# libnsa.shutdown_agent()
 
+	def num_queued_traps(self):
+		return len(self.queued_traps)
+
 	def queue_trap(self, *args, **kwargs):
 		'''This method queues a trap to be sent from the main thread loop.
-		In SNMP v5.7.3 (and likely others), many traps sent from threads in agentx
-		sub-agents are duplicated.  This method and send_queued_traps() support
-		queueing traps in non-main threads and actually sending them from the
-		main thread in the "check_and_process loop."
+		In SNMP v5.7.3 (and likely other version), many traps sent from threads 
+		in agentx sub-agents are duplicated.  This method and send_queued_traps() 
+		support queueing traps in non-main threads and actually sending them from 
+		the main thread in the "check_and_process loop."
 		'''
 		with self.trap_lock:
 			self.queued_traps.append((args, kwargs))
@@ -943,6 +946,8 @@ def send_queued_traps(self):
 		'''This method must be called from the main thread loop and dequeues and 
 		send all queued traps.
 		'''
+		if not len(self.queued_traps):
+			return
 		with self.trap_lock:
 			for arg_tuple in self.queued_traps:
 				(args, kwargs) = arg_tuple