def parse_queue(queue):
if 'capacity' not in queue:
queue['capacity'] = -1
if 'min_arrival' not in queue:
queue['min_arrival'] = None
if 'max_arrival' not in queue:
queue['max_arrival'] = None
instanced_queue = Queue(queue['name'], queue['servers'], queue['capacity'],
queue['min_arrival'], queue['max_arrival'],
queue['min_service'], queue['max_service'])
if 'connections' in queue:
for connection in queue['connections']:
name = connection['name']
probability = connection['probability']
instanced_queue.add_connection(name, probability)
return instanced_queue
