def get(self, url):
"""
Get the next free session in the pool.
@param url: A broker url.
@type url: str
@return: A free session.
@rtype: qpid.messaging.Session
"""
self.__lock()
try:
pool = self.__pool(url)
ssn = self.__pop(pool)
if ssn is None:
broker = Broker(url)
con = broker.connect()
ssn = con.session()
pool[1].append(ssn)
return ssn
finally:
self.__unlock()
