openstack
/
neutron-lbaas
Code Issues Proposed changes

Synchronize QuantumManager.get_instance() method 

fixes bug 1155667

Change-Id: Ib6316b332fbd08c5b39e9820e5dc45f1846817cd
This commit is contained in:
Eugene Nikanorov 2013-03-16 17:53:39 +04:00
parent 276fa58092
commit d41a6b1d35
1 changed files with 9 additions and 1 deletions
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10
quantum/manager.py
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@ -20,6 +20,7 @@ from oslo.config import cfg
from quantum.common.exceptions import ClassNotFound
from quantum.openstack.common import importutils
from quantum.openstack.common import lockutils
from quantum.openstack.common import log as logging
from quantum.openstack.common import periodic_task
from quantum.plugins.common import constants
@ -131,9 +132,16 @@ class QuantumManager(object):
"desc": plugin_inst.get_plugin_description()})
@classmethod
def get_instance(cls):
@lockutils.synchronized("qmlock", "qml-")
def _create_instance(cls):
if cls._instance is None:
cls._instance = cls()
@classmethod
def get_instance(cls):
# double checked locking
if cls._instance is None:
cls._create_instance()
return cls._instance
@classmethod