def _create_resource_instance(self, resource_name, plural_name):
"""Factory function for quota Resource.
This routine returns a resource instance of the appropriate type
according to system configuration.
If QUOTAS.track_quota_usage is True, and there is a model mapping for
the current resource, this function will return an instance of
AccountedResource; otherwise an instance of CountableResource.
"""
if (not cfg.CONF.QUOTAS.track_quota_usage
or resource_name not in self._tracked_resource_mappings):
LOG.info(
"Creating instance of CountableResource for "
"resource:%s", resource_name)
return resource.CountableResource(resource_name,
resource._count_resource,
'quota_%s' % resource_name)
else:
LOG.info("Creating instance of TrackedResource for "
"resource:%s", resource_name)
return resource.TrackedResource(
resource_name, self._tracked_resource_mappings[resource_name],
'quota_%s' % resource_name)
def __init__(self, *args, **kwargs):
super(GBPQuotaBase, self).__init__(*args, **kwargs)
tenant_id = kwargs['tenant_id']
ctx = context.Context(user_id=None, tenant_id=tenant_id)
class_name = self.__class__.__name__
resource = DB_CLASS_TO_RESOURCE_NAMES[class_name]
d = {
resource:
quota_resource.CountableResource(resource, None,
"quota_" + resource)
}
resource_quota = QUOTA_DRIVER.get_tenant_quotas(ctx, d,
tenant_id)[resource]
if resource_quota == -1:
return
count = self._get_collection_count(ctx, self.__class__)
if count >= resource_quota:
raise nexcp.OverQuota(overs=[resource])
