Check context before returning cached value

The key manager caches the value of barbican client to be reused,
saving an extra call to keystone.  The cached value is only
applicable to the current context, so the context must be checked
before returning the cached value.

Change-Id: Ib10909a098fb2cd070129c239b6d3b95edc8fea0
Closes-Bug: #1523646
This commit is contained in:
Dave McCowan 2015-12-07 14:25:24 -05:00
parent ef08af9112
commit 0832a03553
2 changed files with 28 additions and 22 deletions

View File

@ -49,6 +49,7 @@ class BarbicanKeyManager(key_mgr.KeyManager):
self._base_url = CONF.keymgr.encryption_api_url
self._parse_barbican_api_url()
self._barbican_client = None
self._current_context = None
def _parse_barbican_api_url(self):
"""Setup member variables to reference the Barbican URL.
@ -84,7 +85,6 @@ class BarbicanKeyManager(key_mgr.KeyManager):
or project_id is None
"""
if not self._barbican_client:
# Confirm context is provided, if not raise not authorized
if not ctxt:
msg = _("User is not authorized to use key manager.")
@ -96,6 +96,10 @@ class BarbicanKeyManager(key_mgr.KeyManager):
LOG.error(msg)
raise exception.KeyManagerError(msg)
# If same context, return cached barbican client
if self._barbican_client and self._current_context == ctxt:
return self._barbican_client
try:
auth = identity.v3.Token(
auth_url=CONF.keymgr.encryption_auth_url,
@ -105,6 +109,7 @@ class BarbicanKeyManager(key_mgr.KeyManager):
self._barbican_client = barbican_client.Client(
session=sess,
endpoint=self._barbican_endpoint)
self._current_context = ctxt
except Exception:
with excutils.save_and_reraise_exception():
LOG.exception(_LE("Error creating Barbican client."))

View File

@ -78,6 +78,7 @@ class BarbicanKeyManagerTestCase(test_key_mgr.KeyManagerTestCase):
self.create = self.mock_barbican.secrets.create
self.key_mgr._barbican_client = self.mock_barbican
self.key_mgr._current_context = self.ctxt
def _build_mock_symKey(self):
self.mock_symKey = mock.Mock()