openstack
/
heat
Code Issues Proposed changes

Give client plugins the chance to not register 

This change improves the client plugin registration process by giving
each plugin a is_available() class method that can prevent the plugin's
registration when there are missing dependencies.

Change-Id: Ief965d033f02f795d5be9beccae5e4b0b96d10b1
Closes-Bug: #1462555
This commit is contained in:
Miguel Grinberg 2015-06-05 17:19:04 -07:00
parent dc32f99a68
commit d3fee2141c
1 changed files with 11 additions and 2 deletions
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13
heat/engine/clients/__init__.py
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@ -15,7 +15,7 @@ from oslo_config import cfg
from oslo_log import log as logging
from oslo_utils import importutils
import six
from stevedore import extension
from stevedore import enabled
from heat.common import exception
from heat.common.i18n import _LE
@ -111,8 +111,17 @@ def initialise():
if _mgr:
return
_mgr = extension.ExtensionManager(
def client_is_available(client_plugin):
if not hasattr(client_plugin.plugin, 'is_available'):
# if the client does not have a is_available() class method, then
# we assume it wants to be always available
return True
# let the client plugin decide if it wants to register or not
return client_plugin.plugin.is_available()
_mgr = enabled.EnabledExtensionManager(
namespace='heat.clients',
check_func=client_is_available,
invoke_on_load=False)