class InstanceDispatcher:
def __init__(self, supervisor, instance: Instance = None):
self._before = {}
if instance:
self._before = instance.to_dict()
self._foreman = supervisor.get_foreman_class()(supervisor)
self._command = Command(HostObjects(supervisor.get_hosts()))
def dispatch(self, instance: Instance):
if instance.get_enabled():
instance_running = self._command.is_running(instance)
just_enabled = self._property_changed('enabled', instance)
if just_enabled or not instance_running:
self._foreman.run(instance)
if not just_enabled and not instance_running:
raise StartedBecauseShouldBeRunning(
"Instance {0} started because not running on {1}".format(instance.get_name(),
instance.get_host()))
else:
self._foreman.stop(instance)
return instance
def _property_changed(self, property_name, instance: Instance):
return self._before.get(property_name) is not getattr(instance, property_name)
class CommandResource(ModelResource):
def __init__(self, supervisor, *args, **kwargs):
super().__init__(supervisor, *args, **kwargs)
self._command = Command(self._objects)
def _model_collection(self):
return HostObjects(self._get_supervisor().get_hosts())
def _get_extend_hosts_command_result(self, command_name, parameters):
result = []
for host in self._objects.get_collection():
result.extend(self._command.get_command_result(command_name, host, parameters))
return result
def __init__(self, supervisor, instance: Instance = None):
self._before = {}
if instance:
self._before = instance.to_dict()
self._foreman = supervisor.get_foreman_class()(supervisor)
self._command = Command(HostObjects(supervisor.get_hosts()))
def __init__(self, supervisor, *args, **kwargs):
super().__init__(supervisor, *args, **kwargs)
self._command = Command(self._objects)
