def fetch_enabled(self):
enabled = self._enabled
if not callable(enabled):
return defer.succeed(bool(enabled))
# By default the key is the action name
maker = IContextMaker(self.model)
context = maker.make_context(key=self.name, action=self)
return enabled(None, context)
def perform(self, *args, **kwargs):
parameters = self._parameters # Only once cause it is costly
value = None
d = defer.Deferred()
try:
if len(args) > 0:
values = list(args)
values += [kwargs[u"value"]] if u"value" in kwargs else []
if len(values) > 1:
raise TypeError("Action %s can only have one value: %s"
% (self.name,
", ".join([repr(v) for v in values])))
if args:
kwargs[u"value"] = args[0]
params = set(kwargs.keys())
expected = set(parameters.keys())
required = set([p.name for p in parameters.itervalues()
if p.is_required])
if not required <= params:
raise TypeError("Action %s require parameters: %s"
% (self.name, ", ".join(required)))
if not params <= expected:
if not expected:
raise TypeError("Action %s expect no parameter"
% (self.name, ))
raise TypeError("Action %s expect only parameters: %s"
% (self.name, ", ".join(expected)))
validated = {}
for param_name, param_value in kwargs.iteritems():
info = parameters[param_name].value_info
validated[param_name] = IValidator(info).validate(param_value)
for param in parameters.itervalues():
if not param.is_required:
info = param.value_info
if param.name not in validated and info.use_default:
validated[param.name] = info.default
value = validated.pop(u"value", None)
# We use the model name instead of the action name as key
maker = IContextMaker(self.model)
context = maker.make_context(action=self)
def log_effect_Error(failure, effect):
error.handle_failure(None, failure,
"Failure during effect %s execution",
effect.func_name)
return failure
for effect in self._effects:
try:
d.addCallback(effect, context, **validated)
d.addErrback(log_effect_Error, effect)
except AssertionError:
err = ValueError("Invalid action effect: %r" % (effect, ))
return defer.fail(err)
if self._result_info is not None:
d.addCallback(IValidator(self._result_info).publish)
else:
d.addCallback(defer.override_result, None)
except ValueError:
return defer.fail()
except TypeError:
return defer.fail()
else:
d.callback(value)
return d
for p, m in errors.iteritems())
msg = ("Action %s parameter(s) invalid: %s"
% (self.name, param_errors))
raise InvalidParameters(msg, params=errors)
for param in parameters:
if not param.is_required:
info = param.value_info
if param.name not in validated and info.use_default:
validated[param.name] = info.default
value = validated.pop(u"value", None)
# We use the model name instead of the action name as key
maker = IContextMaker(self.model)
context = maker.make_context(action=self)
def log_effect_Error(failure, effect):
error.handle_failure(None, failure,
"Failure during effect %s execution",
effect.func_name)
return failure
for effect in self._effects:
try:
d.addCallback(effect, context, **validated)
d.addErrback(log_effect_Error, effect)
except AssertionError:
err = ValueError("Invalid action effect: %r" % (effect, ))
failure = Failure(err, exc_tb=sys.exc_info()[2])
return defer.fail(failure)