def __getitem__(self, key):
"""
单例字典魔术方法，返回键key对应的值
:param str key: 键参数
:return: 键对应的值
:rtype: str
:raises: KeyError 键对应的值不存在
"""
try:
return dict.__getitem__(self, key)
except KeyError:
raise exception.EMissingParam("key [{}] not exist".format(key))
def get_action(self, name):
"""
获取一个执行进度
:param str name: 执行进度名
:return: 执行进度
:rtype: Action
:raises EMissingParam: 缺少参数异常
"""
match_action = filter(lambda x: x.name == name, self.actions)
try:
action = match_action[0]
except IndexError:
raise exception.EMissingParam("action:{} not found".format(name))
return action
def on_message(self, message):
"""
触发执行并返回结果，``on_execute_message`` 可能为同步或异步操作，
若为异步操作，则返回结果并非本次执行的结果，
需要根据ret中EXECUTOR_OPERATION_ID字段确定是哪个操作的结果
:param Message message: 消息对象
:return: 无返回
:rtype: None
:raises ETypeMismatch: 返回值类型不匹配
:raises EMissingParam: 返回值缺字段
"""
ret = self.on_execute_message(message)
log.info("execute message return:{}".format(ret))
if not ret:
return
elif not isinstance(ret, dict):
raise exception.ETypeMismatch()
elif EXECUTOR_OPERATION_ID not in ret:
raise exception.EMissingParam()
else:
message = OperationMessage("COMPLETE_MESSAGE",
ret[EXECUTOR_OPERATION_ID], ret)
self.send(message)
def test_singledict_getitem_exception(self):
are.common.SingleDict._instance = None
sd = are.common.SingleDict({"test": 1})
self.assertRaises(exception.EMissingParam("key [test2] not exist"))