yr.save_state

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yr.save_state#

yr.save_state(timeout_sec: int = 30) → None[source]#

Used to save the instance status.

Parameters:

timeout_sec (int, optional) – The timeout in seconds. Defaults to 30.

Returns:

None.

Raises:

  • RuntimeError – If save_state is called in local mode, an exception is raised with the message: save_state is not called in local mode.

  • RuntimeError – If save_state is called in cloud mode without using the POSIX API, an exception is raised with the message: save_state is only called on cloud with POSIX API.

  • RuntimeError – If save_state fails to retrieve the saved instance state, an exception is raised with the message: Failed to save state.

Example

>>> @yr.instance
... class Counter:
...     def __init__(self):
...         self.cnt = 0
...
...     def add(self):
...         self.cnt += 1
...         return self.cnt
...
...     def get(self):
...         return self.cnt
...
...     def save(self, timeout=30):
...         yr.save_state(timeout)
...
...     def load(self, timeout=30):
...         yr.load_state(timeout)
...
>>> counter = Counter.invoke()
>>> print(f"member value before save state: {yr.get(counter.get.invoke())}")
>>> counter.save.invoke()
>>>
>>> counter.add.invoke()
>>> print(f"member value after add one: {yr.get(counter.get.invoke())}")
>>>
>>> counter.load.invoke()
>>> print(f"member value after load state(back to 0): {yr.get(counter.get.invoke())}")
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