import enum
[docs]class TransitionError(Exception):
"""Raised when a transition from one state to another is illegal"""
def __init__(self, prev, next, msg):
self.prev = prev
self.next = next
self.msg = msg
[docs]class JobState(enum.Enum):
initialized = 1
created = 2
up = 3
down = 4
destroyed = 5
crashed = 6
error = 7