def _change_state(self, engine, state, result=None, progress=None):
"""Update result and change state."""
old_state = engine.storage.get_task_state(self.uuid)
if not states.check_task_transition(old_state, state):
return False
if state in SAVE_RESULT_STATES:
engine.storage.save(self.uuid, result, state)
else:
engine.storage.set_task_state(self.uuid, state)
if progress is not None:
engine.storage.set_task_progress(self.uuid, progress)
engine._on_task_state_change(self, state, result=result)
return True
def _is_ready_for_revert(self, task):
"""Checks if task is ready to be reverted."""
state = self._storage.get_task_state(task.name)
if not st.check_task_transition(state, st.REVERTING):
return False
task_names = []
for prev_task in self._graph.successors(task):
task_names.append(prev_task.name)
task_states = self._storage.get_tasks_states(task_names)
return all(state in (st.PENDING, st.REVERTED) for state in six.itervalues(task_states))
def _is_ready_for_execute(self, task):
"""Checks if task is ready to be executed."""
state = self._storage.get_task_state(task.name)
if not st.check_task_transition(state, st.RUNNING):
return False
task_names = []
for prev_task in self._graph.predecessors(task):
task_names.append(prev_task.name)
task_states = self._storage.get_tasks_states(task_names)
return all(state == st.SUCCESS for state in six.itervalues(task_states))
def test_invalid_task_states(self):
invalids = [
# Not a comprhensive set/listing...
(states.RUNNING, states.PENDING),
(states.PENDING, states.REVERTED),
(states.PENDING, states.SUCCESS),
(states.PENDING, states.FAILURE),
(states.RETRYING, states.PENDING),
]
for start_state, end_state in invalids:
# TODO(harlowja): fix this so that it raises instead of
# returning false...
self.assertFalse(
states.check_task_transition(start_state, end_state))
def _is_ready_for_execute(self, task):
"""Checks if task is ready to be executed."""
state = self._storage.get_task_state(task.name)
if not st.check_task_transition(state, st.RUNNING):
return False
task_names = []
for prev_task in self._graph.predecessors(task):
task_names.append(prev_task.name)
task_states = self._storage.get_tasks_states(task_names)
return all(state == st.SUCCESS
for state in six.itervalues(task_states))
def test_invalid_task_states(self):
invalids = [
# Not a comprhensive set/listing...
(states.RUNNING, states.PENDING),
(states.PENDING, states.REVERTED),
(states.PENDING, states.SUCCESS),
(states.PENDING, states.FAILURE),
(states.RETRYING, states.PENDING),
]
for start_state, end_state in invalids:
# TODO(harlowja): fix this so that it raises instead of
# returning false...
self.assertFalse(
states.check_task_transition(start_state, end_state))
def _is_ready_for_execute(self, task):
"""Checks if task is ready to be executed."""
state = self.get_state(task)
intention = self._storage.get_atom_intention(task.name)
transition = st.check_task_transition(state, st.RUNNING)
if not transition or intention != st.EXECUTE:
return False
task_names = []
for prev_task in self._execution_graph.predecessors(task):
task_names.append(prev_task.name)
task_states = self._storage.get_atoms_states(task_names)
return all(state == st.SUCCESS and intention == st.EXECUTE
for state, intention in six.itervalues(task_states))
def _is_ready_for_revert(self, task):
"""Checks if task is ready to be reverted."""
state = self.get_state(task)
intention = self._storage.get_atom_intention(task.name)
transition = st.check_task_transition(state, st.REVERTING)
if not transition or intention not in (st.REVERT, st.RETRY):
return False
task_names = []
for prev_task in self._execution_graph.successors(task):
task_names.append(prev_task.name)
task_states = self._storage.get_atoms_states(task_names)
return all(state in (st.PENDING, st.REVERTED)
for state, intention in six.itervalues(task_states))
def _is_ready_for_execute(self, task):
"""Checks if task is ready to be executed."""
state = self.get_state(task)
intention = self._storage.get_atom_intention(task.name)
transition = st.check_task_transition(state, st.RUNNING)
if not transition or intention != st.EXECUTE:
return False
task_names = []
for prev_task in self._graph.predecessors(task):
task_names.append(prev_task.name)
task_states = self._storage.get_atoms_states(task_names)
return all(state == st.SUCCESS and intention == st.EXECUTE
for state, intention in six.itervalues(task_states))
def _is_ready_for_revert(self, task):
"""Checks if task is ready to be reverted."""
state = self.get_state(task)
intention = self._storage.get_atom_intention(task.name)
transition = st.check_task_transition(state, st.REVERTING)
if not transition or intention not in (st.REVERT, st.RETRY):
return False
task_names = []
for prev_task in self._execution_graph.successors(task):
task_names.append(prev_task.name)
task_states = self._storage.get_atoms_states(task_names)
return all(state in (st.PENDING, st.REVERTED)
for state, intention in six.itervalues(task_states))
def _change_state(self, task, state, result=None, progress=None):
old_state = self._storage.get_task_state(task.name)
if not states.check_task_transition(old_state, state):
return False
if state in SAVE_RESULT_STATES:
self._storage.save(task.name, result, state)
else:
self._storage.set_task_state(task.name, state)
if progress is not None:
self._storage.set_task_progress(task.name, progress)
task_uuid = self._storage.get_task_uuid(task.name)
details = dict(task_name=task.name, task_uuid=task_uuid, result=result)
self._notifier.notify(state, details)
if progress is not None:
task.update_progress(progress)
return True
def _change_state(self, task, state, result=None, progress=None):
old_state = self._storage.get_task_state(task.name)
if not states.check_task_transition(old_state, state):
return False
if state in SAVE_RESULT_STATES:
self._storage.save(task.name, result, state)
else:
self._storage.set_task_state(task.name, state)
if progress is not None:
self._storage.set_task_progress(task.name, progress)
task_uuid = self._storage.get_task_uuid(task.name)
details = dict(task_name=task.name,
task_uuid=task_uuid,
result=result)
self._notifier.notify(state, details)
if progress is not None:
task.update_progress(progress)
return True
def test_valid_task_states(self):
for start_state, end_state in states._ALLOWED_TASK_TRANSITIONS:
self.assertTrue(states.check_task_transition(start_state,
end_state))
def test_valid_task_states(self):
for start_state, end_state in states._ALLOWED_TASK_TRANSITIONS:
self.assertTrue(
states.check_task_transition(start_state, end_state))
