def _get_maybe_ready_for_revert(self, atom):
"""Returns if an atom is *likely* ready to be reverted."""
def ready_checker(succ_connected_it):
for succ in succ_connected_it:
succ_atom, (succ_atom_state, _succ_atom_intention) = succ
if succ_atom_state not in (st.PENDING, st.REVERTED, st.IGNORE):
LOG.trace("Unable to begin to revert since successor"
" atom '%s' is in state %s", succ_atom,
succ_atom_state)
return False
LOG.trace("Able to let '%s' revert", atom)
return True
noop_decider = deciders.NoOpDecider()
connected_fetcher = lambda: \
traversal.depth_first_iterate(self._execution_graph, atom,
# Whether the desired atom
# can revert is dependent on its
# successors states (thus why we
# look forwards).
traversal.Direction.FORWARD)
decider_fetcher = lambda: noop_decider
# If this atoms current state is able to be transitioned to REVERTING
# and its intention is either REVERT or RETRY and all of its
# successors are either PENDING or REVERTED then this atom is ready
# to revert.
LOG.trace("Checking if '%s' is ready to revert", atom)
return self._get_maybe_ready(atom, st.REVERTING, [st.REVERT, st.RETRY],
connected_fetcher, ready_checker,
decider_fetcher, for_what='revert')
def _get_maybe_ready_for_revert(self, atom):
"""Returns if an atom is *likely* ready to be reverted."""
def ready_checker(succ_connected_it):
for succ in succ_connected_it:
succ_atom, (succ_atom_state, _succ_atom_intention) = succ
if succ_atom_state not in (st.PENDING, st.REVERTED, st.IGNORE):
LOG.trace("Unable to begin to revert since successor"
" atom '%s' is in state %s", succ_atom,
succ_atom_state)
return False
LOG.trace("Able to let '%s' revert", atom)
return True
noop_decider = deciders.NoOpDecider()
connected_fetcher = lambda: \
traversal.depth_first_iterate(self._execution_graph, atom,
# Whether the desired atom
# can revert is dependent on its
# successors states (thus why we
# look forwards).
traversal.Direction.FORWARD)
decider_fetcher = lambda: noop_decider
# If this atoms current state is able to be transitioned to REVERTING
# and its intention is either REVERT or RETRY and all of its
# successors are either PENDING or REVERTED then this atom is ready
# to revert.
LOG.trace("Checking if '%s' is ready to revert", atom)
return self._get_maybe_ready(atom, st.REVERTING, [st.REVERT, st.RETRY],
connected_fetcher, ready_checker,
decider_fetcher, for_what='revert')
def _get_maybe_ready_for_execute(self, atom):
"""Returns if an atom is *likely* ready to be executed."""
def ready_checker(pred_connected_it):
for pred in pred_connected_it:
pred_atom, (pred_atom_state, pred_atom_intention) = pred
if (pred_atom_state in (st.SUCCESS, st.IGNORE) and
pred_atom_intention in (st.EXECUTE, st.IGNORE)):
continue
LOG.trace("Unable to begin to execute since predecessor"
" atom '%s' is in state %s with intention %s",
pred_atom, pred_atom_state, pred_atom_intention)
return False
LOG.trace("Able to let '%s' execute", atom)
return True
decider_fetcher = lambda: \
deciders.IgnoreDecider(
atom, self._runtime.fetch_edge_deciders(atom))
connected_fetcher = lambda: \
traversal.depth_first_iterate(self._execution_graph, atom,
# Whether the desired atom
# can execute is dependent on its
# predecessors outcomes (thus why
# we look backwards).
traversal.Direction.BACKWARD)
# If this atoms current state is able to be transitioned to RUNNING
# and its intention is to EXECUTE and all of its predecessors executed
# successfully or were ignored then this atom is ready to execute.
LOG.trace("Checking if '%s' is ready to execute", atom)
return self._get_maybe_ready(atom, st.RUNNING, [st.EXECUTE],
connected_fetcher, ready_checker,
decider_fetcher, for_what='execute')
def _get_maybe_ready_for_execute(self, atom):
"""Returns if an atom is *likely* ready to be executed."""
def ready_checker(pred_connected_it):
for pred in pred_connected_it:
pred_atom, (pred_atom_state, pred_atom_intention) = pred
if (pred_atom_state in (st.SUCCESS, st.IGNORE) and
pred_atom_intention in (st.EXECUTE, st.IGNORE)):
continue
LOG.trace("Unable to begin to execute since predecessor"
" atom '%s' is in state %s with intention %s",
pred_atom, pred_atom_state, pred_atom_intention)
return False
LOG.trace("Able to let '%s' execute", atom)
return True
decider_fetcher = lambda: \
deciders.IgnoreDecider(
atom, self._runtime.fetch_edge_deciders(atom))
connected_fetcher = lambda: \
traversal.depth_first_iterate(self._execution_graph, atom,
# Whether the desired atom
# can execute is dependent on its
# predecessors outcomes (thus why
# we look backwards).
traversal.Direction.BACKWARD)
# If this atoms current state is able to be transitioned to RUNNING
# and its intention is to EXECUTE and all of its predecessors executed
# successfully or were ignored then this atom is ready to execute.
LOG.trace("Checking if '%s' is ready to execute", atom)
return self._get_maybe_ready(atom, st.RUNNING, [st.EXECUTE],
connected_fetcher, ready_checker,
decider_fetcher, for_what='execute')
def _affect_all_successors(atom, runtime):
execution_graph = runtime.compilation.execution_graph
successors_iter = traversal.depth_first_iterate(
execution_graph, atom, traversal.Direction.FORWARD)
runtime.reset_atoms(itertools.chain([atom], successors_iter),
state=states.IGNORE,
intention=states.IGNORE)
def reset_subgraph(self, atom, state=st.PENDING, intention=st.EXECUTE):
"""Resets a atoms subgraph to the given state and intention.
The subgraph is contained of **all** of the atoms successors.
"""
execution_graph = self._compilation.execution_graph
atoms_it = tr.depth_first_iterate(execution_graph, atom,
tr.Direction.FORWARD)
return self.reset_atoms(atoms_it, state=state, intention=intention)
def reset_subgraph(self, atom, state=st.PENDING, intention=st.EXECUTE):
"""Resets a atoms subgraph to the given state and intention.
The subgraph is contained of **all** of the atoms successors.
"""
execution_graph = self._compilation.execution_graph
atoms_it = tr.depth_first_iterate(execution_graph, atom,
tr.Direction.FORWARD)
return self.reset_atoms(atoms_it, state=state, intention=intention)
def _affect_successor_tasks_in_same_flow(atom, runtime):
execution_graph = runtime.compilation.execution_graph
successors_iter = traversal.depth_first_iterate(
execution_graph, atom, traversal.Direction.FORWARD,
# Do not go through nested flows but do follow *all* tasks that
# are directly connected in this same flow (thus the reason this is
# called the same flow decider); retries are direct successors
# of flows, so they should also be not traversed through, but
# setting this explicitly ensures that.
through_flows=False, through_retries=False)
runtime.reset_atoms(itertools.chain([atom], successors_iter),
state=states.IGNORE, intention=states.IGNORE)
def _affect_all_successors(atom, runtime):
execution_graph = runtime.compilation.execution_graph
successors_iter = traversal.depth_first_iterate(
execution_graph, atom, traversal.Direction.FORWARD)
runtime.reset_atoms(itertools.chain([atom], successors_iter),
state=states.IGNORE, intention=states.IGNORE)