def _create_fn_schedule(self,
dag,
arg,
target,
fnames,
consistency=NORMAL):
schedule = DagSchedule()
schedule.id = 'id'
schedule.dag.CopyFrom(dag)
schedule.target_function = target
schedule.consistency = consistency
# The BEGIN trigger is sent by the scheduler.
schedule.triggers.append('BEGIN')
# We set all locations as thread ID 0.
for fname in fnames:
schedule.locations[fname] = self.ip + ':0'
val = schedule.arguments[target].values.add()
# Set the square function's argument.
serializer.dump(arg, val, False)
schedule.start_time = time.time()
# Create a trigger corresponding to this DAG.
trigger = DagTrigger()
trigger.id = schedule.id
trigger.target_function = schedule.target_function
trigger.source = 'BEGIN'
return schedule, {'BEGIN': trigger}
def call_dag(call, pusher_cache, dags, policy):
dag, sources = dags[call.name]
schedule = DagSchedule()
schedule.id = str(uuid.uuid4())
schedule.dag.CopyFrom(dag)
schedule.start_time = time.time()
schedule.consistency = call.consistency
if call.response_address:
schedule.response_address = call.response_address
if call.output_key:
schedule.output_key = call.output_key
if call.client_id:
schedule.client_id = call.client_id
for fref in dag.functions:
args = call.function_args[fref.name].values
refs = list(
filter(lambda arg: type(arg) == CloudburstReference,
map(lambda arg: serializer.load(arg), args)))
result = policy.pick_executor(refs, fref.name)
if result is None:
response = GenericResponse()
response.success = False
response.error = NO_RESOURCES
return response
ip, tid = result
schedule.locations[fref.name] = ip + ':' + str(tid)
# copy over arguments into the dag schedule
arg_list = schedule.arguments[fref.name]
arg_list.values.extend(args)
for fref in dag.functions:
loc = schedule.locations[fref.name].split(':')
ip = utils.get_queue_address(loc[0], loc[1])
schedule.target_function = fref.name
triggers = sutils.get_dag_predecessors(dag, fref.name)
if len(triggers) == 0:
triggers.append('BEGIN')
schedule.ClearField('triggers')
schedule.triggers.extend(triggers)
sckt = pusher_cache.get(ip)
sckt.send(schedule.SerializeToString())
for source in sources:
trigger = DagTrigger()
trigger.id = schedule.id
trigger.source = 'BEGIN'
trigger.target_function = source
ip = sutils.get_dag_trigger_address(schedule.locations[source])
sckt = pusher_cache.get(ip)
sckt.send(trigger.SerializeToString())
response = GenericResponse()
response.success = True
if schedule.output_key:
response.response_id = schedule.output_key
else:
response.response_id = schedule.id
return response