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simulator.py
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simulator.py
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import tasks
import time
from time import sleep
from case import Case
from logger import Logger
from visualize_case import VisualizeCase
from redis.exceptions import ConnectionError
class TaskState(object):
def __init__(self, delayed_callable, meta_data=[]):
self._callable = delayed_callable
self._delayed_task = None
self._meta_data = meta_data
self._start_time = -1
self._args = None
self._kwargs = None
def issue(self, *args, **kwargs):
self._args = args
self._kwargs = kwargs
self._delayed_task = self._callable(*self._args, **self._kwargs)
self._start_time = time.time()
def reissue(self):
self._delayed_task.revoke(terminate=True)
self._delayed_task = self._callable(*self._args, **self._kwargs)
self._start_time = time.time()
def revoke(self):
self._delayed_task.revoke(terminate=True)
def status(self):
count = 3
e = None
for i in range(3):
try:
return self._delayed_task.status
except ConnectionError as e:
count += 1
print "Failed getting status"
raise e
def has_timedout(self):
if self.status() == "SUCCESS":
return False
delta = time.time() - self._start_time
return delta > 60.*5
class TaskGroup(object):
def __init__(self, delayed_callable):
self._callable = delayed_callable
self._tasks = []
self._retried = 0
self._failed = 0
self._started = 0
self._timedout = 0
def add_task(self, meta_data, *args, **kwargs):
async_task = TaskState(self._callable, meta_data)
async_task.issue(*args, **kwargs)
self._tasks.append(async_task)
self._started += 1
def _filter_statuses(self, statuses):
pending = len(filter(lambda x: x == "PENDING", statuses))
finished = len(filter(lambda x: x == "SUCCESS", statuses))
failed = len(filter(lambda x: x == "FAILURE", statuses))
return {"started": self._started, "timedout": self._timedout, "pending": pending, "finished": finished, "failed": self._failed+failed, "retried": self._retried }
def get_statuses(self):
statuses = []
for async_task in self._tasks:
statuses.append(async_task.status())
filtered_statuses = self._filter_statuses(statuses)
return filtered_statuses
def _check_on_tasks(self):
statuses = []
for i,task_state in enumerate(self._tasks):
status = task_state.status()
if task_state.has_timedout() or status == "FAILURE":
if status == "FAILURE":
self._failed += 1
else:
self._timedout += 1
task_state.reissue()
status = task_state.status()
self._retried += 1
statuses.append(status)
filtered_statuses = self._filter_statuses(statuses)
return filtered_statuses
def run(self):
statuses = self.get_statuses()
task_count = len(self._tasks)
finished_count = statuses["finished"]
try:
while statuses["finished"] < task_count:
statuses = self._check_on_tasks()
sleep(1.)
if statuses["finished"] != finished_count:
self.print_statuses(statuses)
finished_count = statuses["finished"]
except (AssertionError, KeyboardInterrupt, SystemExit), e:
for async_task in self._tasks:
async_task.revoke()
print "Exiting."
raise SystemExit
def print_statuses(self, statuses=[]):
if len(statuses) == 0:
statuses = self.get_statuses()
for key, value in statuses.items():
print key, value
print
def results(self):
statuses = self.get_statuses()
if statuses["finished"] < len(self._tasks):
print "Not finished, wait a bit before requesting results"
return None
results = [(async_task._meta_data, async_task._delayed_task.result) for async_task in self._tasks]
[async_task._delayed_task.forget() for async_task in self._tasks]
return results
def run_simulations_parallel(pairs):
tg = TaskGroup(tasks.run_case.delay)
solutions = {}
for i, (solution, case_configs) in enumerate(pairs):
solutions[i] = solution
for case_config in case_configs:
tg.add_task(i, case_config)
tg.run()
results_per_solution = {}
for i, log in tg.results():
if results_per_solution.get(i) is None:
results_per_solution[i] = []
results_per_solution[i].append(log)
return [(solution, results_per_solution[i]) for i, solution in solutions.items()]
def run_simulation(config, visualize=False):
case = Case(config)
if visualize:
visualization = VisualizeCase(case)
else:
visualization = None
logger = Logger(case, None, prefix_folder="logs")
with logger as open_logger:
with case as expanded_case:
expanded_case.run(logger=open_logger, visualization=visualization)
print "Completed simulation: %s" % str(case)
if visualization is not None:
visualization.close()
return logger
def run_simulations_serial(pairs, visualize=False):
k_logs = []
for k, case_configs in pairs:
logs = [run_simulation(case_config, visualize) for case_config in case_configs]
k_logs.append((k, logs))
return k_logs