# Tai Sakuma <tai.sakuma@gmail.com>
import logging
import time
from operator import itemgetter
from collections import deque
from .WorkingArea import WorkingArea
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[docs]class TaskPackageDropbox(object):
"""A drop box for task packages.
It puts task packages in a working area and dispatches runners
that execute the tasks.
"""
[docs] def __init__(self, workingArea, dispatcher, sleep=5):
self.workingArea = workingArea
self.dispatcher = dispatcher
self.sleep = sleep
def __repr__(self):
name_value_pairs = (
('workingArea', self.workingArea),
('dispatcher', self.dispatcher),
)
return '{}({})'.format(
self.__class__.__name__,
', '.join(['{}={!r}'.format(n, v) for n, v in name_value_pairs]),
)
def open(self):
self.workingArea.open()
self.runid_pkgidx_map = { }
self.to_return = deque() # pairs of pkgidxs and results
def put(self, package):
"""Put a package. Return a package index.
"""
pkgidx = self.workingArea.put_package(package)
logger = logging.getLogger(__name__)
logger.info('submitting {}'.format(self.workingArea.package_path(pkgidx)))
runid = self.dispatcher.run(self.workingArea, pkgidx)
self.runid_pkgidx_map[runid] = pkgidx
return pkgidx
def put_multiple(self, packages):
"""Put multiple packages. Return package indices.
"""
pkgidxs = [self.workingArea.put_package(p) for p in packages ]
logger = logging.getLogger(__name__)
logger.info('submitting {}'.format(
', '.join(['{}'.format(self.workingArea.package_path(i)) for i in pkgidxs])
))
runids = self.dispatcher.run_multiple(self.workingArea, pkgidxs)
self.runid_pkgidx_map.update(zip(runids, pkgidxs))
return pkgidxs
def poll(self):
"""Return pairs of package indices and results of finished tasks.
"""
pairs = list(self.to_return)
self.to_return.clear()
pairs.extend(self._collect_pkgidx_result_pairs_of_finished_tasks())
pairs = sorted(pairs, key=itemgetter(0))
return pairs
def receive_one(self):
"""Return a pair of a package index and result.
This method waits until a task finishes.
This method returns None if no task is running.
"""
if self.to_return:
return self.to_return.popleft()
if not self.runid_pkgidx_map:
return None
while not self.to_return:
pairs = self._collect_pkgidx_result_pairs_of_finished_tasks()
self.to_return.extend(pairs)
time.sleep(self.sleep)
return self.to_return.popleft()
def receive(self):
"""Return pairs of package indices and results.
This method waits until all tasks finish.
"""
pkgidx_result_pairs = list(self.to_return)
self.to_return.clear()
while self.runid_pkgidx_map:
pairs = self._collect_pkgidx_result_pairs_of_finished_tasks()
pkgidx_result_pairs.extend(pairs)
time.sleep(self.sleep)
# sort in the order of pkgidx
pkgidx_result_pairs = sorted(pkgidx_result_pairs, key=itemgetter(0))
return pkgidx_result_pairs
def _collect_pkgidx_result_pairs_of_finished_tasks(self):
finished_runid = self.dispatcher.poll()
# e.g., [1001, 1003]
runid_pkgidx = [(i, self.runid_pkgidx_map.pop(i)) for i in finished_runid]
# e.g., [(1001, 0), (1003, 2)]
runid_pkgidx_result = [(ri, pi, self.workingArea.collect_result(pi)) for ri, pi in runid_pkgidx]
# e.g., [(1001, 0, result0), (1003, 2, None)] # None indicates the job failed
failed = [e for e in runid_pkgidx_result if e[2] is None]
# e.g., [(1003, 2, None)]
succeeded = [e for e in runid_pkgidx_result if e not in failed]
# e.g., [(1001, 0, result0)]
# let the dispatcher know the failed runid
failed_runid = [e[0] for e in failed]
self.dispatcher.failed_runids(failed_runid)
# rerun failed jobs
for _, pkgidx, _ in failed:
logger = logging.getLogger(__name__)
logger.warning('resubmitting {}'.format(self.workingArea.package_path(pkgidx)))
runid = self.dispatcher.run(self.workingArea, pkgidx)
self.runid_pkgidx_map[runid] = pkgidx
pairs = [(pkgidx, result) for runid, pkgidx, result in succeeded]
# e.g., [(0, result0)] # only successful ones
return pairs
def terminate(self):
self.dispatcher.terminate()
def close(self):
self.workingArea.close()
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