def run(self, tasklet, **kwds):
"""Run a tasklet with retry.
The retry should be transparent to the caller: if no results
are successful, the exception or result from the last retry is returned
to the caller.
Args:
tasklet: the tasklet to run.
**kwds: keywords arguments to run the tasklet.
Raises:
The exception from running the tasklet.
Returns:
The result from running the tasklet.
"""
start_time = time.time()
n = 1
while True:
e = None
result = None
got_result = False
try:
result = yield tasklet(**kwds)
got_result = True
if not self.should_retry(result):
raise ndb.Return(result)
except runtime.DeadlineExceededError:
logging.debug(
'Tasklet has exceeded request deadline after %s seconds total',
time.time() - start_time)
raise
except self.retriable_exceptions, e:
pass
if n == 1:
logging.debug('Tasklet is %r', tasklet)
delay = self.retry_params.delay(n, start_time)
if delay <= 0:
logging.debug(
'Tasklet failed after %s attempts and %s seconds in total',
n, time.time() - start_time)
if got_result:
raise ndb.Return(result)
elif e is not None:
raise e
else:
assert False, 'Should never reach here.'
if got_result:
logging.debug(
'Got result %r from tasklet.', result)
else:
logging.debug(
'Got exception "%r" from tasklet.', e)
logging.debug('Retry in %s seconds.', delay)
n += 1
yield tasklets.sleep(delay)
def run(self, tasklet, **kwds):
"""Run a tasklet with retry.
The retry should be transparent to the caller: if no results
are successful, the exception or result from the last retry is returned
to the caller.
Args:
tasklet: the tasklet to run.
**kwds: keywords arguments to run the tasklet.
Raises:
The exception from running the tasklet.
Returns:
The result from running the tasklet.
"""
start_time = time.time()
n = 1
while True:
e = None
result = None
got_result = False
try:
result = yield tasklet(**kwds)
got_result = True
if not self.should_retry(result):
raise ndb.Return(result)
except runtime.DeadlineExceededError:
logging.debug(
'Tasklet has exceeded request deadline after %s seconds total',
time.time() - start_time)
raise
except self.retriable_exceptions, e:
pass
if n == 1:
logging.debug('Tasklet is %r', tasklet)
delay = self.retry_params.delay(n, start_time)
if delay <= 0:
logging.debug(
'Tasklet failed after %s attempts and %s seconds in total',
n,
time.time() - start_time)
if got_result:
raise ndb.Return(result)
elif e is not None:
raise e
else:
assert False, 'Should never reach here.'
if got_result:
logging.debug('Got result %r from tasklet.', result)
else:
logging.debug('Got exception "%r" from tasklet.', e)
logging.debug('Retry in %s seconds.', delay)
n += 1
yield tasklets.sleep(delay)
