def cancel(self, storage_handler=None):
# TODO Figure out a better way for this function to have
# access to a custom storage handler
if storage_handler is None:
storage_config = wrenconfig.extract_storage_config(
wrenconfig.default())
storage_handler = storage.Storage(storage_config)
storage_handler.put_cancelled(self.callset_id, self.call_id, "CANCEL")
def handle_generic_failure(future, failed_warc_paths, exc):
if future not in failed_warc_paths:
failed_warc_paths.add(future)
print('A future failed with error: %s' % exc)
print('')
storage_config = wrenconfig.extract_storage_config(
wrenconfig.default())
storage_handler = storage.Storage(storage_config)
call_status = storage_handler.get_call_status(future.callset_id,
future.call_id)
exception_traceback = call_status.get('exception_traceback', None)
if exception_traceback is not None:
print(exception_traceback)
else:
exc_type, exc_value, exc_traceback = sys.exc_info()
traceback.print_tb(exc_traceback)
def result(self,
timeout=None,
check_only=False,
throw_except=True,
storage_handler=None):
"""
check_only = True implies we only check if the job is completed.
# FIXME check_only is the worst API and should be refactored
# out to be part of done()
From the python docs:
Return the value returned by the call. If the call hasn't yet
completed then this method will wait up to timeout seconds. If
the call hasn't completed in timeout seconds then a
TimeoutError will be raised. timeout can be an int or float.If
timeout is not specified or None then there is no limit to the
wait time.
Return the value returned by the call.
If the call raised an exception, this method will raise the same exception
If the future is cancelled before completing then CancelledError will be raised.
:param timeout: This method will wait up to timeout seconds before raising
a TimeoutError if function hasn't completed. If None, wait indefinitely. Default None.
:param check_only: Return None immediately if job is not complete. Default False.
:param throw_except: Reraise exception if call raised. Default true.
:param storage_handler: Storage handler to poll cloud storage. Default None.
:return: Result of the call.
:raises CancelledError: If the job is cancelled before completed.
:raises TimeoutError: If job is not complete after `timeout` seconds.
"""
if self._state == JobState.new:
raise ValueError("job not yet invoked")
if check_only:
if self._state == JobState.success or self._state == JobState.error:
return True
if self._state == JobState.success:
return self._return_val
if self._state == JobState.error:
if throw_except:
raise self._exception
else:
return None
if storage_handler is None:
storage_config = wrenconfig.extract_storage_config(
wrenconfig.default())
storage_handler = storage.Storage(storage_config)
storage_utils.check_storage_path(storage_handler.get_storage_config(),
self.storage_path)
call_status = storage_handler.get_call_status(self.callset_id,
self.call_id)
self.status_query_count += 1
## FIXME implement timeout
if timeout is not None:
raise NotImplementedError()
if check_only:
if call_status is None:
return False
else:
return True
while call_status is None:
time.sleep(self.GET_RESULT_SLEEP_SECS)
call_status = storage_handler.get_call_status(
self.callset_id, self.call_id)
self.status_query_count += 1
self._invoke_metadata['status_done_timestamp'] = time.time()
self._invoke_metadata['status_query_count'] = self.status_query_count
self.run_status = call_status # this is the remote status information
self.invoke_status = self._invoke_metadata # local status information
if call_status['exception'] is not None:
# the wrenhandler had an exception
exception_str = call_status['exception']
exception_args = call_status['exception_args']
if exception_args[0] == "WRONGVERSION":
if throw_except:
raise Exception("Pywren version mismatch: remote " + \
"expected version {}, local library is version {}".format(
exception_args[2], exception_args[3]))
return None
elif exception_args[0] == "OUTATIME":
if throw_except:
raise Exception("process ran out of time")
return None
elif exception_args[0] == "CANCELLED":
if throw_except:
raise Exception("job was cancelled")
elif exception_args[0] == "RETCODE":
if throw_except:
raise Exception(
"python process failed, returned a non-zero return code"
"(check stdout for information)")
return None
else:
if throw_except:
if 'exception_traceback' in call_status:
logger.error(call_status['exception_traceback'])
raise Exception(exception_str, *exception_args)
return None
# FIXME this shouldn't be called if check_only is True
call_output_time = time.time()
call_invoker_result = pickle.loads(
storage_handler.get_call_output(self.callset_id, self.call_id))
call_output_time_done = time.time()
self._invoke_metadata[
'download_output_time'] = call_output_time_done - call_output_time
self._invoke_metadata[
'download_output_timestamp'] = call_output_time_done
call_success = call_invoker_result['success']
logger.info("ResponseFuture.result() {} {} call_success {}".format(
self.callset_id, self.call_id, call_success))
self._call_invoker_result = call_invoker_result
if call_success:
self._return_val = call_invoker_result['result']
self._set_state(JobState.success)
return self._return_val
else:
self._set_state(JobState.error)
self._exception = call_invoker_result['result']
self._traceback = (call_invoker_result['exc_type'],
call_invoker_result['exc_value'],
call_invoker_result['exc_traceback'])
if throw_except:
if call_invoker_result.get('pickle_fail', False):
logging.warning(
"there was an error pickling. The original exception: " + \
"{}\nThe pickling exception: {}".format(
call_invoker_result['exc_value'],
str(call_invoker_result['pickle_exception'])))
reraise(Exception, call_invoker_result['exc_value'],
call_invoker_result['exc_traceback'])
else:
# reraise the exception
reraise(*self._traceback)
else:
return None # nothing, don't raise, no value
def result(self,
timeout=None,
check_only=False,
throw_except=True,
storage_handler=None):
"""
From the python docs:
Return the value returned by the call. If the call hasn't yet
completed then this method will wait up to timeout seconds. If
the call hasn't completed in timeout seconds then a
TimeoutError will be raised. timeout can be an int or float.If
timeout is not specified or None then there is no limit to the
wait time.
If the future is cancelled before completing then CancelledError will be raised.
If the call raised then this method will raise the same exception.
"""
if self._state == JobState.new:
raise ValueError("job not yet invoked")
if self._state == JobState.success:
return self._return_val
if self._state == JobState.error:
if throw_except:
raise self._exception
else:
return None
if storage_handler is None:
storage_config = wrenconfig.extract_storage_config(
wrenconfig.default())
storage_handler = storage.Storage(storage_config)
storage_utils.check_storage_path(storage_handler.get_storage_config(),
self.storage_path)
call_status = storage_handler.get_call_status(self.callset_id,
self.call_id)
self.status_query_count += 1
## FIXME implement timeout
if timeout is not None:
raise NotImplementedError()
if check_only is True:
if call_status is None:
return None
while call_status is None:
time.sleep(self.GET_RESULT_SLEEP_SECS)
call_status = storage_handler.get_call_status(
self.callset_id, self.call_id)
self.status_query_count += 1
self._invoke_metadata['status_done_timestamp'] = time.time()
self._invoke_metadata['status_query_count'] = self.status_query_count
self.run_status = call_status # this is the remote status information
self.invoke_status = self._invoke_metadata # local status information
print self.callset_id
if call_status['exception'] is not None:
# the wrenhandler had an exception
exception_str = call_status['exception']
print(call_status)
exception_args = call_status['exception_args']
if exception_args[0] == "WRONGVERSION":
if throw_except:
raise Exception("Pywren version mismatch: remote " + \
"expected version {}, local library is version {}".format(
exception_args[2], exception_args[3]))
return None
elif exception_args[0] == "OUTATIME":
if throw_except:
raise Exception("process ran out of time")
return None
else:
if throw_except:
if 'exception_traceback' in call_status:
logger.error(call_status['exception_traceback'])
raise Exception(exception_str, *exception_args)
return None
call_output_time = time.time()
call_invoker_result = pickle.loads(
storage_handler.get_call_output(self.callset_id, self.call_id))
call_output_time_done = time.time()
self._invoke_metadata[
'download_output_time'] = call_output_time_done - call_output_time
self._invoke_metadata[
'download_output_timestamp'] = call_output_time_done
call_success = call_invoker_result['success']
logger.info("ResponseFuture.result() {} {} call_success {}".format(
self.callset_id, self.call_id, call_success))
self._call_invoker_result = call_invoker_result
if call_success:
self._return_val = call_invoker_result['result']
self._state = JobState.success
return self._return_val
elif throw_except:
print "exception"
self._exception = call_invoker_result['result']
self._traceback = (call_invoker_result['exc_type'],
call_invoker_result['exc_value'],
call_invoker_result['exc_traceback'])
self._state = JobState.error
if call_invoker_result.get('pickle_fail', False):
logging.warning(
"there was an error pickling. The original exception: " + \
"{}\nThe pickling exception: {}".format(
call_invoker_result['exc_value'],
str(call_invoker_result['pickle_exception'])))
reraise(Exception, call_invoker_result['exc_value'],
call_invoker_result['exc_traceback'])
else:
# reraise the exception
reraise(*self._traceback)
else:
return None # nothing, don't raise, no value
