def test_task_server(self):
# Create some stats
t_now = datetime.utcnow()
dm.save_object(SystemStats(
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, t_now - timedelta(minutes=5), t_now
))
# We should now have stats
sys_stats = dm.search_system_stats(t_now - timedelta(minutes=60), t_now)
self.assertGreater(len(sys_stats), 0)
# Check current task list entries
tasks = dm.list_objects(Task, order_field=Task.id)
task_list_len = len(tasks)
# Post a background task to purge the stats
KEEP_SECS = 10
task_obj = tm.add_task(
None,
'Purge system statistics',
'purge_system_stats',
{'before_time': t_now},
Task.PRIORITY_NORMAL,
'info', 'error',
KEEP_SECS
)
self.assertIsNotNone(task_obj)
# Check it really got added
tasks = dm.list_objects(Task, order_field=Task.id)
self.assertEqual(len(tasks), task_list_len + 1)
task_list_len = len(tasks)
# Post it again, make sure there is no dupe added
dupe_task_obj = tm.add_task(
None,
'Purge system statistics',
'purge_system_stats',
{'before_time': t_now},
Task.PRIORITY_NORMAL,
'info', 'error',
KEEP_SECS
)
self.assertIsNone(dupe_task_obj)
# Check it really didn't get re-added
tasks = dm.list_objects(Task, order_field=Task.id)
self.assertEqual(len(tasks), task_list_len)
task = tasks[-1]
self.assertEqual(task.id, task_obj.id)
# Wait for task completion
tm.wait_for_task(task_obj.id, 20)
# We should now have no stats
t_now = datetime.utcnow()
sys_stats = dm.search_system_stats(t_now - timedelta(minutes=60), t_now)
self.assertEqual(len(sys_stats), 0)
# The completed task should only be removed after the delay we specified
task = dm.get_object(Task, task_obj.id)
self.assertIsNotNone(task)
self.assertEqual(task.status, Task.STATUS_COMPLETE)
# Wait for keep time + task server's poll time
time.sleep(KEEP_SECS + 10)
# Should now be gone
task = dm.get_object(Task, task_obj.id)
self.assertIsNone(task)
def test_task_result_none(self):
# Test no return value
task_obj = tm.add_task(None, 'Test return values', 'test_result_task',
{
'raise_exception': False,
'return_value': None
}, Task.PRIORITY_NORMAL, 'info', 'error', 5)
self.assertIsNotNone(task_obj)
tm.wait_for_task(task_obj.id, 10)
task_obj = tm.get_task(task_obj.id, decode_attrs=True)
self.assertIsNone(task_obj.result)
dm.delete_object(task_obj)
def test_task_result_object(self):
# Test normal return value
task_obj = tm.add_task(
None, 'Test return values', 'test_result_task',
{'raise_exception': False, 'return_value': {'my_bool': True}},
Task.PRIORITY_NORMAL, 'info', 'error', 5
)
self.assertIsNotNone(task_obj)
tm.wait_for_task(task_obj.id, 20)
task_obj = tm.get_task(task_obj.id, decode_attrs=True)
self.assertEqual(task_obj.result, {'my_bool': True})
dm.delete_object(task_obj)
def test_task_server(self):
# Create some stats
t_now = datetime.utcnow()
dm.save_object(
SystemStats(1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
t_now - timedelta(minutes=5), t_now))
# We should now have stats
sys_stats = dm.search_system_stats(t_now - timedelta(minutes=60),
t_now)
self.assertGreater(len(sys_stats), 0)
# Check current task list entries
tasks = dm.list_objects(Task, order_field=Task.id)
task_list_len = len(tasks)
# Post a background task to purge the stats
KEEP_SECS = 10
task_obj = tm.add_task(None, 'Purge system statistics',
'purge_system_stats', {'before_time': t_now},
Task.PRIORITY_NORMAL, 'info', 'error',
KEEP_SECS)
self.assertIsNotNone(task_obj)
# Check it really got added
tasks = dm.list_objects(Task, order_field=Task.id)
self.assertEqual(len(tasks), task_list_len + 1)
task_list_len = len(tasks)
# Post it again, make sure there is no dupe added
dupe_task_obj = tm.add_task(None, 'Purge system statistics',
'purge_system_stats',
{'before_time': t_now},
Task.PRIORITY_NORMAL, 'info', 'error',
KEEP_SECS)
self.assertIsNone(dupe_task_obj)
# Check it really didn't get re-added
tasks = dm.list_objects(Task, order_field=Task.id)
self.assertEqual(len(tasks), task_list_len)
task = tasks[-1]
self.assertEqual(task.id, task_obj.id)
# Wait for task completion
tm.wait_for_task(task_obj.id, 10)
# We should now have no stats
t_now = datetime.utcnow()
sys_stats = dm.search_system_stats(t_now - timedelta(minutes=60),
t_now)
self.assertEqual(len(sys_stats), 0)
# The completed task should only be removed after the delay we specified
task = dm.get_object(Task, task_obj.id)
self.assertIsNotNone(task)
self.assertEqual(task.status, Task.STATUS_COMPLETE)
# Wait for keep time + task server's poll time
time.sleep(KEEP_SECS + 10)
# Should now be gone
task = dm.get_object(Task, task_obj.id)
self.assertIsNone(task)
def test_task_result_exception(self):
# Test exception raised
task_obj = tm.add_task(
None, 'Test return values', 'test_result_task',
{'raise_exception': True, 'return_value': None},
Task.PRIORITY_NORMAL, 'info', 'error', 5
)
self.assertIsNotNone(task_obj)
tm.wait_for_task(task_obj.id, 20)
task_obj = tm.get_task(task_obj.id, decode_attrs=True)
self.assertIsInstance(task_obj.result, ValueError)
self.assertEqual(repr(task_obj.result), repr(ValueError('An error happened')))
dm.delete_object(task_obj)
def test_task_result_exception(self):
# Test exception raised
task_obj = tm.add_task(None, 'Test return values', 'test_result_task',
{
'raise_exception': True,
'return_value': None
}, Task.PRIORITY_NORMAL, 'info', 'error', 5)
self.assertIsNotNone(task_obj)
tm.wait_for_task(task_obj.id, 10)
task_obj = tm.get_task(task_obj.id, decode_attrs=True)
self.assertIsInstance(task_obj.result, ValueError)
self.assertEqual(repr(task_obj.result),
repr(ValueError('An error happened')))
dm.delete_object(task_obj)
def _task_response(self, task, timeout_secs):
task_completed = False
try:
# Wait for task to complete
task = task_engine.wait_for_task(task.id, timeout_secs)
if task is None:
# Someone else deleted it? Shouldn't normally get here.
raise TimeoutError()
task_completed = True
# Return the updated folder (or raise the exception)
if isinstance(task.result, Exception):
raise task.result
return make_api_success_response(object_to_dict(task.result))
except TimeoutError:
# Return a 202 "task ongoing" response
task_dict = object_to_dict(task) if task is not None else None
# Decode the params before returning
if task_dict and task_dict.get('params'):
task_dict['params'] = pickle.loads(task_dict['params'])
return make_api_success_response(task_dict, task_accepted=True)
finally:
if task and task_completed:
try:
# Delete the task so another API call can be made immediately
data_engine.delete_object(task)
except Exception:
pass
