def run_pipeline_by_id(cls, id):
"""Runs a pipeline by id.
:param str id:
"""
log.info('Running pipeline: {}'.format(id))
PipelineScheduleService.pre_run_schedule(id)
# get graph
graph_data = TaskConnectionService.build_graph_for_pipeline(id)
# process graph
queue = deque()
for source_id in graph_data['source_ids']:
queue.appendleft((source_id, None))
while len(queue):
task_id, data = queue.pop()
try:
task_response = TaskService.process_task_with_data(task_id, data)
try:
for next_id in graph_data['graph'][task_id]:
queue.appendleft((next_id, task_response))
except KeyError:
# end of list
pass
except StopProcessingException:
pass
PipelineScheduleService.post_run_schedule(id)
def test_write_task_connection(self):
"""Test that the provided entity gets written to the repository."""
entity = TaskConnectionEntity.get_mock_object()
self.assertEquals(
TaskConnectionService.fetch_task_connections_for_pipeline(entity.pipeline_id),
[],
)
TaskConnectionService.write_task_connection(entity)
self.assertEquals(
TaskConnectionService.fetch_task_connections_for_pipeline(entity.pipeline_id),
[
entity,
],
)
def test_fetch_task_connections_for_pipeline(self, mock_fetch):
"""Test that a list of TaskConnectionEntities is returned."""
mock_fetch.return_value = [
self.url_to_log_connection,
self.raw_input_to_log_connection,
]
entities = TaskConnectionService.fetch_task_connections_for_pipeline(self.pipeline.id)
self.assertEqual(entities[0].id, self.url_to_log_connection.id)
def test_build_graph_for_pipeline(self, mock_fetch):
"""Test that a graph is returned when given a pipeline id."""
mock_fetch.return_value = [
self.url_to_log_connection,
self.raw_input_to_log_connection,
]
graph_data = TaskConnectionService.build_graph_for_pipeline(self.pipeline.id)
self.assertEquals(graph_data['graph'], {
self.url_to_log_connection.from_task_id: set([
self.url_to_log_connection.to_task_id,
]),
self.raw_input_to_log_connection.from_task_id: set([
self.raw_input_to_log_connection.to_task_id,
])
})
self.assertItemsEqual(graph_data['source_ids'], [
self.raw_input_to_log_connection.from_task_id,
self.url_to_log_connection.from_task_id,
])
def import_pipeline(cls, pipeline_data):
if not pipeline_data.get('pipeline'):
raise Exception('pipeline data is required')
if not pipeline_data.get('pipeline_schedule'):
raise Exception('pipeline schedule data is required')
if not pipeline_data.get('tasks'):
raise Exception('task data is required')
if not pipeline_data.get('task_connections'):
raise Exception('task connections are required')
# Create Pipeline
pipeline_entity = PipelineEntity(pipeline_data['pipeline'])
pipeline_entity.validate()
# Create PipelineSchedule
pipeline_schedule_entity = PipelineScheduleEntity(pipeline_data['pipeline_schedule'])
pipeline_schedule_entity.pipeline_id = pipeline_entity.id
pipeline_schedule_entity.next_run_at = (
PipelineScheduleService.calculate_next_run_at_for_schedule(
pipeline_schedule_entity
)
)
pipeline_schedule_entity.validate()
# Create Tasks
task_entities = []
task_alias_to_id = {}
for task_alias, task_data in pipeline_data['tasks'].items():
task_entity = TaskEntity(task_data)
task_entity.validate()
task_entities.append(task_entity)
task_alias_to_id[task_alias] = task_entity.id
# Create TaskConnections
task_connection_entities = []
for from_alias, to_aliases in pipeline_data['task_connections'].items():
from_task_id = task_alias_to_id[from_alias]
for to_alias in to_aliases:
task_connection_entity = TaskConnectionEntity({
'from_task_id': from_task_id,
'to_task_id': task_alias_to_id[to_alias],
'pipeline_id': pipeline_entity.id,
})
task_connection_entity.validate()
task_connection_entities.append(task_connection_entity)
# Save Pipeline
PipelineService.write_pipeline(pipeline_entity)
# Save PipelineSchedule (enabled = False)
PipelineScheduleService.write_pipeline_schedule(pipeline_schedule_entity)
# Save Tasks
for task_entity in task_entities:
TaskService.write_task(task_entity)
# Save TaskConnections
for task_connection_entity in task_connection_entities:
TaskConnectionService.write_task_connection(task_connection_entity)
return pipeline_entity
