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"""
Tests for Layer1 of Simple Workflow
"""
import time
import uuid
import json
import traceback
from boto.swf.layer1_decisions import Layer1Decisions
from tests.integration.swf.test_layer1 import SimpleWorkflowLayer1TestBase
class SwfL1WorkflowExecutionTest(SimpleWorkflowLayer1TestBase):
"""
test a simple workflow execution
"""
swf = True
def run_decider(self):
"""
run one iteration of a simple decision engine
"""
# Poll for a decision task.
tries = 0
while True:
dtask = self.conn.poll_for_decision_task(self._domain,
self._task_list, reverse_order=True)
if dtask.get('taskToken') is not None:
# This means a real decision task has arrived.
break
time.sleep(2)
tries += 1
if tries > 10:
# Give up if it's taking too long. Probably
# means something is broken somewhere else.
assert False, 'no decision task occurred'
# Get the most recent interesting event.
ignorable = (
'DecisionTaskScheduled',
'DecisionTaskStarted',
'DecisionTaskTimedOut',
)
event = None
for tevent in dtask['events']:
if tevent['eventType'] not in ignorable:
event = tevent
break
# Construct the decision response.
decisions = Layer1Decisions()
if event['eventType'] == 'WorkflowExecutionStarted':
activity_id = str(uuid.uuid1())
decisions.schedule_activity_task(activity_id,
self._activity_type_name, self._activity_type_version,
task_list=self._task_list,
input=event['workflowExecutionStartedEventAttributes']['input'])
elif event['eventType'] == 'ActivityTaskCompleted':
decisions.complete_workflow_execution(
result=event['activityTaskCompletedEventAttributes']['result'])
elif event['eventType'] == 'ActivityTaskFailed':
decisions.fail_workflow_execution(
reason=event['activityTaskFailedEventAttributes']['reason'],
details=event['activityTaskFailedEventAttributes']['details'])
else:
decisions.fail_workflow_execution(
reason='unhandled decision task type; %r' % (event['eventType'],))
# Send the decision response.
r = self.conn.respond_decision_task_completed(dtask['taskToken'],
decisions=decisions._data,
execution_context=None)
assert r is None
def run_worker(self):
"""
run one iteration of a simple worker engine
"""
# Poll for an activity task.
tries = 0
while True:
atask = self.conn.poll_for_activity_task(self._domain,
self._task_list, identity='test worker')
if atask.get('activityId') is not None:
# This means a real activity task has arrived.
break
time.sleep(2)
tries += 1
if tries > 10:
# Give up if it's taking too long. Probably
# means something is broken somewhere else.
assert False, 'no activity task occurred'
# Do the work or catch a "work exception."
reason = None
try:
result = json.dumps(sum(json.loads(atask['input'])))
except:
reason = 'an exception was raised'
details = traceback.format_exc()
if reason is None:
r = self.conn.respond_activity_task_completed(
atask['taskToken'], result)
else:
r = self.conn.respond_activity_task_failed(
atask['taskToken'], reason=reason, details=details)
assert r is None
def test_workflow_execution(self):
# Start a workflow execution whose activity task will succeed.
workflow_id = 'wfid-%.2f' % (time.time(),)
r = self.conn.start_workflow_execution(self._domain,
workflow_id,
self._workflow_type_name,
self._workflow_type_version,
execution_start_to_close_timeout='20',
input='[600, 15]')
# Need the run_id to lookup the execution history later.
run_id = r['runId']
# Move the workflow execution forward by having the
# decider schedule an activity task.
self.run_decider()
# Run the worker to handle the scheduled activity task.
self.run_worker()
# Complete the workflow execution by having the
# decider close it down.
self.run_decider()
# Check that the result was stored in the execution history.
r = self.conn.get_workflow_execution_history(self._domain,
run_id, workflow_id,
reverse_order=True)['events'][0]
result = r['workflowExecutionCompletedEventAttributes']['result']
assert json.loads(result) == 615
def test_failed_workflow_execution(self):
# Start a workflow execution whose activity task will fail.
workflow_id = 'wfid-%.2f' % (time.time(),)
r = self.conn.start_workflow_execution(self._domain,
workflow_id,
self._workflow_type_name,
self._workflow_type_version,
execution_start_to_close_timeout='20',
input='[600, "s"]')
# Need the run_id to lookup the execution history later.
run_id = r['runId']
# Move the workflow execution forward by having the
# decider schedule an activity task.
self.run_decider()
# Run the worker to handle the scheduled activity task.
self.run_worker()
# Complete the workflow execution by having the
# decider close it down.
self.run_decider()
# Check that the failure was stored in the execution history.
r = self.conn.get_workflow_execution_history(self._domain,
run_id, workflow_id,
reverse_order=True)['events'][0]
reason = r['workflowExecutionFailedEventAttributes']['reason']
assert reason == 'an exception was raised'
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