def event_processing(event, ctx=None, **params):
"""Process input event in getting graph nodes bound to input event entity.
If at least one graph nodes is found, execute its tasks.
"""
nodes = []
if ctx is None:
ctx = {}
entity = context.get_entity(event)
if entity is not None:
entity_id = context.get_entity_id(entity)
nodes = graph.get_nodes(entity_id=entity_id)
for node in nodes:
task = node[Graph.TASK]
if task is not None:
run_task(
event=event,
task=task,
ctx=ctx,
node=node
)
return event
def condition(condition=None, statement=None, _else=None, **kwargs):
"""
Run an statement if input condition is checked and return statement result.
:param condition: condition to check.
:type condition: str or dict
:param statement: statement to process if condition is checked.
:type statement: str or dict
:param _else: else statement.
:type _else: str or dict
:param kwargs: condition and statement additional parameters.
:return: statement result.
"""
result = None
checked = False
if condition is not None:
checked = run_task(condition, **kwargs)
if checked: # if condition is checked
if statement is not None: # process statement
result = run_task(statement, **kwargs)
elif _else is not None: # else process _else statement
result = run_task(_else, **kwargs)
return result
def test_exception_without_raise(self):
"""
Test task which raises an exception.
"""
result = run_task('test_exception', raiseerror=False)
self.assertTrue(isinstance(result, Exception))
def test_simple(self):
"""
Test simple task.
"""
result = run_task('test')
self.assertIs(result, self)
def _any(confs=None, **kwargs):
"""
True iif at least one input condition is equivalent to True.
:param confs: confs to check.
:type confs: list or dict or str
:param kwargs: additional task kwargs.
:return: True if at least one condition is checked (compared to True, but
not an strict equivalence to True). False otherwise.
:rtype: bool
"""
result = False
if confs is not None:
# ensure confs is a list
if isinstance(confs, (basestring, dict)):
confs = [confs]
for conf in confs:
result = run_task(conf, **kwargs)
if result: # leave function as soon as a result if True
break
return result
def _all(confs=None, **kwargs):
"""
True iif all input confs are True.
:param confs: confs to check.
:type confs: list or dict or str
:param kwargs: additional task kwargs.
:return: True if all conditions are checked. False otherwise.
:rtype: bool
"""
result = False
if confs is not None:
# ensure confs is a list
if isinstance(confs, (basestring, dict)):
confs = [confs]
# if at least one conf exists, result is True by default
result = True
for conf in confs:
result = run_task(conf, **kwargs)
# stop when a result is False
if not result:
break
return result
def test_simple_params(self):
"""
Test task with params
"""
conf = new_conf('test_params', **{'a': 1, 'b': 2})
result = run_task(conf, ctx={'a': 1})
self.assertEqual(result, 5)
def process(self, event, **kwargs):
"""Process this vertice task in a context of event processing.
"""
result = None
task = self.task
result = run_task(conf=task, vertice=self, event=event, **kwargs)
return result
def _not(condition=None, **kwargs):
"""
Return the opposite of input condition.
:param condition: condition to process.
:result: not condition.
:rtype: bool
"""
result = True
if condition is not None:
result = not run_task(condition, **kwargs)
return result
def switch(
confs=None, remain=False, all_checked=False, _default=None, **kwargs
):
"""
Execute first statement among conf where task result is True.
If remain, process all statements conf starting from the first checked
conf.
:param confs: task confs to check. Each one may contain a task action at
the key 'action' in conf.
:type confs: str or dict or list
:param bool remain: if True, execute all remaining actions after the
first checked condition.
:param bool all_checked: execute all statements where conditions are
checked.
:param _default: default task to process if others have not been checked.
:type _default: str or dict
:return: statement result or list of statement results if remain.
:rtype: list or object
"""
# init result
result = [] if remain else None
# check if remain and one task has already been checked.
remaining = False
if confs is not None:
if isinstance(confs, (basestring, dict)):
confs = [confs]
for conf in confs:
# check if task has to be checked or not
check = remaining
if not check:
# try to check current conf
check = run_task(conf=conf, **kwargs)
# if task is checked or remaining
if check:
if STATEMENT in conf: # if statements exist, run them
statement = conf[STATEMENT]
statement_result = run_task(statement, **kwargs)
# save result
if not remain: # if not remain, result is statement_result
result = statement_result
else: # else, add statement_result to result
result.append(statement_result)
# if remain
if remain:
# change of remaining status
if not remaining:
remaining = True
elif all_checked:
pass
else: # leave execution if one statement has been executed
break
# process _default statement if necessary
if _default is not None and (remaining or (not result) or all_checked):
last_result = run_task(_default, **kwargs)
if not remain:
result = last_result
else:
result.append(last_result)
return result
