def gen(self, name):
'''
Atomically get/gen an EventBus and incref.
(requires ctor during BusRef init)
Args:
name (str): The name/iden of the EventBus instance.
'''
if self.ctor is None:
raise s_common.NoSuchCtor(name=name,
mesg='BusRef.gen() requires ctor')
with self.lock:
ebus = self.ebus_by_name.get(name)
if ebus is None:
ebus = self.ctor(name)
if ebus is not None:
def fini():
self.ebus_by_name.pop(name, None)
ebus.onfini(fini)
self.ebus_by_name[name] = ebus
else:
ebus.incref()
return ebus
def getCellCtor(dirn, conf=None):
'''
Find the ctor option for a cell and resolve the function.
'''
ctor = None
if conf is not None:
ctor = conf.get('ctor')
path = s_common.genpath(dirn, 'config.json')
if ctor is None and os.path.isfile(path):
subconf = s_common.jsload(path)
ctor = subconf.get('ctor')
if ctor is None:
raise s_common.ReqConfOpt(mesg='Missing ctor, cannot divide',
name='ctor')
func = s_dyndeps.getDynLocal(ctor)
if func is None:
raise s_common.NoSuchCtor(mesg='Cannot resolve ctor',
name=ctor)
return ctor, func
def getCellCtor(dirn, conf=None):
'''
Find the ctor option for a Cell and resolve the function.
Args:
dirn (str): The path to the Cell directory. This may contain the the
ctor in the ``config.json`` file.
conf (dict): Configuration dictionary for the cell. This may contain
the ctor in the ``ctor`` key.
Returns:
((str, function)): The python path to the ctor function and the resolved function.
Raises:
ReqConfOpt: If the ctor cannot be resolved from the cell path or conf
NoSuchCtor: If the ctor function cannot be resolved.
'''
ctor = None
if conf is not None:
ctor = conf.get('ctor')
path = s_common.genpath(dirn, 'config.json')
if ctor is None and os.path.isfile(path):
subconf = s_common.jsload(path)
ctor = subconf.get('ctor')
if ctor is None:
raise s_common.ReqConfOpt(mesg='Missing ctor, cannot divide',
name='ctor')
func = s_dyndeps.getDynLocal(ctor)
if func is None:
raise s_common.NoSuchCtor(mesg='Cannot resolve ctor', name=ctor)
return ctor, func