def get_tmaster(self, topologyName, callback=None):
if callback:
self.tmaster_watchers[topologyName].append(callback)
else:
tmaster_path = self.get_tmaster_path(topologyName)
with open(tmaster_path) as f:
data = f.read()
tmaster = TMasterLocation()
tmaster.ParseFromString(data)
return tmaster
def watch_tmaster(data, stats):
if data:
tmaster = TMasterLocation()
tmaster.ParseFromString(data)
callback(tmaster)
else:
callback(None)
# Returning False will result in no future watches
# being triggered. If isWatching is True, then
# the future watches will be triggered.
return isWatching