def get_packing_plan(self, topologyName, callback=None):
""" get packing plan """
if callback:
self.packing_plan_watchers[topologyName].append(callback)
else:
packing_plan_path = self.get_packing_plan_path(topologyName)
with open(packing_plan_path) as f:
data = f.read()
packing_plan = PackingPlan()
packing_plan.ParseFromString(data)
def watch_packing_plan(data, stats, event):
""" watch the packing plan for updates """
if data:
packing_plan = PackingPlan()
packing_plan.ParseFromString(data)
callback(packing_plan)
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
