3.4.5. Change Sources¶
This is the base class for change sources.
Change sources which are active on every master should, instead, override
This is a subclass of
ChangeSourcewhich adds polling behavior. Its constructor accepts the
pollAtLauncharguments as documented for most built-in change sources.
Subclasses should override the
pollmethod. This method may return a Deferred. Calls to
pollwill not overlap.