Class t.f.s.Callback(Stage):

Part of twisted.flow.stage View Source View In Hierarchy

Converts a single-thread push interface into a pull interface.

Once this stage is constructed, its result, errback, and finish member variables may be called by a producer. The results of which can be obtained by yielding the Callback and then calling next().

For example:

   source = flow.Callback()
   reactor.callLater(0, lambda: source.result("one"))
   reactor.callLater(.5, lambda: source.result("two"))
   reactor.callLater(1, lambda: source.finish())
   printFlow(source)

Split Table into Classes Show Methods in One Table

Line #	Kind	Name	Docs
208	Class	Instruction	Undocumented
213	Method	__init__	Undocumented
217	Method	result	called by the producer to indicate a successful result
221	Method	finish	called by producer to indicate successful stream completion
226	Method	errback	called by the producer in case of Failure
230	Method	_yield	executed during a yield statement by previous stage

Inherited from Stage:

Line #	Kind	Name	Docs
170	Method	__iter__	Undocumented
173	Method	next	return current result

Line #	Kind	Name	Docs
213	Method	__init__	Undocumented
170	Method	__iter__	Undocumented
226	Method	errback	called by the producer in case of Failure
221	Method	finish	called by producer to indicate successful stream completion
208	Class	Instruction	Undocumented
173	Method	next	return current result
217	Method	result	called by the producer to indicate a successful result
230	Method	_yield	executed during a yield statement by previous stage

def __init__(self, *trap): (source)

overrides twisted.flow.base.Stage.__init__

Undocumented

def result(self, result): (source)

called by the producer to indicate a successful result

def finish(self): (source)

called by producer to indicate successful stream completion

def errback(self, fail): (source)

called by the producer in case of Failure

def _yield(self): (source)

overrides twisted.flow.base.Stage._yield

executed during a yield statement by previous stage

This method is private within the scope of the flow module, it is used by one stage in the flow to ask a subsequent stage to produce its value. The result of the yield is then stored in self.result and is an instance of Failure if a problem occurred.

API Documentation for Twisted, generated by pydoctor at 2008-10-26 16:12:37.