[Twisted-Python] How to stuff new events into the core event loop?

exarkun at divmod.com exarkun at divmod.com
Fri Oct 15 12:27:02 EDT 2004

On Fri, 15 Oct 2004 17:47:51 +0200, "Ames Andreas (MPA/DF)" <Andreas.Ames at tenovis.com> wrote:
>Hello all,
> I'm pretty new to twisted activity (just some doc and code reading so
> far).  So please be forbearing if the answers to the following
> questions are obvious.
> I'm wrapping some C library which implements some networked client to
> use it from python, i.e. from a twisted app.  Within the guts of this
> lib there is a thread created (i.e. it is normally never seen by
> python).  This thread manages some heartbeat mechanism.  I, as a user
> of this API, can register a callback with the lib.  This callback is
> called _within the context of this underground thread_, when the
> connection to the server is lost (as recognised through the
> heartbeat).  Now my first question is, how you would stuff that event
> (loss of server connection) into the core event loop?

  To post an event to the reactor:

    reactor.callFromThread(f, *a, **kw)

  For example, in your connection lost callback, you might wish to do something like this:

    def blahblahConnectionLost(connectionId, exitStatus, monkeys):
            Failure(Exception(exitStatus, monkeys)))


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