Ronald,
My understanding is that those signals are defined by the operating system and
are interrupts that occur when certain events happen. So for instance, if your
program was in an infinite loop and the user pressed CTRL-C, an interrupt
signal, SIGINT, would be generated. The signal module defines an API to handle
those signals for various operating systems. What you have to do is define a
function to handle a particular signal, see this for more information:
http://stackoverflow.com/questions/1112343/how-do-i-capture-sigint-in-python
The example below includes a SIGINT interrupt handler.
import signal
import sys
import zmq
incoming = None
outgoing = None
context = None
def startForwarder():
context = zmq.Context(1)
incoming = context.socket(zmq.SUB)
try:
incoming.connect("tcp://127.0.0.1:5551");
incoming.setsockopt(zmq.SUBSCRIBE, "")
except:
print("incoming socket is already open")
try:
outgoing = context.socket(zmq.PUB)
outgoing.bind('tcp://127.0.0.1:5562')
except:
print("outgoing socket is also open close it")
zmq.device(zmq.FORWARDER, incoming, outgoing)
def signal_handler(signal, frame):
global incoming, outgoing, context
incoming.close()
outgoing.close()
context.term()
sys.exit(0)
signal.signal(signal.SIGINT, signal_handler)
startForwarder()
Ronald, also when you say it runs the first time, but you get a ZMQError
subsequently, how are you terminating your program? Your answer to this
question will let you know which signals you need to define handlers for.
--
Cornelius Toole
Sent with Sparrow (http://www.sparrowmailapp.com)
--
Cornelius Toole
Sent with Sparrow (http://www.sparrowmailapp.com)
On Thursday, March 15, 2012 at 11:36 PM, Symbian Projects wrote:
> Hello Justin
>
> Can you tell me where these signals are defined, like in PyZMQ or somewhere
> else i am not able to use them. :-(
>
> > From: [email protected] (mailto:[email protected])
> > Date: Thu, 15 Mar 2012 14:59:31 +0000
> > To: [email protected] (mailto:[email protected])
> > Subject: Re: [zeromq-dev] FW: Help With Regard To the ZMQ Forwarder
> >
> > At the bottom of the Python docs for signal module:
> >
> > http://docs.python.org/library/signal.html
> >
> > On Thu, Mar 15, 2012 at 1:46 PM, Symbian Projects <[email protected]
> > (mailto:[email protected])> wrote:
> > > Oh are there any documentation about this signal handlers, from them they
> > > seems to be very useful.
> > >
> > > Or can you help me with a small snippet to use any one of them??
> >
> > --
> > Justin Cook
> > _______________________________________________
> > zeromq-dev mailing list
> > [email protected] (mailto:[email protected])
> > http://lists.zeromq.org/mailman/listinfo/zeromq-dev
> _______________________________________________
> zeromq-dev mailing list
> [email protected] (mailto:[email protected])
> http://lists.zeromq.org/mailman/listinfo/zeromq-dev
>
>
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