[zeromq-dev] czmq examples / reactor shut down

Luca Boccassi luca.boccassi at gmail.com
Fri Feb 16 19:44:34 CET 2018

On Fri, 2018-02-16 at 18:13 +0000, Georger, Joseph wrote:
> Hey all,
> Big ZMQ fan, love the guide.  Lately I’ve been trying to step up to
> CZMQ for a project. I was wondering if there were any plans to update
> the CZMQ examples there with ones conforming to the latest API?  I
> always found the examples helpful. All I see in CZMQ are code
> snippets, I would love to see a fully worked out reactor / zloop
> example using zactor handlers.  I’m confused as to how to shut it
> down properly / how the actors handle $TERM….
> Thanks,
> Joe

It should definitely be done - but there aren't plans as such,
contributions are welcome.

To use zloop + zactor you can to do something like:

int zactor_term(zloop_t *loop, zsock_t *s, void *arg)
        int interrupt = 0;
        char *msg = zstr_recv (s);

        if (zsys_interrupted || (msg && !strcmp(msg, "$TERM")))
                interrupt = -1;

        return interrupt;

void actor (zsock_t *pipe, void *args)
	zloop_t *loop = zloop_new ();
	assert (loop);

	zloop_reader(loop, pipe, zactor_term, NULL);
	// zloop_reader (...) // as many other readers as you need
	zsock_signal (pipe, 0);

	while (!zsys_interrupted) {
		if (zloop_start (loop) != 0)
			break; // termination received

	// zsock_destroy (...) // if any
	zloop_destroy (&loop);

Kind regards,
Luca Boccassi
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