mirror of
https://github.com/zeromq/libzmq.git
synced 2024-12-12 18:40:27 +01:00
96 lines
2.7 KiB
C++
96 lines
2.7 KiB
C++
/*
|
|
Copyright (c) 2007-2013 Contributors as noted in the AUTHORS file
|
|
|
|
This file is part of 0MQ.
|
|
|
|
0MQ is free software; you can redistribute it and/or modify it under
|
|
the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
0MQ is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "../include/zmq.h"
|
|
#include <stdio.h>
|
|
#include <time.h>
|
|
#undef NDEBUG
|
|
#include <assert.h>
|
|
|
|
int main (void)
|
|
{
|
|
void *ctx = zmq_ctx_new ();
|
|
assert (ctx);
|
|
|
|
// First, create an intermediate device
|
|
void *xpub = zmq_socket (ctx, ZMQ_XPUB);
|
|
assert (xpub);
|
|
int rc = zmq_bind (xpub, "tcp://127.0.0.1:5560");
|
|
assert (rc == 0);
|
|
void *xsub = zmq_socket (ctx, ZMQ_XSUB);
|
|
assert (xsub);
|
|
rc = zmq_bind (xsub, "tcp://127.0.0.1:5561");
|
|
assert (rc == 0);
|
|
|
|
// Create a publisher
|
|
void *pub = zmq_socket (ctx, ZMQ_PUB);
|
|
assert (pub);
|
|
rc = zmq_connect (pub, "tcp://127.0.0.1:5561");
|
|
assert (rc == 0);
|
|
|
|
// Create a subscriber
|
|
void *sub = zmq_socket (ctx, ZMQ_SUB);
|
|
assert (sub);
|
|
rc = zmq_connect (sub, "tcp://127.0.0.1:5560");
|
|
assert (rc == 0);
|
|
|
|
// Subscribe for all messages.
|
|
rc = zmq_setsockopt (sub, ZMQ_SUBSCRIBE, "", 0);
|
|
assert (rc == 0);
|
|
|
|
// Pass the subscription upstream through the device
|
|
char buff [32];
|
|
rc = zmq_recv (xpub, buff, sizeof (buff), 0);
|
|
assert (rc >= 0);
|
|
rc = zmq_send (xsub, buff, rc, 0);
|
|
assert (rc >= 0);
|
|
|
|
// Wait a bit till the subscription gets to the publisher
|
|
struct timespec t = { 0, 250 * 1000000 };
|
|
nanosleep (&t, NULL);
|
|
|
|
// Send an empty message
|
|
rc = zmq_send (pub, NULL, 0, 0);
|
|
assert (rc == 0);
|
|
|
|
// Pass the message downstream through the device
|
|
rc = zmq_recv (xsub, buff, sizeof (buff), 0);
|
|
assert (rc >= 0);
|
|
rc = zmq_send (xpub, buff, rc, 0);
|
|
assert (rc >= 0);
|
|
|
|
// Receive the message in the subscriber
|
|
rc = zmq_recv (sub, buff, sizeof (buff), 0);
|
|
assert (rc == 0);
|
|
|
|
// Clean up.
|
|
rc = zmq_close (xpub);
|
|
assert (rc == 0);
|
|
rc = zmq_close (xsub);
|
|
assert (rc == 0);
|
|
rc = zmq_close (pub);
|
|
assert (rc == 0);
|
|
rc = zmq_close (sub);
|
|
assert (rc == 0);
|
|
rc = zmq_ctx_term (ctx);
|
|
assert (rc == 0);
|
|
|
|
return 0 ;
|
|
}
|