mirror of
https://github.com/zeromq/libzmq.git
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476 lines
14 KiB
C++
476 lines
14 KiB
C++
/*
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Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
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This file is part of libzmq, the ZeroMQ core engine in C++.
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libzmq is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License (LGPL) as published
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by the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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As a special exception, the Contributors give you permission to link
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this library with independent modules to produce an executable,
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regardless of the license terms of these independent modules, and to
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copy and distribute the resulting executable under terms of your choice,
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provided that you also meet, for each linked independent module, the
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terms and conditions of the license of that module. An independent
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module is a module which is not derived from or based on this library.
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If you modify this library, you must extend this exception to your
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version of the library.
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libzmq is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "testutil.hpp"
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int test_basic()
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{
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void *ctx = zmq_ctx_new ();
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assert (ctx);
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// Create a publisher
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void *pub = zmq_socket (ctx, ZMQ_XPUB);
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assert (pub);
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int rc = zmq_bind (pub, "inproc://soname");
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assert (rc == 0);
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// set pub socket options
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int manual = 1;
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rc = zmq_setsockopt(pub, ZMQ_XPUB_MANUAL, &manual, 4);
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assert (rc == 0);
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// Create a subscriber
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void *sub = zmq_socket (ctx, ZMQ_XSUB);
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assert (sub);
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rc = zmq_connect (sub, "inproc://soname");
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assert (rc == 0);
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// Subscribe for A
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char subscription[2] = { 1, 'A'};
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rc = zmq_send_const(sub, subscription, 2, 0);
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assert (rc == 2);
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char buffer[2];
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// Receive subscriptions from subscriber
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rc = zmq_recv(pub, buffer, 2, 0);
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assert(rc == 2);
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assert(buffer[0] == 1);
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assert(buffer[1] == 'A');
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// Subscribe socket for B instead
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rc = zmq_setsockopt(pub, ZMQ_SUBSCRIBE, "B", 1);
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assert(rc == 0);
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// Sending A message and B Message
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rc = zmq_send_const(pub, "A", 1, 0);
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assert(rc == 1);
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rc = zmq_send_const(pub, "B", 1, 0);
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assert(rc == 1);
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rc = zmq_recv(sub, buffer, 1, ZMQ_DONTWAIT);
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assert(rc == 1);
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assert(buffer[0] == 'B');
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// Clean up.
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rc = zmq_close (pub);
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assert (rc == 0);
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rc = zmq_close (sub);
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assert (rc == 0);
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rc = zmq_ctx_term (ctx);
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assert (rc == 0);
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return 0 ;
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}
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int test_unsubscribe_manual()
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{
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void *ctx = zmq_ctx_new ();
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assert (ctx);
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// Create a publisher
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void *pub = zmq_socket (ctx, ZMQ_XPUB);
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assert (pub);
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int rc = zmq_bind (pub, "inproc://soname");
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assert (rc == 0);
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// set pub socket options
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int manual = 1;
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rc = zmq_setsockopt(pub, ZMQ_XPUB_MANUAL, &manual, 4);
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assert (rc == 0);
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// Create a subscriber
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void *sub = zmq_socket (ctx, ZMQ_XSUB);
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assert (sub);
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rc = zmq_connect (sub, "inproc://soname");
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assert (rc == 0);
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// Subscribe for A
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char subscription1[2] = { 1, 'A'};
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rc = zmq_send_const(sub, subscription1, 2, 0);
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assert (rc == 2);
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// Subscribe for B
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char subscription2[2] = { 1, 'B'};
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rc = zmq_send_const(sub, subscription2, 2, 0);
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assert (rc == 2);
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char buffer[3];
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// Receive subscription "A" from subscriber
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rc = zmq_recv(pub, buffer, 2, 0);
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assert(rc == 2);
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assert(buffer[0] == 1);
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assert(buffer[1] == 'A');
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// Subscribe socket for XA instead
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rc = zmq_setsockopt(pub, ZMQ_SUBSCRIBE, "XA", 2);
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assert(rc == 0);
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// Receive subscription "B" from subscriber
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rc = zmq_recv(pub, buffer, 2, 0);
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assert(rc == 2);
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assert(buffer[0] == 1);
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assert(buffer[1] == 'B');
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// Subscribe socket for XB instead
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rc = zmq_setsockopt(pub, ZMQ_SUBSCRIBE, "XB", 2);
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assert(rc == 0);
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// Unsubscribe from A
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char unsubscription1[2] = { 0, 'A'};
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rc = zmq_send_const(sub, unsubscription1, 2, 0);
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assert (rc == 2);
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// Receive unsubscription "A" from subscriber
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rc = zmq_recv(pub, buffer, 2, 0);
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assert(rc == 2);
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assert(buffer[0] == 0);
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assert(buffer[1] == 'A');
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// Unsubscribe socket from XA instead
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rc = zmq_setsockopt(pub, ZMQ_UNSUBSCRIBE, "XA", 2);
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assert(rc == 0);
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// Sending messages XA, XB
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rc = zmq_send_const(pub, "XA", 2, 0);
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assert(rc == 2);
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rc = zmq_send_const(pub, "XB", 2, 0);
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assert(rc == 2);
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// Subscriber should receive XB only
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rc = zmq_recv(sub, buffer, 2, ZMQ_DONTWAIT);
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assert(rc == 2);
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assert(buffer[0] == 'X');
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assert(buffer[1] == 'B');
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// Close subscriber
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rc = zmq_close (sub);
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assert (rc == 0);
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// Receive unsubscription "B"
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rc = zmq_recv(pub, buffer, 2, 0);
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assert(rc == 2);
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assert(buffer[0] == 0);
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assert(buffer[1] == 'B');
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// Unsubscribe socket from XB instead
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rc = zmq_setsockopt(pub, ZMQ_UNSUBSCRIBE, "XB", 2);
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assert(rc == 0);
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// Clean up.
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rc = zmq_close (pub);
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assert (rc == 0);
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rc = zmq_ctx_term (ctx);
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assert (rc == 0);
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return 0 ;
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}
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int test_xpub_proxy_unsubscribe_on_disconnect(const char *frontend,
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const char *backend)
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{
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assert (frontend && backend);
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const char* topic = "1";
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const char* payload = "X";
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int manual = 1;
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void *ctx = zmq_ctx_new ();
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assert (ctx);
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// proxy frontend
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void *xsub_proxy = zmq_socket (ctx, ZMQ_XSUB);
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assert (xsub_proxy);
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assert (zmq_bind (xsub_proxy, frontend) == 0);
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// proxy backend
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void *xpub_proxy = zmq_socket (ctx, ZMQ_XPUB);
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assert (xpub_proxy);
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assert (zmq_setsockopt (xpub_proxy, ZMQ_XPUB_MANUAL, &manual, 4) == 0);
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assert (zmq_bind (xpub_proxy, backend) == 0);
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// publisher
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void *pub = zmq_socket (ctx, ZMQ_PUB);
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assert (zmq_connect (pub, frontend) == 0);
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// first subscriber subscribes
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void *sub1 = zmq_socket (ctx, ZMQ_SUB);
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assert (sub1);
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assert (zmq_connect (sub1, backend) == 0);
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assert (zmq_setsockopt (sub1, ZMQ_SUBSCRIBE, topic, 1) == 0);
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// wait
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msleep (SETTLE_TIME);
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// proxy reroutes and confirms subscriptions
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char sub_buff[2];
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assert (zmq_recv (xpub_proxy, sub_buff, 2, ZMQ_DONTWAIT) == 2);
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assert (sub_buff [0] == 1);
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assert (sub_buff [1] == *topic);
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assert (zmq_setsockopt (xpub_proxy, ZMQ_SUBSCRIBE, topic, 1) == 0);
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assert (zmq_send (xsub_proxy, sub_buff, 2, 0) == 2);
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// second subscriber subscribes
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void *sub2 = zmq_socket (ctx, ZMQ_SUB);
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assert (sub2);
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assert (zmq_connect (sub2, backend) == 0);
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assert (zmq_setsockopt (sub2, ZMQ_SUBSCRIBE, topic, 1) == 0);
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// wait
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msleep (SETTLE_TIME);
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// proxy reroutes
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assert (zmq_recv (xpub_proxy, sub_buff, 2, ZMQ_DONTWAIT) == 2);
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assert (sub_buff [0] == 1);
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assert (sub_buff [1] == *topic);
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assert (zmq_setsockopt (xpub_proxy, ZMQ_SUBSCRIBE, topic, 1) == 0);
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assert (zmq_send (xsub_proxy, sub_buff, 2, 0) == 2);
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// wait
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msleep (SETTLE_TIME);
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// let publisher send a msg
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assert (zmq_send (pub, topic, 1, ZMQ_SNDMORE) == 1);
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assert (zmq_send (pub, payload, 1, 0) == 1);
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// wait
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msleep (SETTLE_TIME);
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// proxy reroutes data messages to subscribers
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char topic_buff[1];
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char data_buff[1];
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assert (zmq_recv (xsub_proxy, topic_buff, 1, ZMQ_DONTWAIT) == 1);
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assert (topic_buff [0] == *topic);
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assert (zmq_recv (xsub_proxy, data_buff, 1, ZMQ_DONTWAIT) == 1);
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assert (data_buff [0] == *payload);
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assert (zmq_send (xpub_proxy, topic_buff, 1, ZMQ_SNDMORE) == 1);
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assert (zmq_send (xpub_proxy, data_buff, 1, 0) == 1);
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// wait
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msleep (SETTLE_TIME);
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// each subscriber should now get a message
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assert (zmq_recv (sub2, topic_buff, 1, ZMQ_DONTWAIT) == 1);
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assert (topic_buff [0] == *topic);
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assert (zmq_recv (sub2, data_buff, 1, ZMQ_DONTWAIT) == 1);
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assert (data_buff [0] == *payload);
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assert (zmq_recv (sub1, topic_buff, 1, ZMQ_DONTWAIT) == 1);
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assert (topic_buff [0] == *topic);
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assert (zmq_recv (sub1, data_buff, 1, ZMQ_DONTWAIT) == 1);
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assert (data_buff [0] == *payload);
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// Disconnect both subscribers
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assert (zmq_close (sub1) == 0);
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assert (zmq_close (sub2) == 0);
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// wait
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msleep (SETTLE_TIME);
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// unsubscribe messages are passed from proxy to publisher
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assert (zmq_recv (xpub_proxy, sub_buff, 2, 0) == 2);
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assert (sub_buff [0] == 0);
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assert (sub_buff [1] == *topic);
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assert (zmq_setsockopt (xpub_proxy, ZMQ_UNSUBSCRIBE, topic, 1) == 0);
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assert (zmq_send (xsub_proxy, sub_buff, 2, 0) == 2);
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// should receive another unsubscribe msg
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assert (zmq_recv (xpub_proxy, sub_buff, 2, 0) == 2
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&& "Should receive the second unsubscribe message.");
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assert (sub_buff [0] == 0);
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assert (sub_buff [1] == *topic);
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assert (zmq_setsockopt (xpub_proxy, ZMQ_UNSUBSCRIBE, topic, 1) == 0);
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assert (zmq_send (xsub_proxy, sub_buff, 2, 0) == 2);
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// wait
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msleep (SETTLE_TIME);
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// let publisher send a msg
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assert (zmq_send (pub, topic, 1, ZMQ_SNDMORE) == 1);
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assert (zmq_send (pub, payload, 1, 0) == 1);
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// wait
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msleep (SETTLE_TIME);
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// nothing should come to the proxy
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assert (zmq_recv (xsub_proxy, topic_buff, 1, ZMQ_DONTWAIT) == -1);
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assert (errno == EAGAIN);
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assert (zmq_close (pub) == 0);
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assert (zmq_close (xpub_proxy) == 0);
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assert (zmq_close (xsub_proxy) == 0);
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assert (zmq_ctx_term (ctx) == 0);
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return 0;
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}
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int test_missing_subscriptions(const char *frontend, const char *backend)
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{
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assert (frontend && backend);
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const char* topic1 = "1";
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const char* topic2 = "2";
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const char* payload = "X";
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int manual = 1;
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void *ctx = zmq_ctx_new ();
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assert (ctx);
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// proxy frontend
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void *xsub_proxy = zmq_socket (ctx, ZMQ_XSUB);
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assert (xsub_proxy);
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assert (zmq_bind (xsub_proxy, frontend) == 0);
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// proxy backend
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void *xpub_proxy = zmq_socket (ctx, ZMQ_XPUB);
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assert (xpub_proxy);
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assert (zmq_setsockopt (xpub_proxy, ZMQ_XPUB_MANUAL, &manual, 4) == 0);
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assert (zmq_bind (xpub_proxy, backend) == 0);
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// publisher
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void *pub = zmq_socket (ctx, ZMQ_PUB);
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assert (zmq_connect (pub, frontend) == 0);
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// Here's the problem: because subscribers subscribe in quick succession,
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// the proxy is unable to confirm the first subscription before receiving
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// the second. This causes the first subscription to get lost.
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// first subscriber
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void *sub1 = zmq_socket (ctx, ZMQ_SUB);
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assert (sub1);
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assert (zmq_connect (sub1, backend) == 0);
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assert (zmq_setsockopt (sub1, ZMQ_SUBSCRIBE, topic1, 1) == 0);
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// second subscriber
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void *sub2 = zmq_socket (ctx, ZMQ_SUB);
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assert (sub2);
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assert (zmq_connect (sub2, backend) == 0);
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assert (zmq_setsockopt (sub2, ZMQ_SUBSCRIBE, topic2, 1) == 0);
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// wait
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msleep (SETTLE_TIME);
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// proxy now reroutes and confirms subscriptions
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char buffer[2];
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assert (zmq_recv (xpub_proxy, buffer, 2, ZMQ_DONTWAIT) == 2);
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assert (buffer [0] == 1);
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assert (buffer [1] == *topic1);
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assert (zmq_setsockopt (xpub_proxy, ZMQ_SUBSCRIBE, topic1, 1) == 0);
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assert (zmq_send (xsub_proxy, buffer, 2, 0) == 2);
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assert (zmq_recv (xpub_proxy, buffer, 2, ZMQ_DONTWAIT) == 2);
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assert (buffer [0] == 1);
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assert (buffer [1] == *topic2);
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assert (zmq_setsockopt (xpub_proxy, ZMQ_SUBSCRIBE, topic2, 1) == 0);
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assert (zmq_send (xsub_proxy, buffer, 2, 0) == 2);
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// wait
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msleep (SETTLE_TIME);
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// let publisher send 2 msgs, each with its own topic
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assert (zmq_send (pub, topic1, 1, ZMQ_SNDMORE) == 1);
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assert (zmq_send (pub, payload, 1, 0) == 1);
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assert (zmq_send (pub, topic2, 1, ZMQ_SNDMORE) == 1);
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assert (zmq_send (pub, payload, 1, 0) == 1);
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// wait
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msleep (SETTLE_TIME);
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// proxy reroutes data messages to subscribers
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char topic_buff [1];
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char data_buff [1];
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assert (zmq_recv (xsub_proxy, topic_buff, 1, ZMQ_DONTWAIT) == 1);
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assert (topic_buff [0] == *topic1);
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assert (zmq_recv (xsub_proxy, data_buff, 1, ZMQ_DONTWAIT) == 1);
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assert (data_buff [0] == *payload);
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assert (zmq_send (xpub_proxy, topic_buff, 1, ZMQ_SNDMORE) == 1);
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assert (zmq_send (xpub_proxy, data_buff, 1, 0) == 1);
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assert (zmq_recv (xsub_proxy, topic_buff, 1, ZMQ_DONTWAIT) == 1);
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assert (topic_buff [0] == *topic2);
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assert (zmq_recv (xsub_proxy, data_buff, 1, ZMQ_DONTWAIT) == 1);
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assert (data_buff [0] == *payload);
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assert (zmq_send (xpub_proxy, topic_buff, 1, ZMQ_SNDMORE) == 1);
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assert (zmq_send (xpub_proxy, data_buff, 1, 0) == 1);
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// wait
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msleep (SETTLE_TIME);
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// each subscriber should now get a message
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assert (zmq_recv (sub2, topic_buff, 1, ZMQ_DONTWAIT) == 1);
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assert (topic_buff [0] == *topic2);
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assert (zmq_recv (sub2, data_buff, 1, ZMQ_DONTWAIT) == 1);
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assert (data_buff [0] == *payload);
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assert (zmq_recv (sub1, topic_buff, 1, ZMQ_DONTWAIT) == 1);
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assert (topic_buff [0] == *topic1);
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assert (zmq_recv (sub1, data_buff, 1, ZMQ_DONTWAIT) == 1);
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assert (data_buff [0] == *payload);
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// Clean up
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assert (zmq_close (sub1) == 0);
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assert (zmq_close (sub2) == 0);
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assert (zmq_close (pub) == 0);
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assert (zmq_close (xpub_proxy) == 0);
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assert (zmq_close (xsub_proxy) == 0);
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assert (zmq_ctx_term (ctx) == 0);
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return 0;
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}
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int main(void)
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{
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setup_test_environment ();
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test_basic ();
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test_unsubscribe_manual ();
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const char *frontend;
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const char *backend;
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#if !defined ZMQ_HAVE_WINDOWS && !defined ZMQ_HAVE_OPENVMS
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frontend = "ipc://frontend";
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backend = "ipc://backend";
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test_xpub_proxy_unsubscribe_on_disconnect (frontend, backend);
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test_missing_subscriptions (frontend, backend);
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#endif
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frontend = "tcp://127.0.0.1:5560";
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backend = "tcp://127.0.0.1:5561";
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test_xpub_proxy_unsubscribe_on_disconnect (frontend, backend);
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test_missing_subscriptions (frontend, backend);
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return 0;
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}
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