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libzmq/tests/test_disconnect_msg.cpp
Doron Somech 81444136d5 problem: router doesn't know when peer disconnected
ZMQ_ROUTER_NOTIFY doesn't have a context and doesn't play nice with protocols. with ZMQ_DISCONNECT_MSG we can set it to a protocol message, like DISCONNECT in majordomo. Router will send it when a peer is disconnected. Another advantage of ZMQ_DISCONNECT_MSG is that it also works on inproc.

Together with ZMQ_HEARTBEAT it allows to build very reliable protocols, and much simpler as well.
2020-04-17 18:04:28 +03:00

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3.5 KiB
C++

/*
Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
This file is part of libzmq, the ZeroMQ core engine in C++.
libzmq is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
As a special exception, the Contributors give you permission to link
this library with independent modules to produce an executable,
regardless of the license terms of these independent modules, and to
copy and distribute the resulting executable under terms of your choice,
provided that you also meet, for each linked independent module, the
terms and conditions of the license of that module. An independent
module is a module which is not derived from or based on this library.
If you modify this library, you must extend this exception to your
version of the library.
libzmq 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 "testutil.hpp"
#include "testutil_unity.hpp"
SETUP_TEARDOWN_TESTCONTEXT
void test (const char *address)
{
// Create a server
void *server = test_context_socket (ZMQ_SERVER);
// set server socket options
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (server, ZMQ_DISCONNECT_MSG, "D", 1));
// bind server
TEST_ASSERT_SUCCESS_ERRNO (zmq_bind (server, address));
// Create a client
void *client = test_context_socket (ZMQ_CLIENT);
TEST_ASSERT_SUCCESS_ERRNO (zmq_setsockopt (client, ZMQ_HELLO_MSG, "H", 1));
TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (client, address));
// Receive the hello message from client
recv_string_expect_success (server, "H", 0);
// Kill the client
test_context_socket_close (client);
// Receive the disconnect message
recv_string_expect_success (server, "D", 0);
// Clean up.
test_context_socket_close (server);
}
void test_tcp ()
{
test ("tcp://127.0.0.1:5569");
}
void test_inproc ()
{
test ("inproc://disconnect-msg");
}
void test_inproc_disconnect ()
{
const char *address = "inproc://disconnect-msg";
// Create a server
void *server = test_context_socket (ZMQ_SERVER);
// set server socket options
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (server, ZMQ_DISCONNECT_MSG, "D", 1));
// bind server
TEST_ASSERT_SUCCESS_ERRNO (zmq_bind (server, address));
// Create a client
void *client = test_context_socket (ZMQ_CLIENT);
TEST_ASSERT_SUCCESS_ERRNO (zmq_setsockopt (client, ZMQ_HELLO_MSG, "H", 1));
TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (client, address));
// Receive the hello message from client
recv_string_expect_success (server, "H", 0);
// disconnect the client
TEST_ASSERT_SUCCESS_ERRNO (zmq_disconnect (client, address));
// Receive the disconnect message
recv_string_expect_success (server, "D", 0);
// Clean up.
test_context_socket_close (client);
test_context_socket_close (server);
}
int main ()
{
setup_test_environment ();
UNITY_BEGIN ();
RUN_TEST (test_tcp);
RUN_TEST (test_inproc);
RUN_TEST (test_inproc_disconnect);
return UNITY_END ();
}