libzmq/tests/test_hwm_pubsub.cpp

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/*
Copyright (c) 2007-2017 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"
// NOTE: on OSX the endpoint returned by ZMQ_LAST_ENDPOINT may be quite long,
// ensure we have extra space for that:
#define SOCKET_STRING_LEN (MAX_SOCKET_STRING * 4)
void setUp ()
{
setup_test_context ();
}
void tearDown ()
{
teardown_test_context ();
}
int test_defaults (int send_hwm_, int msg_cnt_, const char *endpoint)
{
char pub_endpoint[SOCKET_STRING_LEN];
// Set up and bind XPUB socket
void *pub_socket = test_context_socket (ZMQ_XPUB);
test_bind (pub_socket, endpoint, pub_endpoint, sizeof pub_endpoint);
// Set up and connect SUB socket
void *sub_socket = test_context_socket (ZMQ_SUB);
TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (sub_socket, pub_endpoint));
//set a hwm on publisher
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (pub_socket, ZMQ_SNDHWM, &send_hwm_, sizeof (send_hwm_)));
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (sub_socket, ZMQ_SUBSCRIBE, 0, 0));
// Wait before starting TX operations till 1 subscriber has subscribed
// (in this test there's 1 subscriber only)
const char subscription_to_all_topics[] = {1, 0};
recv_string_expect_success (pub_socket, subscription_to_all_topics, 0);
// Send until we reach "mute" state
int send_count = 0;
while (send_count < msg_cnt_
&& zmq_send (pub_socket, "test message", 13, ZMQ_DONTWAIT) == 13)
++send_count;
TEST_ASSERT_EQUAL_INT (send_hwm_, send_count);
msleep (SETTLE_TIME);
// Now receive all sent messages
int recv_count = 0;
char dummybuff[64];
while (13 == zmq_recv (sub_socket, &dummybuff, 64, ZMQ_DONTWAIT)) {
++recv_count;
}
TEST_ASSERT_EQUAL_INT (send_hwm_, recv_count);
// Clean up
test_context_socket_close (sub_socket);
test_context_socket_close (pub_socket);
return recv_count;
}
int receive (void *socket_, int *is_termination)
{
int recv_count = 0;
*is_termination = 0;
// Now receive all sent messages
char buffer[255];
int len;
while ((len = zmq_recv (socket_, buffer, sizeof (buffer), 0)) >= 0) {
++recv_count;
if (len == 3 && strncmp (buffer, "end", len) == 0) {
*is_termination = 1;
return recv_count;
}
}
return recv_count;
}
int test_blocking (int send_hwm_, int msg_cnt_, const char *endpoint)
{
char pub_endpoint[SOCKET_STRING_LEN];
// Set up bind socket
void *pub_socket = test_context_socket (ZMQ_XPUB);
test_bind (pub_socket, endpoint, pub_endpoint, sizeof pub_endpoint);
// Set up connect socket
void *sub_socket = test_context_socket (ZMQ_SUB);
TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (sub_socket, pub_endpoint));
//set a hwm on publisher
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (pub_socket, ZMQ_SNDHWM, &send_hwm_, sizeof (send_hwm_)));
int wait = 1;
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (pub_socket, ZMQ_XPUB_NODROP, &wait, sizeof (wait)));
int timeout_ms = 10;
TEST_ASSERT_SUCCESS_ERRNO (zmq_setsockopt (
sub_socket, ZMQ_RCVTIMEO, &timeout_ms, sizeof (timeout_ms)));
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (sub_socket, ZMQ_SUBSCRIBE, 0, 0));
// Wait before starting TX operations till 1 subscriber has subscribed
// (in this test there's 1 subscriber only)
const char subscription_to_all_topics[] = {1, 0};
recv_string_expect_success (pub_socket, subscription_to_all_topics, 0);
// Send until we block
int send_count = 0;
int recv_count = 0;
int blocked_count = 0;
int is_termination = 0;
while (send_count < msg_cnt_) {
const int rc = zmq_send (pub_socket, NULL, 0, ZMQ_DONTWAIT);
if (rc == 0) {
++send_count;
} else if (-1 == rc) {
// if the PUB socket blocks due to HWM, errno should be EAGAIN:
blocked_count++;
TEST_ASSERT_EQUAL_INT (EAGAIN, errno);
recv_count += receive (sub_socket, &is_termination);
}
}
// if send_hwm_ < msg_cnt_, we should block at least once:
TEST_ASSERT (blocked_count > 0);
// dequeue SUB socket again, to make sure XPUB has space to send the termination message
recv_count += receive (sub_socket, &is_termination);
// send termination message
send_string_expect_success (pub_socket, "end", 0);
// now block on the SUB side till we get the termination message
while (is_termination == 0)
recv_count += receive (sub_socket, &is_termination);
// remove termination message from the count:
recv_count--;
TEST_ASSERT_EQUAL_INT (send_count, recv_count);
// Clean up
test_context_socket_close (sub_socket);
test_context_socket_close (pub_socket);
return recv_count;
}
// hwm should apply to the messages that have already been received
// with hwm 11024: send 9999 msg, receive 9999, send 1100, receive 1100
void test_reset_hwm ()
{
const int first_count = 9999;
const int second_count = 1100;
int hwm = 11024;
char my_endpoint[SOCKET_STRING_LEN];
// Set up bind socket
void *pub_socket = test_context_socket (ZMQ_PUB);
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (pub_socket, ZMQ_SNDHWM, &hwm, sizeof (hwm)));
bind_loopback_ipv4 (pub_socket, my_endpoint, MAX_SOCKET_STRING);
// Set up connect socket
void *sub_socket = test_context_socket (ZMQ_SUB);
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (sub_socket, ZMQ_RCVHWM, &hwm, sizeof (hwm)));
TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (sub_socket, my_endpoint));
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (sub_socket, ZMQ_SUBSCRIBE, 0, 0));
msleep (SETTLE_TIME);
// Send messages
int send_count = 0;
while (send_count < first_count
&& zmq_send (pub_socket, NULL, 0, ZMQ_DONTWAIT) == 0)
++send_count;
TEST_ASSERT_EQUAL_INT (first_count, send_count);
msleep (SETTLE_TIME);
// Now receive all sent messages
int recv_count = 0;
while (0 == zmq_recv (sub_socket, NULL, 0, ZMQ_DONTWAIT)) {
++recv_count;
}
TEST_ASSERT_EQUAL_INT (first_count, recv_count);
msleep (SETTLE_TIME);
// Send messages
send_count = 0;
while (send_count < second_count
&& zmq_send (pub_socket, NULL, 0, ZMQ_DONTWAIT) == 0)
++send_count;
TEST_ASSERT_EQUAL_INT (second_count, send_count);
msleep (SETTLE_TIME);
// Now receive all sent messages
recv_count = 0;
while (0 == zmq_recv (sub_socket, NULL, 0, ZMQ_DONTWAIT)) {
++recv_count;
}
TEST_ASSERT_EQUAL_INT (second_count, recv_count);
// Clean up
test_context_socket_close (sub_socket);
test_context_socket_close (pub_socket);
}
void test_tcp ()
{
// send 1000 msg on hwm 1000, receive 1000, on TCP transport
TEST_ASSERT_EQUAL_INT (1000,
test_defaults (1000, 1000, "tcp://127.0.0.1:*"));
// send 100 msg on hwm 100, receive 100
TEST_ASSERT_EQUAL_INT (100, test_defaults (100, 100, "tcp://127.0.0.1:*"));
// send 6000 msg on hwm 2000, drops above hwm, only receive hwm:
TEST_ASSERT_EQUAL_INT (6000,
test_blocking (2000, 6000, "tcp://127.0.0.1:*"));
}
void test_inproc ()
{
TEST_ASSERT_EQUAL_INT (1000, test_defaults (1000, 1000, "inproc://a"));
TEST_ASSERT_EQUAL_INT (100, test_defaults (100, 100, "inproc://b"));
TEST_ASSERT_EQUAL_INT (6000, test_blocking (2000, 6000, "inproc://c"));
}
#if !defined(ZMQ_HAVE_WINDOWS) && !defined(ZMQ_HAVE_GNU)
void test_ipc ()
{
TEST_ASSERT_EQUAL_INT (1000, test_defaults (1000, 1000, "ipc://*"));
TEST_ASSERT_EQUAL_INT (100, test_defaults (100, 100, "ipc://*"));
TEST_ASSERT_EQUAL_INT (6000, test_blocking (2000, 6000, "ipc://*"));
}
#endif
int main ()
{
setup_test_environment ();
UNITY_BEGIN ();
// repeat the test for both TCP, INPROC and IPC transports:
RUN_TEST (test_tcp);
RUN_TEST (test_inproc);
#if !defined(ZMQ_HAVE_WINDOWS) && !defined(ZMQ_HAVE_GNU)
RUN_TEST (test_ipc);
#endif
RUN_TEST (test_reset_hwm);
return UNITY_END ();
}