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Backported test_connect_delay.cpp from libzmq
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@hintjens
hintjens committed May 21, 2013
1 parent 37a0ec5 commit 3d353f8
Showing 1 changed file with 87 additions and 109 deletions.
196 changes: 87 additions & 109 deletions tests/test_connect_delay.cpp
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@@ -1,25 +1,23 @@
/*
Copyright (c) 2012 Ian Barber
Copyright (c) 2012 Other contributors as noted in the AUTHORS file
This file is part of 0MQ.
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 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.
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/>.
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 "../include/zmq_utils.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
Expand All @@ -31,12 +29,9 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.

int main (void)
{
fprintf (stderr, "test_connect_delay running...\n");
int val;
int rc;
char buffer[16];
int seen = 0;

// TEST 1.
// First we're going to attempt to send messages to two
// pipes, one connected, the other not. We should see
Expand All @@ -53,7 +48,7 @@ int main (void)
val = 0;
rc = zmq_setsockopt(to, ZMQ_LINGER, &val, sizeof(val));
assert (rc == 0);
rc = zmq_bind(to, "tcp://*:5555");
rc = zmq_bind (to, "tcp://*:6555");
assert (rc == 0);

// Create a socket pushing to two endpoints - only 1 message should arrive.
Expand All @@ -71,26 +66,22 @@ int main (void)

// We send 10 messages, 5 should just get stuck in the queue
// for the not-yet-connected pipe
for (int i = 0; i < 10; ++i)
{
std::string message("message ");
message += ('0' + i);
rc = zmq_send (from, message.data(), message.size(), 0);
assert(rc >= 0);
for (int i = 0; i < 10; ++i) {
rc = zmq_send (from, "Hello", 5, 0);
assert (rc == 5);
}

// Sleep to allow the messages to be delivered
zmq_sleep (1);

// We now consume from the connected pipe
// - we should see just 5
seen = 0;
for (int i = 0; i < 10; ++i)
{
memset (&buffer, 0, sizeof(buffer));
rc = zmq_recv (to, &buffer, sizeof(buffer), ZMQ_DONTWAIT);
if( rc == -1)
break;
int timeout = 100;
rc = zmq_setsockopt (to, ZMQ_RCVTIMEO, &timeout, sizeof (int));
assert (rc == 0);

int seen = 0;
while (true) {
rc = zmq_recv (to, &buffer, sizeof (buffer), 0);
if (rc == -1)
break; // Break when we didn't get a message
seen++;
}
assert (seen == 5);
Expand All @@ -101,7 +92,7 @@ int main (void)
rc = zmq_close (to);
assert (rc == 0);

rc = zmq_ctx_destroy(context);
rc = zmq_term (context);
assert (rc == 0);

// TEST 2
Expand Down Expand Up @@ -144,116 +135,103 @@ int main (void)
assert (rc == 0);

// Send 10 messages, all should be routed to the connected pipe
for (int i = 0; i < 10; ++i)
{
std::string message("message ");
message += ('0' + i);
rc = zmq_send (from, message.data(), message.size(), 0);
assert (rc >= 0);
for (int i = 0; i < 10; ++i) {
rc = zmq_send (from, "Hello", 5, 0);
assert (rc == 5);
}

// Sleep to allow the messages to be delivered
zmq_sleep (1);

// Send 10 messages, all should arrive.
rc = zmq_setsockopt (to, ZMQ_RCVTIMEO, &timeout, sizeof (int));
assert (rc == 0);

seen = 0;
for (int i = 0; i < 10; ++i)
{
memset(&buffer, 0, sizeof(buffer));
rc = zmq_recv (to, &buffer, sizeof(buffer), ZMQ_DONTWAIT);
// If there is a failed delivery, assert!
assert (rc != -1);
while (true) {
rc = zmq_recv (to, &buffer, sizeof (buffer), 0);
if (rc == -1)
break; // Break when we didn't get a message
seen++;
}
assert (seen == 10);

rc = zmq_close (from);
assert (rc == 0);

rc = zmq_close (to);
assert (rc == 0);

rc = zmq_ctx_destroy(context);
rc = zmq_term (context);
assert (rc == 0);

// TEST 3
// This time we want to validate that the same blocking behaviour
// occurs with an existing connection that is broken. We will send
// messaages to a connected pipe, disconnect and verify the messages
// messages to a connected pipe, disconnect and verify the messages
// block. Then we reconnect and verify messages flow again.
context = zmq_ctx_new();
void *context2 = zmq_ctx_new();
context = zmq_ctx_new ();

to = zmq_socket (context2, ZMQ_PULL);
assert (to);
rc = zmq_bind (to, "tcp://*:5560");
void *backend = zmq_socket (context, ZMQ_DEALER);
assert (backend);
void *frontend = zmq_socket (context, ZMQ_DEALER);
assert (frontend);
int zero = 0;
rc = zmq_setsockopt (backend, ZMQ_LINGER, &zero, sizeof (zero));
assert (rc == 0);

val = 0;
rc = zmq_setsockopt (to, ZMQ_LINGER, &val, sizeof(val));
rc = zmq_setsockopt (frontend, ZMQ_LINGER, &zero, sizeof (zero));
assert (rc == 0);

// Create a socket pushing
from = zmq_socket (context, ZMQ_PUSH);
assert (from);

val = 0;
rc = zmq_setsockopt (from, ZMQ_LINGER, &val, sizeof(val));
// Frontend connects to backend using DELAY_ATTACH_ON_CONNECT
int on = 1;
rc = zmq_setsockopt (frontend, ZMQ_DELAY_ATTACH_ON_CONNECT, &on, sizeof (on));
assert (rc == 0);
val = 1;
rc = zmq_setsockopt (from, ZMQ_DELAY_ATTACH_ON_CONNECT, &val, sizeof(val));
rc = zmq_bind (backend, "tcp://*:5560");
assert (rc == 0);

// Connect to the valid socket socket
rc = zmq_connect (from, "tcp://localhost:5560");
rc = zmq_connect (frontend, "tcp://localhost:5560");
assert (rc == 0);

// Ping backend to frontend so we know when the connection is up
rc = zmq_send (backend, "Hello", 5, 0);
assert (rc == 5);
rc = zmq_recv (frontend, buffer, 255, 0);
assert (rc == 5);

// Allow connections to stabilise
zmq_sleep(1);

// Send a message, should succeed
std::string message("message ");
rc = zmq_send (from, message.data(), message.size(), 0);
assert (rc >= 0);
// Send message from frontend to backend
rc = zmq_send (frontend, "Hello", 5, ZMQ_DONTWAIT);
assert (rc == 5);

rc = zmq_close (to);
rc = zmq_close (backend);
assert (rc == 0);

rc = zmq_ctx_destroy(context2);
assert (rc == 0);

// Give time to process disconnect
zmq_sleep(1);
// Give time to process disconnect
// There's no way to do this except with a sleep
struct timespec t = { 0, 250 * 1000000 };
nanosleep (&t, NULL);

// Send a message, should fail
rc = zmq_send (from, message.data(), message.size(), ZMQ_DONTWAIT);
rc = zmq_send (frontend, "Hello", 5, ZMQ_DONTWAIT);
assert (rc == -1);

context2 = zmq_ctx_new();
to = zmq_socket (context2, ZMQ_PULL);
assert (to);
rc = zmq_bind (to, "tcp://*:5560");
assert (rc == 0);

val = 0;
rc = zmq_setsockopt (to, ZMQ_LINGER, &val, sizeof(val));
// Recreate backend socket
backend = zmq_socket (context, ZMQ_DEALER);
assert (backend);
rc = zmq_setsockopt (backend, ZMQ_LINGER, &zero, sizeof (zero));
assert (rc == 0);

// Allow connections to stabilise
zmq_sleep(1);

rc = zmq_bind (backend, "tcp://*:5560");
assert (rc == 0);

// Ping backend to frontend so we know when the connection is up
rc = zmq_send (backend, "Hello", 5, 0);
assert (rc == 5);
rc = zmq_recv (frontend, buffer, 255, 0);
assert (rc == 5);

// After the reconnect, should succeed
rc = zmq_send (from, message.data(), message.size(), 0);
assert (rc >= 0);
rc = zmq_send (frontend, "Hello", 5, ZMQ_DONTWAIT);
assert (rc == 5);

rc = zmq_close (to);
rc = zmq_close (backend);
assert (rc == 0);

rc = zmq_close (from);
rc = zmq_close (frontend);
assert (rc == 0);

rc = zmq_ctx_destroy(context);
assert (rc == 0);

rc = zmq_ctx_destroy(context2);
rc = zmq_term (context);
assert (rc == 0);
}

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