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//
// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
// Copyright 2018 Capitar IT Group BV <info@capitar.com>
//
// This software is supplied under the terms of the MIT License, a
// copy of which should be located in the distribution where this
// file was obtained (LICENSE.txt). A copy of the license may also be
// found online at https://opensource.org/licenses/MIT.
//
#include "convey.h"
#include "nng.h"
#include "protocol/pipeline0/pull.h"
#include "protocol/pipeline0/push.h"
#include "stubs.h"
#include "supplemental/util/platform.h"
#include <string.h>
#define APPENDSTR(m, s) nng_msg_append(m, s, strlen(s))
#define CHECKSTR(m, s) \
So(nng_msg_len(m) == strlen(s)); \
So(memcmp(nng_msg_body(m), s, strlen(s)) == 0)
#define MILLISECOND(x) (x)
TestMain("PIPELINE (PUSH/PULL) pattern", {
atexit(nng_fini);
const char *addr = "inproc://test";
Convey("We can create a PUSH socket", {
nng_socket push;
So(nng_push_open(&push) == 0);
Reset({ nng_close(push); });
Convey("Recv fails", {
nng_msg *msg;
So(nng_recvmsg(push, &msg, 0) == NNG_ENOTSUP);
});
});
Convey("We can create a PULL socket", {
nng_socket pull;
So(nng_pull_open(&pull) == 0);
Reset({ nng_close(pull); });
Convey("Send fails", {
nng_msg *msg;
So(nng_msg_alloc(&msg, 0) == 0);
So(nng_sendmsg(pull, msg, 0) == NNG_ENOTSUP);
nng_msg_free(msg);
});
});
Convey("We can create a linked PUSH/PULL pair", {
nng_socket push;
nng_socket pull;
nng_socket what;
So(nng_push_open(&push) == 0);
So(nng_pull_open(&pull) == 0);
So(nng_push_open(&what) == 0);
Reset({
nng_close(push);
nng_close(pull);
nng_close(what);
});
// Its important to avoid a startup race that the
// sender be the dialer. Otherwise you need a delay
// since the server accept is really asynchronous.
So(nng_listen(pull, addr, NULL, 0) == 0);
So(nng_dial(push, addr, NULL, 0) == 0);
So(nng_dial(what, addr, NULL, 0) == 0);
So(nng_close(what) == 0);
nng_msleep(20);
Convey("Push can send messages, and pull can recv", {
nng_msg *msg;
So(nng_msg_alloc(&msg, 0) == 0);
APPENDSTR(msg, "hello");
So(nng_sendmsg(push, msg, 0) == 0);
msg = NULL;
So(nng_recvmsg(pull, &msg, 0) == 0);
So(msg != NULL);
CHECKSTR(msg, "hello");
nng_msg_free(msg);
});
});
Convey("Load balancing", {
nng_msg * abc;
nng_msg * def;
nng_duration msecs;
nng_socket push;
nng_socket pull1;
nng_socket pull2;
nng_socket pull3;
So(nng_push_open(&push) == 0);
So(nng_pull_open(&pull1) == 0);
So(nng_pull_open(&pull2) == 0);
So(nng_pull_open(&pull3) == 0);
Reset({
nng_close(push);
nng_close(pull1);
nng_close(pull2);
nng_close(pull3);
});
// We need to increase the buffer from zero, because
// there is no guarantee that the various listeners
// will be present, which means that they will push
// back during load balancing. Adding a small buffer
// ensures that we can write to each stream, even if
// the listeners are not running yet.
So(nng_setopt_int(push, NNG_OPT_RECVBUF, 4) == 0);
So(nng_setopt_int(push, NNG_OPT_SENDBUF, 4) == 0);
So(nng_setopt_int(pull1, NNG_OPT_RECVBUF, 4) == 0);
So(nng_setopt_int(pull1, NNG_OPT_SENDBUF, 4) == 0);
So(nng_setopt_int(pull2, NNG_OPT_RECVBUF, 4) == 0);
So(nng_setopt_int(pull2, NNG_OPT_SENDBUF, 4) == 0);
So(nng_setopt_int(pull3, NNG_OPT_RECVBUF, 4) == 0);
So(nng_setopt_int(pull3, NNG_OPT_SENDBUF, 4) == 0);
So(nng_msg_alloc(&abc, 0) == 0);
APPENDSTR(abc, "abc");
So(nng_msg_alloc(&def, 0) == 0);
APPENDSTR(def, "def");
msecs = MILLISECOND(100);
So(nng_setopt_ms(pull1, NNG_OPT_RECVTIMEO, msecs) == 0);
So(nng_setopt_ms(pull2, NNG_OPT_RECVTIMEO, msecs) == 0);
So(nng_setopt_ms(pull3, NNG_OPT_RECVTIMEO, msecs) == 0);
So(nng_listen(push, addr, NULL, 0) == 0);
So(nng_dial(pull1, addr, NULL, 0) == 0);
So(nng_dial(pull2, addr, NULL, 0) == 0);
So(nng_dial(pull3, addr, NULL, 0) == 0);
So(nng_close(pull3) == 0);
// So pull3 might not be done accepting yet, but pull1
// and pull2 definitely are, because otherwise the
// server couldn't have gotten to the accept. (The
// accept logic is single threaded.) Let's wait a bit
// though, to ensure that stuff has settled.
nng_msleep(100);
So(nng_sendmsg(push, abc, 0) == 0);
So(nng_sendmsg(push, def, 0) == 0);
abc = NULL;
def = NULL;
So(nng_recvmsg(pull1, &abc, 0) == 0);
CHECKSTR(abc, "abc");
So(nng_recvmsg(pull2, &def, 0) == 0);
CHECKSTR(def, "def");
nng_msg_free(abc);
nng_msg_free(def);
So(nng_recvmsg(pull1, &abc, 0) == NNG_ETIMEDOUT);
So(nng_recvmsg(pull2, &abc, 0) == NNG_ETIMEDOUT);
});
})
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