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//
// Copyright 2017 Garrett D'Amore <garrett@damore.org>
//
// 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 <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)
Main({
int rv;
const char *addr = "inproc://test";
Test("PIPELINE (PUSH/PULL) pattern", {
Convey("We can create a PUSH socket", {
nng_socket *push;
So(nng_open(&push, NNG_PROTO_PUSH) == 0);
So(push != NULL);
Reset({
nng_close(push);
})
Convey("Protocols match", {
So(nng_protocol(push) == NNG_PROTO_PUSH);
So(nng_peer(push) == NNG_PROTO_PULL);
})
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_open(&pull, NNG_PROTO_PULL) == 0);
So(pull != NULL);
Reset({
nng_close(pull);
})
Convey("Protocols match", {
So(nng_protocol(pull) == NNG_PROTO_PULL);
So(nng_peer(pull) == NNG_PROTO_PUSH);
})
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_open(&push, NNG_PROTO_PUSH) == 0);
So(nng_open(&pull, NNG_PROTO_PULL) == 0);
So(nng_open(&what, NNG_PROTO_PUSH) == 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, NNG_FLAG_SYNCH) == 0);
So(nng_dial(push, addr, NULL, NNG_FLAG_SYNCH) == 0);
So(nng_dial(what, addr, NULL, NNG_FLAG_SYNCH) == 0);
So(nng_shutdown(what) == 0);
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;
uint64_t usecs;
nng_socket *push;
nng_socket *pull1;
nng_socket *pull2;
nng_socket *pull3;
So(nng_open(&push, NNG_PROTO_PUSH) == 0);
So(nng_open(&pull1, NNG_PROTO_PULL) == 0);
So(nng_open(&pull2, NNG_PROTO_PULL) == 0);
So(nng_open(&pull3, NNG_PROTO_PULL) == 0);
Reset({
nng_close(push);
nng_close(pull1);
nng_close(pull2);
nng_close(pull3);
})
So(nng_msg_alloc(&abc, 0) == 0);
APPENDSTR(abc, "abc");
So(nng_msg_alloc(&def, 0) == 0);
APPENDSTR(def, "def");
usecs = 100000;
So(nng_setopt(pull1, NNG_OPT_RCVTIMEO, &usecs, sizeof (usecs)) == 0);
So(nng_setopt(pull2, NNG_OPT_RCVTIMEO, &usecs, sizeof (usecs)) == 0);
So(nng_setopt(pull3, NNG_OPT_RCVTIMEO, &usecs, sizeof (usecs)) == 0);
So(nng_listen(push, addr, NULL, NNG_FLAG_SYNCH) == 0);
So(nng_dial(pull1, addr, NULL, NNG_FLAG_SYNCH) == 0);
So(nng_dial(pull2, addr, NULL, NNG_FLAG_SYNCH) == 0);
So(nng_dial(pull3, addr, NULL, NNG_FLAG_SYNCH) == 0);
So(nng_shutdown(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.)
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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