torque 79a45fd2e3
git subrepo clone (merge) --branch=v3.6.1 https://github.com/nats-io/nats.c.git deps/nats.c
subrepo:
  subdir:   "deps/nats.c"
  merged:   "66cec7f"
upstream:
  origin:   "https://github.com/nats-io/nats.c.git"
  branch:   "v3.6.1"
  commit:   "66cec7f"
git-subrepo:
  version:  "0.4.6"
  commit:   "b8b46501e"
2023-08-15 00:21:33 -07:00

65 lines
2.0 KiB
C

// Copyright 2017-2018 The NATS Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <nats.h>
int main(int argc, char **argv)
{
natsConnection *conn = NULL;
natsSubscription *sub = NULL;
natsMsg *msg = NULL;
natsStatus s;
printf("Listening on subject 'foo'\n");
// Creates a connection to the default NATS URL
s = natsConnection_ConnectTo(&conn, NATS_DEFAULT_URL);
if (s == NATS_OK)
{
// Creates an synchronous subscription on subject "foo".
s = natsConnection_SubscribeSync(&sub, conn, "foo");
}
if (s == NATS_OK)
{
// With synchronous subscriptions, one need to poll
// using this function. A timeout is used to instruct
// how long we are willing to wait. The wait is in milliseconds.
// So here, we are going to wait for 5 seconds.
s = natsSubscription_NextMsg(&msg, sub, 5000);
}
if (s == NATS_OK)
{
// If we are here, we should have received a message.
printf("Received msg: %s - %.*s\n",
natsMsg_GetSubject(msg),
natsMsg_GetDataLength(msg),
natsMsg_GetData(msg));
// Need to destroy the message!
natsMsg_Destroy(msg);
}
// Anything that is created need to be destroyed
natsSubscription_Destroy(sub);
natsConnection_Destroy(conn);
// If there was an error, print a stack trace and exit
if (s != NATS_OK)
{
nats_PrintLastErrorStack(stderr);
exit(2);
}
return 0;
}