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git subrepo clone (merge) --branch=v3.6.1 https://github.com/nats-io/nats.c.git deps/nats.c

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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"
This commit is contained in:
torque
2023-08-15 00:19:51 -07:00
parent 5bc936a09f
commit 79a45fd2e3
558 changed files with 151795 additions and 0 deletions
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201
deps/nats.c/examples/js-pub.c vendored Normal file
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// Copyright 2021 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 "examples.h"
static const char *usage = ""\
"-stream stream name (default is 'foo')\n" \
"-txt text to send (default is 'hello')\n" \
"-count number of messages to send\n" \
"-sync publish synchronously (default is async)\n";
static void
_jsPubErr(jsCtx *js, jsPubAckErr *pae, void *closure)
{
int *errors = (int*) closure;
printf("Error: %u - Code: %u - Text: %s\n", pae->Err, pae->ErrCode, pae->ErrText);
printf("Original message: %.*s\n", natsMsg_GetDataLength(pae->Msg), natsMsg_GetData(pae->Msg));
*errors = (*errors + 1);
// If we wanted to resend the original message, we would do something like that:
//
// js_PublishMsgAsync(js, &(pae->Msg), NULL);
//
// Note that we use `&(pae->Msg)` so that the library set it to NULL if it takes
// ownership, and the library will not destroy the message when this callback returns.
// No need to destroy anything, everything is handled by the library.
}
int main(int argc, char **argv)
{
natsConnection *conn = NULL;
natsStatistics *stats = NULL;
natsOptions *opts = NULL;
jsCtx *js = NULL;
jsOptions jsOpts;
jsErrCode jerr = 0;
natsStatus s;
int dataLen=0;
volatile int errors = 0;
bool delStream = false;
opts = parseArgs(argc, argv, usage);
dataLen = (int) strlen(payload);
s = natsConnection_Connect(&conn, opts);
if (s == NATS_OK)
s = jsOptions_Init(&jsOpts);
if (s == NATS_OK)
{
if (async)
{
jsOpts.PublishAsync.ErrHandler = _jsPubErr;
jsOpts.PublishAsync.ErrHandlerClosure = (void*) &errors;
}
s = natsConnection_JetStream(&js, conn, &jsOpts);
}
if (s == NATS_OK)
{
jsStreamInfo *si = NULL;
// First check if the stream already exists.
s = js_GetStreamInfo(&si, js, stream, NULL, &jerr);
if (s == NATS_NOT_FOUND)
{
jsStreamConfig cfg;
// Since we are the one creating this stream, we can delete at the end.
delStream = true;
// Initialize the configuration structure.
jsStreamConfig_Init(&cfg);
cfg.Name = stream;
// Set the subject
cfg.Subjects = (const char*[1]){subj};
cfg.SubjectsLen = 1;
// Make it a memory stream.
cfg.Storage = js_MemoryStorage;
// Add the stream,
s = js_AddStream(&si, js, &cfg, NULL, &jerr);
}
if (s == NATS_OK)
{
printf("Stream %s has %" PRIu64 " messages (%" PRIu64 " bytes)\n",
si->Config->Name, si->State.Msgs, si->State.Bytes);
// Need to destroy the returned stream object.
jsStreamInfo_Destroy(si);
}
}
if (s == NATS_OK)
s = natsStatistics_Create(&stats);
if (s == NATS_OK)
{
printf("\nSending %" PRId64 " messages to subject '%s'\n", total, stream);
start = nats_Now();
}
for (count = 0; (s == NATS_OK) && (count < total); count++)
{
if (async)
s = js_PublishAsync(js, subj, (const void*) payload, dataLen, NULL);
else
{
jsPubAck *pa = NULL;
s = js_Publish(&pa, js, subj, (const void*) payload, dataLen, NULL, &jerr);
if (s == NATS_OK)
{
if (pa->Duplicate)
printf("Got a duplicate message! Sequence=%" PRIu64 "\n", pa->Sequence);
jsPubAck_Destroy(pa);
}
}
}
if ((s == NATS_OK) && async)
{
jsPubOptions jsPubOpts;
jsPubOptions_Init(&jsPubOpts);
// Let's set it to 30 seconds, if getting "Timeout" errors,
// this may need to be increased based on the number of messages
// being sent.
jsPubOpts.MaxWait = 30000;
s = js_PublishAsyncComplete(js, &jsPubOpts);
if (s == NATS_TIMEOUT)
{
// Let's get the list of pending messages. We could resend,
// etc, but for now, just destroy them.
natsMsgList list;
js_PublishAsyncGetPendingList(&list, js);
natsMsgList_Destroy(&list);
}
}
if (s == NATS_OK)
{
jsStreamInfo *si = NULL;
elapsed = nats_Now() - start;
printStats(STATS_OUT, conn, NULL, stats);
printPerf("Sent");
if (errors != 0)
printf("There were %d asynchronous errors\n", errors);
// Let's report some stats after the run
s = js_GetStreamInfo(&si, js, stream, NULL, &jerr);
if (s == NATS_OK)
{
printf("\nStream %s has %" PRIu64 " messages (%" PRIu64 " bytes)\n",
si->Config->Name, si->State.Msgs, si->State.Bytes);
jsStreamInfo_Destroy(si);
}
}
if (delStream && (js != NULL))
{
printf("\nDeleting stream %s: ", stream);
s = js_DeleteStream(js, stream, NULL, &jerr);
if (s == NATS_OK)
printf("OK!");
printf("\n");
}
if (s != NATS_OK)
{
printf("Error: %u - %s - jerr=%u\n", s, natsStatus_GetText(s), jerr);
nats_PrintLastErrorStack(stderr);
}
// Destroy all our objects to avoid report of memory leak
jsCtx_Destroy(js);
natsStatistics_Destroy(stats);
natsConnection_Destroy(conn);
natsOptions_Destroy(opts);
// To silence reports of memory still in used with valgrind
nats_Close();
return 0;
}