// SPDX-FileCopyrightText: 2024 Hiredict Contributors // SPDX-FileCopyrightText: 2024 Salvatore Sanfilippo // // SPDX-License-Identifier: BSD-3-Clause // SPDX-License-Identifier: LGPL-3.0-or-later #include #include #include #include #include #include #include void debugCallback(redisAsyncContext *c, void *r, void *privdata) { (void)privdata; redisReply *reply = r; if (reply == NULL) { /* The DEBUG SLEEP command will almost always fail, because we have set a 1 second timeout */ printf("`DEBUG SLEEP` error: %s\n", c->errstr ? c->errstr : "unknown error"); return; } /* Disconnect after receiving the reply of DEBUG SLEEP (which will not)*/ redisAsyncDisconnect(c); } void getCallback(redisAsyncContext *c, void *r, void *privdata) { redisReply *reply = r; if (reply == NULL) { printf("`GET key` error: %s\n", c->errstr ? c->errstr : "unknown error"); return; } printf("`GET key` result: argv[%s]: %s\n", (char*)privdata, reply->str); /* start another request that demonstrate timeout */ redisAsyncCommand(c, debugCallback, NULL, "DEBUG SLEEP %f", 1.5); } void connectCallback(const redisAsyncContext *c, int status) { if (status != REDIS_OK) { printf("connect error: %s\n", c->errstr); return; } printf("Connected...\n"); } void disconnectCallback(const redisAsyncContext *c, int status) { if (status != REDIS_OK) { printf("disconnect because of error: %s\n", c->errstr); return; } printf("Disconnected...\n"); } int main (int argc, char **argv) { signal(SIGPIPE, SIG_IGN); struct sd_event *event; sd_event_default(&event); redisAsyncContext *c = redisAsyncConnect("127.0.0.1", 6379); if (c->err) { printf("Error: %s\n", c->errstr); redisAsyncFree(c); return 1; } redisLibsdeventAttach(c,event); redisAsyncSetConnectCallback(c,connectCallback); redisAsyncSetDisconnectCallback(c,disconnectCallback); redisAsyncSetTimeout(c, (struct timeval){ .tv_sec = 1, .tv_usec = 0}); /* In this demo, we first `set key`, then `get key` to demonstrate the basic usage of libsdevent adapter. Then in `getCallback`, we start a `debug sleep` command to create 1.5 second long request. Because we have set a 1 second timeout to the connection, the command will always fail with a timeout error, which is shown in the `debugCallback`. */ redisAsyncCommand(c, NULL, NULL, "SET key %b", argv[argc-1], strlen(argv[argc-1])); redisAsyncCommand(c, getCallback, (char*)"end-1", "GET key"); /* sd-event does not quit when there are no handlers registered. Manually exit after 1.5 seconds */ sd_event_source *s; sd_event_add_time_relative(event, &s, CLOCK_MONOTONIC, 1500000, 1, NULL, NULL); sd_event_loop(event); sd_event_source_disable_unref(s); sd_event_unref(event); return 0; }