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#define _XOPEN_SOURCE 600 /* Required by libuv (pthread_rwlock_t) */
#include <valkey/async.h>
#include <valkey/valkey.h>
#include <valkey/adapters/libuv.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
void debugCallback(valkeyAsyncContext *c, void *r, void *privdata) {
(void)privdata; //unused
valkeyReply *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)*/
valkeyAsyncDisconnect(c);
}
void getCallback(valkeyAsyncContext *c, void *r, void *privdata) {
valkeyReply *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 */
valkeyAsyncCommand(c, debugCallback, NULL, "DEBUG SLEEP %f", 1.5);
}
void connectCallback(valkeyAsyncContext *c, int status) {
if (status != VALKEY_OK) {
printf("connect error: %s\n", c->errstr);
return;
}
printf("Connected...\n");
}
void disconnectCallback(const valkeyAsyncContext *c, int status) {
if (status != VALKEY_OK) {
printf("disconnect because of error: %s\n", c->errstr);
return;
}
printf("Disconnected...\n");
}
int main(int argc, char **argv) {
#ifndef _WIN32
signal(SIGPIPE, SIG_IGN);
#endif
uv_loop_t *loop = uv_default_loop();
valkeyAsyncContext *c = valkeyAsyncConnect("127.0.0.1", 6379);
if (c->err) {
/* Let *c leak for now... */
printf("Error: %s\n", c->errstr);
return 1;
}
valkeyLibuvAttach(c, loop);
valkeyAsyncSetConnectCallback(c, connectCallback);
valkeyAsyncSetDisconnectCallback(c, disconnectCallback);
valkeyAsyncSetTimeout(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 libuv 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`.
*/
valkeyAsyncCommand(
c, NULL, NULL, "SET key %b", argv[argc - 1], strlen(argv[argc - 1]));
valkeyAsyncCommand(c, getCallback, (char *)"end-1", "GET key");
uv_run(loop, UV_RUN_DEFAULT);
return 0;
}
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