/* Timer API example -- Register and handle timer events * * ----------------------------------------------------------------------------- * * Copyright (c) 2018, Salvatore Sanfilippo * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * * Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * Neither the name of Redis nor the names of its contributors may be used * to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include "../redismodule.h" #include #include #include #include /* Timer callback. */ void timerHandler(RedisModuleCtx *ctx, void *data) { REDISMODULE_NOT_USED(ctx); printf("Fired %s!\n", (char *)data); RedisModule_Free(data); } /* HELLOTIMER.TIMER*/ int TimerCommand_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) { REDISMODULE_NOT_USED(argv); REDISMODULE_NOT_USED(argc); for (int j = 0; j < 10; j++) { int delay = rand() % 5000; char *buf = RedisModule_Alloc(256); snprintf(buf,256,"After %d", delay); RedisModuleTimerID tid = RedisModule_CreateTimer(ctx,delay,timerHandler,buf); REDISMODULE_NOT_USED(tid); } return RedisModule_ReplyWithSimpleString(ctx, "OK"); } /* This function must be present on each Redis module. It is used in order to * register the commands into the Redis server. */ int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) { REDISMODULE_NOT_USED(argv); REDISMODULE_NOT_USED(argc); if (RedisModule_Init(ctx,"hellotimer",1,REDISMODULE_APIVER_1) == REDISMODULE_ERR) return REDISMODULE_ERR; if (RedisModule_CreateCommand(ctx,"hellotimer.timer", TimerCommand_RedisCommand,"readonly",0,0,0) == REDISMODULE_ERR) return REDISMODULE_ERR; return REDISMODULE_OK; }