1331ce96af
Note that this was an experimental API that can only be enabled with REIDSMODULE_EXPERIMENTAL_API, so it is subject to change until its promoted to stable API. Sorry for the breakage, it is trivial to resolve btw. This change will not be back ported to Redis 4.0.
109 lines
4.6 KiB
C
109 lines
4.6 KiB
C
/* Helloworld cluster -- A ping/pong cluster API example.
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*
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* -----------------------------------------------------------------------------
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*
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* Copyright (c) 2018, Salvatore Sanfilippo <antirez at gmail dot com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Redis nor the names of its contributors may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#define REDISMODULE_EXPERIMENTAL_API
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#include "../redismodule.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <string.h>
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#define MSGTYPE_PING 1
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#define MSGTYPE_PONG 2
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/* HELLOCLUSTER.PINGALL */
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int PingallCommand_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
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REDISMODULE_NOT_USED(argv);
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REDISMODULE_NOT_USED(argc);
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RedisModule_SendClusterMessage(ctx,NULL,MSGTYPE_PING,(unsigned char*)"Hey",3);
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return RedisModule_ReplyWithSimpleString(ctx, "OK");
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}
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/* HELLOCLUSTER.LIST */
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int ListCommand_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
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REDISMODULE_NOT_USED(argv);
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REDISMODULE_NOT_USED(argc);
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size_t numnodes;
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char **ids = RedisModule_GetClusterNodesList(ctx,&numnodes);
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if (ids == NULL) {
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return RedisModule_ReplyWithError(ctx,"Cluster not enabled");
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}
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RedisModule_ReplyWithArray(ctx,numnodes);
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for (size_t j = 0; j < numnodes; j++) {
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int port;
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RedisModule_GetClusterNodeInfo(ctx,ids[j],NULL,NULL,&port,NULL);
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RedisModule_ReplyWithArray(ctx,2);
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RedisModule_ReplyWithStringBuffer(ctx,ids[j],REDISMODULE_NODE_ID_LEN);
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RedisModule_ReplyWithLongLong(ctx,port);
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}
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RedisModule_FreeClusterNodesList(ids);
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return RedisModule_ReplyWithSimpleString(ctx, "OK");
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}
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/* Callback for message MSGTYPE_PING */
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void PingReceiver(RedisModuleCtx *ctx, const char *sender_id, uint8_t type, const unsigned char *payload, uint32_t len) {
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RedisModule_Log(ctx,"notice","PING (type %d) RECEIVED from %.*s: '%.*s'",
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type,REDISMODULE_NODE_ID_LEN,sender_id,(int)len, payload);
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RedisModule_SendClusterMessage(ctx,NULL,MSGTYPE_PONG,(unsigned char*)"Ohi!",4);
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}
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/* Callback for message MSGTYPE_PONG. */
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void PongReceiver(RedisModuleCtx *ctx, const char *sender_id, uint8_t type, const unsigned char *payload, uint32_t len) {
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RedisModule_Log(ctx,"notice","PONG (type %d) RECEIVED from %.*s: '%.*s'",
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type,REDISMODULE_NODE_ID_LEN,sender_id,(int)len, payload);
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}
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/* This function must be present on each Redis module. It is used in order to
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* register the commands into the Redis server. */
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int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
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REDISMODULE_NOT_USED(argv);
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REDISMODULE_NOT_USED(argc);
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if (RedisModule_Init(ctx,"hellocluster",1,REDISMODULE_APIVER_1)
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== REDISMODULE_ERR) return REDISMODULE_ERR;
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if (RedisModule_CreateCommand(ctx,"hellocluster.pingall",
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PingallCommand_RedisCommand,"readonly",0,0,0) == REDISMODULE_ERR)
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return REDISMODULE_ERR;
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if (RedisModule_CreateCommand(ctx,"hellocluster.list",
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ListCommand_RedisCommand,"readonly",0,0,0) == REDISMODULE_ERR)
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return REDISMODULE_ERR;
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RedisModule_RegisterClusterMessageReceiver(ctx,MSGTYPE_PING,PingReceiver);
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RedisModule_RegisterClusterMessageReceiver(ctx,MSGTYPE_PONG,PongReceiver);
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return REDISMODULE_OK;
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}
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