diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-14 13:40:54 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-14 13:40:54 +0000 |
commit | 317c0644ccf108aa23ef3fd8358bd66c2840bfc0 (patch) | |
tree | c417b3d25c86b775989cb5ac042f37611b626c8a /src/modules/hellocluster.c | |
parent | Initial commit. (diff) | |
download | redis-upstream/5%7.2.4.tar.xz redis-upstream/5%7.2.4.zip |
Adding upstream version 5:7.2.4.upstream/5%7.2.4
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/modules/hellocluster.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/src/modules/hellocluster.c b/src/modules/hellocluster.c new file mode 100644 index 0000000..bc145c2 --- /dev/null +++ b/src/modules/hellocluster.c @@ -0,0 +1,118 @@ +/* Helloworld cluster -- A ping/pong cluster API example. + * + * ----------------------------------------------------------------------------- + * + * Copyright (c) 2018, Salvatore Sanfilippo <antirez at gmail dot com> + * 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 <stdio.h> +#include <stdlib.h> +#include <ctype.h> +#include <string.h> + +#define MSGTYPE_PING 1 +#define MSGTYPE_PONG 2 + +/* HELLOCLUSTER.PINGALL */ +int PingallCommand_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) { + REDISMODULE_NOT_USED(argv); + REDISMODULE_NOT_USED(argc); + + RedisModule_SendClusterMessage(ctx,NULL,MSGTYPE_PING,"Hey",3); + return RedisModule_ReplyWithSimpleString(ctx, "OK"); +} + +/* HELLOCLUSTER.LIST */ +int ListCommand_RedisCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) { + REDISMODULE_NOT_USED(argv); + REDISMODULE_NOT_USED(argc); + + size_t numnodes; + char **ids = RedisModule_GetClusterNodesList(ctx,&numnodes); + if (ids == NULL) { + return RedisModule_ReplyWithError(ctx,"Cluster not enabled"); + } + + RedisModule_ReplyWithArray(ctx,numnodes); + for (size_t j = 0; j < numnodes; j++) { + int port; + RedisModule_GetClusterNodeInfo(ctx,ids[j],NULL,NULL,&port,NULL); + RedisModule_ReplyWithArray(ctx,2); + RedisModule_ReplyWithStringBuffer(ctx,ids[j],REDISMODULE_NODE_ID_LEN); + RedisModule_ReplyWithLongLong(ctx,port); + } + RedisModule_FreeClusterNodesList(ids); + return REDISMODULE_OK; +} + +/* Callback for message MSGTYPE_PING */ +void PingReceiver(RedisModuleCtx *ctx, const char *sender_id, uint8_t type, const unsigned char *payload, uint32_t len) { + RedisModule_Log(ctx,"notice","PING (type %d) RECEIVED from %.*s: '%.*s'", + type,REDISMODULE_NODE_ID_LEN,sender_id,(int)len, payload); + RedisModule_SendClusterMessage(ctx,NULL,MSGTYPE_PONG,"Ohi!",4); + RedisModuleCallReply *reply = RedisModule_Call(ctx, "INCR", "c", "pings_received"); + RedisModule_FreeCallReply(reply); +} + +/* Callback for message MSGTYPE_PONG. */ +void PongReceiver(RedisModuleCtx *ctx, const char *sender_id, uint8_t type, const unsigned char *payload, uint32_t len) { + RedisModule_Log(ctx,"notice","PONG (type %d) RECEIVED from %.*s: '%.*s'", + type,REDISMODULE_NODE_ID_LEN,sender_id,(int)len, payload); +} + +/* 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,"hellocluster",1,REDISMODULE_APIVER_1) + == REDISMODULE_ERR) return REDISMODULE_ERR; + + if (RedisModule_CreateCommand(ctx,"hellocluster.pingall", + PingallCommand_RedisCommand,"readonly",0,0,0) == REDISMODULE_ERR) + return REDISMODULE_ERR; + + if (RedisModule_CreateCommand(ctx,"hellocluster.list", + ListCommand_RedisCommand,"readonly",0,0,0) == REDISMODULE_ERR) + return REDISMODULE_ERR; + + /* Disable Redis Cluster sharding and redirections. This way every node + * will be able to access every possible key, regardless of the hash slot. + * This way the PING message handler will be able to increment a specific + * variable. Normally you do that in order for the distributed system + * you create as a module to have total freedom in the keyspace + * manipulation. */ + RedisModule_SetClusterFlags(ctx,REDISMODULE_CLUSTER_FLAG_NO_REDIRECTION); + + /* Register our handlers for different message types. */ + RedisModule_RegisterClusterMessageReceiver(ctx,MSGTYPE_PING,PingReceiver); + RedisModule_RegisterClusterMessageReceiver(ctx,MSGTYPE_PONG,PongReceiver); + return REDISMODULE_OK; +} |