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Modules: hellodict example WIP #1: GET command.

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This commit is contained in:
antirez 2018-09-27 11:22:43 +02:00
parent 880ca07719
commit 20f047965c
1 changed files with 18 additions and 0 deletions
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18
src/modules/hellodict.c
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@ -54,6 +54,20 @@ int cmd_SET(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
return RedisModule_ReplyWithSimpleString(ctx, "OK"); return RedisModule_ReplyWithSimpleString(ctx, "OK");
} }
/* HELLODICT.GET <key>
*
* Return the value of the specified key, or a null reply if the key
* is not defined. */
int cmd_GET(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
if (argc != 2) return RedisModule_WrongArity(ctx);
RedisModuleString *val = RedisModule_DictGet(Keyspace,argv[1],NULL);
if (val == NULL) {
return RedisModule_ReplyWithNull(ctx);
} else {
return RedisModule_ReplyWithString(ctx, val);
}
}
/* This function must be present on each Redis module. It is used in order to /* This function must be present on each Redis module. It is used in order to
* register the commands into the Redis server. */ * register the commands into the Redis server. */
int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) { int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
@ -67,6 +81,10 @@ int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
cmd_SET,"write deny-oom",1,1,0) == REDISMODULE_ERR) cmd_SET,"write deny-oom",1,1,0) == REDISMODULE_ERR)
return REDISMODULE_ERR; return REDISMODULE_ERR;
if (RedisModule_CreateCommand(ctx,"hellodict.get",
cmd_GET,"readonly",1,1,0) == REDISMODULE_ERR)
return REDISMODULE_ERR;
/* Create our global dictionray. Here we'll set our keys and values. */ /* Create our global dictionray. Here we'll set our keys and values. */
Keyspace = RedisModule_CreateDict(NULL); Keyspace = RedisModule_CreateDict(NULL);