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Modules hooks: FLUSHDB event example.

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This commit is contained in:
antirez 2019-10-23 10:37:04 +02:00
parent ed833c9f99
commit bc1ef48e56
2 changed files with 29 additions and 0 deletions
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2
src/module.c
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@ -5870,6 +5870,8 @@ void moduleFireServerEvent(uint64_t eid, int subid, void *data) {
modulePopulateClientInfoStructure(&civ1,data,
el->event.dataver);
moduledata = &civ1;
} else if (eid == REDISMODULE_EVENT_FLUSHDB) {
moduledata = data;
}
el->callback(&ctx,el->event,subid,moduledata);
moduleFreeContext(&ctx);

27
src/modules/hellohook.c
View File

@ -50,6 +50,31 @@ void clientChangeCallback(RedisModuleCtx *ctx, RedisModuleEvent e, uint64_t sub,
ci->id,ci->addr,ci->port);
}
void flushdbCallback(RedisModuleCtx *ctx, RedisModuleEvent e, uint64_t sub, void *data)
{
REDISMODULE_NOT_USED(ctx);
REDISMODULE_NOT_USED(e);
RedisModuleFlushInfo *fi = data;
if (sub == REDISMODULE_SUBEVENT_FLUSHDB_START) {
if (fi->dbnum != -1) {
RedisModuleCallReply *reply;
reply = RedisModule_Call(ctx,"DBSIZE","");
long long numkeys = RedisModule_CallReplyInteger(reply);
printf("FLUSHDB event of database %d started (%lld keys in DB)\n",
fi->dbnum, numkeys);
} else {
printf("FLUSHALL event started\n");
}
} else {
if (fi->dbnum != -1) {
printf("FLUSHDB event of database %d ended\n",fi->dbnum);
} else {
printf("FLUSHALL event ended\n");
}
}
}
/* 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) {
@ -61,5 +86,7 @@ int RedisModule_OnLoad(RedisModuleCtx *ctx, RedisModuleString **argv, int argc)
RedisModule_SubscribeToServerEvent(ctx,
RedisModuleEvent_ClientChange, clientChangeCallback);
RedisModule_SubscribeToServerEvent(ctx,
RedisModuleEvent_FlushDB, flushdbCallback);
return REDISMODULE_OK;
}