RedisClient.cpp

class Redis
{
    public:
        redisContext* context;
        Redis(const char * ip="127.0.0.1",int port=6379){
            this->context = redisConnect(ip,port);
            if(this->context == NULL || context->err){
                if(context){
                    printf("Error: %s\n",context->errstr);
                    exit(-1);
                }else{
                    printf("can not allocate redis context\n");
                    exit(-1);
                }
            }
        }
        
        string hget(const char* key,const  char* hkey){
            const char* argv[3];
            size_t argvlen[3];
            argv[0] = "HGET";
            argvlen[0] = 4;
            argv[1] = key;
            argvlen[1] = strlen(key);
            argv[2] = hkey;
            argvlen[2] = strlen(hkey);
            redisReply* reply =(redisReply*) redisCommandArgv(this->context, 3, argv, argvlen);
            string value;
            if(reply->type != REDIS_REPLY_NIL){
                value = string(reply->str,reply->str + reply->len);
            }
            freeReplyObject(reply);
            return value;
        }
        int hset(const char* key, const char* hkey, const char* value){
            redisReply* reply =(redisReply*) redisCommand(this->context, "HSET %s %s %s",key,hkey, value);
            freeReplyObject(reply);
            return 1;
        }
        int hset(const char* key,const char* hkey,const char* hvalue, size_t hvaluelen){
            const char* argv[4];
            size_t argvlen[4];
            argv[0] = "HSET";
            argvlen[0] = 4;
            argv[1] = key;
            argvlen[1] = strlen(key);
            argv[2] = hkey;
            argvlen[2] = strlen(hkey);
            argv[3] = hvalue;
            argvlen[3] = hvaluelen;
            redisReply * reply =(redisReply*) redisCommandArgv(this->context, 4, argv, argvlen);
            freeReplyObject(reply);
            return 1;
        }
        /**delete key*/�
        int del(const char* key){
            int res = 0;4
            redisReply* reply = (redisReply*)redisCommand(this->context, "DEL %s", key);
            if(reply->type == REDIS_REPLY_INTEGER){
                if(reply->integer == 1L)
                    res = 1;
            }
            freeReplyObject(reply);
            return res;
        }

        /*if Key ID exists*/
        int existsKey(const char* ID){
            redisReply * reply = (redisReply*)redisCommand(this->context,"exists %s",ID);
            int res = 0;
            if(reply->type == REDIS_REPLY_INTEGER){
                if(reply->integer == 1L)
                    res  = 1;
            }
            freeReplyObject(reply);
            return res;
        }
        virtual ~Redis(){
            redisFree(this->context);
        }
    protected:
    private:
};