C++ hiredis示例程序

比眉伴天荒 2022-12-22 08:38 171阅读 0赞

redis.cpp

#ifndef REDIS_GHQ
    #define REDI_GHQ
    #include<iostream>
    #include<hiredis/hiredis.h>
    using namespace std;
    class Redis
    { 
    public:
        Redis(){ 
            _conn=NULL;
            _reply=NULL;
        }
        ~Redis(){ 
            _conn=NULL;
            _reply=NULL;
        }
        bool connect(string host,int port){ 
            _conn = redisConnect(host.c_str(),port);
            if(_conn!=NULL&&_conn->err){ 
                cout<<"连接失败:"<<_conn->err<<endl;
                return 0;
            }
            return 1;        
        }
        void set(string key,string value){ 
            redisCommand(_conn,"set %s %s",key.c_str(),value.c_str());
        }
        string get(string key){ 
            _reply = static_cast<redisReply*> (redisCommand(_conn,"get %s",key.c_str()));
            string s = _reply->str;
            freeReplyObject(_reply);
            return s;
        }
    private:
        redisContext* _conn;
        redisReply * _reply;
    };
    #endif

main.cpp

#include"redis.cpp"
    #include<bits/stdc++.h>
    using namespace std;
    int main(){ 
        Redis* re = new Redis();
        if(re->connect("127.0.0.1",6379)){ 
            cout<<"连接成功";
            string k,v;
            cin>>k>>v;
            while(k!="#"){             
                re->set(k,v);
                cout<<re->get(k);
                cin>>k>>v;
            }
        }
        delete re;
        return 0;
    }

编译：g++ main.cpp -o redis -L/usr/local/lib/ -lhiredis  
运行:./redis

结果：

连接成功
    name ghq
    ghq
    age1 165
    165
    ^C

注意：  
1、需要提前./redis-server打开redis

pipeline操作：

int pipeline_process(struct timeval access_timeout, std::vector<std::string> & pipeline_cmd, 
                            std::vector<std::string> &pipeline_resp, std::vector<bool> &pipeline_resp_status){ 
                if (0 == redis_ctx) { return -1;}
                redisSetTimeout(redis_ctx, access_timeout);
     
                for (int i = 0; i < pipeline_cmd.size();i++)
                { 
                    redisAppendCommand(redis_ctx, pipeline_cmd[i].c_str());
                }
     
                for (int i = 0; i < pipeline_cmd.size();i++)
                { 
                    bool status = false;
                    std::string resp_str = "";
                    redisReply *reply = 0;
     
                    if(redisGetReply(redis_ctx, (void **)&reply) == REDIS_OK
                            && reply != NULL
                            && reply->type == REDIS_REPLY_STRING)
                    { 
                        status = true;
                        resp_str = reply->str;
                    }
                    //free
                    freeReplyObject(reply);
     
                    pipeline_resp_status.push_back(status);
                    pipeline_resp.push_back(resp_str);
     
                }
                return 0;
            }
    参数：
    
    struct timeval access_timeout：访问的超时时间
    
    std::vector<std::string> & pipeline_cmd：pipeline处理的多个请求命令字符串
    
    std::vector<std::string> &pipeline_resp：pipeline处理的多个请求返回的字符串
    
    std::vector<bool> &pipeline_resp_status：pipeline处理的多个请求返回的状态