#pragma once #include "../acl_cpp_define.hpp" #include #include "../stream/socket_stream.hpp" #include "../stdlib/string.hpp" #include "../connpool/connect_client.hpp" #if !defined(ACL_CLIENT_ONLY) && !defined(ACL_REDIS_DISABLE) namespace acl { class dbuf_pool; class redis_result; class redis_request; class sslbase_conf; /** * redis 客户端对象网络通信类,通过此类将组织好的 redis 请求命令发给 redis * 服务端,同时接收 redis 服务端响应结果;该类继承于 connect_client 类,主要 * 为了使用连接池功能。 * redis client network IO class. The redis request is sent to server * and the server's respond is handled in this class. The class inherits * connect_client, which can use the connection pool function. */ class ACL_CPP_API redis_client : public connect_client { public: /** * 构造函数 * constructor * @param addr {const char*} redis-server 监听地址 * the redis-server listening addr * @param conn_timeout {int} 连接 redis-server 的超时时间(秒) * the timeout in seconds to connect the redis-server * @param rw_timeout {int} 与 redis-server 进行通信的 IO 超时时间(秒) * the network IO timeout in seconds with the redis-server */ redis_client(const char* addr, int conn_timeout = 60, int rw_timeout = 30, bool retry = true); ~redis_client(void); /** * 设置 SSL 通信方式下的配置句柄,内部缺省值为 NULL,如果设置了 SSL 连 * 接配置对象,则内部切换成 SSL 通信方式 * set SSL communication with Redis-server if ssl_conf not NULL * @param ssl_conf {sslbase_conf*} */ void set_ssl_conf(sslbase_conf* ssl_conf); /** * 调用本函数设置连接 redis 服务的连接密码 * @param pass {const char*} */ void set_password(const char* pass); /** * 设置本连接所对应的 db,当连接建立后如果指定的 db 值大于 0,则内部自动 * 选择对应的 db,注意:该功能仅针对非集群模式 * if db > 0 in no cluster mode, select the db when the connection * is created. * @param dbnum {int} */ void set_db(int dbnum); /** * 获得本连接所选择的 db * get db for the connection * @return {int} */ int get_db(void) const { return dbnum_; } /** * 获得当前连接的服务器地址,即由 redis_client 构造时传入的地址 * @return {const char*} */ const char* get_addr(void) const { return addr_; } /** * 在进行每个命令处理前,是否要求检查 socket 句柄与地址的匹配情况,当 * 打开该选项时,将会严格检查匹配情况,但会影响一定性能,因此该设置仅 * 用在 DEBUG 时的运行场景 * @param on {bool} */ void set_check_addr(bool on); /** * 判断该网络连接对象是否已经关闭 * check if the connection has been finish * @return {bool} */ bool eof(void) const; /** * 关闭网络连接 * close the connection to the redis-server */ void close(void); /** * 获得网络连接流 * get acl::socket_stream from the connection * @return {acl::socket_stream*} 如果连接已经关闭则返回 NULL * NULL will be returned if the connectioin has been closed */ socket_stream* get_stream(void); /** * 对于请求数据包,此函数设置在组装请求数据包的时候合成一个数据包发送 * just for request package, setting flag for sending data with * multi data chunks; this is useful when the request data is large * @param on {bool} 当为 true 时则不会将请求数据合成一个数据包发送 * if true the request data will not be combined one package */ void set_slice_request(bool on); /** * 对于响应数据包,此函数设置是否将 redis-server 响应的数据分拆成多个数据块, * 这对于大的数据包有用处,可以不必一次性分配一个连续性的大内存 * just for response package, settint flag for receiving data * if split the large response data into multi little chunks * @param on {bool} 当为 true 时则对响应数据包进行拆分 * if true the response data will be splitted into multi little * data, which is useful for large reponse data for avoiding * malloc large continuously memory from system. */ void set_slice_respond(bool on); /** * 用于非分片发送方式,向 redis-server 发送请求数据,同时读取并分析 * 服务端返回的响应数据 * send request to redis-server, and read/anlyse response from server, * this function will be used for no-slice request mode. * @param pool {dbuf_pool*} 内存池管理器对象 * memory pool manager * @param req {const string&} 请求数据包 * the request package * @param nchildren {size_t} 响应数据有几个数据对象 * the data object number in the server's response data * @return {const redis_result*} 读到的服务器响应对象,返回 NULL 则出错, * 该对象不必手工释放,因为其是在 pool 内存池对象上动态分配的,所以当 * 释放 pool 时该结果对象一同被释放 * the result object from server's response, NULL will be returned * when some error happens; the result object needn't be freed * manually, which was created in the pool object, and will be freed * when the pool were freed. * */ const redis_result* run(dbuf_pool* pool, const string& req, size_t nchildren, int* rw_timeout = NULL); /** * 用于分片发送请求方式 * just for sending proccess in slice request mode * @param req {const redis_request&} 请求数据对象 * request object */ const redis_result* run(dbuf_pool* pool, const redis_request& req, size_t nchildren, int* rw_timeout = NULL); protected: // 基类虚函数 // @override bool open(void); private: socket_stream conn_; bool check_addr_; char* addr_; char* pass_; bool retry_; bool authing_; string buf_; bool slice_req_; bool slice_res_; int dbnum_; sslbase_conf* ssl_conf_; redis_result* get_redis_objects(dbuf_pool* pool, size_t nobjs); redis_result* get_redis_object(dbuf_pool* pool); redis_result* get_redis_error(dbuf_pool* pool); redis_result* get_redis_status(dbuf_pool* pool); redis_result* get_redis_integer(dbuf_pool* pool); redis_result* get_redis_string(dbuf_pool* pool); redis_result* get_redis_array(dbuf_pool* pool); void put_data(dbuf_pool* pool, redis_result* rr, const char* data, size_t len); bool check_connection(socket_stream& conn); }; } // end namespace acl #endif // !defined(ACL_CLIENT_ONLY) && !defined(ACL_REDIS_DISABLE)