acl/lib_acl_cpp/include/acl_cpp/redis/redis_command.hpp

#pragma once
#include "../acl_cpp_define.hpp"
#include "../stdlib/noncopyable.hpp"
#include "../stdlib/tbox.hpp"
#include <map>
#include <list>
#include <vector>
#include "redis_result.hpp"

#if !defined(ACL_CLIENT_ONLY) && !defined(ACL_REDIS_DISABLE)

namespace acl
{

class redis_request;
class redis_client;
class redis_client_cluster;
class redis_client_pipeline;
class redis_pipeline_message;

/**
 * redis <EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD>鸸<EFBFBD><EFBFBD>;
 * the redis command classes's base virtual class, which includes the basic
 * functions for all sub-classes
 */
class ACL_CPP_API redis_command : public noncopyable
{
public:
	/**
	 * ȱʡ<EFBFBD>Ĺ<EFBFBD><EFBFBD>캯<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ô˹<EFBFBD><EFBFBD>캯<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * set_client <EFBFBD><EFBFBD> set_cluster <EFBFBD><EFBFBD><EFBFBD><EFBFBD> redis <EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨѶ<EFBFBD><EFBFBD>ʽ<EFBFBD><EFBFBD>
	 * default constructor. You must set the communication method by
	 * set_client or set_cluster functions.
	 */
	redis_command(void);

	/**
	 * <EFBFBD><EFBFBD>ʹ<EFBFBD>÷Ǽ<EFBFBD>Ⱥģʽʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ô˹<EFBFBD><EFBFBD>캯<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> redis ͨ<EFBFBD>Ŷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * Using this constructor to set the redis communication mode,
	 * usually in no-cluster mode.
	 * @param conn {redis_client*} redis ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 *  the redis communication in no-cluster mode
	 */
	redis_command(redis_client* conn);

	/**
	 * <EFBFBD><EFBFBD>Ⱥģʽ<EFBFBD>Ĺ<EFBFBD><EFBFBD>캯<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱָ<EFBFBD><EFBFBD><EFBFBD>˼<EFBFBD>Ⱥģʽ<EFBFBD><EFBFBD>
	 * redis_client_cluster <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * Using this constructor to set the redis_client_cluster, usually in
	 * cluster mode.
	 * @param cluster {redis_client_cluster*} redis <EFBFBD><EFBFBD>Ⱥ<EFBFBD><EFBFBD><EFBFBD>Ӷ<EFBFBD><EFBFBD><EFBFBD>
	 *  redis cluster object in cluster mode
	 *  the max of every connection pool with all the redis nodes,
	 *  if be set 0, then there is no connections limit in
	 *  connections pool.
	 */
	redis_command(redis_client_cluster* cluster);

	ACL_CPP_DEPRECATED
	redis_command(redis_client_cluster* cluster, size_t max_conns);

	redis_command(redis_client_pipeline* pipeline);

	virtual ~redis_command(void);

	/**
	 * <EFBFBD>ڽ<EFBFBD><EFBFBD><EFBFBD>ÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> socket <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD>ƥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * <EFBFBD>򿪸<EFBFBD>ѡ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϸ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӱ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˸<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ý<EFBFBD>
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD> DEBUG ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>г<EFBFBD><EFBFBD><EFBFBD>
	 * @param on {bool}
	 */
	void set_check_addr(bool on);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD>ظ<EFBFBD>ʹ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>̳<EFBFBD><EFBFBD><EFBFBD> redis_command <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> redis ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>
	 * <EFBFBD><EFBFBD>һ<EFBFBD>ε<EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>ñ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD><EFBFBD>ϴβ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
	 * when reusing a redis command sub-class, the reset method should be
	 * called first to rlease some resources in last command operation
	 * @param save_slot {bool} <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ü<EFBFBD>Ⱥģʽʱ<EFBFBD><EFBFBD><EFBFBD>ò<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 *  <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϣ<EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> redis <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>е<EFBFBD> key ֵ<EFBFBD><EFBFBD><EFBFBD>䣬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ա<EFBFBD>
	 *  <EFBFBD><EFBFBD><EFBFBD>˹<EFBFBD>ϣ<EFBFBD><EFBFBD>ֵ<EFBFBD>Լ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>½<EFBFBD><EFBFBD>м<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD>;
	 *  when in cluster mode, if your operations is on the same key, you
	 *  can set the param save_slot to false which can reduse the times
	 *  of compute the same key's hash-slot.
	 */
	void clear(bool save_slot = false);

	ACL_CPP_DEPRECATED_FOR("clear")
	void reset(bool save_slot = false);

	/**
	 * <EFBFBD><EFBFBD>ʹ<EFBFBD>÷Ǽ<EFBFBD>Ⱥ<EFBFBD><EFBFBD>ʽʱ<EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӳػ<EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӷ<EFBFBD><EFBFBD><EFBFBD>;
	 * when not using cluster mode, the function is used
	 * to set the connection for next redis command operation.
	 * @param conn {redis_client*} <EFBFBD><EFBFBD> redis <EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>й<EFBFBD><EFBFBD><EFBFBD>;
	 *  the redis connection to be set in next redis operation
	 */
	void set_client(redis_client* conn);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>ǰ redis <EFBFBD>ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӷ<EFBFBD><EFBFBD><EFBFBD>;
	 * get redis connection set by set_client function
	 * @return {redis_client*} <EFBFBD><EFBFBD><EFBFBD><EFBFBD> NULL <EFBFBD><EFBFBD>ʾû<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>뵱ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 *  <EFBFBD><EFBFBD><EFBFBD>а<EFBFBD><EFBFBD><EFBFBD>;
	 *  the internal redis connection be returned, NULL if no redis
	 *  connection be set 
	 */
	redis_client* get_client(void) const
	{
		return conn_;
	}

	/**
	 * <EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>ǰ redis <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>󶨵ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD>ֻ<EFBFBD>е<EFBFBD><EFBFBD>ö<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> redis_client
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> set_client) <EFBFBD>ſ<EFBFBD><EFBFBD>Ե<EFBFBD><EFBFBD>ñ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * get the redis-server's addr used by the current command. this
	 * method can only be used only if the redis_client was set by
	 * set_client method.
	 * @return {const char*} <EFBFBD><EFBFBD><EFBFBD>ؿմ<EFBFBD> "" <EFBFBD><EFBFBD>ʾû<EFBFBD>а<EFBFBD><EFBFBD><EFBFBD> redis <EFBFBD><EFBFBD><EFBFBD>Ӷ<EFBFBD><EFBFBD><EFBFBD>
	 *  if "" was resturned, the redis connection was not set
	 */
	const char* get_client_addr(void) const;

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӳؼ<EFBFBD>Ⱥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
	 * set the redis cluster object in redis cluster mode
	 * @param cluster {redis_client_cluster*} redis <EFBFBD><EFBFBD>Ⱥ<EFBFBD><EFBFBD><EFBFBD>Ӷ<EFBFBD><EFBFBD><EFBFBD>;
	 *  the redis_cluster connection object which can connect to any
	 *  redis-server and support connection pool
	 *  when dynamicly creating connection pool to any redis-server, use
	 *  this param to limit the max number for each connection pool
	 */
	void set_cluster(redis_client_cluster* cluster);

	ACL_CPP_DEPRECATED
	void set_cluster(redis_client_cluster* cluster, size_t max_conns);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӳؼ<EFBFBD>Ⱥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
	 * get redis_cluster object set by set_cluster function
	 * @return {redis_client_cluster*}
	 */
	redis_client_cluster* get_cluster(void) const
	{
		return cluster_;
	}

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD>pipelineͨ<EFBFBD>Ŷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD>pipelineģʽ
	 * set the redis communication in pipeline mode
	 * @param pipeline {redis_client_pipeline*} pipeline communication object
	 * @param use_mbox {bool} if using acl::mbox to get the result,
	 *  acl::tbox will be used if use_mbox is set to false; acl::mbox
	 *  will be used as default internal.
	 */
	void set_pipeline(redis_client_pipeline* pipeline, bool use_mbox = true);

	/**
	 * get the redis pipeline communication object been set before
	 * @return {redis_client_pipeline*} return NULL if not set
	 */
	redis_client_pipeline* get_pipeline(void) const
	{
		return pipeline_;
	}

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD>ؾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> redis_command <EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
	 * get memory pool handle been set
	 * @return {dbuf_pool*}
	 */
	dbuf_pool* get_dbuf(void) const
	{
		return dbuf_;
	}

	/**
	 * <EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
	 * get the result type returned from redis-server
	 * @return {redis_result_t}
	 */
	redis_result_t result_type(void) const;

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵΪ REDIS_RESULT_STATUS <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>״̬<EFBFBD><EFBFBD>Ϣ;
	 * when result type is REDIS_RESULT_STATUS, the status info can be
	 * get by this function
	 * @return {const char*} <EFBFBD><EFBFBD><EFBFBD><EFBFBD> "" <EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
	 *  "" will be returned on error
	 */
	const char* result_status(void) const;

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵΪ REDIS_RESULT_ERROR <EFBFBD><EFBFBD><EFBFBD>ͣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>س<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ;
	 * when result type is REDIS_RESULT_ERROR, the error info can be
	 * get by this function
	 * @return {const char*} <EFBFBD><EFBFBD><EFBFBD>ؿմ<EFBFBD> "" <EFBFBD><EFBFBD>ʾû<EFBFBD>г<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ;
	 *  "" will be returned when no error info
	 */
	const char* result_error(void) const;

	/**
	 * <EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>洢<EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD><EFBFBD>, <EFBFBD>÷<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ի<EFBFBD><EFBFBD>ý<EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * (result_child/result_value) <EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ԫ<EFBFBD>صĸ<EFBFBD><EFBFBD><EFBFBD>;
	 * get number of result objects, just for functions
	 * result_child/result_value 
	 * @return {size_t} <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD>洢<EFBFBD><EFBFBD><EFBFBD>͵Ķ<EFBFBD>Ӧ<EFBFBD><EFBFBD>ϵ<EFBFBD><EFBFBD><EFBFBD>£<EFBFBD>
	 *  the relation between return value and result type, as below:
	 *  REDIS_RESULT_ERROR: 1
	 *  REDIS_RESULT_STATUS: 1
	 *  REDIS_RESULT_INTEGER: 1
	 *  REDIS_RESULT_STRING: > 0 ʱ<EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݱ<EFBFBD><EFBFBD>зֳɷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD><EFBFBD>;
	 *       when the result type is REDIS_RESULT_STRING and the the
	 *       string is too large, the string was be cut into many small
	 *       chunks, the returned value is the chunks number
	 *  REDIS_RESULT_ARRAY: children_->size()
	 */
	size_t result_size(void) const;

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵΪ REDIS_RESULT_INTEGER <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ض<EFBFBD>Ӧ<EFBFBD><EFBFBD> 32 λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ;
	 * get 32-bits number value if result type is REDIS_RESULT_INTERGER
	 * @param success {bool*} <EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> NULL ʱ<EFBFBD><EFBFBD>¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>ɹ<EFBFBD>;
	 *  if the param pointer is not NULL, which will save status of
	 *  success or not for result from redis-server
	 * @return {int}
	 */
	int result_number(bool* success = NULL) const;

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵΪ REDIS_RESULT_INTEGER <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ض<EFBFBD>Ӧ<EFBFBD><EFBFBD> 64 λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ;
	 * get 64-bits number value if result type is REDIS_RESULT_INTERGER
	 * @param success {bool*} <EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> NULL ʱ<EFBFBD><EFBFBD>¼<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>ɹ<EFBFBD>;
	 *  if the param pointer is not NULL, which will save status of
	 *  success or not for result from redis-server
	 * @return {long long int}
	 */
	long long int result_number64(bool* success = NULL) const;

	/**
	 * <EFBFBD><EFBFBD><EFBFBD>ض<EFBFBD>Ӧ<EFBFBD>±<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>(<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͷ<EFBFBD> REDIS_RESULT_ARRAY ʱ<EFBFBD><EFBFBD>;
	 * get string result when result type isn't REDIS_RESULT_ARRAY
	 * @param i {size_t} <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>±<EFBFBD>;
	 *  the array index
	 * @param len {size_t*} <EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD> NULL ָ<EFBFBD><EFBFBD>ʱ<EFBFBD>洢<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵij<EFBFBD><EFBFBD><EFBFBD>;
	 *  *len will save the result's length if len is not NULL
	 * @return {const char*} <EFBFBD><EFBFBD><EFBFBD><EFBFBD> NULL <EFBFBD><EFBFBD>ʾ<EFBFBD>±<EFBFBD>Խ<EFBFBD><EFBFBD>;
	 *  NULL will return if i beyonds the array's size
	 */
	const char* get_result(size_t i, size_t* len = NULL) const;

	/**
	 * <EFBFBD>жϵ<EFBFBD>ǰ<EFBFBD><EFBFBD><EFBFBD>󶨵<EFBFBD> redis <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>(redis_client) <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>Ѿ<EFBFBD><EFBFBD>رգ<EFBFBD>
	 * ֻ<EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD> conn_ <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǿ<EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ô˺<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
	 * to judge if the redis connection was be closed, only redis_client
	 * object be set internal
	 * @return {bool}
	 */
	bool eof(void) const;

	/**
	 * <EFBFBD><EFBFBD><EFBFBD>ñ<EFBFBD><EFBFBD><EFBFBD> redis <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̵Ľ<EFBFBD><EFBFBD><EFBFBD>;
	 * get result object of last redis operation
	 * @return {redis_result*}
	 */
	const redis_result* get_result(void) const;

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѯ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ñ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ԫ<EFBFBD>ض<EFBFBD><EFBFBD><EFBFBD>;
	 * get one result ojbect of array if result type is REDIS_RESULT_ARRAY
	 * @param i {size_t} <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>±<EFBFBD>ֵ;
	 *  the result array's index
	 * @return {const redis_result*} <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD>ջ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ
	 *  <EFBFBD>÷<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> NULL;
	 *  NULL will be resturned when result is not REDIS_RESULT_ARRAY or
	 *  array empty or error
	 */
	const redis_result* result_child(size_t i) const;

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD> redis-server <EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>͵Ľ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD><EFBFBD><EFBFBD>
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ij<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>±<EFBFBD>λ<EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>;
	 * when the reply from redis-serveer are strings array, this
	 * function can be used to get the string specified by a subscript
	 * @param i {size_t} <EFBFBD>±꣨<EFBFBD><EFBFBD> 0 <EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>
	 *  the subscript of strings array
	 * @param len {size_t*} <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ǿգ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>洢<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ؽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ij<EFBFBD><EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 *  <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>طǿ<EFBFBD>ָ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>Ч<EFBFBD><EFBFBD>
	 *  if len not a NULL pointer, it will store the length of string
	 *  specified by the subscript
	 * @return {const char*} <EFBFBD><EFBFBD><EFBFBD>ض<EFBFBD>Ӧ<EFBFBD>±<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> NULL ʱ<EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD>±<EFBFBD>û
	 *  <EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD>Ϊ<EFBFBD>˱<EFBFBD>֤ʹ<EFBFBD><EFBFBD><EFBFBD>ϵİ<EFBFBD>ȫ<EFBFBD>ԣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܱ<EFBFBD>֤<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> \0 <EFBFBD><EFBFBD>β<EFBFBD><EFBFBD>
	 *  <EFBFBD>ڼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݳ<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ý<EFBFBD>β<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD>˼<EFBFBD><EFBFBD>ݶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Σ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>߻<EFBFBD><EFBFBD><EFBFBD>
	 *  Ӧ<EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD> len <EFBFBD><EFBFBD><EFBFBD>ŵij<EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 *  the string will be returned associate with the subscript, if there
	 *  are nothing with the subscript, NULL will be returned
	 */
	const char* result_value(size_t i, size_t* len = NULL) const;

	/////////////////////////////////////////////////////////////////////
	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݽ<EFBFBD><EFBFBD>з<EFBFBD>Ƭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ true <EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>װ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Э<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * ʱ<EFBFBD>򲻻Ὣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>װ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD>
	 * 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} <EFBFBD>ڲ<EFBFBD>Ĭ<EFBFBD><EFBFBD>ֵΪ false
	 *  if true the request data will not be combined one package,
	 *  internal default is false
	 */
	void set_slice_request(bool on);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ݽ<EFBFBD><EFBFBD>з<EFBFBD>Ƭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ true <EFBFBD>򵱷<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * <EFBFBD>Ƚϴ<EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݽ<EFBFBD><EFBFBD>з<EFBFBD>Ƭ<EFBFBD><EFBFBD><EFBFBD>ֳ<EFBFBD>һЩ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD>
	 * just for response package, settint flag for receiving data
	 * if split the large response data into multi little chunks
	 * @param on {bool} <EFBFBD>ڲ<EFBFBD>Ĭ<EFBFBD><EFBFBD>ֵΪ false
	 *  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.
	 *  internal default is false
	 */
	void set_slice_respond(bool on);

public:
	/**
	 * ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> redis Э<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> redis <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ý<EFBFBD><EFBFBD><EFBFBD>
	 * @param argc {size_t} <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ԫ<EFBFBD>ظ<EFBFBD><EFBFBD><EFBFBD>
	 * @param argv {const char*[]} redis <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * @param lens {size_t[]} argv <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ԫ<EFBFBD>صij<EFBFBD><EFBFBD><EFBFBD>
	 * @param nchild {size_t} <EFBFBD>е<EFBFBD> redis <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>磺subop
	 * @return {const redis_result*} <EFBFBD><EFBFBD><EFBFBD>صĽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 */
	const redis_result* request(size_t argc, const char* argv[],
		size_t lens[], size_t nchild = 0);

	/**
	 * ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> redis Э<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> redis <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ý<EFBFBD><EFBFBD><EFBFBD>
	 * @param args {const std::vector<string>&} redis <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * @param nchild {size_t} <EFBFBD>е<EFBFBD> redis <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ȡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>磺subop
	 * @return {const redis_result*} <EFBFBD><EFBFBD><EFBFBD>صĽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 */
	const redis_result* request(const std::vector<string>& args,
		size_t nchild = 0);

	const string* request_buf(void) const
	{
		return request_buf_;
	}

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> redis <EFBFBD><EFBFBD><EFBFBD><EFBFBD>Э<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * @param argc {size_t} <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * @param argv {const char* []} <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * @param lens {size_t []} ÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * @param out {string&} <EFBFBD><EFBFBD><EFBFBD>Ŵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 */
	static void build_request(size_t argc, const char* argv[],
		size_t lens[], string& out);

	/**
	 * <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> redis <EFBFBD><EFBFBD><EFBFBD><EFBFBD>Э<EFBFBD>鲢<EFBFBD>洢<EFBFBD><EFBFBD> redis_command <EFBFBD>У<EFBFBD><EFBFBD>Ա<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱʹ<EFBFBD><EFBFBD>
	 * @param argc {size_t} <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * @param argv {const char* []} <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 * @param lens {size_t []} ÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	 */
	void build_request(size_t argc, const char* argv[], size_t lens[]);

protected:
	const redis_result* run(size_t nchild = 0, int* timeout = NULL);

	void clear_request(void);
	const redis_result** scan_keys(const char* cmd, const char* key,
		int& cursor, size_t& size, const char* pattern,
		const size_t* count);
	const redis_result** scan_keys(const char* cmd, const char* key,
		size_t klen, int& cursor, size_t& size, const char* pattern,
		const size_t* count);

	/*******************************************************************/

	void build(const char* cmd, const char* key,
		const std::map<string, string>& attrs);
	void build(const char* cmd, const char* key, size_t klen,
		const std::map<string, string>& attrs);
	void build(const char* cmd, const char* key,
		const std::map<string, const char*>& attrs);

	void build(const char* cmd, const char* key,
		const std::vector<string>& names,
		const std::vector<string>& values);
	void build(const char* cmd, const char* key, size_t klen,
		const std::vector<string>& names,
		const std::vector<string>& values);
	void build(const char* cmd, const char* key,
		const std::vector<const char*>& names,
		const std::vector<const char*>& values);

	void build(const char* cmd, const char* key,
		const char* names[], const char* values[], size_t argc);
	void build(const char* cmd, const char* key,
		const int names[], const char* values[], size_t argc);
	void build(const char* cmd, const char* key,
		const char* names[], const size_t names_len[],
		const char* values[], const size_t values_len[], size_t argc);
	void build(const char* cmd, const char* key, size_t klen,
		const char* names[], const size_t names_len[],
		const char* values[], const size_t values_len[], size_t argc);

	/*******************************************************************/

	void build(const char* cmd, const char* key,
		const std::vector<string>& names);
	void build(const char* cmd, const char* key, size_t klen,
		const std::vector<string>& names);
	void build(const char* cmd, const char* key,
		const std::vector<const char*>& names);
	void build(const char* cmd, const char* key,
		const std::vector<int>& names);

	void build(const char* cmd, const char* key,
		const char* names[], size_t argc);
	void build(const char* cmd, const char* key,
		const char* names[], const size_t lens[], size_t argc);
	void build(const char* cmd, const char* key, size_t klen,
		const char* names[], const size_t lens[], size_t argc);
	void build(const char* cmd, const char* key,
		const int names[], size_t argc);

	/*******************************************************************/

protected:
	int get_number(bool* success = NULL);
	long long int get_number64(bool* success = NULL);
	int get_number(std::vector<int>& out);
	int get_number64(std::vector<long long int>& out);
	bool check_status(const char* success = "OK");

	int get_status(std::vector<bool>& out);
	const char* get_status(void);

	int get_string(string& buf);
	int get_string(string* buf);
	int get_string(char* buf, size_t size);
	int get_strings(std::vector<string>& result);
	int get_strings(std::vector<string>* result);
	int get_strings(std::list<string>& result);
	int get_strings(std::list<string>* result);
	int get_strings(std::map<string, string>& result);
	int get_strings(std::vector<string>& names,
		std::vector<string>& values);
	int get_strings(std::vector<const char*>& names,
		std::vector<const char*>& values);

	/************************** common *********************************/
protected:
	dbuf_pool* dbuf_;

private:
	void init(void);

public:
	// compute hash slot of the given key and store it in the current
	// redis command will be used in the next operation for redis cluster.
	void hash_slot(const char* key);
	void hash_slot(const char* key, size_t len);

	// get the current hash slot stored internal
	int get_slot(void) const {
		return slot_;
	}

	bool is_check_addr(void) const {
		return check_addr_;
	}

protected:
	bool check_addr_;
	char addr_[32];
	redis_client* conn_;
	redis_client_cluster* cluster_;
	redis_client_pipeline* pipeline_;
	bool pipe_use_mbox_;
	int  slot_;
	int  redirect_max_;
	int  redirect_sleep_;

public:
	const char* get_addr(const char* info);
	void set_client_addr(const char* addr);
	void set_client_addr(redis_client& conn);

public:
	redis_request* get_request_obj(void) const {
		return request_obj_;
	}

	string* get_request_buf(void) const {
		return request_buf_;
	}

	bool is_slice_req(void) const {
		return slice_req_;
	}

	// get pipeline message bound with the current command
	redis_pipeline_message& get_pipeline_message(void);

protected:
	/************************** request ********************************/
	bool slice_req_;
	string* request_buf_;
	redis_request* request_obj_;
	size_t  argv_size_;
	const char**  argv_;
	size_t* argv_lens_;
	size_t  argc_;

	// reserve the argv space with the specified value at least
	void argv_space(size_t n);

	// build request in one request buffer
	void build_request1(size_t argc, const char* argv[], size_t lens[]);

	// build request with slice request obj
	void build_request2(size_t argc, const char* argv[], size_t lens[]);

protected:
	/************************** respond ********************************/
	bool slice_res_;
	redis_pipeline_message* pipe_msg_;
	const redis_result* result_;

	// save the error info into log
	void logger_result(const redis_result* result);
};

} // namespace acl

#endif // !defined(ACL_CLIENT_ONLY) && !defined(ACL_REDIS_DISABLE)