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361 lines
15 KiB
C++
361 lines
15 KiB
C++
#pragma once
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#include "../acl_cpp_define.hpp"
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#include <vector>
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#include "../stdlib/string.hpp"
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#include "redis_command.hpp"
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#ifndef ACL_CLIENT_ONLY
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namespace acl
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{
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class redis_client;
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class ACL_CPP_API redis_set : virtual public redis_command
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{
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public:
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/**
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* see redis_command::redis_command()
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*/
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redis_set(void);
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/**
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* see redis_command::redis_command(redis_client*)
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*/
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redis_set(redis_client* conn);
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/**
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* see redis_command::redis_command(redis_client_cluster*, size_t)
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*/
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redis_set(redis_client_cluster* cluster, size_t max_conns = 0);
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virtual ~redis_set(void);
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/////////////////////////////////////////////////////////////////////
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/**
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* 将一个或多个 member 元素加入到集合 key 当中，已经存在于集合的 member 元素
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* 将被忽略;
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* 1) 假如 key 不存在，则创建一个只包含 member 元素作成员的集合
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* 2) 当 key 不是集合类型时，返回一个错误
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* add one or more members to a set stored at a key
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* 1) if the key doesn't exist, a new set by the key will be created,
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* and add the members to the set
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* 2) if the key exists and not a set's key, then error happened
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* @param key {const char*} 集合对象的键
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* the key of a set
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* @param first_member {const char*} 第一个非 NULL 的成员
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* the first member of a variable args which isn't NULL, the last
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* arg of the args must be NULL indicating the end of args
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* @return {int} 被添加到集合中的新元素的数量，不包括被忽略的元素
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* the number of elements that were added to the set, not including
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* all the elements already present into the set. -1 if error
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* happened or it isn't a set stored by the key.
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*/
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int sadd(const char* key, const char* first_member, ...);
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int sadd(const char* key, const std::vector<const char*>& memsbers);
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int sadd(const char* key, const std::vector<string>& members);
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int sadd(const char* key, const char* argv[], size_t argc);
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int sadd(const char* key, const char* argv[], const size_t lens[],
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size_t argc);
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/**
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* 从集合对象中随机移除并返回某个成员
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* remove and get one member from the set
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* @param key {const char*} 集合对象的键
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* the key of the set
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* @param buf {string&} 存储被移除的成员
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* store the member removed from the set
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* @return {bool} 当 key 不存在或 key 是空集时返回 false
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* true if one member has been removed and got, false if the key
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* doesn't exist or it isn't a set stored at the key.
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*/
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bool spop(const char* key, string& buf);
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/**
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* 获得集合对象中成员的数量
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* get the number of members in a set stored at the key
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* @param key {const char*} 集合对象的键
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* the key of the set
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* @return {int} 返回该集合对象中成员数量，含义如下：
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* return int value as below:
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* -1：出错或非集合对象
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* error or it's not a set by the key
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* 0：成员数量为空或该 key 不存在
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* the set is empty or the key doesn't exist
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* >0：成员数量非空
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* the number of members in the set
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*/
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int scard(const char* key);
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/**
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* 返回集合 key 中的所有成员
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* get all the members in a set stored at a key
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* @param key {const char*} 集合对象的键值
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* the key of the set
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* @param members {std::vector<string>*} 非空时存储结果集
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* if not NULL, it will store the members.
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* @return {int} 结果集数量，返回 -1 表示出错或有一个 key 非集合对象
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* the number of elements got, -1 if error happened or it't not
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* a set by the key.
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*
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* 操作成功后可以通过以下任一方式获得数据
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* if successul, one of below ways can be used to get the result:
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* 1、在调用方法中传入非空的存储结果对象的地址
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* the most easily way is to set a non-NULL result parameter
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* for this function
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* 2、基类方法 get_value 获得指定下标的元素数据
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* call redis_command::result_value with the specified subscript
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* 3、基类方法 get_child 获得指定下标的元素对象(redis_result），然后再通过
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* redis_result::argv_to_string 方法获得元素数据
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* get redis_result object with the given subscript, and get the
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* element by redis_result::argv_to_string
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* 4、基类方法 get_result 方法取得总结果集对象 redis_result，然后再通过
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* redis_result::get_child 获得一个元素对象，然后再通过方式 2 中指定
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* 的方法获得该元素的数据
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* get redis_result object by redis_command::get_result, and get
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* the first element by redis_result::get_child, then get the
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* element by the way same as the way 2 above
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* 5、基类方法 get_children 获得结果元素数组对象，再通过 redis_result 中
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* 的方法 argv_to_string 从每一个元素对象中获得元素数据
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* get child array by redis_command::get_children, and get the
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* element from one of redis_result array by argv_to_string
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*/
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int smembers(const char* key, std::vector<string>* members);
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/**
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* 将 member 元素从 src 集合移动到 dst 集合
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* move a member from one set to another
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* @param src {const char*} 源集合对象的键值
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* the source key of a set
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* @param dst {const char*} 目标集合对象的键值
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* the destination key of a set
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* @param member {const char*} 源集合对象的成员
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* the member in the source set
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* @return {int} 返回值含义如下：
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* return int value as below:
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* -1：出错或源/目标对象有一个非集合对象
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* error happened, or one of source and destination isn't a set
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* 0：源对象不存在或成员在源对象中不存在
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* the source set or the member doesn't exist
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* 1：成功从源对象中将一个成员移动至目标对象中
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* move successfully the member from source set to
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* the destination set
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*/
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int smove(const char* src, const char* dst, const char* member);
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int smove(const char* src, const char* dst, const string& member);
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int smove(const char* src, const char* dst,
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const char* member, size_t len);
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/**
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* 返回一个集合的全部成员，该集合是所有给定集合之间的差集
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* return the members of the set resulting from the difference
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* between the first set and all the successive sets.
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* @param members {std::vector<string>*} 非空时存储结果集
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* if not NULL, it will store the members.
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* @param first_key {const char*} 第一个非空的集合对象 key
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* the key of the first set in a variable sets list, the last one
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* must be NULL indicating the end of the sets list.
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* @return {int} 结果集数量，返回 -1 表示出错或有一个 key 非集合对象
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* the number of elements got, -1 if error happened or it't not
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* a set by the key.
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* 操作成功后可以通过以下任一方式获得数据
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* if successul, one of below ways can be used to get the result:
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* 1、在调用方法中传入非空的存储结果对象的地址
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* the most easily way is to set a non-NULL result parameter
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* for this function
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* 2、基类方法 get_value 获得指定下标的元素数据
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* get the specified subscript's element by redis_command::get_value
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* 3、基类方法 get_child 获得指定下标的元素对象(redis_result），然后再通过
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* redis_result::argv_to_string 方法获得元素数据
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* get redis_result object with the given subscript, and get the
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* element by redis_result::argv_to_string
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* 4、基类方法 get_result 方法取得总结果集对象 redis_result，然后再通过
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* redis_result::get_child 获得一个元素对象，然后再通过方式 2 中指定
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* 的方法获得该元素的数据
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* get redis_result object by redis_command::get_result, and get
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* the first element by redis_result::get_child, then get the
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* element by the way same as the way 2 above.
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* 5、基类方法 get_children 获得结果元素数组对象，再通过 redis_result 中
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* 的方法 argv_to_string 从每一个元素对象中获得元素数据
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* get child array by redis_command::get_children, and get the
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* element from one of redis_result array by argv_to_string
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*/
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int sdiff(std::vector<string>* members, const char* first_key, ...);
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int sdiff(const std::vector<const char*>& keys,
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std::vector<string>* members);
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int sdiff(const std::vector<string>& keys,
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std::vector<string>* members);
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/**
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* 返回一个集合的全部成员，该集合是所有给定集合的交集
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* return the members of a set resulting from the intersection of
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* all the give sets.
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* @param members {std::vector<string>*} 非空时存储结果集
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* if not NULL, it will store the result
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* @param first_key {const char*} 第一个集合对象 key（非NULL）
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* the key of the first set in a variable set list, which isn't NULL,
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* the last one must be NULL in the set list.
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* @return {int} 结果集数量，返回 -1 表示出错或有一个 key 非集合对象
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* return the number of the members, -1 if error happened or
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* it't not a set by the key.
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*/
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int sinter(std::vector<string>* members, const char* first_key, ...);
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int sinter(const std::vector<const char*>& keys,
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std::vector<string>* members);
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int sinter(const std::vector<string>& keys,
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std::vector<string>* members);
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/**
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* 返回一个集合的全部成员，该集合是所有给定集合的并集
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* return the members of a set resulting from the union of all the
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* given sets.
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* @param members {std::vector<string>*} 非空时存储结果集
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* if not NULL, it will store the result
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* @param first_key {const char*} 第一个集合对象 key（非NULL）
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* the key of the first set in a variable set list, which isn't NULL,
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* and the last arg must be NULL indicating the end of the set list.
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* @return {int} 结果集数量，返回 -1 表示出错或有一个 key 非集合对象
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* return the number of members, -1 if error happened or it's not
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* a set by the key.
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*/
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int sunion(std::vector<string>* members, const char* first_key, ...);
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int sunion(const std::vector<const char*>& keys,
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std::vector<string>* members);
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int sunion(const std::vector<string>& keys,
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std::vector<string>* members);
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/**
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* 这个命令的作用和 SDIFF 类似，但它将结果保存到 dst 集合，而不是简单地返回结果集
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* This command is equal to SDIFF, but instead of returning
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* the resulting set, it is stored in destination.
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* @param dst {const char*} 目标集合对象键值
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* the key of the destination set
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* @param first_key {const char*} 第一个非空的集合对象键值
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* the key of the first set in a variable set list, which isn't NULL,
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* and the last arg must be NULL indicating the end of the set list.
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* @return {int} 结果集中的成员数量
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* return the number of members, -1 if error happened or it's not
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* a set by the key.
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*/
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int sdiffstore(const char* dst, const char* first_key, ...);
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int sdiffstore(const char* dst, const std::vector<const char*>& keys);
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int sdiffstore(const char* dst, const std::vector<string>& keys);
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/**
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* 这个命令类似于 SINTER 命令，但它将结果保存到 dst 集合，而不是简单地返回结果集
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* This command is equal to SINTER, but instead of returning
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* the resulting set, it is stored in destination.
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* @param dst {const char*} 目标集合对象键值
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* the key of the destination set
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* @param first_key {const char*} 第一个非空的集合对象键值
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* the key of the first set in a variable set list, which isn't NULL,
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* and the last arg must be NULL indicating the end of the set list.
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* @return {int} 结果集中的成员数量
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* return the number of members, -1 if error happened or it's not
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* a set by the key.
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*/
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int sinterstore(const char* dst, const char* first_key, ...);
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int sinterstore(const char* dst, const std::vector<const char*>& keys);
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int sinterstore(const char* dst, const std::vector<string>& keys);
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/**
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* 这个命令类似于 SUNION 命令，但它将结果保存到 dst 集合，而不是简单地返回结果集
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* This command is equal to SUNION, but instead of returning
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* the resulting set, it is stored in destination.
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* @param dst {const char*} 目标集合对象键值
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* the key of the destination set
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* @param first_key {const char*} 第一个非空的集合对象键值
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* the key of the first set in a variable set list, which isn't NULL,
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* and the last arg must be NULL indicating the end of the set list.
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* @return {int} 结果集中的成员数量
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* return the number of members, -1 if error happened or it's not
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* a set by the key.
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*/
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int sunionstore(const char* dst, const char* first_key, ...);
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int sunionstore(const char* dst, const std::vector<const char*>& keys);
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int sunionstore(const char* dst, const std::vector<string>& keys);
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/**
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* 判断 member 元素是否集合 key 的成员
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* determine if a given value is a member of a set
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* @param key {const char*} 集合对象的键值
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* the key of a set
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* @param member {const char*} 给定值
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* the given value
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* @return {bool} 返回 true 表示是，否则可能是因为不是或出错或该 key 对象
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* 非集合对象
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* true if the given is a member of the set, false if it's not a
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* member of the set, or error, or it's not a set by the key.
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*/
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bool sismember(const char* key, const char* member);
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bool sismember(const char* key, const char* member, size_t len);
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/**
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* 如果命令执行时，只提供了 key 参数，那么返回集合中的一个随机元素，如果还同时指定
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* 了元素个数，则会返回一个不超过该个数限制的结果集
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* get one or multiple memebers from a set
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* @param key {const char*} 集合对象的键值
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* the key of a set
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* @param out 存储结果或结果集
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* store the result
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* @return {int} 结果的个数，为 -1 表示出错，0 表示没有成员
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* the number of members, 0 if the set by the key is empty,
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* -1 if error happened.
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*/
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int srandmember(const char* key, string& out);
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int srandmember(const char* key, size_t n, std::vector<string>& out);
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/**
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* 移除集合 key 中的一个或多个 member 元素，不存在的 member 元素会被忽略
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* Remove the specified members from the set stored at key. if the
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* member doesn't exist, it will be ignored.
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* @param key {const char*} 集合对象的键值
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* the key of the set
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* @param first_member {const char*} 需要被移除的成员列表的第一个非 NULL成员，
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* 在变参的输入中需要将最后一个变参写 NULL
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* the first non-NULL member to be removed in a variable member list,
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* and the last one must be NULL indicating the end of the list.
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* @retur {int} 被移除的成员元素的个数，当出错或非集合对象时返回 -1；当 key 不
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* 存在或成员不存在时返回 0
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* the number of members be removed, 0 if the set is empty or the
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* key doesn't exist, -1 if error happened or it's not a set by key
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*/
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int srem(const char* key, const char* first_member, ...);
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int srem(const char* key, const std::vector<string>& members);
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int srem(const char* key, const std::vector<const char*>& members);
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int srem(const char* key, const char* members[],
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size_t lens[], size_t argc);
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/**
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* 命令用于迭代当前数据库中的数据库键
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* scan the members in a set stored at key
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* @param key {const char*} 哈希键值
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* the key of a set
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* @param cursor {int} 游标值，开始遍历时该值写 0
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* the cursor value, which is 0 at begin
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* @param out {std::vector<string>&} 存储结果集，内部以追加方式将本次遍历
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* 结果集合添加进该数组中，为防止因总结果集过大导致该数组溢出，用户可在调用本
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* 函数前后清理该数组对象
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* store result in appending mode.
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* @param pattern {const char*} 匹配模式，glob 风格，非空时有效
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* match pattern, effective only on no-NULL
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* @param count {const size_t*} 限定的结果集数量，非空指针时有效
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* the max count of one scan process, effective only on no-NULL
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* @return {int} 下一个游标位置，含义如下：
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* return the next cursor position, as below:
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* 0：遍历结束
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* scan finish
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* -1: 出错
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* some error happened
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* >0: 游标的下一个位置，即使这样，具体有多少结果还需要检查 out，因为有可能为空
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* the next cursor postion to scan
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*/
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int sscan(const char* key, int cursor, std::vector<string>& out,
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const char* pattern = NULL, const size_t* count = NULL);
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};
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} // namespace acl
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#endif // ACL_CLIENT_ONLY
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