mirror of
https://gitee.com/acl-dev/acl.git
synced 2024-12-14 00:40:55 +08:00
355 lines
14 KiB
C++
355 lines
14 KiB
C++
#pragma once
|
||
#include "acl_cpp/acl_cpp_define.hpp"
|
||
#include <map>
|
||
#include <vector>
|
||
#include "acl_cpp/stdlib/string.hpp"
|
||
#include "acl_cpp/redis/redis_command.hpp"
|
||
|
||
namespace acl
|
||
{
|
||
|
||
class redis_client;
|
||
class redis_result;
|
||
|
||
/**
|
||
* redis Hash(哈希表) 类，本类的实现的主要命令：
|
||
* redis Hash class, include commands as below:
|
||
* HDEL/HEXISTS/HGET/HGETALL/HINCRBY/HINCRBYFLOAT/HKEYS/HLEN/HMGET/HMSET
|
||
* HSET/HSETNX/HVALS/HSCAN
|
||
*/
|
||
class ACL_CPP_API redis_hash : virtual public redis_command
|
||
{
|
||
public:
|
||
/**
|
||
* see redis_command::redis_command()
|
||
*/
|
||
redis_hash(void);
|
||
|
||
/**
|
||
* see redis_command::redis_command(redis_client*)
|
||
*/
|
||
redis_hash(redis_client* conn);
|
||
|
||
/**
|
||
* see redis_command::redis_command(redis_client_cluster*, size_t)
|
||
*/
|
||
redis_hash(redis_client_cluster* cluster, size_t max_conns = 0);
|
||
|
||
virtual ~redis_hash(void);
|
||
|
||
/////////////////////////////////////////////////////////////////////
|
||
|
||
/**
|
||
* 将多个"域-值"对添加至 KEY 对应的哈希表中
|
||
* HMSET: set the key's multiple fileds in redis-server
|
||
* @param key {const char*} 哈希表 key 值
|
||
* the hash key for Hash class
|
||
* @param attrs {const std::map<acl::string, ...>&} the fileds in map
|
||
* @return {bool} 添加是否成功
|
||
* if successful for HMSET command
|
||
*/
|
||
bool hmset(const char* key, const std::map<string, string>& attrs);
|
||
bool hmset(const char* key, const std::map<string, const char*>& attrs);
|
||
|
||
/////////////////////////////////////////////////////////////////////
|
||
|
||
/**
|
||
* 根据 KEY 值将多个"域-值"对从哈希表中取出
|
||
* get the values associated with the specified fields
|
||
* in the hash stored at key
|
||
* @param key {const char*} 哈希表 key 值
|
||
* the hash key
|
||
* @param names 对应 key 的域值对
|
||
* the given hash fileds
|
||
* @param result {std::vector<acl::string>*} 当该对象指针非空时存储查询结果；
|
||
* 如果该参数为 NULL 时，则可以通过基类 result_/get_ 获得数据
|
||
* store the result of the given hash files if not NULL.
|
||
* If NULL, the base class's method like result_/get can be used
|
||
* to get the values
|
||
* @return {bool} 操作是否成功，操作成功后可以通过以下任一种方式获得数据：
|
||
* if successul, one of below ways can be used to get the result:
|
||
*
|
||
* 1、在调用方法中传入非空的存储结果对象的地址
|
||
* input the no-NULL result parameter when call hmget, when
|
||
* success, the result will store the values of the given fileds
|
||
*
|
||
* 2、基类方法 result_value 获得指定下标的元素数据
|
||
* call redis_command::result_value with the specified subscript
|
||
*
|
||
* 3、基类方法 result_child 获得指定下标的元素对象(redis_result），然后再通过
|
||
* redis_result::argv_to_string 方法获得元素数据
|
||
* call redis_command::result_child with specified subscript to
|
||
* get redis_result object, then call redis_result::argv_to_string
|
||
* with above result to get the values of the give fileds
|
||
*
|
||
* 4、基类方法 get_result 方法取得总结果集对象 redis_result，然后再通过
|
||
* redis_result::get_child 获得一个元素对象，然后再通过方式 2 中指定
|
||
* 的方法获得该元素的数据
|
||
* call redis_command::get_result with the specified subscript to
|
||
* get redis_result object, and use redis_result::get_child to
|
||
* get one result object, then call redis_result::argv_to_string
|
||
* to get the value of one filed.
|
||
*
|
||
* 5、基类方法 get_children 获得结果元素数组对象，再通过 redis_result 中
|
||
* 的方法 argv_to_string 从每一个元素对象中获得元素数据
|
||
* use redis_command::get_children to get the redis_result array,
|
||
* then use redis_result::argv_to_string to get every value of
|
||
* the given fileds
|
||
*/
|
||
bool hmget(const char* key, const std::vector<string>& names,
|
||
std::vector<string>* result = NULL);
|
||
bool hmget(const char* key, const std::vector<const char*>& names,
|
||
std::vector<string>* result = NULL);
|
||
|
||
bool hmget(const char* key, const char* names[], size_t argc,
|
||
std::vector<string>* result = NULL);
|
||
bool hmget(const char* key, const char* names[], const size_t lens[],
|
||
size_t argc, std::vector<string>* result = NULL);
|
||
|
||
/////////////////////////////////////////////////////////////////////
|
||
|
||
/**
|
||
* 设置 key 对象中某个域字段的值
|
||
* set one field's value in the hash stored at key.
|
||
* @param key {const char*} key 键值
|
||
* the hash key
|
||
* @param name {const char*} key 对象的域名称
|
||
* the filed name of the hash key
|
||
* @param value {const char*} key 对象的域值
|
||
* the filed value of the hash key
|
||
* @return {int} 返回值含义：
|
||
* 1 -- 表示新添加的域字段添加成功
|
||
* 0 -- 表示更新已经存在的域字段成功
|
||
* -1 -- 表示出错或该 key 对象非哈希对象或从结点禁止修改
|
||
* return int value as below:
|
||
* 1 -- this is a new filed and set ok
|
||
* 0 -- thie is a old filed and set ok
|
||
* -1 -- error happend or the key is not a Hash type
|
||
*/
|
||
int hset(const char* key, const char* name, const char* value);
|
||
int hset(const char* key, const char* name,
|
||
const char* value, size_t value_len);
|
||
int hset(const char* key, const char* name, size_t name_len,
|
||
const char* value, size_t value_len);
|
||
|
||
/**
|
||
* 当且仅当 key 对象中的某个域字段不存在时才更新该域字段值
|
||
* set one new field of one key in hash only when the filed isn't
|
||
* existing.
|
||
* @param key {const char*} key 键值
|
||
* the hash key
|
||
* @param name {const char*} key 对象的域名称
|
||
* the field name
|
||
* @param value {const char*} key 对象的域值
|
||
* the field value
|
||
* @return {int} 返回值含义：
|
||
* 1 -- 表示新添加的域字段添加成功
|
||
* 0 -- 该域字段存在且未对其进行更新
|
||
* -1 -- 表示出错或该 key 对象非哈希对象或从结点禁止修改
|
||
*
|
||
* return int value as below:
|
||
* 1 -- this is a new filed and set ok
|
||
* 0 -- thie is a old filed and not set
|
||
* -1 -- error happend or the key is not a Hash type
|
||
*/
|
||
int hsetnx(const char* key, const char* name, const char* value);
|
||
int hsetnx(const char* key, const char* name,
|
||
const char* value, size_t value_len);
|
||
int hsetnx(const char* key, const char* name, size_t name_len,
|
||
const char* value, size_t value_len);
|
||
|
||
/**
|
||
* 从 redis 哈希表中获取某个 key 对象的某个域的值
|
||
* get the value assosiated with field in the hash stored at key
|
||
* @param key {const char*} key 键值
|
||
* the hash key
|
||
* @param name {const char*} key 对象的域字段名称
|
||
* the field's name
|
||
* @param result {acl::string&} 存储查询结果值(内部对该 string 进行内容追加)
|
||
* store the value result of the given field
|
||
* @return {bool} 返回值含义：
|
||
* true -- 操作成功，当result为空时表示 KEY 或字段域不存在
|
||
* get the value associated with field; if result is empty then
|
||
* the key or the name field doesn't exist
|
||
* false -- 域字段不存在或操作失败或该 key 对象非哈希对象
|
||
* the field not exists, or error happened,
|
||
* or the key isn't a hash key
|
||
*/
|
||
bool hget(const char* key, const char* name, string& result);
|
||
bool hget(const char* key, const char* name,
|
||
size_t name_len, string& result);
|
||
|
||
/**
|
||
* 从 redis 哈希表中获取某个 key 对象的所有域字段的值
|
||
* get all the fields and values in hash stored at key
|
||
* @param key {const char*} key 键值
|
||
* the hash key
|
||
* @param result {std::map<string, string>&} 存储域字段名-值查询结果集
|
||
* store the result of all the fileds and values
|
||
* @return {bool} 操作是否成功，含义：
|
||
* if ok, show below:
|
||
* true -- 操作成功，当该域不存在时也返回成功，需要检查 result 内容是否变化，
|
||
* 比如可以通过检查 result.size() 的变化来表明是否查询到结果
|
||
* successful if the key is a hash key or the key not exists
|
||
* false -- 操作失败或该 key 对象非哈希对象
|
||
* error happened or the key isn't a hash key
|
||
*/
|
||
bool hgetall(const char* key, std::map<string, string>& result);
|
||
bool hgetall(const char* key, std::vector<string>& names,
|
||
std::vector<string>& values);
|
||
bool hgetall(const char* key, std::vector<const char*>& names,
|
||
std::vector<const char*>& values);
|
||
|
||
/**
|
||
* 从 redis 哈希表中删除某个 key 对象的某些域字段
|
||
* remove one or more fields from hash stored at key
|
||
* @param key {const char*} key 键值
|
||
* the hash key
|
||
* @param first_name {const char*} 第一个域字段名，最后一个字段必须是 NULL
|
||
* the first field of the fields list, the last field must be NULL
|
||
* indicating the end of vary parameters
|
||
* @return {int} 成功删除的域字段个数，返回 -1 表示出错或该 key 对象非哈希对象
|
||
* return the number of fields be removed successfully, or -1 when
|
||
* error happened or operating on a no hash key
|
||
*/
|
||
int hdel(const char* key, const char* first_name);
|
||
int hdel(const char* key, const char* names[], size_t argc);
|
||
int hdel(const char* key, const char* names[],
|
||
const size_t names_len[], size_t argc);
|
||
int hdel(const char* key, const std::vector<string>& names);
|
||
int hdel(const char* key, const std::vector<const char*>& names);
|
||
int hdel_fields(const char* key, const char* names[], size_t argc);
|
||
int hdel_fields(const char* key, const char* names[],
|
||
const size_t names_len[], size_t argc);
|
||
int hdel_fields(const char* key, const std::vector<string>& names);
|
||
int hdel_fields(const char* key, const std::vector<const char*>& names);
|
||
int hdel_fields(const char* key, const char* first_name, ...);
|
||
|
||
/**
|
||
* 当某个 key 对象中的某个域字段为整数时，对其进行加减操作
|
||
* inc(+n) or dec(-n) on a integer filed in hash stored at key
|
||
* @param key {const char*} key 键值
|
||
* the hash key
|
||
* @param name {const char*} key 对象的域字段名称
|
||
* the filed name of integer type
|
||
* @param inc {long long int} 增加的值，可以为负值
|
||
* the integer value to be inc or dec on the field's value
|
||
* @param result {long long int*} 非 NULL 时存储结果值
|
||
* store the result if non-NULL
|
||
* @return {bool} 操作是否成功，当返回 false 时表明出错或该 key 对象非哈希
|
||
* 对象或该域字段非整数类型
|
||
* if successful: false when error, not a hash, or the field isn't
|
||
* integer type
|
||
*/
|
||
bool hincrby(const char* key, const char* name,
|
||
long long int inc, long long int* result = NULL);
|
||
|
||
/**
|
||
* 当某个 key 对象中的某个域字段为浮点数时，对其进行加减操作
|
||
* inc(+n) or dec(-n) on a float filed in hash stored at key
|
||
* @param key {const char*} key 键值
|
||
* the hash key
|
||
* @param name {const char*} key 对象的域字段名称
|
||
* the filed name of float type
|
||
* @param inc {double} 增加的值，可以为负值
|
||
* the float value to be inc or dec on the field's value
|
||
* @param result {double*} 非 NULL 时存储结果值
|
||
* store the result if non-NULL
|
||
* @return {bool} 操作是否成功，当返回 false 时表明出错或该 key 对象非哈希
|
||
* 对象或该域字段非浮点数类型
|
||
* if successful: false when error, not a hash, or the field isn't
|
||
* float type
|
||
*/
|
||
bool hincrbyfloat(const char* key, const char* name,
|
||
double inc, double* result = NULL);
|
||
|
||
/**
|
||
* 返回 key 对象中所有域字段名称
|
||
* get all the fields in hash stored at key
|
||
* @param key {const char*} key 键值
|
||
* the hash key
|
||
* @param names {std::vector<string>&} 存储该 key 对象所有域字段名称
|
||
* store all the names of all fileds
|
||
* @return {bool} 操作是否成功，返回 false 表明出错或该 key 对象非哈希对象
|
||
* return true on success, false if error happened or the
|
||
* key wasn't a hash key
|
||
*/
|
||
bool hkeys(const char* key, std::vector<string>& names);
|
||
|
||
/**
|
||
* 检查 key 对象中某个域字段是否存在
|
||
* check if the field exists in hash stored at key
|
||
* @param key {const char*} key 键值
|
||
* the hash key
|
||
* @param name {const char*} key 对象的域字段名称
|
||
* the filed's name of the key
|
||
* @return {bool} 操作是否成功，返回 false 表明出错或该 key 对象非哈希对象
|
||
* 或该域字段不存在
|
||
* return true on success, false if error happened or the
|
||
* key wasn't a hash key
|
||
*/
|
||
bool hexists(const char* key, const char* name);
|
||
bool hexists(const char* key, const char* name, size_t name_len);
|
||
|
||
/**
|
||
* 获得某个 key 对象中所有域字段的数量
|
||
* get the count of fields in hash stored at key
|
||
* @param key {const char*} key 键值
|
||
* the hash key
|
||
* @return {int} 返回值含义：
|
||
* return int value as below:
|
||
* -1 -- 出错或该 key 对象非哈希对象
|
||
* error or not a hash key
|
||
* >0 -- 域字段数量
|
||
* the count of fields
|
||
* 0 -- 该 key 不存在或域字段数量为 0
|
||
* key not exists or no fields in hash stored at key
|
||
*/
|
||
int hlen(const char* key);
|
||
|
||
/**
|
||
* 获得某个 key 中的指定域的数据长度
|
||
* Returns the string length of the value associated with field
|
||
* in the hash stored at key
|
||
* @param key {const char*} key 键值
|
||
* the hash key
|
||
* @param name {const char*} key 对象的域字段名称
|
||
* the field's name
|
||
* @return {int} 如果 key 或 name 不存在，则返回 0，如果 key 非哈希
|
||
* 键或出错，则返回 -1
|
||
* If the key or the field do not exist, 0 is returned; If the key is
|
||
* not the hash key or error happened, -1 is returned.
|
||
*/
|
||
int hstrlen(const char* key, const char* name, size_t name_len);
|
||
int hstrlen(const char* key, const char *name);
|
||
|
||
/**
|
||
* 命令用于迭代哈希键中的键值对
|
||
* scan the name and value of all fields in hash stored at key
|
||
* @param key {const char*} 哈希键值
|
||
* the hash key
|
||
* @param cursor {int} 游标值，开始遍历时该值写 0
|
||
* the cursor value, which is 0 at begin
|
||
* @param out {std::map<acl::string>&} 存储结果集，内部以追加方式将本次
|
||
* 遍历结果添加进该对象中，为防止因总结果集过大导致该数组溢出，用户可在
|
||
* 调用本函数前后清理该对象
|
||
* store scaning result in appending mode
|
||
* @param pattern {const char*} 匹配模式，glob 风格，非空时有效
|
||
* match pattern, effective only on no-NULL
|
||
* @param count {const size_t*} 限定的结果集数量，非空指针时有效
|
||
* the max count of one scan process, effective only on no-NULL
|
||
* @return {int} 下一个游标位置，含义如下：
|
||
* return the next cursor position, as below:
|
||
* 0：遍历结束
|
||
* scan finish
|
||
* -1: 出错
|
||
* some error happened
|
||
* >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
|
||
* the next cursor postion to scan
|
||
*/
|
||
int hscan(const char* key, int cursor, std::map<string, string>& out,
|
||
const char* pattern = NULL, const size_t* count = NULL);
|
||
};
|
||
|
||
} // namespace acl
|