Trait RedisBackend 

pub trait RedisBackend: Send + Sync {
    // Required methods
    fn get(&self, key: &str) -> Result<Option<Vec<u8>>, CacheError>;
    fn set(&self, key: &str, value: Vec<u8>) -> Result<(), CacheError>;
    fn set_ex(
        &self,
        key: &str,
        value: Vec<u8>,
        ttl: Duration,
    ) -> Result<(), CacheError>;
    fn del(&self, key: &str) -> Result<i64, CacheError>;
    fn del_many(&self, keys: &[&str]) -> Result<i64, CacheError>;
    fn exists(&self, key: &str) -> Result<bool, CacheError>;
    fn incr_by(&self, key: &str, step: i64) -> Result<i64, CacheError>;
    fn decr_by(&self, key: &str, step: i64) -> Result<i64, CacheError>;
    fn flush_db(&self) -> Result<(), CacheError>;
    fn sadd(&self, key: &str, member: &str) -> Result<i64, CacheError>;
    fn smembers(&self, key: &str) -> Result<Vec<String>, CacheError>;
}

Redis 后端 trait（抽象 Redis 命令）

由于 Rust 端不强制依赖 redis crate，本 trait 抽象 Redis 命令， 允许应用层注入真实 Redis backend（如 redis::Connection 包装）。

默认实现

MockRedisBackend 用 HashMap 模拟 Redis 行为，用于测试和开发环境。

命令映射

Trait 方法	Redis 命令	PHP phpredis 调用
get	GET	$handler->get($key)
set	SET	$handler->set($key, $value)
set_ex	SETEX	$handler->setex($key, $ttl, $v)
del	DEL	$handler->del($key)
del_many	DEL …	$handler->del($keys)
exists	EXISTS	$handler->exists($key)
incr_by	INCRBY	$handler->incrby($key, $step)
decr_by	DECRBY	$handler->decrby($key, $step)
flush_db	FLUSHDB	$handler->flushDB()
sadd	SADD	$handler->sAdd($key, $value)
smembers	SMEMBERS	$handler->sMembers($key)

Required Methods

fn get(&self, key: &str) -> Result<Option<Vec<u8>>, CacheError>

GET 命令

fn set(&self, key: &str, value: Vec<u8>) -> Result<(), CacheError>

SET 命令（无 TTL）

fn set_ex( &self, key: &str, value: Vec<u8>, ttl: Duration, ) -> Result<(), CacheError>

SETEX 命令（带 TTL）

fn del(&self, key: &str) -> Result<i64, CacheError>

DEL 命令（单个 key），返回删除数量

fn del_many(&self, keys: &[&str]) -> Result<i64, CacheError>

DEL 命令（批量），返回删除数量

fn exists(&self, key: &str) -> Result<bool, CacheError>

EXISTS 命令

fn incr_by(&self, key: &str, step: i64) -> Result<i64, CacheError>

INCRBY 命令（key 不存在时 Redis 初始化为 0 再 INCRBY）

fn decr_by(&self, key: &str, step: i64) -> Result<i64, CacheError>

DECRBY 命令

fn flush_db(&self) -> Result<(), CacheError>

FLUSHDB 命令（清空当前 db）

fn sadd(&self, key: &str, member: &str) -> Result<i64, CacheError>

SADD 命令（向 Set 添加成员）

fn smembers(&self, key: &str) -> Result<Vec<String>, CacheError>

SMEMBERS 命令（返回 Set 全部成员）

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl RedisBackend for MockRedisBackend