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RedisBackend

Struct RedisBackend 

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pub struct RedisBackend { /* private fields */ }
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Redis 分布式缓存后端(stub,未启用 redis feature 时使用)

当未启用 redis feature 时,所有操作返回 CacheError::Internal, 提示用户在 Cargo.toml 中启用 redis feature。

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impl RedisBackend

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pub fn new(_url: impl Into<String>) -> RedisBackend

创建 Redis 后端 stub

返回 stub 实例,所有操作将返回 CacheError::Internal。 启用 redis feature 后自动切换为真实实现。

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impl L2CacheBackend for RedisBackend

Available on non-crate feature redis only.
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fn get<'a>( &'a self, _key: &'a str, ) -> Pin<Box<dyn Future<Output = Result<Option<Vec<u8>>, CacheError>> + Send + 'a>>

获取缓存值,不存在或已过期返回 None
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fn set<'a>( &'a self, _key: &'a str, _value: &'a [u8], _ttl: Option<Duration>, ) -> Pin<Box<dyn Future<Output = Result<(), CacheError>> + Send + 'a>>

设置缓存值,ttlNone 表示永不过期
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fn delete<'a>( &'a self, _key: &'a str, ) -> Pin<Box<dyn Future<Output = Result<(), CacheError>> + Send + 'a>>

删除单个缓存键
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fn invalidate_prefix<'a>( &'a self, _prefix: &'a str, ) -> Pin<Box<dyn Future<Output = Result<(), CacheError>> + Send + 'a>>

按前缀批量失效缓存项(用于表级失效)

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