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ListRouter

Struct ListRouter 

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pub struct ListRouter { /* private fields */ }
Expand description

List 策略路由器

按枚举值(如地区、租户、类型)显式映射到 shard。 支持默认 shard(fallback)。

§适用场景

  • 多租户:按 tenant_id 路由
  • 多地区:按 region 路由
  • 类型分库:按 type 字段路由

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impl ListRouter

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pub fn new() -> Self

创建空 List 路由器

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pub fn add(self, key: &str, shard: &str) -> Self

添加映射(链式 API)

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pub fn with_default(self, shard: &str) -> Self

设置默认 shard

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pub fn route(&self, key: &str) -> Result<String, EnhancedShardingError>

路由

§Errors

当 key 无匹配且无默认 shard 时返回 EnhancedShardingError::NoListMatch

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pub fn len(&self) -> usize

返回映射条目数

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pub fn is_empty(&self) -> bool

是否为空

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pub fn has_default(&self) -> bool

是否有默认 shard

Trait Implementations§

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impl Debug for ListRouter

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for ListRouter

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fn default() -> Self

Returns the “default value” for a type. Read more

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.