Struct SequentialReadPolicy 

pub struct SequentialReadPolicy;

Sequential read policy: Try L1 first, then L2 on miss.

This is the default and most common strategy. It provides:

• Fast reads from L1 when available
• Fallback to L2 if L1 misses or fails
• Graceful degradation if L1 fails

Behavior

1. Call read_l1(key)
   • Hit: Return immediately with L1 context
   • Miss or Error: Continue to L2
2. Call read_l2(key)
   • Hit: Return value with L2 context (L2 closure handles any L1 population)
   • Miss: Return None
   • Error: Return error

Note

The closures passed to execute_with are responsible for any post-processing like L1 population or envelope wrapping. This keeps the policy focused purely on the control flow strategy.

Implementations

impl SequentialReadPolicy

pub fn new() -> Self

Create a new sequential read policy.

Trait Implementations

impl Clone for SequentialReadPolicy

fn clone(&self) -> SequentialReadPolicy

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl CompositionReadPolicy for SequentialReadPolicy

fn execute_with<'life0, 'life1, 'async_trait, T, E, F1, F2, Fut1, Fut2, O>( &'life0 self, key: CacheKey, read_l1: F1, read_l2: F2, _offload: &'life1 O, ) -> Pin<Box<dyn Future<Output = Result<ReadResult<T>, E>> + Send + 'async_trait>>

where T: Send + 'static + 'async_trait, E: Send + Debug + 'static + 'async_trait, F1: FnOnce(CacheKey) -> Fut1 + Send + 'async_trait, F2: FnOnce(CacheKey) -> Fut2 + Send + 'async_trait, Fut1: Future<Output = (Result<Option<CacheValue<T>>, E>, BoxContext)> + Send + 'static + 'async_trait, Fut2: Future<Output = (Result<Option<CacheValue<T>>, E>, BoxContext)> + Send + 'static + 'async_trait, O: Offload<'static> + 'async_trait, Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Execute a read operation with custom read closures for each layer.

impl Debug for SequentialReadPolicy

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

Formats the value using the given formatter.

impl Default for SequentialReadPolicy

fn default() -> SequentialReadPolicy

Returns the “default value” for a type.

impl Copy for SequentialReadPolicy