Enum CacheLookup 

pub enum CacheLookup {
    Hit(CacheEntry),
    Miss,
    NoCachedData,
}

Variants

Hit(CacheEntry)

命中，直接返回（响应里 metadata.cacheState = "hit"）。

Miss

未命中，需要抓取；抓取后按 store_in_cache 决定是否写入。

NoCachedData

设置了 minAge 但没有合格的缓存：返回 404 SCRAPE_NO_CACHED_DATA，不要抓取。

Trait Implementations

impl Clone for CacheLookup

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CacheLookup

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

Formats the value using the given formatter.

impl Eq for CacheLookup

impl PartialEq for CacheLookup

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for CacheLookup