Struct Cache

pub struct Cache { /* private fields */ }

A cache used to skip unnecessary network requests.

Implementations

impl Cache

pub fn new() -> Self

Create a new, empty Cache.

pub fn lookup(&self, url: &Url) -> Option<&CacheEntry>

Lookup a particular CacheEntry.

pub fn insert(&mut self, url: Url, entry: CacheEntry)

Add a new CacheEntry to the cache.

pub fn url_is_still_valid(&self, url: &Url, timeout: Duration) -> bool

Ask the Cache whether a particular Url is still okay (i.e. CacheEntry::valid is true).

pub fn iter(&self) -> impl Iterator<Item = (&Url, &CacheEntry)> + '_

Iterate over all known CacheEntries, regardless of whether they are stale or invalid.

pub fn clear(&mut self)

Forget all CacheEntries.

Trait Implementations

impl Clone for Cache

fn clone(&self) -> Cache

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Cache

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

Formats the value using the given formatter.

impl Default for Cache

fn default() -> Cache

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Cache

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Extend<(Url, CacheEntry)> for Cache

fn extend<T: IntoIterator<Item = (Url, CacheEntry)>>(&mut self, iter: T)

Extends a collection with the contents of an iterator.

fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements.

impl PartialEq for Cache

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Cache

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Cache