Struct TtlValue 

pub struct TtlValue<T> { /* private fields */ }

A value that expires after some time.

This value is (de)serializable so it can be persisted in a store.

Implementations

impl<T> TtlValue<T>

pub const STALE_THRESHOLD: f64

The number of milliseconds after which the data is considered stale.

This matches 1 day.

pub fn new(data: T) -> TtlValue<T>

Construct a new TtlValue with the given data.

pub fn without_expiry(data: T) -> TtlValue<T>

Construct a new TtlValue with the given data that never expires.

pub fn as_ref(&self) -> TtlValue<&T>

Converts from &TtlValue<T> to TtlValue<&T>.

pub fn map<U, F>(self, f: F) -> TtlValue<U>

where F: FnOnce(T) -> U,

Transform the data of this TtlValue with the given function.

pub fn has_expired(&self) -> bool

Whether this value has expired.

pub fn expire(&mut self)

Mark this value has expired.

pub fn data(&self) -> &T

Get a reference to the data of this value.

pub fn into_data(self) -> T

Get the data of this value.

Trait Implementations

impl<T> Clone for TtlValue<T>

where T: Clone,

fn clone(&self) -> TtlValue<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T> Debug for TtlValue<T>

where T: Debug,

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

Formats the value using the given formatter.

impl<'de, T> Deserialize<'de> for TtlValue<T>

where T: Deserialize<'de>,

fn deserialize<__D>( __deserializer: __D, ) -> Result<TtlValue<T>, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<T> Serialize for TtlValue<T>

where T: Serialize,

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

where __S: Serializer,

Serialize this value into the given Serde serializer.