Struct Feed 

pub struct Feed<T> {
    pub data: Option<T>,
    pub fetched_at: Option<u64>,
    pub error: Option<Fail>,
    pub in_flight: Option<u64>,
    pub next_at: u64,
    pub failures: u32,
}

A thing read on a schedule: the last good value, the error of the last try, and when to try again. A failure keeps the value (it becomes stale) and backs off (×2 up to 30 s; Retry-After is obeyed).

Fields

data: Option<T>

fetched_at: Option<u64>

When the last good value arrived (ms since the app opened).

error: Option<Fail>

in_flight: Option<u64>

next_at: u64

failures: u32

Implementations

impl<T> Feed<T>

pub fn due(&self, now: u64) -> bool

pub fn ok(&mut self, now: u64, data: T, every_ms: u64)

pub fn fail(&mut self, now: u64, fail: Fail, every_ms: u64)

pub fn is_stale(&self) -> bool

Old data kept after a failure.

pub fn retry_in(&self, now: u64) -> Option<u64>

Seconds until the next try after a failure.

pub fn refresh_now(&mut self)

Asks for a read at the next tick (r).

pub fn reset(&mut self)

Trait Implementations

impl<T: Clone> Clone for Feed<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Feed<T>

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

Formats the value using the given formatter.

impl<T> Default for Feed<T>

fn default() -> Feed<T>

Returns the “default value” for a type.

impl<T: PartialEq> PartialEq for Feed<T>

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

Equality operator ==.

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

Inequality operator !=.

impl<T: PartialEq> StructuralPartialEq for Feed<T>