Struct matrix_sdk_base::failures_cache::FailuresCache

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pub struct FailuresCache<T>
where T: Eq + Hash,
{ /* private fields */ }
Expand description

A TTL cache where items get inactive instead of discarded.

The items need to be explicitly removed from the cache. This allows us to implement exponential backoff based TTL.

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impl<T> FailuresCache<T>
where T: Eq + Hash,

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pub fn new() -> FailuresCache<T>

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pub fn with_settings(max_delay: Duration, multiplier: u8) -> FailuresCache<T>

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pub fn contains<Q>(&self, key: &Q) -> bool
where T: Borrow<Q>, Q: Hash + Eq + ?Sized,

Is the given key non-expired and part of the cache.

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pub fn failure_count<Q>(&self, key: &Q) -> Option<u8>
where T: Borrow<Q>, Q: Hash + Eq + ?Sized,

Get the failure count for a given key.

§Returns
  • None if this key is not in the failure cache. (It has never failed, or it has been FailuresCache::remove()d since the last failure.)

  • Some(u8): the number of times it has failed since it was first added to the failure cache. (In other words, one less than the total number of failures.)

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pub fn insert(&self, item: T)

Add a single item to the cache.

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pub fn extend(&self, iterator: impl IntoIterator<Item = T>)

Extend the cache with the given iterator of items.

Items that are already part of the cache, whether they are expired or not, will have their TTL extended using an exponential backoff algorithm.

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pub fn remove<'a, I, Q>(&'a self, iterator: I)
where I: Iterator<Item = &'a Q>, T: Borrow<Q>, Q: Hash + Eq + 'a + ?Sized,

Remove the items contained in the iterator from the cache.

Trait Implementations§

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impl<T> Clone for FailuresCache<T>
where T: Clone + Eq + Hash,

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

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<T> Debug for FailuresCache<T>
where T: Debug + Eq + Hash,

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

Formats the value using the given formatter. Read more
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impl<T> Default for FailuresCache<T>
where T: Eq + Hash,

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fn default() -> FailuresCache<T>

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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impl<T> Freeze for FailuresCache<T>

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impl<T> RefUnwindSafe for FailuresCache<T>

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impl<T> Send for FailuresCache<T>
where T: Send + Sync,

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impl<T> Sync for FailuresCache<T>
where T: Send + Sync,

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impl<T> Unpin for FailuresCache<T>

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impl<T> UnwindSafe for FailuresCache<T>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, W> HasTypeWitness<W> for T
where W: MakeTypeWitness<Arg = T>, T: ?Sized,

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const WITNESS: W = W::MAKE

A constant of the type witness
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impl<T> Identity for T
where T: ?Sized,

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type Type = T

The same type as Self, used to emulate type equality bounds (T == U) with associated type equality constraints (T: Identity<Type = U>).
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const TYPE_EQ: TypeEq<T, <T as Identity>::Type> = TypeEq::NEW

Proof that Self is the same type as Self::Type, provides methods for casting between Self and Self::Type.
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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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where S: Into<Dispatch>,

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