rama::layer::limit::policy

Struct ConcurrentPolicy

pub struct ConcurrentPolicy<B, C> { /* private fields */ }
Expand description

A Policy that limits the number of concurrent requests.

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impl<B, C> ConcurrentPolicy<B, C>

pub fn with_backoff(backoff: B, tracker: C) -> ConcurrentPolicy<B, C>

Create a new ConcurrentPolicy, using the given ConcurrentTracker, and the given Backoff policy.

The Backoff policy is used to backoff when the concurrent request limit is reached.

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impl<C> ConcurrentPolicy<(), C>

pub const fn new(tracker: C) -> ConcurrentPolicy<(), C>

Create a new ConcurrentPolicy, using the given ConcurrentTracker.

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impl ConcurrentPolicy<(), ConcurrentCounter>

pub fn max(max: usize) -> ConcurrentPolicy<(), ConcurrentCounter>

Create a new concurrent policy, which aborts the request if the max limit is reached.

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impl<B> ConcurrentPolicy<B, ConcurrentCounter>

pub fn max_with_backoff( max: usize, backoff: B, ) -> ConcurrentPolicy<B, ConcurrentCounter>

Create a new concurrent policy, which backs off if the limit is reached, using the given backoff policy.

Trait Implementations§

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impl<B, C> Clone for ConcurrentPolicy<B, C>
where B: Clone, C: Clone,

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fn clone(&self) -> ConcurrentPolicy<B, C>

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<B, C> Debug for ConcurrentPolicy<B, C>
where B: Debug, C: Debug,

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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<B, C, State, Request> Policy<State, Request> for ConcurrentPolicy<B, C>
where B: Backoff, State: Clone + Send + Sync + 'static, Request: Send + 'static, C: ConcurrentTracker,

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type Guard = <C as ConcurrentTracker>::Guard

The guard type that is returned when the request is allowed to proceed. Read more
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type Error = <C as ConcurrentTracker>::Error

The error type that is returned when the request is not allowed to proceed, and should be aborted. Read more
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async fn check( &self, ctx: Context<State>, request: Request, ) -> PolicyResult<State, Request, <ConcurrentPolicy<B, C> as Policy<State, Request>>::Guard, <ConcurrentPolicy<B, C> as Policy<State, Request>>::Error>

Check whether the request is allowed to proceed. Read more

Auto Trait Implementations§

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impl<B, C> Freeze for ConcurrentPolicy<B, C>
where C: Freeze, B: Freeze,

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impl<B, C> RefUnwindSafe for ConcurrentPolicy<B, C>
where C: RefUnwindSafe, B: RefUnwindSafe,

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impl<B, C> Send for ConcurrentPolicy<B, C>
where C: Send, B: Send,

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impl<B, C> Sync for ConcurrentPolicy<B, C>
where C: Sync, B: Sync,

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impl<B, C> Unpin for ConcurrentPolicy<B, C>
where C: Unpin, B: Unpin,

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impl<B, C> UnwindSafe for ConcurrentPolicy<B, C>
where C: UnwindSafe, B: UnwindSafe,

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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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> Conv for T

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fn conv<T>(self) -> T
where Self: Into<T>,

Converts self into T using Into<T>. Read more
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impl<T> FmtForward for T

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fn fmt_binary(self) -> FmtBinary<Self>
where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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fn fmt_octal(self) -> FmtOctal<Self>
where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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fn fmt_pointer(self) -> FmtPointer<Self>
where Self: Pointer,

Causes self to use its Pointer implementation when Debug-formatted.
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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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fn fmt_upper_hex(self) -> FmtUpperHex<Self>
where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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fn fmt_list(self) -> FmtList<Self>
where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. 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> FutureExt for T

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fn with_context(self, otel_cx: Context) -> WithContext<Self> ⓘ

Attaches the provided Context to this type, returning a WithContext wrapper. Read more
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Attaches the current Context to this type, returning a WithContext wrapper. Read more
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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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Calls U::from(self).

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

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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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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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fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> R
where Self: Sized,

Pipes by value. This is generally the method you want to use. Read more
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fn pipe_ref<'a, R>(&'a self, func: impl FnOnce(&'a Self) -> R) -> R
where R: 'a,

Borrows self and passes that borrow into the pipe function. Read more
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Mutably borrows self and passes that borrow into the pipe function. Read more
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where Self: Borrow<B>, B: 'a + ?Sized, R: 'a,

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where Self: BorrowMut<B>, B: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.borrow_mut() into the pipe function. Read more
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where Self: AsRef<U>, U: 'a + ?Sized, R: 'a,

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where Self: AsMut<U>, U: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.as_mut() into the pipe function.
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where Self: Deref<Target = T>, T: 'a + ?Sized, R: 'a,

Borrows self, then passes self.deref() into the pipe function.
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where Self: DerefMut<Target = T> + Deref, T: 'a + ?Sized, R: 'a,

Mutably borrows self, then passes self.deref_mut() into the pipe function.
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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> PolicyExt for T
where T: ?Sized,

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fn and<S, P, B, E>(self, other: P) -> And<T, P>
where T: Policy<S, B, E>, P: Policy<S, B, E>,

Create a new Policy that returns Action::Follow only if self and other return Action::Follow. Read more
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fn or<S, P, B, E>(self, other: P) -> Or<T, P>
where T: Policy<S, B, E>, P: Policy<S, B, E>,

Create a new Policy that returns Action::Follow if either self or other returns Action::Follow. Read more
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type Output = T

Should always be Self
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fn tap(self, func: impl FnOnce(&Self)) -> Self

Immutable access to a value. Read more
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Mutable access to a value. Read more
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where Self: Borrow<B>, B: ?Sized,

Immutable access to the Borrow<B> of a value. Read more
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where Self: BorrowMut<B>, B: ?Sized,

Mutable access to the BorrowMut<B> of a value. Read more
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where Self: AsRef<R>, R: ?Sized,

Immutable access to the AsRef<R> view of a value. Read more
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Mutable access to the AsMut<R> view of a value. Read more
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Calls .tap() only in debug builds, and is erased in release builds.
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Calls .tap_mut() only in debug builds, and is erased in release builds.
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Calls .tap_borrow() only in debug builds, and is erased in release builds.
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Calls .tap_ref() only in debug builds, and is erased in release builds.
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Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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The resulting type after obtaining ownership.
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where Self: TryInto<T>,

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