TokenBucket

vmm::rate_limiter

Struct TokenBucket 

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pub struct TokenBucket { /* private fields */ }
Expand description

TokenBucket provides a lower level interface to rate limiting with a configurable capacity, refill-rate and initial burst.

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impl TokenBucket

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pub fn new( size: u64, one_time_burst: u64, complete_refill_time_ms: u64, ) -> Option<Self>

Creates a TokenBucket wrapped in an Option.

TokenBucket created is of size total capacity and takes complete_refill_time_ms milliseconds to go from zero tokens to total capacity. The one_time_burst is initial extra credit on top of total capacity, that does not replenish and which can be used for an initial burst of data.

If the size or the complete refill time are zero, then None is returned.

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pub fn reduce(&mut self, tokens: u64) -> BucketReduction

Attempts to consume tokens from the bucket and returns whether the action succeeded.

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pub fn force_replenish(&mut self, tokens: u64)

“Manually” adds tokens to bucket.

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pub fn capacity(&self) -> u64

Returns the capacity of the token bucket.

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pub fn one_time_burst(&self) -> u64

Returns the remaining one time burst budget.

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pub fn refill_time_ms(&self) -> u64

Returns the time in milliseconds required to to completely fill the bucket.

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pub fn budget(&self) -> u64

Returns the current budget (one time burst allowance notwithstanding).

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pub fn initial_one_time_burst(&self) -> u64

Returns the initially configured one time burst budget.

Trait Implementations§

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impl Clone for TokenBucket

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fn clone(&self) -> TokenBucket

Returns a duplicate 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 Debug for TokenBucket

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

Formats the value using the given formatter. Read more
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impl From<&TokenBucket> for TokenBucketConfig

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fn from(tb: &TokenBucket) -> Self

Converts to this type from the input type.
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impl PartialEq for TokenBucket

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Persist<'_> for TokenBucket

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type State = TokenBucketState

The type of the object representing the state of the component.
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type ConstructorArgs = ()

The type of the object holding the constructor arguments.
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type Error = Error

The type of the error that can occur while constructing the object.
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fn save(&self) -> Self::State

Returns the current state of the component.
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fn restore( _: Self::ConstructorArgs, state: &Self::State, ) -> Result<Self, Self::Error>

Constructs a component from a specified state.
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impl Eq for TokenBucket

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impl StructuralPartialEq for TokenBucket

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impl<T> Any for T
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unsafe fn clone_to_uninit(&self, dest: *mut u8)

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