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SaturationPolicy

rama::net::client::pool

Enum SaturationPolicy

#[non_exhaustive]pub enum SaturationPolicy {
    Wait,
    EvictIdleWhenCold,
    EvictIdleAfter(Duration),
    EvictIdle,
}

Available on crate feature net only.

Expand description

What a MultiplexPool at a connection limit does for a checkout that needs a new connection: wait, or replace an idle connection, of its own id at the id’s limit and of any id at the total one.

Closing another connection costs that connection’s next request a new handshake, so the default waits a little for the checkout’s own connections first (see Self::EvictIdleAfter for its timer). An idle connection goes to the checkout that arrived first among those waiting to use it, to replace it for the total limit and to replace it for its id’s limit.

Variants (Non-exhaustive)§

This enum is marked as non-exhaustive

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Wait

Wait for a connection slot; never close another connection for one.

EvictIdleWhenCold

Close the least recently used idle connection only for a checkout none of whose connections can take a stream; others wait for their own.

EvictIdleAfter(Duration)

As Self::EvictIdleWhenCold, and for any checkout that waited this long.

Waits on a tokio timer: the runtime needs its time driver enabled.

EvictIdle

Close the least recently used idle connection whenever a checkout needs a slot.

Trait Implementations§

impl Clone for SaturationPolicy

fn clone(&self) -> SaturationPolicy

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

impl Copy for SaturationPolicy

impl Debug for SaturationPolicy

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

Formats the value using the given formatter. Read more

impl Default for SaturationPolicy

fn default() -> SaturationPolicy

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

impl Eq for SaturationPolicy

impl PartialEq for SaturationPolicy

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

Equality operator ==. Read more

1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more

impl StructuralPartialEq for SaturationPolicy

Auto Trait Implementations§

impl Freeze for SaturationPolicy

impl RefUnwindSafe for SaturationPolicy

impl Send for SaturationPolicy

impl Sync for SaturationPolicy

impl Unpin for SaturationPolicy

impl UnsafeUnpin for SaturationPolicy

impl UnwindSafe for SaturationPolicy

Blanket Implementations§

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where T: 'static + ?Sized,

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

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

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

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