Enum DeliveryMode

pub enum DeliveryMode {
    Immediate,
    Queued,
}

Specifies how and when an eviction notification should be delivered to an eviction listener.

For more details, see the document of sync::Cache.

Variants

Immediate

With this mode, a notification should be delivered to the listener immediately after an entry was evicted. It also guarantees that eviction notifications and cache write operations such and insert, get_with and invalidate for a given cache key are ordered by the time when they occurred.

To guarantee the order, cache maintains key-level lock, which will reduce concurrent write performance.

Use this mode when the order is more import than the write performance.

Queued

With this mode, a notification will be delivered to the listener some time after an entry was evicted. Therefore, it does not preserve the order of eviction notifications and write operations.

On the other hand, cache does not maintain key-level lock, so there will be no overhead on write performance.

Use this mode when write performance is more important than preserving the order of eviction notifications and write operations.

Trait Implementations

impl Clone for DeliveryMode

fn clone(&self) -> DeliveryMode

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DeliveryMode

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

Formats the value using the given formatter.

impl Default for DeliveryMode

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for DeliveryMode

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for DeliveryMode

impl Eq for DeliveryMode

impl StructuralPartialEq for DeliveryMode