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LoadShedPolicy

decdn_node::load_shed

Trait LoadShedPolicy 

Source 
pub trait LoadShedPolicy: Send + Sync {
    // Required method
    fn decide(
        &self,
        class: RequestClass,
        snap: &PressureSnapshot,
    ) -> ShedDecision;

    // Provided method
    fn pressure_active(&self) -> bool { ... }
}
Expand description

A pluggable overload-protection policy. decide is pure over the snapshot so it is unit-testable without a running node; the node wiring layer selects the implementation from config.

Required Methods§

Source

fn decide(&self, class: RequestClass, snap: &PressureSnapshot) -> ShedDecision

Judge one request against a single pressure sample.

Provided Methods§

Source

fn pressure_active(&self) -> bool

Whether the policy currently considers the node pressured. Drives the load_shed_pressure_active gauge; defaults to false for policies with no pressure notion (e.g. AlwaysAdmit).

Dyn Compatibility§

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors§