Struct AdaptiveRateLimit 

pub struct AdaptiveRateLimit {
    pub enabled: bool,
    pub ewma_window_secs: u64,
    pub min_factor: f64,
    pub max_factor: f64,
    pub error_threshold: f64,
    pub latency_threshold_ms: u64,
    pub origin_signals: Vec<OriginSignal>,
}

Adaptive + origin-driven rate-limit tuning (DW-089, policies[].adaptive): an EWMA of upstream error rate and latency dynamically scales this policy’s rate-limit quotas at check time (the factor multiplies the effective cost of each request against the GCRA bucket), and upstream-originated signals trigger an immediate backoff. The factor is bounded [min_factor, max_factor] (never 0, never unbounded); tightening under stress is faster than relaxing when healthy (asymmetric, so the gateway errs toward protecting upstreams). origin_signals selects which upstream response signals the controller honors (currently retry_after).

Fields

enabled: bool

Whether adaptive tuning is enabled (default true). A policies[].adaptive block with enabled: false is a no-op (the controller is not compiled for that policy).

ewma_window_secs: u64

EWMA decay window in seconds for error-rate and latency tracking (default 60). A larger window smooths transient spikes; a smaller window reacts faster. Must be > 0.

min_factor: f64

Minimum adaptive factor (default 0.1): the tightest the quotas can shrink to (10% of the configured rate). Must be > 0 and <= max_factor. The factor is never 0.

max_factor: f64

Maximum adaptive factor (default 2.0): the loosest the quotas can grow to (200% of the configured rate). Must be > 0 and >= min_factor. The factor is never unbounded.

error_threshold: f64

Error-rate EWMA threshold that triggers tightening (default 0.05 = 5% 5xx rate). When the error EWMA exceeds this, the factor decreases toward min_factor. Must be in (0, 1].

latency_threshold_ms: u64

Latency EWMA threshold in milliseconds that triggers tightening (default 500). When the latency EWMA exceeds this, the factor decreases toward min_factor. Must be > 0.

origin_signals: Vec<OriginSignal>

Upstream-originated signals the controller honors (default empty: EWMA-only tuning). Currently supported: retry_after (parse the upstream Retry-After header and back off for the advertised window).

Trait Implementations

impl Clone for AdaptiveRateLimit

fn clone(&self) -> AdaptiveRateLimit

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AdaptiveRateLimit

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for AdaptiveRateLimit

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl JsonSchema for AdaptiveRateLimit

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl PartialEq for AdaptiveRateLimit

fn eq(&self, other: &AdaptiveRateLimit) -> 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 Serialize for AdaptiveRateLimit

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for AdaptiveRateLimit