Struct UpstreamLocality 

pub struct UpstreamLocality {
    pub mode: LocalityMode,
    pub enforce_data_residency: bool,
    pub allowed_regions: Vec<String>,
    pub denied_regions: Vec<String>,
}

DW-094 (Ent): locality-aware routing and data residency configuration for an upstream. Controls how the balancer uses endpoint region/ zone fields to filter or prefer endpoints.

Fields

mode: LocalityMode

The routing mode (DW-094):

• prefer: prefer endpoints in the edge’s region; fall back to other regions if none are available (healthy).
• strict: only route to endpoints in the edge’s region; fail with 503 if none are available (no cross-region fallback).
• failover: prefer the edge’s region, fall back to other regions only when all local endpoints are ejected (like prefer but with a stricter local-first policy — local endpoints are always tried first even if unhealthy).

enforce_data_residency: bool

Data residency enforcement: when true, the balancer drops endpoints whose region is not in allowed_regions BEFORE applying the locality mode. This is a hard constraint — endpoints outside the allowed set are never used, even as a fallback. Use this to comply with data sovereignty requirements (e.g. EU traffic must stay in EU regions).

allowed_regions: Vec<String>

The allowed regions when enforce_data_residency is true. An endpoint with no region field is always allowed (locality- agnostic). An endpoint with a region not in this list is dropped. Must be non-empty when enforce_data_residency is true.

denied_regions: Vec<String>

The denied regions (optional). An endpoint with a region in this list is always dropped, regardless of other settings. Use this to exclude specific regions without enumerating all allowed ones.

Trait Implementations

impl Clone for UpstreamLocality

fn clone(&self) -> UpstreamLocality

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UpstreamLocality

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for UpstreamLocality

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl JsonSchema for UpstreamLocality

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 UpstreamLocality

fn eq(&self, other: &UpstreamLocality) -> 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 UpstreamLocality

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 UpstreamLocality