Struct RoutingPolicy 

pub struct RoutingPolicy {
    pub truth_preferences: HashMap<String, String>,
    pub risk_tier_backends: HashMap<RiskTier, Vec<String>>,
    pub data_classification_backends: HashMap<DataClassification, Vec<String>>,
    pub default_backend: String,
}

Policy for routing requests to backends.

Routing should be policy-based, not ad-hoc. This type encodes the rules for selecting backends based on:

• Truth preferences (which truths prefer which backends)
• Risk tier (critical/high-risk operations may require local)
• Data classification (sensitive data may require local)

Axiom: Explicit Authority

Backend selection is never implicit. Policies must explicitly allow remote backends, and default-deny is the recommended stance.

Fields

truth_preferences: HashMap<String, String>

Truth target → preferred backend

risk_tier_backends: HashMap<RiskTier, Vec<String>>

Risk tier → allowed backends

data_classification_backends: HashMap<DataClassification, Vec<String>>

Data classification → allowed backends

default_backend: String

Default backend if no rule matches

Implementations

impl RoutingPolicy

pub fn default_deny_remote() -> Self

Create a policy that denies remote backends by default.

Remote backends must be explicitly allowed via risk tier or data classification. This is the recommended default for security-conscious deployments.

pub fn is_backend_allowed( &self, backend_name: &str, risk_tier: RiskTier, data_classification: DataClassification, ) -> bool

Check if a backend is allowed for the given context.

pub fn select_backend( &self, truth_ids: &[String], risk_tier: RiskTier, data_classification: DataClassification, ) -> &str

Select a backend for the given request context.

Trait Implementations

impl Clone for RoutingPolicy

fn clone(&self) -> RoutingPolicy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RoutingPolicy

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

Formats the value using the given formatter.

impl Default for RoutingPolicy

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for RoutingPolicy

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for RoutingPolicy

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

where __S: Serializer,

Serialize this value into the given Serde serializer.