Struct OptimizerDispatcher 

pub struct OptimizerDispatcher { /* private fields */ }

Optimizer dispatcher (brain — selects family & maintains stats).

Implementations

impl OptimizerDispatcher

pub fn new( cost_model: CostModel, stats: QueryStats, config: DispatcherConfig, ) -> Self

Construct a dispatcher with explicit cost model, stats, and config.

pub fn cost_model(&self) -> &CostModel

Borrow the underlying cost model.

pub fn stats(&self) -> &QueryStats

Borrow the accumulated runtime statistics.

pub fn config(&self) -> &DispatcherConfig

Borrow the dispatcher configuration.

pub fn cost_model_mut(&mut self) -> &mut CostModel

Mutable access for tests and configuration updates.

pub fn stats_mut(&mut self) -> &mut QueryStats

Mutable access for stats — generally only needed by the wrapper.

pub fn pick_plan( &self, workload: &WorkloadProfile, ) -> Result<DispatchPlan, DispatchError>

Pick a DispatchPlan for the given workload.

pub fn should_fallback(&self, plan: &DispatchPlan, observed_recall: f32) -> bool

Evaluate whether an observed recall on the primary triggers fallback.

pub fn record_observation(&mut self, observation: QueryObservation) -> bool

Record a query observation and refresh weights when the interval is hit.

Returns true if weights were refreshed during this call.

pub fn force_refresh_weights(&mut self)

Force-refresh cost-model weights from the current stats snapshot.

Trait Implementations

impl Default for OptimizerDispatcher

fn default() -> Self

Returns the “default value” for a type.