Trait ParamStore 

pub trait ParamStore {
    // Required methods
    fn load(&self, apply: &mut dyn FnMut(&str, ParameterValue));
    fn save(
        &mut self,
        params: &mut dyn Iterator<Item = (&str, &ParameterValue)>,
    ) -> Result<(), ParamStoreError>;
}

Backend that persists runtime parameter overrides across restarts (172.H).

Object-safe so the executor can hold a Box<dyn ParamStore>.

Required Methods

fn load(&self, apply: &mut dyn FnMut(&str, ParameterValue))

Apply each persisted (name, value) via apply. Called once at boot after defaults are declared, so persisted values override them.

fn save( &mut self, params: &mut dyn Iterator<Item = (&str, &ParameterValue)>, ) -> Result<(), ParamStoreError>

Persist the full current parameter set. params yields (name, value) for every declared parameter; called after a runtime set changes a value. Non-scalar values (arrays, NotSet) are backend-defined and may be skipped.

Implementors

impl ParamStore for FileParamStore

impl ParamStore for NullParamStore