Trait ModelSource 

pub trait ModelSource: Send + Sync {
    // Required methods
    fn name(&self) -> &'static str;
    fn resolve<'life0, 'life1, 'life2, 'async_trait>(
        &'life0 self,
        model_id: &'life1 str,
        opts: &'life2 ResolveOptions,
    ) -> Pin<Box<dyn Future<Output = Result<ModelDir, AsrError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait,
             'life2: 'async_trait;
    fn capabilities_for<'life0, 'life1, 'async_trait>(
        &'life0 self,
        model_id: &'life1 str,
    ) -> Pin<Box<dyn Future<Output = Result<ModelCapabilities, AsrError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;

    // Provided method
    fn list_available<'life0, 'async_trait>(
        &'life0 self,
    ) -> Pin<Box<dyn Future<Output = Result<Vec<ModelDescriptor>, AsrError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait { ... }
}

A source of models (Hugging Face, a local directory, future registries).

Acquisition is inherently asynchronous (network downloads), so this trait uses async_trait even though crate::AsrEngine is sync. The trait requires Send + Sync so a Box<dyn ModelSource> can move across thread boundaries inside an HTTP server or CLI.

Required Methods

fn name(&self) -> &'static str

Short, stable identifier for this source ("huggingface", "local", …).

fn resolve<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, model_id: &'life1 str, opts: &'life2 ResolveOptions, ) -> Pin<Box<dyn Future<Output = Result<ModelDir, AsrError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Resolve a model id (e.g. Qwen/Qwen3-ASR-0.6B) to a concrete ModelDir on disk, downloading if necessary.

fn capabilities_for<'life0, 'life1, 'async_trait>( &'life0 self, model_id: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<ModelCapabilities, AsrError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Query a model’s capabilities without downloading the weights.

Provided Methods

fn list_available<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<Vec<ModelDescriptor>, AsrError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

List models known to this source. Defaults to AsrError::Unsupported because not every source can enumerate.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors