Trait CostRecorder 

pub trait CostRecorder:
    Send
    + Sync
    + Debug {
    // Required method
    fn record<'life0, 'life1, 'life2, 'async_trait>(
        &'life0 self,
        ctx: &'life1 ConnectionContext,
        response_body: &'life2 Value,
    ) -> Pin<Box<dyn Future<Output = Result<(), ProxyError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait,
             'life2: 'async_trait;
}

Post-response cost recording hook.

Called after the on_response middleware chain completes and before the axum response is built. Implementors (typically the cost crate) use this to extract usage, calculate cost, and persist a CostRecord.

This is deliberately not part of ProxyMiddleware because cost recording needs to happen after ALL other response transformations are done.

Required Methods

fn record<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, ctx: &'life1 ConnectionContext, response_body: &'life2 Value, ) -> Pin<Box<dyn Future<Output = Result<(), ProxyError>> + Send + 'async_trait>>

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

Record a cost entry for the completed request.

response_body is the final response body JSON (after all middleware transforms have been applied).

Dyn Compatibility

This trait is dyn compatible.

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

Implementors