Trait Host 

pub trait Host: Send {
    // Required methods
    fn on_start(
        &mut self,
        context: SpanContext,
    ) -> impl Future<Output = Result<()>> + Send;
    fn on_end(
        &mut self,
        span: SpanData,
    ) -> impl Future<Output = Result<()>> + Send;
    fn outer_span_context(
        &mut self,
    ) -> impl Future<Output = Result<SpanContext>> + Send;
}

Required Methods

fn on_start( &mut self, context: SpanContext, ) -> impl Future<Output = Result<()>> + Send

Called when a span is started.

fn on_end(&mut self, span: SpanData) -> impl Future<Output = Result<()>> + Send

Called when a span is ended.

fn outer_span_context( &mut self, ) -> impl Future<Output = Result<SpanContext>> + Send

Returns the span context of the host.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<_T: Host + ?Sized + Send> Host for &mut _T

fn on_start( &mut self, context: SpanContext, ) -> impl Future<Output = Result<()>> + Send

Called when a span is started.

fn on_end(&mut self, span: SpanData) -> impl Future<Output = Result<()>> + Send

Called when a span is ended.

fn outer_span_context( &mut self, ) -> impl Future<Output = Result<SpanContext>> + Send

Returns the span context of the host.

Implementors