Trait JoinSetTracer 

pub trait JoinSetTracer:
    Send
    + Sync
    + 'static {
    // Required methods
    fn trace_future(
        &self,
        fut: BoxFuture<'static, Box<dyn Any + Send>>,
    ) -> BoxFuture<'static, Box<dyn Any + Send>>;
    fn trace_block(
        &self,
        f: Box<dyn FnOnce() -> Box<dyn Any + Send> + Send>,
    ) -> Box<dyn FnOnce() -> Box<dyn Any + Send> + Send>;
}

A trait for injecting instrumentation into either asynchronous futures or blocking closures at runtime.

Required Methods

fn trace_future( &self, fut: BoxFuture<'static, Box<dyn Any + Send>>, ) -> BoxFuture<'static, Box<dyn Any + Send>>

Function pointer type for tracing a future.

This function takes a boxed future (with its output type erased) and returns a boxed future (with its output still erased). The tracer must apply instrumentation without altering the output.

fn trace_block( &self, f: Box<dyn FnOnce() -> Box<dyn Any + Send> + Send>, ) -> Box<dyn FnOnce() -> Box<dyn Any + Send> + Send>

Function pointer type for tracing a blocking closure.

This function takes a boxed closure (with its return type erased) and returns a boxed closure (with its return type still erased). The tracer must apply instrumentation without changing the return value.

Dyn Compatibility

This trait is dyn compatible.

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

Implementors