Struct Trace

pub struct Trace<S, M, MakeSpan = DefaultMakeSpan, OnRequest = DefaultOnRequest, OnResponse = DefaultOnResponse, OnBodyChunk = DefaultOnBodyChunk, OnEos = DefaultOnEos, OnFailure = DefaultOnFailure> { /* private fields */ }

Available on crate feature trace only.

Middleware that adds high level tracing to a Service.

See the module docs for an example.

Implementations

impl<S, M> Trace<S, M>

pub fn new(inner: S, make_classifier: M) -> Self

where M: MakeClassifier,

Create a new Trace using the given MakeClassifier.

pub fn layer(make_classifier: M) -> TraceLayer<M>

where M: MakeClassifier,

Returns a new Layer that wraps services with a TraceLayer middleware.

impl<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure> Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure>

pub fn get_ref(&self) -> &S

Gets a reference to the underlying service.

pub fn get_mut(&mut self) -> &mut S

Gets a mutable reference to the underlying service.

pub fn into_inner(self) -> S

Consumes self, returning the underlying service.

pub fn on_request<NewOnRequest>( self, new_on_request: NewOnRequest, ) -> Trace<S, M, MakeSpan, NewOnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure>

Customize what to do when a request is received.

NewOnRequest is expected to implement OnRequest.

pub fn on_response<NewOnResponse>( self, new_on_response: NewOnResponse, ) -> Trace<S, M, MakeSpan, OnRequest, NewOnResponse, OnBodyChunk, OnEos, OnFailure>

Customize what to do when a response has been produced.

NewOnResponse is expected to implement OnResponse.

pub fn on_body_chunk<NewOnBodyChunk>( self, new_on_body_chunk: NewOnBodyChunk, ) -> Trace<S, M, MakeSpan, OnRequest, OnResponse, NewOnBodyChunk, OnEos, OnFailure>

Customize what to do when a body chunk has been sent.

NewOnBodyChunk is expected to implement OnBodyChunk.

pub fn on_eos<NewOnEos>( self, new_on_eos: NewOnEos, ) -> Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, NewOnEos, OnFailure>

Customize what to do when a streaming response has closed.

NewOnEos is expected to implement OnEos.

pub fn on_failure<NewOnFailure>( self, new_on_failure: NewOnFailure, ) -> Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, NewOnFailure>

Customize what to do when a response has been classified as a failure.

NewOnFailure is expected to implement OnFailure.

pub fn make_span_with<NewMakeSpan>( self, new_make_span: NewMakeSpan, ) -> Trace<S, M, NewMakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure>

Customize how to make Spans that all request handling will be wrapped in.

NewMakeSpan is expected to implement MakeSpan.

impl<S> Trace<S, HttpMakeClassifier, DefaultMakeSpan, DefaultOnRequest, DefaultOnResponse, DefaultOnBodyChunk, DefaultOnEos, DefaultOnFailure>

pub fn new_for_http(inner: S) -> Self

Create a new Trace using ServerErrorsAsFailures which supports classifying regular HTTP responses based on the status code.

impl<S> Trace<S, GrpcMakeClassifier, DefaultMakeSpan, DefaultOnRequest, DefaultOnResponse, DefaultOnBodyChunk, DefaultOnEos, DefaultOnFailure>

pub fn new_for_grpc(inner: S) -> Self

Create a new Trace using GrpcErrorsAsFailures which supports classifying gRPC responses and streams based on the grpc-status header.

Trait Implementations

impl<S: Clone, M: Clone, MakeSpan: Clone, OnRequest: Clone, OnResponse: Clone, OnBodyChunk: Clone, OnEos: Clone, OnFailure: Clone> Clone for Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure>

fn clone( &self, ) -> Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<S: Debug, M: Debug, MakeSpan: Debug, OnRequest: Debug, OnResponse: Debug, OnBodyChunk: Debug, OnEos: Debug, OnFailure: Debug> Debug for Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<S, ReqBody, ResBody, M, OnRequestT, OnResponseT, OnFailureT, OnBodyChunkT, OnEosT, MakeSpanT> Service<Request<ReqBody>> for Trace<S, M, MakeSpanT, OnRequestT, OnResponseT, OnBodyChunkT, OnEosT, OnFailureT>

where S: Service<Request<ReqBody>, Response = Response<ResBody>>, ReqBody: Body, ResBody: Body, ResBody::Error: Display + 'static, S::Error: Display + 'static, M: MakeClassifier, M::Classifier: Clone, MakeSpanT: MakeSpan<ReqBody>, OnRequestT: OnRequest<ReqBody>, OnResponseT: OnResponse<ResBody> + Clone, OnBodyChunkT: OnBodyChunk<ResBody::Data> + Clone, OnEosT: OnEos + Clone, OnFailureT: OnFailure<M::FailureClass> + Clone,

type Response = Response<ResponseBody<ResBody, <M as MakeClassifier>::ClassifyEos, OnBodyChunkT, OnEosT, OnFailureT>>

Responses given by the service.

type Error = <S as Service<Request<ReqBody>>>::Error

Errors produced by the service.

type Future = ResponseFuture<<S as Service<Request<ReqBody>>>::Future, <M as MakeClassifier>::Classifier, OnResponseT, OnBodyChunkT, OnEosT, OnFailureT>

The future response value.

fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>>

Returns Poll::Ready(Ok(())) when the service is able to process requests.

fn call(&mut self, req: Request<ReqBody>) -> Self::Future

Process the request and return the response asynchronously.

impl<S: Copy, M: Copy, MakeSpan: Copy, OnRequest: Copy, OnResponse: Copy, OnBodyChunk: Copy, OnEos: Copy, OnFailure: Copy> Copy for Trace<S, M, MakeSpan, OnRequest, OnResponse, OnBodyChunk, OnEos, OnFailure>