Struct tower_http::trace::Trace

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

Middleware that adds high level tracing to a Service.

See the module docs for an example.

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

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

Create a new Trace using the given MakeClassifier.

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

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

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

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pub fn get_ref(&self) -> &S

Gets a reference to the underlying service.

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

Gets a mutable reference to the underlying service.

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pub fn into_inner(self) -> S

Consumes self, returning the underlying service.

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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.

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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.

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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.

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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.

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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.

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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.

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

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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.

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

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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§

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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>

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

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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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>

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

Formats the value using the given formatter. Read more
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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,

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

Responses given by the service.
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type Error = <S as Service<Request<ReqBody>>>::Error

Errors produced by the service.
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type Future = ResponseFuture<<S as Service<Request<ReqBody>>>::Future, <M as MakeClassifier>::Classifier, OnResponseT, OnBodyChunkT, OnEosT, OnFailureT>

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

Returns Poll::Ready(Ok(())) when the service is able to process requests. Read more
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fn call(&mut self, req: Request<ReqBody>) -> Self::Future

Process the request and return the response asynchronously. Read more
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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>

Auto Trait Implementations§

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

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

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

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

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

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

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> CloneToUninit for T
where T: Copy,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, Request> ServiceExt<Request> for T
where T: Service<Request> + ?Sized,

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fn ready(&mut self) -> Ready<'_, Self, Request>
where Self: Sized,

Yields a mutable reference to the service when it is ready to accept a request.
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fn ready_and(&mut self) -> Ready<'_, Self, Request>
where Self: Sized,

👎Deprecated since 0.4.6: please use the ServiceExt::ready method instead
Yields a mutable reference to the service when it is ready to accept a request.
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fn ready_oneshot(self) -> ReadyOneshot<Self, Request>
where Self: Sized,

Yields the service when it is ready to accept a request.
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fn oneshot(self, req: Request) -> Oneshot<Self, Request>
where Self: Sized,

Consume this Service, calling with the providing request once it is ready.
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fn call_all<S>(self, reqs: S) -> CallAll<Self, S>
where Self: Sized, Self::Error: Into<Box<dyn Error + Sync + Send>>, S: Stream<Item = Request>,

Process all requests from the given Stream, and produce a Stream of their responses. Read more
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fn and_then<F>(self, f: F) -> AndThen<Self, F>
where Self: Sized, F: Clone,

Executes a new future after this service’s future resolves. This does not alter the behaviour of the poll_ready method. Read more
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fn map_response<F, Response>(self, f: F) -> MapResponse<Self, F>
where Self: Sized, F: FnOnce(Self::Response) -> Response + Clone,

Maps this service’s response value to a different value. This does not alter the behaviour of the poll_ready method. Read more
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fn map_err<F, Error>(self, f: F) -> MapErr<Self, F>
where Self: Sized, F: FnOnce(Self::Error) -> Error + Clone,

Maps this service’s error value to a different value. This does not alter the behaviour of the poll_ready method. Read more
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fn map_result<F, Response, Error>(self, f: F) -> MapResult<Self, F>
where Self: Sized, Error: From<Self::Error>, F: FnOnce(Result<Self::Response, Self::Error>) -> Result<Response, Error> + Clone,

Maps this service’s result type (Result<Self::Response, Self::Error>) to a different value, regardless of whether the future succeeds or fails. Read more
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fn map_request<F, NewRequest>(self, f: F) -> MapRequest<Self, F>
where Self: Sized, F: FnMut(NewRequest) -> Request,

Composes a function in front of the service. Read more
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fn filter<F, NewRequest>(self, filter: F) -> Filter<Self, F>
where Self: Sized, F: Predicate<NewRequest>,

Composes this service with a Filter that conditionally accepts or rejects requests based on a predicate. Read more
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fn filter_async<F, NewRequest>(self, filter: F) -> AsyncFilter<Self, F>
where Self: Sized, F: AsyncPredicate<NewRequest>,

Composes this service with an AsyncFilter that conditionally accepts or rejects requests based on an [async predicate]. Read more
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fn then<F, Response, Error, Fut>(self, f: F) -> Then<Self, F>
where Self: Sized, Error: From<Self::Error>, F: FnOnce(Result<Self::Response, Self::Error>) -> Fut + Clone, Fut: Future<Output = Result<Response, Error>>,

Composes an asynchronous function after this service. Read more
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fn map_future<F, Fut, Response, Error>(self, f: F) -> MapFuture<Self, F>
where Self: Sized, F: FnMut(Self::Future) -> Fut, Error: From<Self::Error>, Fut: Future<Output = Result<Response, Error>>,

Composes a function that transforms futures produced by the service. Read more
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fn boxed(self) -> BoxService<Request, Self::Response, Self::Error>
where Self: Sized + Send + 'static, Self::Future: Send + 'static,

Convert the service into a Service + Send trait object. Read more
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fn boxed_clone(self) -> BoxCloneService<Request, Self::Response, Self::Error>
where Self: Sized + Clone + Send + 'static, Self::Future: Send + 'static,

Convert the service into a Service + Clone + Send trait object. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more