pub struct ErrorLayer<S, F = DefaultFields> { /* private fields */ }
Expand description

A subscriber Layer that enables capturing SpanTraces.

Optionally, this type may be constructed with a field formatter to use when formatting the fields of each span in a trace. When no formatter is provided, the default format is used instead.

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impl<S, F> ErrorLayer<S, F>
where F: for<'writer> FormatFields<'writer> + 'static, S: Subscriber + for<'span> LookupSpan<'span>,

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pub fn new(format: F) -> Self

Returns a new ErrorLayer with the provided field formatter.

Trait Implementations§

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impl<S, F: Debug> Debug for ErrorLayer<S, F>

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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> Default for ErrorLayer<S>
where S: Subscriber + for<'span> LookupSpan<'span>,

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl<S, F> Layer<S> for ErrorLayer<S, F>
where S: Subscriber + for<'span> LookupSpan<'span>, F: for<'writer> FormatFields<'writer> + 'static,

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fn on_new_span(&self, attrs: &Attributes<'_>, id: &Id, ctx: Context<'_, S>)

Notifies this layer that a new span was constructed with the given Attributes and Id.

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fn on_register_dispatch(&self, subscriber: &Dispatch)

Performs late initialization when installing this layer as a Subscriber. Read more
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fn on_layer(&mut self, subscriber: &mut S)

Performs late initialization when attaching a Layer to a Subscriber. Read more
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fn register_callsite(&self, metadata: &'static Metadata<'static>) -> Interest

Registers a new callsite with this layer, returning whether or not the layer is interested in being notified about the callsite, similarly to Subscriber::register_callsite. Read more
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fn enabled(&self, metadata: &Metadata<'_>, ctx: Context<'_, S>) -> bool

Returns true if this layer is interested in a span or event with the given metadata in the current Context, similarly to Subscriber::enabled. Read more
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fn on_record(&self, _span: &Id, _values: &Record<'_>, _ctx: Context<'_, S>)

Notifies this layer that a span with the given Id recorded the given values.
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fn on_follows_from(&self, _span: &Id, _follows: &Id, _ctx: Context<'_, S>)

Notifies this layer that a span with the ID span recorded that it follows from the span with the ID follows.
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fn event_enabled(&self, _event: &Event<'_>, _ctx: Context<'_, S>) -> bool

Called before on_event, to determine if on_event should be called.
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fn on_event(&self, _event: &Event<'_>, _ctx: Context<'_, S>)

Notifies this layer that an event has occurred.
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fn on_enter(&self, _id: &Id, _ctx: Context<'_, S>)

Notifies this layer that a span with the given ID was entered.
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fn on_exit(&self, _id: &Id, _ctx: Context<'_, S>)

Notifies this layer that the span with the given ID was exited.
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fn on_close(&self, _id: Id, _ctx: Context<'_, S>)

Notifies this layer that the span with the given ID has been closed.
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fn on_id_change(&self, _old: &Id, _new: &Id, _ctx: Context<'_, S>)

Notifies this layer that a span ID has been cloned, and that the subscriber returned a different ID.
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fn and_then<L>(self, layer: L) -> Layered<L, Self, S>
where L: Layer<S>, Self: Sized,

Composes this layer around the given Layer, returning a Layered struct implementing Layer. Read more
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fn with_subscriber(self, inner: S) -> Layered<Self, S>
where Self: Sized,

Composes this Layer with the given Subscriber, returning a Layered struct that implements Subscriber. Read more
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fn with_filter<F>(self, filter: F) -> Filtered<Self, F, S>
where Self: Sized, F: Filter<S>,

Combines self with a Filter, returning a Filtered layer. Read more

Auto Trait Implementations§

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impl<S, F> RefUnwindSafe for ErrorLayer<S, F>
where F: RefUnwindSafe,

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impl<S, F> Send for ErrorLayer<S, F>
where F: Send,

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impl<S, F> Sync for ErrorLayer<S, F>
where F: Sync,

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impl<S, F> Unpin for ErrorLayer<S, F>
where F: Unpin,

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impl<S, F> UnwindSafe for ErrorLayer<S, F>
where F: 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> 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, 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<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