Struct tracing_subscriber::layer::Layered

pub struct Layered<L, I, S = I> { /* fields omitted */ }

A Subscriber composed of a Subscriber wrapped by one or more Layers.

Trait Implementations

impl<S, A, B> Layer<S> for Layered<A, B, S> where
    A: Layer<S>,
    B: Layer<S>,
    S: Subscriber, 

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].

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].

fn 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.

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.

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.

fn on_event(&self, event: &Event, ctx: Context<S>)

Notifies this layer that an event has occurred.

fn on_enter(&self, id: &Id, ctx: Context<S>)

Notifies this layer that a span with the given ID was entered.

fn on_exit(&self, id: &Id, ctx: Context<S>)

Notifies this layer that the span with the given ID was exited.

fn on_close(&self, id: Id, ctx: Context<S>)

Notifies this layer that the span with the given ID has been closed.

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.

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.

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].

impl<L: Clone, I: Clone, S: Clone> Clone for Layered<L, I, S>

fn clone(&self) -> Layered<L, I, S>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<L: Debug, I: Debug, S: Debug> Debug for Layered<L, I, S>

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

Formats the value using the given formatter.

impl<L, S> Subscriber for Layered<L, S> where
    L: Layer<S>,
    S: Subscriber, 

fn register_callsite(&self, metadata: &'static Metadata<'static>) -> Interest

Registers a new callsite with this subscriber, returning whether or not the subscriber is interested in being notified about the callsite.

fn enabled(&self, metadata: &Metadata) -> bool

Returns true if a span or event with the specified [metadata] would be recorded.

fn new_span(&self, span: &Attributes) -> Id

Visit the construction of a new span, returning a new [span ID] for the span being constructed.

fn record(&self, span: &Id, values: &Record)

Record a set of values on a span.

fn record_follows_from(&self, span: &Id, follows: &Id)

Adds an indication that span follows from the span with the id follows.

fn event(&self, event: &Event)

Records that an [Event] has occurred.

fn enter(&self, span: &Id)

Records that a span has been entered.

fn exit(&self, span: &Id)

Records that a span has been exited.

fn clone_span(&self, old: &Id) -> Id

Notifies the subscriber that a [span ID] has been cloned.

fn drop_span(&self, id: Id)

Deprecated since 0.1.2:

use Subscriber::try_close instead

This method is soft-deprecated.

fn try_close(&self, id: Id) -> bool

Notifies the subscriber that a [span ID] has been dropped, and returns true if there are now 0 IDs that refer to that span.

fn current_span(&self) -> Current

Returns a type representing this subscriber's view of the current span.

unsafe fn downcast_raw(&self, id: TypeId) -> Option<*const ()>

If self is the same type as the provided TypeId, returns an untyped *const pointer to that type. Otherwise, returns None.