Struct HumanLayer 

pub struct HumanLayer<W = LineWriter<Stderr>, S = LayerStyles> { /* private fields */ }

A human-friendly tracing_subscriber::Layer.

Implementations

impl HumanLayer

pub fn new() -> Self

Construct a new HumanLayer that writes to Stderr.

impl<W, S> HumanLayer<W, S>

pub fn with_output_writer<W2>(self, output_writer: W2) -> HumanLayer<W2, S>

Set the writer that log messages are written to.

This does not change colored output by default.

The output_writer should implement std::io::Write for the HumanLayer to implement tracing_subscriber::Layer.

pub fn with_textwrap_options( self, textwrap_options: Option<TextWrapOptionsOwned>, ) -> Self

Set the textwrap::Options.

If None, no text wrapping is performed.

pub fn with_color_output(self, color_output: bool) -> Self

Set the output coloring.

pub fn with_span_events(self, span_events: FmtSpan) -> Self

Set which span events are logged.

pub fn with_style_provider<S2>(self, styles: S2) -> HumanLayer<W, S2>

Set the output style to the given ProvideStyle implementation, which supplies Styles.

Trait Implementations

impl<W, S> Debug for HumanLayer<W, S>

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

Formats the value using the given formatter.

impl Default for HumanLayer

fn default() -> Self

Returns the “default value” for a type.

impl<Sub, Wr, Sty> Layer<Sub> for HumanLayer<Wr, Sty>

where Sub: Subscriber + for<'lookup> LookupSpan<'lookup>, Self: 'static, Wr: Write, Sty: ProvideStyle,

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

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

fn on_record(&self, id: &Id, values: &Record<'_>, ctx: Context<'_, Sub>)

Notifies this layer that a span with the given Id recorded the given values.

fn on_event(&self, event: &Event<'_>, ctx: Context<'_, Sub>)

Notifies this layer that an event has occurred.

fn on_enter(&self, id: &Id, ctx: Context<'_, Sub>)

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

fn on_exit(&self, id: &Id, ctx: Context<'_, Sub>)

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

fn on_close(&self, id: Id, ctx: Context<'_, Sub>)

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

fn on_register_dispatch(&self, subscriber: &Dispatch)

Performs late initialization when installing this layer as a Subscriber.

fn on_layer(&mut self, subscriber: &mut S)

Performs late initialization when attaching a Layer to a 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 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 event_enabled(&self, _event: &Event<'_>, _ctx: Context<'_, S>) -> bool

Called before on_event, to determine if on_event should be called.

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.

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.

fn boxed(self) -> Box<dyn Layer<S> + Send + Sync>

where Self: Sized + Layer<S> + Send + Sync + 'static, S: Subscriber,

Erases the type of this Layer, returning a Boxed dyn Layer trait object.