Struct tracing_bunyan_formatter::JsonStorageLayer

pub struct JsonStorageLayer;

This layer is only concerned with information storage, it does not do any formatting or provide any output.

It’s purpose is to store the fields associated to spans in an easy-to-consume format for downstream layers concerned with emitting a formatted representation of spans or events.

Trait Implementations

impl Clone for JsonStorageLayer

fn clone(&self) -> JsonStorageLayer

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for JsonStorageLayer

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

Formats the value using the given formatter.

impl<S: Subscriber + for<'a> LookupSpan<'a>> Layer<S> for JsonStorageLayer

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

Span creation. This is the only occasion we have to store the fields attached to the span given that they might have been borrowed from the surrounding context.

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_enter(&self, span: &Id, ctx: Context<'_, S>)

When we enter a span for the first time save the timestamp in its extensions.

fn on_close(&self, span: Id, ctx: Context<'_, S>)

When we close a span, register how long it took in milliseconds.

pub 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.

pub 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.

pub 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.

pub fn on_event(&self, _event: &Event<'_>, _ctx: Context<'_, S>)

Notifies this layer that an event has occurred.

pub fn on_exit(&self, _id: &Id, _ctx: Context<'_, S>)

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

pub 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.

pub fn and_then<L>(self, layer: L) -> Layered<L, Self, S> where
    L: Layer<S>, 

Composes this layer around the given Layer, returning a Layered struct implementing Layer.

pub fn with_subscriber(self, inner: S) -> Layered<Self, S, S>

Composes this Layer with the given Subscriber, returning a Layered struct that implements Subscriber.