Struct Dispatch

pub struct Dispatch { /* private fields */ }

Dispatch trace data to a Subscriber.

Implementations

impl Dispatch

pub fn none() -> Dispatch

Returns a new Dispatch that discards events and spans.

pub fn new<S>(subscriber: S) -> Dispatch

where S: Subscriber + Send + Sync + 'static,

Returns a Dispatch that forwards to the given Subscriber.

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

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

This calls the register_callsite function on the Subscriber that this Dispatch forwards to.

pub fn new_span(&self, span: &Attributes<'_>) -> Id

Record the construction of a new span, returning a new ID for the span being constructed.

This calls the new_span function on the Subscriber that this Dispatch forwards to.

pub fn record(&self, span: &Id, values: &Record<'_>)

Record a set of values on a span.

This calls the record function on the Subscriber that this Dispatch forwards to.

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

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

This calls the record_follows_from function on the Subscriber that this Dispatch forwards to.

pub fn enabled(&self, metadata: &Metadata<'_>) -> bool

Returns true if a span with the specified metadata would be recorded.

This calls the enabled function on the Subscriber that this Dispatch forwards to.

pub fn event(&self, event: &Event<'_>)

Records that an Event has occurred.

This calls the event function on the Subscriber that this Dispatch forwards to.

pub fn enter(&self, span: &Id)

Records that a span has been can_enter.

This calls the [enter] function on the Subscriber that this Dispatch forwards to.

pub fn exit(&self, span: &Id)

Records that a span has been exited.

This calls the exit function on the Subscriber that this Dispatch forwards to.

pub fn clone_span(&self, id: &Id) -> Id

Notifies the subscriber that a span ID has been cloned.

This function is guaranteed to only be called with span IDs that were returned by this Dispatch’s new_span function.

This calls the clone_span function on the Subscriber that this Dispatch forwards to.

pub fn drop_span(&self, id: Id)

Notifies the subscriber that a span ID has been dropped.

This function is guaranteed to only be called with span IDs that were returned by this Dispatch’s new_span function.

This calls the [drop_span] function on the Subscriber that this Dispatch forwards to.

pub fn is<T>(&self) -> bool

where T: Any,

Returns true if this Dispatch forwards to a Subscriber of type T.

pub fn downcast_ref<T>(&self) -> Option<&T>

where T: Any,

Returns some reference to the Subscriber this Dispatch forwards to if it is of type T, or None if it isn’t.

Trait Implementations

impl Clone for Dispatch

fn clone(&self) -> Dispatch

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Dispatch

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

Formats the value using the given formatter.

impl<S> From<S> for Dispatch

where S: Subscriber + Send + Sync + 'static,

fn from(subscriber: S) -> Dispatch

Converts to this type from the input type.