[−][src]Struct tracing::Dispatch
Dispatch
trace data to a Subscriber
.
Implementations
impl Dispatch
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pub fn none() -> Dispatch
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Returns a new Dispatch
that discards events and spans.
pub fn new<S>(subscriber: S) -> Dispatch where
S: Subscriber + Send + Sync + 'static,
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S: Subscriber + Send + Sync + 'static,
Returns a Dispatch
that forwards to the given Subscriber
.
pub fn register_callsite(
&self,
metadata: &'static Metadata<'static>
) -> Interest
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&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.
This calls the register_callsite
function on the Subscriber
that this Dispatch
forwards to.
pub fn new_span(&self, span: &Attributes<'_>) -> Id
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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<'_>)
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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)
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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
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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<'_>)
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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)
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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)
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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
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Notifies the subscriber that a span ID has been cloned.
This function must only be called with span IDs that were returned by
this Dispatch
's new_span
function. The tracing
crate upholds
this guarantee and any other libraries implementing instrumentation APIs
must as well.
This calls the clone_span
function on the Subscriber
that this
Dispatch
forwards to.
pub fn drop_span(&self, id: Id)
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use Dispatch::try_close
instead
Notifies the subscriber that a span ID has been dropped.
This function must only be called with span IDs that were returned by
this Dispatch
's new_span
function. The tracing
crate upholds
this guarantee and any other libraries implementing instrumentation APIs
must as well.
This calls the drop_span
function on the Subscriber
that this
Dispatch
forwards to.
Deprecated: Thetry_close
method is functionally identical, but returnstrue
if the span is now closed. It should be used instead of this method.
pub fn try_close(&self, id: Id) -> bool
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Notifies the subscriber that a span ID has been dropped, and returns
true
if there are now 0 IDs referring to that span.
This function must only be called with span IDs that were returned by
this Dispatch
's new_span
function. The tracing
crate upholds
this guarantee and any other libraries implementing instrumentation APIs
must as well.
This calls the try_close
function on the Subscriber
that this
Dispatch
forwards to.
pub fn current_span(&self) -> Current
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Returns a type representing this subscriber's view of the current span.
This calls the current
function on the Subscriber
that this
Dispatch
forwards to.
pub fn is<T>(&self) -> bool where
T: Any,
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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,
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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
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impl Debug for Dispatch
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impl Default for Dispatch
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impl<S> From<S> for Dispatch where
S: Subscriber + Send + Sync + 'static,
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S: Subscriber + Send + Sync + 'static,
Auto Trait Implementations
impl !RefUnwindSafe for Dispatch
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impl Send for Dispatch
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impl Sync for Dispatch
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impl Unpin for Dispatch
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impl !UnwindSafe for Dispatch
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Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T> Instrument for T
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fn instrument(self, span: Span) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>
impl<T: Future> Future for Instrumented<T> type Output = T::Output;
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Notable traits for Instrumented<T>
impl<T: Future> Future for Instrumented<T> type Output = T::Output;
fn in_current_span(self) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>
impl<T: Future> Future for Instrumented<T> type Output = T::Output;
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Notable traits for Instrumented<T>
impl<T: Future> Future for Instrumented<T> type Output = T::Output;
impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,