Struct tracing_core::span::Attributes [−][src]
Attributes provided to a Subscriber
describing a new span when it is
created.
Implementations
impl<'a> Attributes<'a>
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pub fn new(
metadata: &'static Metadata<'static>,
values: &'a ValueSet<'a>
) -> Self
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metadata: &'static Metadata<'static>,
values: &'a ValueSet<'a>
) -> Self
Returns Attributes
describing a new child span of the current span,
with the provided metadata and values.
pub fn new_root(
metadata: &'static Metadata<'static>,
values: &'a ValueSet<'a>
) -> Self
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metadata: &'static Metadata<'static>,
values: &'a ValueSet<'a>
) -> Self
Returns Attributes
describing a new span at the root of its own trace
tree, with the provided metadata and values.
pub fn child_of(
parent: Id,
metadata: &'static Metadata<'static>,
values: &'a ValueSet<'a>
) -> Self
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parent: Id,
metadata: &'static Metadata<'static>,
values: &'a ValueSet<'a>
) -> Self
Returns Attributes
describing a new child span of the specified
parent span, with the provided metadata and values.
pub fn metadata(&self) -> &'static Metadata<'static>
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Returns a reference to the new span’s metadata.
pub fn values(&self) -> &ValueSet<'a>
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Returns a reference to a ValueSet
containing any values the new span
was created with.
pub fn is_root(&self) -> bool
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Returns true if the new span should be a root.
pub fn is_contextual(&self) -> bool
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Returns true if the new span’s parent should be determined based on the current context.
If this is true and the current thread is currently inside a span, then that span should be the new span’s parent. Otherwise, if the current thread is not inside a span, then the new span will be the root of its own trace tree.
pub fn parent(&self) -> Option<&Id>
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Returns the new span’s explicitly-specified parent, if there is one.
Otherwise (if the new span is a root or is a child of the current span), returns false.
pub fn record(&self, visitor: &mut dyn Visit)
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Records all the fields in this set of Attributes
with the provided
Visitor.
pub fn contains(&self, field: &Field) -> bool
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Returns true
if this set of Attributes
contains a value for the
given Field
.
pub fn is_empty(&self) -> bool
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Returns true if this set of Attributes
contains no values.
pub fn fields(&self) -> &FieldSet
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Returns the set of all fields defined by this span’s Metadata
.
Note that the FieldSet
returned by this method includes all the
fields declared by this span, not just those with values that are recorded
as part of this set of Attributes
. Other fields with values not present in
this Attributes
’ value set may record values later.
Trait Implementations
Auto Trait Implementations
impl<'a> !RefUnwindSafe for Attributes<'a>
impl<'a> !Send for Attributes<'a>
impl<'a> !Sync for Attributes<'a>
impl<'a> Unpin for Attributes<'a>
impl<'a> !UnwindSafe for Attributes<'a>
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, U> Into<U> for T where
U: From<T>,
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U: From<T>,
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>,