Struct TraceContext

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pub struct TraceContext { /* private fields */ }
Expand description

Trace context that is propagated through HTTP headers to enable distributed tracing.

Currently still missing support for tracestate, otherwise compliant with https://www.w3.org/TR/trace-context-2/#design-overview, which standardizes how context information is sent and modified between services.

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impl TraceContext

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pub fn new( trace_id: u128, span_id: u64, sampled: bool, state: Option<String>, ) -> Self

Construct a new trace context.

Version 0 of the trace context specification only supports the sampled flag, so we can offer a bool input for this flag.

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pub fn new_sampled(trace_id: u128, span_id: u64, state: Option<String>) -> Self

Construct a new trace context with the sampled flag set to true.

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pub fn new_unsampled( trace_id: u128, span_id: u64, state: Option<String>, ) -> Self

Construct a new trace context with the sampled flag set to false.

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pub fn as_w3c_headers(&self) -> impl Iterator<Item = (&'static str, String)>

Render the context as w3c trace context headers.

https://www.w3.org/TR/trace-context-2

Trait Implementations§

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impl Clone for TraceContext

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fn clone(&self) -> TraceContext

Returns a duplicate of the value. Read more
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const fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Hash for TraceContext

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for TraceContext

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fn eq(&self, other: &TraceContext) -> bool

Tests for self and other values to be equal, and is used by ==.
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const fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Eq for TraceContext

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impl StructuralPartialEq for TraceContext

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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fn equivalent(&self, key: &K) -> bool

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Compare self to key and return true if they are equal.
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fn from(t: T) -> T

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type Init = T

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unsafe fn init(init: <T as Pointable>::Init) -> usize

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Create a new Policy that returns Action::Follow if either self or other returns Action::Follow. Read more
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