Struct PropagatorContext 

#[non_exhaustive]
pub struct PropagatorContext {
    pub request_headers: HashMap<String, Vec<String>>,
    pub metadata: HashMap<String, Value>,
}

Extension data extracted by ServerPropagator for downstream propagation.

Aligned with Go’s internal propagatorContext struct.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

request_headers: HashMap<String, Vec<String>>

HTTP headers to propagate (key → values).

metadata: HashMap<String, Value>

Payload metadata to propagate (key → value).

Implementations

impl PropagatorContext

pub fn current() -> Option<Self>

Reads the current task-local propagator context, if set.

pub fn install(self) -> bool

Stores this context in the task-local cell.

Requires that the current task is running within init_propagation. Returns true if stored successfully.

pub async fn scope<F: Future>(self, f: F) -> F::Output

Executes a future with this context directly available via task-local.

This is a convenience wrapper for simple cases where you already have the context and want to make it available to ClientPropagator.

Trait Implementations

impl Clone for PropagatorContext

fn clone(&self) -> PropagatorContext

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PropagatorContext

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

Formats the value using the given formatter.

impl Default for PropagatorContext

fn default() -> PropagatorContext

Returns the “default value” for a type.