Struct replicante_util_tracing::carriers::reqwest::HeadersCarrier

pub struct HeadersCarrier<'a> { /* private fields */ }

Implement the MapCarrier trait for Reqwest’s HeaderMap.

Examples

Inject a span context:

use replicante_util_tracing::carriers::reqwest::HeadersCarrier;

let mut headers = HeaderMap::new();
HeadersCarrier::inject(span.context(), &mut headers, &tracer);

Optionally extract a context:

use replicante_util_tracing::carriers::reqwest::HeadersCarrier;

let mut response = Response::new();
HeadersCarrier::extract(span.context(), &response.headers, &tracer);

Implementations

impl<'a> HeadersCarrier<'a>

pub fn new(headers: &'a mut HeaderMap) -> HeadersCarrier<'a>

Mutably borrow a response so it can be serialised.

pub fn inject(
    context: &SpanContext,
    headers: &mut HeaderMap,
    tracer: &Tracer
) -> OTResult<()>

Inject a SpanContext into the given Iron headers.

pub fn extract(
    headers: &mut HeaderMap,
    tracer: &Tracer
) -> OTResult<Option<SpanContext>>

Checks the headers for a span context and extract it if possible.

Trait Implementations

impl<'a> MapCarrier for HeadersCarrier<'a>

fn items(&self) -> Vec<(&String, &String)>

List all items stored in the carrier as (key, value) pairs.

fn get(&self, key: &str) -> Option<String>

Attempt to fetch an exact key from the carrier.

fn set(&mut self, key: &str, value: &str)

Set a key/value pair on the carrier.