Package brave.propagation

Interface TraceContext.Injector<R>

Enclosing class:
TraceContext
public static interface TraceContext.Injector<R>
Used to send the trace context downstream. For example, as http headers.

For example, to put the context on an HttpURLConnection, you can do this: 


 // in your constructor
 injector = tracing.propagation().injector(URLConnection::setRequestProperty);

 // later in your code, reuse the function you created above to add trace headers
 HttpURLConnection connection = (HttpURLConnection) new URL("http://myserver").openConnection();
 injector.inject(span.context(), connection);

Note: This type is safe to implement as a lambda, or use as a method reference as it is effectively a FunctionalInterface. It isn't annotated as such because the project has a minimum Java language level 6.

Since:
4.0

  • Method Summary

    Modifier and Type Method Description
    void inject​(TraceContext traceContext, R request)
    Usually calls a setter for each propagation field to send downstream.

  • Method Details

    • inject

      void inject​(TraceContext traceContext, R request)
      Usually calls a setter for each propagation field to send downstream.
      Parameters:
      traceContext - possibly unsampled.
      request - holds propagation fields. For example, an outgoing message or http request.