io.opentelemetry.context.propagation

Interface TextMapPropagator.Getter<C>

Type Parameters:

C - carrier of propagation fields, such as an http request.

Enclosing interface:

TextMapPropagator

public static interface TextMapPropagator.Getter<C>

Interface that allows a TextMapPropagator to read propagated fields from a carrier.

Getter is stateless and allows to be saved as a constant to avoid runtime allocations.

Since:

0.1.0

Method Summary

Modifier and Type	Method and Description
String	get(C carrier, String key) Returns the first value of the given propagation key or returns null.

Method Detail

get

@Nullable
String get(C carrier,
                     String key)

Returns the first value of the given propagation key or returns null.

Parameters:

carrier - carrier of propagation fields, such as an http request.

key - the key of the field.

Returns:

the first value of the given propagation key or returns null.

Since:

0.1.0