org.springframework.cloud.sleuth.propagation

Interface Propagator.Getter<C>

Type Parameters:

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

Enclosing interface:

Propagator

public static interface Propagator.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.

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.