Package brave.propagation

Interface Propagation.RemoteGetter<R>

Type Parameters:

R - usually Request, such as an HTTP server request or message

All Superinterfaces:

Propagation.Getter<R,String>

Enclosing interface:

Propagation<K>

public static interface Propagation.RemoteGetter<R>
extends Propagation.Getter<R,String>

Used as an input to Propagation.extractor(Getter) extract the trace context and any baggage from propagated fields.

Since:

5.12

See Also:

Propagation.RemoteSetter

Method Summary

Modifier and Type	Method	Description
String	get(R request, String fieldName)	Gets the propagation field as a single value.
Span.Kind	spanKind()	The only valid options are Span.Kind.SERVER, Span.Kind.PRODUCER, and Span.Kind.CONSUMER.

Method Detail

spanKind

Span.Kind spanKind()

The only valid options are Span.Kind.SERVER, Span.Kind.PRODUCER, and Span.Kind.CONSUMER.

Since:

5.12

See Also:

Request.spanKind()

get

@Nullable
String get(R request,
           String fieldName)

Gets the propagation field as a single value.

Note: HTTP only permits multiple header fields with the same name when the format is a comma-separated list. An HTTP implementation of this method will assume presence of multiple values is valid and join them with a comma. See RFC 7230 for more.

Specified by:

get in interface Propagation.Getter<R,String>

Parameters:

request - see {@link #}

fieldName - typically a header name

Returns:

the value of the field or null

Since:

5.12