Interface HeaderConsumer

All Superinterfaces:

HeaderProvider

public interface HeaderConsumer
extends HeaderProvider

API used to configure headers when propagating tracing information across service boundaries.

Method Summary

Modifier and Type	Method	Description
static HeaderConsumer	create(Map<String, List<String>> headers)	Create a header consumer over a map of headers (must be mutable).
void	set(String key, String... values)	Set the value(s).
void	setIfAbsent(String key, String... values)	Set the value(s) if not already set.

Methods inherited from interface HeaderProvider

contains, get, getAll, keys

Modifier and Type	Method	Description
boolean	contains(String key)	Whether a header is present.
Optional<String>	get(String key)	Get a header based on its name.
Iterable<String>	getAll(String key)	Get a header based on its name, returning all values.
Iterable<String>	keys()	All keys available in the headers (header names).

Method Details

create

static HeaderConsumer create(Map<String, List<String>> headers)

Create a header consumer over a map of headers (must be mutable).

Parameters:

headers - headers to update

Returns:

a new consumer

setIfAbsent

void setIfAbsent(String key,
 String... values)

Set the value(s) if not already set.

Parameters:

key - header name

values - header value(s)

set

void set(String key,
 String... values)

Set the value(s).

Parameters:

key - header name

values - header value(s)