Package org.apache.juneau.rest.server.tracing.otel

Class RestRequestTextMapGetter

java.lang.Object

org.apache.juneau.rest.server.tracing.otel.RestRequestTextMapGetter

All Implemented Interfaces:

io.opentelemetry.context.propagation.TextMapGetter<RestRequest>

public final class RestRequestTextMapGetter
extends Object
implements io.opentelemetry.context.propagation.TextMapGetter<RestRequest>

TextMapGetter implementation that reads HTTP request headers from a RestRequest.

Used by OtelTracerHook to extract W3C traceparent / tracestate headers (and any other propagator-defined headers, e.g. baggage) from incoming requests so the server span can be created as a child of the caller's trace context.

Header lookups are case-insensitive at the underlying RequestHeaderList, matching the RFC 9110 contract.

Since:

10.0.0

Field Summary

Fields

Modifier and Type	Field	Description
static final RestRequestTextMapGetter	INSTANCE	Process-wide singleton instance.

Method Summary

Modifier and Type	Method	Description
String	get(RestRequest carrier, String key)
Iterable<String>	keys(RestRequest carrier)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.opentelemetry.context.propagation.TextMapGetter

getAll

Field Details

INSTANCE

public static final RestRequestTextMapGetter INSTANCE

Process-wide singleton instance.

Method Details

keys

public Iterable<String> keys(RestRequest carrier)

Specified by:

keys in interface io.opentelemetry.context.propagation.TextMapGetter<RestRequest>

get

public String get(RestRequest carrier,
 String key)

Specified by:

get in interface io.opentelemetry.context.propagation.TextMapGetter<RestRequest>