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Instrumentation of Java libraries using OpenTelemetry.

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/*
 * Copyright The OpenTelemetry Authors
 * SPDX-License-Identifier: Apache-2.0
 */

package io.opentelemetry.javaagent.instrumentation.netty.v3_8.server;

import io.opentelemetry.context.propagation.TextMapGetter;
import io.opentelemetry.javaagent.instrumentation.netty.v3_8.HttpRequestAndChannel;
import javax.annotation.Nullable;

enum NettyHeadersGetter implements TextMapGetter {
  INSTANCE;

  @Override
  public Iterable keys(HttpRequestAndChannel requestAndChannel) {
    return requestAndChannel.request().headers().names();
  }

  @Nullable
  @Override
  public String get(@Nullable HttpRequestAndChannel requestAndChannel, String s) {
    return requestAndChannel.request().headers().get(s);
  }
}