com.wavefront.sdk.jaxrs.client.ClientHeadersInjectTextMap Maven / Gradle / Ivy

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package com.wavefront.sdk.jaxrs.client;

import java.util.Iterator;
import java.util.Map;

import javax.ws.rs.core.MultivaluedMap;

import io.opentracing.propagation.TextMap;

/**
 * Helper class used to add carrier data to HTTP headers.
 *
 * @author Hao Song ([email protected]).
 */
public class ClientHeadersInjectTextMap implements TextMap {

  private final MultivaluedMap headers;

  public ClientHeadersInjectTextMap(MultivaluedMap headers) {
    this.headers = headers;
  }

  @Override
  public Iterator> iterator() {
    throw new UnsupportedOperationException(
        ClientHeadersInjectTextMap.class.getName() + " should only be used with Tracer.inject()");
  }

  @Override
  public void put(String key, String value) {
    headers.add(key, value);
  }
}