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final Map<String, String> properties = new HashMap<String, String>();
properties.put(Tracer.SPAN_RECEIVER_CLASSES_KEY, ...);
properties.put(Tracer.SAMPLER_CLASSES_KEY, ...);

/**
 * For example:
 *
 * properties.put(Tracer.SPAN_RECEIVER_CLASSES_KEY, StandardOutSpanReceiver.class.getName());
 * properties.put(Tracer.SAMPLER_CLASSES_KEY, AlwaysSampler.class.getName());
 */
        
final Tracer tracer = new Tracer.Builder()
    .name("web-client")
    .conf(HTraceConfiguration.fromMap(properties))
    .build();
                
final HTraceClientProvider provider = new HTraceClientProvider(tracer);
final Response response = WebClient
    .create("http://localhost:9000/catalog", Arrays.asList(provider))
    .accept(MediaType.APPLICATION_JSON)
    .get();

final Map<String, String> properties = new HashMap<String, String>();
properties.put(Tracer.SPAN_RECEIVER_CLASSES_KEY, ...);
properties.put(Tracer.SAMPLER_CLASSES_KEY, ...);

/**
 * For example:
 *
 * properties.put(Tracer.SPAN_RECEIVER_CLASSES_KEY, StandardOutSpanReceiver.class.getName());
 * properties.put(Tracer.SAMPLER_CLASSES_KEY, AlwaysSampler.class.getName());
 */
        
final Tracer tracer = new Tracer.Builder()
    .name("jaxrs-client")
    .conf(HTraceConfiguration.fromMap(properties))
    .build();
                
final HTraceClientProvider provider = new HTraceClientProvider(tracer);
final Client client = ClientBuilder.newClient().register(provider);

final Response response = client
    .target("http://localhost:8282/rest/api/people")
    .request()
    .accept(MediaType.APPLICATION_JSON)
    .get();