SpringCloud/spring-cloud-sleuth
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2018-09-07 12:29:26 +00:00
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@@ -449,7 +449,7 @@ for you to create a bean of that type and we will set it in the <code class="lit
The following example shows how to propagate <code class="literal">x-vcap-request-id</code> the field as-is but send the <code class="literal">country-code</code> and <code class="literal">user-id</code> fields on the wire as <code class="literal">x-baggage-country-code</code> and <code class="literal">x-baggage-user-id</code>, respectively:</p><pre class="programlisting">Tracing.newBuilder().propagationFactory(
ExtraFieldPropagation.newFactoryBuilder(B3Propagation.FACTORY)
.addField(<span xmlns:d="http://docbook.org/ns/docbook" class="hl-string">"x-vcap-request-id"</span>)
.addPrefixedFields(<span xmlns:d="http://docbook.org/ns/docbook" class="hl-string">"baggage-"</span>, Arrays.asList(<span xmlns:d="http://docbook.org/ns/docbook" class="hl-string">"country-code"</span>, <span xmlns:d="http://docbook.org/ns/docbook" class="hl-string">"user-id"</span>))
.addPrefixedFields(<span xmlns:d="http://docbook.org/ns/docbook" class="hl-string">"x-baggage-"</span>, Arrays.asList(<span xmlns:d="http://docbook.org/ns/docbook" class="hl-string">"country-code"</span>, <span xmlns:d="http://docbook.org/ns/docbook" class="hl-string">"user-id"</span>))
.build()
);</pre><p>Later, you can call the following code to affect the country code of the current trace context:</p><pre class="programlisting">ExtraFieldPropagation.set(<span xmlns:d="http://docbook.org/ns/docbook" class="hl-string">"country-code"</span>, <span xmlns:d="http://docbook.org/ns/docbook" class="hl-string">"FO"</span>);
String countryCode = ExtraFieldPropagation.get(<span xmlns:d="http://docbook.org/ns/docbook" class="hl-string">"country-code"</span>);</pre><p>Alternatively, if you have a reference to a trace context, you can use it explicitly, as shown in the following example:</p><pre class="programlisting">ExtraFieldPropagation.set(span.context(), <span xmlns:d="http://docbook.org/ns/docbook" class="hl-string">"country-code"</span>, <span xmlns:d="http://docbook.org/ns/docbook" class="hl-string">"FO"</span>);