本文整理了Java中brave.Tracer.withSampler()方法的一些代码示例，展示了Tracer.withSampler()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Tracer.withSampler()方法的具体详情如下：
包路径：brave.Tracer
类名称：Tracer
方法名：withSampler

Tracer.withSampler介绍

[英]Use this to temporarily override the sampler used when starting new traces. This also serves advanced scenarios, such as DeclarativeSampler.

Simple example:

// Ensures new traces are always started

[中]使用此选项可临时覆盖开始新记录道时使用的采样器。这也适用于高级场景，例如DeclarativeSampler。
简单的例子：

// Ensures new traces are always started

代码示例

代码示例来源：origin: openzipkin/brave

/**
 * Creates a potentially noop span representing this request. This is used when you need to
 * provision a span in a different scope than where the request is executed.
 *
 * @since 4.4
 */
public Span nextSpan(Req request) {
 Sampler override = httpSampler.toSampler(adapter, request, sampler);
 return tracer.withSampler(override).nextSpan();
}

代码示例来源：origin: openzipkin/brave

@Test public void propagatesExtra_unsampledTrace() throws Exception {
 Tracer tracer = httpTracing.tracing().tracer().withSampler(Sampler.NEVER_SAMPLE);
 server.enqueue(new MockResponse());
 ScopedSpan parent = tracer.startScopedSpan("test");
 try {
  ExtraFieldPropagation.set(parent.context(), EXTRA_KEY, "joey");
  get(client, "/foo");
 } finally {
  parent.finish();
 }
 assertThat(server.takeRequest().getHeader(EXTRA_KEY))
   .isEqualTo("joey");
}

代码示例来源：origin: io.zipkin.brave/brave-core

/**
 * Returns a span representing the sampled status of the current server span or null if there's no
 * span attached to the current thread.
 */
@Nullable
public static brave.Span getServerSpan(Tracer tracer, ServerSpanThreadBinder threadBinder) {
 if (tracer == null) throw new NullPointerException("tracer == null");
 if (threadBinder == null) throw new NullPointerException("threadBinder == null");
 ServerSpan result = threadBinder.getCurrentServerSpan();
 if (result == null || result.equals(ServerSpan.EMPTY)) return null;
 if (result.getSpan() != null) return toSpan(tracer, result.getSpan());
 assert result.getSample() != null && !result.getSample() : "unexpected sample state: " + result;
 return tracer.withSampler(Sampler.NEVER_SAMPLE).newTrace();
}

代码示例来源：origin: io.zipkin.brave/brave-instrumentation-http-tests

@Test public void propagatesExtra_unsampledTrace() throws Exception {
 Tracer tracer = httpTracing.tracing().tracer().withSampler(Sampler.NEVER_SAMPLE);
 server.enqueue(new MockResponse());
 ScopedSpan parent = tracer.startScopedSpan("test");
 try {
  ExtraFieldPropagation.set(parent.context(), EXTRA_KEY, "joey");
  get(client, "/foo");
 } finally {
  parent.finish();
 }
 assertThat(server.takeRequest().getHeader(EXTRA_KEY))
   .isEqualTo("joey");
}

代码示例来源：origin: openzipkin-contrib/brave-opentracing

Integer samplingPriority = Integer.valueOf(sampling);
if (samplingPriority == 0) {
 scopedBraveTracer = braveTracer.withSampler(Sampler.NEVER_SAMPLE);
} else if (samplingPriority > 0) {
 scopedBraveTracer = braveTracer.withSampler(Sampler.ALWAYS_SAMPLE);