SpringCloud 本地追蹤

跟蹤永遠不會離開進程的代碼時，請在范圍范圍內(nèi)運行它。

@Autowired Tracer tracer;

// Start a new trace or a span within an existing trace representing an operation
ScopedSpan span = tracer.startScopedSpan("encode");
try {
  // The span is in "scope" meaning downstream code such as loggers can see trace IDs
  return encoder.encode();
} catch (RuntimeException | Error e) {
  span.error(e); // Unless you handle exceptions, you might not know the operation failed!
  throw e;
} finally {
  span.finish(); // always finish the span
}

當您需要更多功能或更好的控制時，請使用Span類型：

@Autowired Tracer tracer;

// Start a new trace or a span within an existing trace representing an operation
Span span = tracer.nextSpan().name("encode").start();
// Put the span in "scope" so that downstream code such as loggers can see trace IDs
try (SpanInScope ws = tracer.withSpanInScope(span)) {
  return encoder.encode();
} catch (RuntimeException | Error e) {
  span.error(e); // Unless you handle exceptions, you might not know the operation failed!
  throw e;
} finally {
  span.finish(); // note the scope is independent of the span. Always finish a span.
}

上面的兩個示例都報告了完全相同的跨度！

在上面的示例中，范圍將是新的根范圍或現(xiàn)有跟蹤中的下一個子級。