How to use

logEvent

method

in

org.springframework.cloud.sleuth.Span

  String getTimeAsString() {

    Span dateServiceSpan = this.tracer.createSpan("dateService");

    try {
      LOGGER.info("Returning time as String");
      dateServiceSpan.logEvent("This is my date service event");
      return LocalDateTime.now().toString();
    } finally {
      this.tracer.close(dateServiceSpan);
    }
  }
}

if (exception) {
  span.logEvent("motan request fail." + (ex == null ? "unknown exception" : ex.getMessage()));
} else {
    span.logEvent(Span.SERVER_SEND);
    span.logEvent(Span.CLIENT_RECV);

/**
 * process trace in server end
 * 
 * @param caller
 * @param request
 * @return
 */
protected Response processProviderTrace(Tracer tracer, Caller<?> caller, Request request) {
  Span span = extractTraceInfo(request, tracer);
  span.tag("requestId", String.valueOf(request.getRequestId()));
  span.logEvent(Span.SERVER_RECV);
  SleuthTracingContext.setActiveSpan(span);
  return process(tracer,caller, request, span);
}

span.logEvent(Span.CLIENT_SEND);
if(span.getSavedSpan()!=null && span.getSavedSpan().tags()!=null){
  for (Entry<String, String> stringStringEntry : span.getSavedSpan().tags().entrySet()) {

span = tracer.createSpan(spanName, parent);
if (parent.isRemote()) {
  parent.logEvent(Span.SERVER_RECV);
  span = tracer.createSpan(spanName);
span.logEvent(Span.SERVER_RECV);
  Span parent = span.getSavedSpan();
  if (parent.isRemote()) {
    parent.logEvent(Span.SERVER_SEND);
    parent.stop();
    spanReporter.report(parent);
  span.logEvent(Span.SERVER_SEND);

public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException {
  URL url = invoker.getUrl();
  String spanName = url.getServiceInterface() + "." + invocation.getMethodName();
  Span newSpan = tracer.createSpan(spanName);
  try {
    dubboSpanInjector.inject(newSpan, RpcContext.getContext());
    newSpan.logEvent(Span.CLIENT_SEND);
    return invoker.invoke(invocation);
  } catch (RpcException e) {
    newSpan.tag("error", e.getMessage());
    throw e;
  } finally {
    if (tracer.isTracing()) {
      tracer.getCurrentSpan().logEvent(Span.CLIENT_RECV);
      tracer.close(tracer.getCurrentSpan());
    }
  }
}