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spring-bootspring-cloud-sleuth

Spring Cloud Sleuth- Get current traceId?

I am using Sleuth and I am wondering is it possible to get the current traceId? I dont need to add it any responses or anything. I just want the traceId for emails alerting the development team in certain situations.

Solution

  • Inject the Tracer bean and call tracer.currentSpan() to get the current span. From there you can get the trace id.

    Please use Sleuth's API - that way regardless of which Tracer library you're using (Brave / OTel) your code will remain the same.

    Example:

    import org.springframework.cloud.sleuth.Span;
import org.springframework.cloud.sleuth.Tracer;

@Component
public class TraceService {

    private final Tracer tracer;

    public TraceService(Tracer tracer) {
        this.tracer = tracer;
    }

    public String traceId() {
        Span span = tracer.currentSpan();
        String traceId = span.context().traceId();
        System.out.println(traceId);
        return traceId;
    }

}