Method AsParent

src/brpc/span.h:108–110

Set this span as the TLS parent for subsequent child span creation. Typical flow: 1. Server span calls AsParent() before user callback to enable tracing 2. Client spans created in user code automatically link to this parent 3. When client RPC completes, it restores its own parent via AsParent() to maintain the trace chain (see Controller::SubmitSpan) 4. Server span calls EndAsParent() when submitt

    //    to maintain the trace chain (see Controller::SubmitSpan)
    // 4. Server span calls EndAsParent() when submitting to clear TLS parent
    void AsParent() {
        SetTlsParentSpan(shared_from_this());
    }

    // Add log with time.
    void Annotate(const char* fmt, ...);