@Override
    public SofaResponse invoke(FilterInvoker invoker, SofaRequest request) throws SofaRpcException {
        SofaTraceContext sofaTraceContext = SofaTraceContextHolder.getSofaTraceContext();
        SofaTracerSpan serverSpan = sofaTraceContext.getCurrentSpan();
        if (serverSpan != null) {
            ProviderConfig providerConfig = (ProviderConfig) invoker.getConfig();
            serverSpan.setTag(RpcSpanTags.LOCAL_APP, providerConfig.getAppName());
        }
        return invoker.invoke(request);

    }
@author <a href="mailto:zhanggeng.zg@antfin.com">zhanggeng</a>
tracer/tracer-opentracing/src/main/java/com/alipay/sofa/rpc/filter/sofatracer/ProviderTracerFilter.java