[GitHub] [skywalking] youzhagui2006 commented on issue #7434: how to implement asynchronous tracking of the webclient in WebFlux.

[GitBox <gi...@apache.org>]

youzhagui2006 commented on issue #7434:
URL: https://github.com/apache/skywalking/issues/7434#issuecomment-942971312


   > Please answer these questions before submitting your issue.
   > 
   > * Why do you submit this issue?
   > * [ * ] Question or discussion
   > 
   > ### Question
   > * What do you want to know?
   >   hi ，Mr Wu.
   >   We want to implement asynchronous tracking of the webclient in WebFlux.
   >   So we try to modify the WebFluxWebClientInterceptor in spring-webflux-5.x-webclient-plugin.
   >   The code is as follows:
   > 
   > ```
   > public void beforeMethod(EnhancedInstance objInst, Method method, Object[] allArguments, Class<?>[] argumentsTypes, MethodInvocationContext context) throws Throwable {
   >         if (allArguments[0] == null) {
   >             //illegal args,can't trace ignore
   >             return;
   >         }
   >        // ################# here are the code we injected###########################
   >         LOGGER.info("getSkyWalkingDynamicField-------------{}", objInst.getSkyWalkingDynamicField());
   >         for (int i = 0; i < allArguments.length; i++) {
   >             LOGGER.info("----allArguments[{}]-----{}---------", i, allArguments[i]);
   >         }
   >         ClientRequest request = (ClientRequest) allArguments[0];
   >         final ContextCarrier contextCarrier = new ContextCarrier();
   > 
   >         URI uri = request.url();
   >         final String requestURIString = getRequestURIString(uri);
   >         final String operationName = requestURIString;
   >         final String remotePeer = getIPAndPort(uri);
   >         AbstractSpan span = ContextManager.createExitSpan(operationName, contextCarrier, remotePeer);
   > 
   >         //set components name
   >         span.setComponent(ComponentsDefine.SPRING_WEBCLIENT);
   >         Tags.URL.set(span, uri.toString());
   >         Tags.HTTP.METHOD.set(span, request.method().toString());
   >         SpanLayer.asHttp(span);
   > 
   >         if (request instanceof EnhancedInstance) {
   >             ((EnhancedInstance) request).setSkyWalkingDynamicField(contextCarrier);
   >         }
   > 
   >         //user async interface
   >         span.prepareForAsync();
   >         ContextManager.stopSpan();
   > 
   >         context.setContext(span);
   >     }
   > ```
   > 
   > We would like to use objInst.getSkyWalkingDynamicField() to get the traceid, but always get null.
   > 
   > May I ask if this method is feasible to get the traceid of the webclient ? Or give me some suggestion，please.
   
   请问你解决没？我也碰到了


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