[GitHub] [skywalking-java] Chenfx-git commented on a diff in pull request #460: Fix servicecomb plugin trace break

["Chenfx-git (via GitHub)" <gi...@apache.org>]

Chenfx-git commented on code in PR #460:
URL: https://github.com/apache/skywalking-java/pull/460#discussion_r1111991291


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apm-sniffer/apm-sdk-plugin/servicecomb-plugin/servicecomb-java-chassis-2.x-plugin/src/main/java/org/apache/skywalking/apm/plugin/servicecomb/v2/ProducerOperationHandlerInterceptor.java:
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@@ -52,6 +52,13 @@ public void beforeMethod(EnhancedInstance objInst, Method method, Object[] allAr
         SpanLayer.asRPCFramework(span);
     }
 
+    private String getHeadValue(Invocation invocation, String key) {
+        if (invocation.getContext().containsKey("sw8")) {

Review Comment:
   How can i know trace message in http header or servicecomb context? How many kind of key in skywalking like sw8



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