[GitHub] [skywalking] Karlzzb commented on issue #3738: how to link multispans to the same traceId

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

Karlzzb commented on issue #3738: how to link multispans to the same traceId
URL: https://github.com/apache/skywalking/issues/3738#issuecomment-547708899
 
 
   Thanks for responding
   
   
   1. The code for sending message
   
   ```java
           X.XMessage rawMessage = (X.XMessage) allArguments[0];
           X.XHeader header = rawMessage.getHeader();
           ContextCarrier contextCarrier  = new ContextCarrier();
           RequestURI request = RequestURI.create(header.getUri());
           AbstractSpan span = ContextManager.createExitSpan(header.getTag(), contextCarrier, request.getGroupId());
           Tags.URL.set(span,header.getUri());
           X.XHeader.Builder newHeader = header.toBuilder();
           newHeader.setTrackId(contextCarrier.getDistributedTraceId().encode());
           span.setOperationName("sent out Message【"+newHeader.getTrackId()+"】");
           span.setComponent(ComponentsDefine.UNDERTOW);
           new StringTag(Constans.CARRIER_LEGION_TRACK_ID_KEY).set(span,newHeader.getTrackId());
           CarrierItem next = contextCarrier.items();
           while (next.hasNext()) {
               next = next.next();
               System.out.println("message=["+header.getTrackId()+"]  traceId=["+contextCarrier.getDistributedTraceId().encode()+"]  sent contextCarrier key="+next.getHeadKey()+",value="+next.getHeadValue());
               newHeader.putContextCarrier(next.getHeadKey(), next.getHeadValue());
           }
           rawMessage = rawMessage.toBuilder().setHeader(newHeader).build();
           allArguments[0] = rawMessage;
   ```
   
   2. The code for handler receiving message
   
   ```java
           X.XMessage rawMessage = (X.XMessage) allArguments[0];
           X.XHeader header = rawMessage.getHeader();
           RequestURI request = RequestURI.create(header.getUri());
           System.out.println("X contextCarrier ="+header.getContextCarrierCount());
           for(Map.Entry e : header.getContextCarrierMap().entrySet()) {
               System.out.println("X contextCarrier key="+e.getKey()+",value="+e.getValue());
           }
           ContextCarrier contextCarrier  = new ContextCarrier();
           CarrierItem next = contextCarrier.items();
           while (next.hasNext()) {
               next = next.next();
               String contextValue = header.getContextCarrierOrDefault(next.getHeadKey(),"");
               if (!StringUtil.isEmpty(contextValue)) {
                   System.out.println("receive message ["+header.getTrackId()+"] contextCarrier got key="+next.getHeadKey()+",value="+contextValue);
                   next.setHeadValue(contextValue);
               }
           }
           List<DistributedTraceId> distributedTraceIds = new ArrayList();
           distributedTraceIds.add(new PropagatedTraceId(header.getTrackId()));
           contextCarrier.setDistributedTraceIds(distributedTraceIds);
           AbstractSpan span = ContextManager.createEntrySpan(header.getTag(), contextCarrier);
           new StringTag(Constans.CARRIER_LEGION_TRACK_ID_KEY).set(span,header.getTrackId());
           span.setOperationName("handler Message【"+header.getTrackId()+"】");
           span.setPeer(header.getModuleSource().getGroupId());
           Tags.URL.set(span,header.getUri());
           span.setComponent(ComponentsDefine.UNDERTOW);
   ```

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
users@infra.apache.org


With regards,
Apache Git Services