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  1. Couchbase Documentation
  2. DOC-3711

Failure Considerations: every language have difference code example

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      At the bottom of the page there is code sample.
      the code sample vary between languages and the getFromReplica part is reactive to a different exception which make it very difficult to determine when to use that piece of code.

      for example, .Net is reacting to KeyNotFound (which is incorrect):

      const string key = "ReplicaKey";
      		 
       var value = bucket.Get<string>(key);
      		 
       if (value.Status == ResponseStatus.KeyNotFound)
      		 
      { 
      var result = bucket.GetFromReplica<string>(key); //do something with the result
      		 
       }

       

      Java - to any Couchbase Exception (which is incorrect as well): static JsonDocument

      getOrGetReplica(Bucket bucket, String docId) { 
      try { return bucket.get(docId); 
      } catch (CouchbaseException e) {
      		 
       Iterator<JsonDocument> docs = bucket.getFromReplica(docId);
      		 
       return docs.hasNext() ? docs.next() : null; 
      } 
      }

       

      Python - to networkError:

      try:
      		 
       result = cb.get("docid")
      		 
       except CouchbaseNetworkError as e:
      		 
       print "Got error. Fetching from replica!"
      		 
       result = cb.get(‘docid’, replica=True)

      Node.js to a general couchbaseException:

      static JsonDocument getOrGetReplica(Bucket bucket, String docId) {
      		 
       try { return bucket.get(docId); }
      		 
      catch (CouchbaseException e)
      		 
      { Iterator<JsonDocument> docs = bucket.getFromReplica(docId); return docs.hasNext() ? docs.next() : null; }
      		 
      }

       

      It needed to be clear what is the scenario Couchbase recommending to use it.

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          has to be done after

          Task - A task that needs to be done. PCBC-558 GetFromReplica / Failure Considerations

          • Major - Major loss of function.
          • Open

          Task - A task that needs to be done. PYCBC-516 GetFromReplica / Failure Considerations

          • Major - Major loss of function.
          • Open

          Task - A task that needs to be done. GOCBC-338 GetFromReplica / Failure Considerations

          • Major - Major loss of function.
          • Resolved

          Task - A task that needs to be done. JCBC-1228 GetFromReplica / Failure Considerations

          • Major - Major loss of function.
          • Resolved

          Task - A task that needs to be done. JSCBC-494 GetFromReplica / Failure Considerations

          • Major - Major loss of function.
          • Resolved

          Task - A task that needs to be done. NCBC-1741 GetFromReplica / Failure Considerations

          • Major - Major loss of function.
          • Resolved

          Task - A task that needs to be done. CCBC-962 GetFromReplica / Failure Considerations

          • Major - Major loss of function.
          • Closed
          relates to

          Task - A task that needs to be done. DOC-2828 Address other cases in which a replica read should be used based on the ResponseStatus that is returned by the SDK.

          • Major - Major loss of function.
          • Closed
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              richard.smedley Richard Smedley
              roi.katz Roi Katz
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