@Override protected void decode(ChannelHandlerContext ctx, RESPONSE msg, List<Object> out) throws Exception { if (currentDecodingState == DecodingState.INITIAL) { currentRequest = sentRequestQueue.poll(); currentDecodingState = DecodingState.STARTED; if (currentRequest != null) { Long st = sentRequestTimings.poll(); if (st != null) { currentOpTime = System.nanoTime() - st; } else { currentOpTime = -1; } } if (traceEnabled) { LOGGER.trace("{}Started decoding of {}", logIdent(ctx, endpoint), currentRequest); } } try { CouchbaseResponse response = decodeResponse(ctx, msg); if (response != null) { publishResponse(response, currentRequest.observable()); if (currentDecodingState == DecodingState.FINISHED) { if (currentRequest != null && currentOpTime >= 0 && env() != null && env().networkLatencyMetricsCollector().isEnabled()) { NetworkLatencyMetricsIdentifier identifier = new NetworkLatencyMetricsIdentifier( remoteHostname, serviceType().toString(), currentRequest.getClass().getSimpleName(), response.status().toString()); env().networkLatencyMetricsCollector().record(identifier, currentOpTime); } } } } catch (CouchbaseException e) { currentRequest.observable().onError(e); } catch (Exception e) { currentRequest.observable().onError(new CouchbaseException(e)); } if (currentDecodingState == DecodingState.FINISHED) { if (traceEnabled) { LOGGER.trace("{}Finished decoding of {}", logIdent(ctx, endpoint), currentRequest); } currentRequest = null; currentDecodingState = DecodingState.INITIAL; } }