@Override
  public void onTrigger(final ProcessContext context, final ProcessSession session)
      throws ProcessException {
    final List<FlowFile> flowFiles = session.get(50);
    if (flowFiles.isEmpty()) {
      return;
    }

    final ProcessorLog logger = getLogger();
    try {
      if (fileWatcher.checkAndReset()) {
        this.dictionaryTerms = createDictionary(context);
      }
    } catch (final IOException e) {
      logger.error("Unable to reload dictionary due to {}", e);
    }

    final boolean matchAll =
        context.getProperty(MATCHING_CRITERIA).getValue().equals(MATCH_CRITERIA_ALL);

    for (final FlowFile flowFile : flowFiles) {
      final boolean matched =
          matchAll
              ? allMatch(flowFile, attributePattern, dictionaryTerms)
              : anyMatch(flowFile, attributePattern, dictionaryTerms);
      final Relationship relationship = matched ? REL_MATCHED : REL_UNMATCHED;
      session.getProvenanceReporter().route(flowFile, relationship);
      session.transfer(flowFile, relationship);
      logger.info("Transferred {} to {}", new Object[] {flowFile, relationship});
    }
  }
  @Override
  public void onTrigger(final ProcessContext context, final ProcessSession session) {
    FlowFile flowFile = session.get();
    if (flowFile == null) {
      return;
    }

    final ProcessorLog logger = getLogger();

    boolean encode = context.getProperty(MODE).getValue().equalsIgnoreCase(ENCODE_MODE);
    String encoding = context.getProperty(ENCODING).getValue();
    StreamCallback encoder = null;

    // Select the encoder/decoder to use
    if (encode) {
      if (encoding.equalsIgnoreCase(BASE64_ENCODING)) {
        encoder = new EncodeBase64();
      } else if (encoding.equalsIgnoreCase(BASE32_ENCODING)) {
        encoder = new EncodeBase32();
      } else if (encoding.equalsIgnoreCase(HEX_ENCODING)) {
        encoder = new EncodeHex();
      }
    } else {
      if (encoding.equalsIgnoreCase(BASE64_ENCODING)) {
        encoder = new DecodeBase64();
      } else if (encoding.equalsIgnoreCase(BASE32_ENCODING)) {
        encoder = new DecodeBase32();
      } else if (encoding.equalsIgnoreCase(HEX_ENCODING)) {
        encoder = new DecodeHex();
      }
    }

    if (encoder == null) {
      logger.warn(
          "Unknown operation: {} {}", new Object[] {encode ? "encode" : "decode", encoding});
      return;
    }

    try {
      final StopWatch stopWatch = new StopWatch(true);
      flowFile = session.write(flowFile, encoder);

      logger.info("Successfully {} {}", new Object[] {encode ? "encoded" : "decoded", flowFile});
      session
          .getProvenanceReporter()
          .modifyContent(flowFile, stopWatch.getElapsed(TimeUnit.MILLISECONDS));
      session.transfer(flowFile, REL_SUCCESS);
    } catch (Exception e) {
      logger.error(
          "Failed to {} {} due to {}", new Object[] {encode ? "encode" : "decode", flowFile, e});
      session.transfer(flowFile, REL_FAILURE);
    }
  }
  @Override
  public void onTrigger(final ProcessContext context, final ProcessSession session) {
    final boolean sendAsFlowFile = context.getProperty(SEND_AS_FLOWFILE).asBoolean();
    final int compressionLevel = context.getProperty(COMPRESSION_LEVEL).asInteger();
    final String userAgent = context.getProperty(USER_AGENT).getValue();

    final RequestConfig.Builder requestConfigBuilder = RequestConfig.custom();
    requestConfigBuilder.setConnectionRequestTimeout(
        context.getProperty(DATA_TIMEOUT).asTimePeriod(TimeUnit.MILLISECONDS).intValue());
    requestConfigBuilder.setConnectTimeout(
        context.getProperty(CONNECTION_TIMEOUT).asTimePeriod(TimeUnit.MILLISECONDS).intValue());
    requestConfigBuilder.setRedirectsEnabled(false);
    requestConfigBuilder.setSocketTimeout(
        context.getProperty(DATA_TIMEOUT).asTimePeriod(TimeUnit.MILLISECONDS).intValue());
    final RequestConfig requestConfig = requestConfigBuilder.build();

    final StreamThrottler throttler = throttlerRef.get();
    final ProcessorLog logger = getLogger();

    final Double maxBatchBytes = context.getProperty(MAX_BATCH_SIZE).asDataSize(DataUnit.B);
    String lastUrl = null;
    long bytesToSend = 0L;

    final List<FlowFile> toSend = new ArrayList<>();
    DestinationAccepts destinationAccepts = null;
    CloseableHttpClient client = null;
    final String transactionId = UUID.randomUUID().toString();

    final ObjectHolder<String> dnHolder = new ObjectHolder<>("none");
    while (true) {
      FlowFile flowFile = session.get();
      if (flowFile == null) {
        break;
      }

      final String url = context.getProperty(URL).evaluateAttributeExpressions(flowFile).getValue();
      try {
        new java.net.URL(url);
      } catch (final MalformedURLException e) {
        logger.error(
            "After substituting attribute values for {}, URL is {}; this is not a valid URL, so routing to failure",
            new Object[] {flowFile, url});
        flowFile = session.penalize(flowFile);
        session.transfer(flowFile, REL_FAILURE);
        continue;
      }

      // If this FlowFile doesn't have the same url, throw it back on the queue and stop grabbing
      // FlowFiles
      if (lastUrl != null && !lastUrl.equals(url)) {
        session.transfer(flowFile);
        break;
      }

      lastUrl = url;
      toSend.add(flowFile);

      if (client == null || destinationAccepts == null) {
        final Config config = getConfig(url, context);
        final HttpClientConnectionManager conMan = config.getConnectionManager();

        final HttpClientBuilder clientBuilder = HttpClientBuilder.create();
        clientBuilder.setConnectionManager(conMan);
        clientBuilder.setUserAgent(userAgent);
        clientBuilder.addInterceptorFirst(
            new HttpResponseInterceptor() {
              @Override
              public void process(final HttpResponse response, final HttpContext httpContext)
                  throws HttpException, IOException {
                HttpCoreContext coreContext = HttpCoreContext.adapt(httpContext);
                ManagedHttpClientConnection conn =
                    coreContext.getConnection(ManagedHttpClientConnection.class);
                if (!conn.isOpen()) {
                  return;
                }

                SSLSession sslSession = conn.getSSLSession();

                if (sslSession != null) {
                  final X509Certificate[] certChain = sslSession.getPeerCertificateChain();
                  if (certChain == null || certChain.length == 0) {
                    throw new SSLPeerUnverifiedException("No certificates found");
                  }

                  final X509Certificate cert = certChain[0];
                  dnHolder.set(cert.getSubjectDN().getName().trim());
                }
              }
            });

        clientBuilder.disableAutomaticRetries();
        clientBuilder.disableContentCompression();

        final String username = context.getProperty(USERNAME).getValue();
        final String password = context.getProperty(PASSWORD).getValue();
        // set the credentials if appropriate
        if (username != null) {
          final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
          if (password == null) {
            credentialsProvider.setCredentials(
                AuthScope.ANY, new UsernamePasswordCredentials(username));
          } else {
            credentialsProvider.setCredentials(
                AuthScope.ANY, new UsernamePasswordCredentials(username, password));
          }
          clientBuilder.setDefaultCredentialsProvider(credentialsProvider);
        }
        client = clientBuilder.build();

        // determine whether or not destination accepts flowfile/gzip
        destinationAccepts = config.getDestinationAccepts();
        if (destinationAccepts == null) {
          try {
            if (sendAsFlowFile) {
              destinationAccepts =
                  getDestinationAcceptance(client, url, getLogger(), transactionId);
            } else {
              destinationAccepts = new DestinationAccepts(false, false, false, false, null);
            }

            config.setDestinationAccepts(destinationAccepts);
          } catch (IOException e) {
            flowFile = session.penalize(flowFile);
            session.transfer(flowFile, REL_FAILURE);
            logger.error(
                "Unable to communicate with destination {} to determine whether or not it can accept "
                    + "flowfiles/gzip; routing {} to failure due to {}",
                new Object[] {url, flowFile, e});
            context.yield();
            return;
          }
        }
      }

      // if we are not sending as flowfile, or if the destination doesn't accept V3 or V2
      // (streaming) format,
      // then only use a single FlowFile
      if (!sendAsFlowFile
          || (!destinationAccepts.isFlowFileV3Accepted()
              && !destinationAccepts.isFlowFileV2Accepted())) {
        break;
      }

      bytesToSend += flowFile.getSize();
      if (bytesToSend > maxBatchBytes.longValue()) {
        break;
      }
    }

    if (toSend.isEmpty()) {
      return;
    }

    final String url = lastUrl;
    final HttpPost post = new HttpPost(url);
    final List<FlowFile> flowFileList = toSend;
    final DestinationAccepts accepts = destinationAccepts;
    final boolean isDestinationLegacyNiFi = accepts.getProtocolVersion() == null;

    final EntityTemplate entity =
        new EntityTemplate(
            new ContentProducer() {
              @Override
              public void writeTo(final OutputStream rawOut) throws IOException {
                final OutputStream throttled =
                    (throttler == null) ? rawOut : throttler.newThrottledOutputStream(rawOut);
                OutputStream wrappedOut = new BufferedOutputStream(throttled);
                if (compressionLevel > 0 && accepts.isGzipAccepted()) {
                  wrappedOut = new GZIPOutputStream(wrappedOut, compressionLevel);
                }

                try (final OutputStream out = wrappedOut) {
                  for (final FlowFile flowFile : flowFileList) {
                    session.read(
                        flowFile,
                        new InputStreamCallback() {
                          @Override
                          public void process(final InputStream rawIn) throws IOException {
                            try (final InputStream in = new BufferedInputStream(rawIn)) {

                              FlowFilePackager packager = null;
                              if (!sendAsFlowFile) {
                                packager = null;
                              } else if (accepts.isFlowFileV3Accepted()) {
                                packager = new FlowFilePackagerV3();
                              } else if (accepts.isFlowFileV2Accepted()) {
                                packager = new FlowFilePackagerV2();
                              } else if (accepts.isFlowFileV1Accepted()) {
                                packager = new FlowFilePackagerV1();
                              }

                              // if none of the above conditions is met, we should never get here,
                              // because
                              // we will have already verified that at least 1 of the FlowFile
                              // packaging
                              // formats is acceptable if sending as FlowFile.
                              if (packager == null) {
                                StreamUtils.copy(in, out);
                              } else {
                                final Map<String, String> flowFileAttributes;
                                if (isDestinationLegacyNiFi) {
                                  // Old versions of NiFi expect nf.file.name and nf.file.path to
                                  // indicate filename & path;
                                  // in order to maintain backward compatibility, we copy the
                                  // filename & path to those attribute keys.
                                  flowFileAttributes = new HashMap<>(flowFile.getAttributes());
                                  flowFileAttributes.put(
                                      "nf.file.name",
                                      flowFile.getAttribute(CoreAttributes.FILENAME.key()));
                                  flowFileAttributes.put(
                                      "nf.file.path",
                                      flowFile.getAttribute(CoreAttributes.PATH.key()));
                                } else {
                                  flowFileAttributes = flowFile.getAttributes();
                                }

                                packager.packageFlowFile(
                                    in, out, flowFileAttributes, flowFile.getSize());
                              }
                            }
                          }
                        });
                  }

                  out.flush();
                }
              }
            });

    entity.setChunked(context.getProperty(CHUNKED_ENCODING).asBoolean());
    post.setEntity(entity);
    post.setConfig(requestConfig);

    final String contentType;
    if (sendAsFlowFile) {
      if (accepts.isFlowFileV3Accepted()) {
        contentType = APPLICATION_FLOW_FILE_V3;
      } else if (accepts.isFlowFileV2Accepted()) {
        contentType = APPLICATION_FLOW_FILE_V2;
      } else if (accepts.isFlowFileV1Accepted()) {
        contentType = APPLICATION_FLOW_FILE_V1;
      } else {
        logger.error(
            "Cannot send data to {} because the destination does not accept FlowFiles and this processor is "
                + "configured to deliver FlowFiles; rolling back session",
            new Object[] {url});
        session.rollback();
        context.yield();
        return;
      }
    } else {
      final String attributeValue = toSend.get(0).getAttribute(CoreAttributes.MIME_TYPE.key());
      contentType = (attributeValue == null) ? DEFAULT_CONTENT_TYPE : attributeValue;
    }

    final String attributeHeaderRegex = context.getProperty(ATTRIBUTES_AS_HEADERS_REGEX).getValue();
    if (attributeHeaderRegex != null && !sendAsFlowFile && flowFileList.size() == 1) {
      final Pattern pattern = Pattern.compile(attributeHeaderRegex);

      final Map<String, String> attributes = flowFileList.get(0).getAttributes();
      for (final Map.Entry<String, String> entry : attributes.entrySet()) {
        final String key = entry.getKey();
        if (pattern.matcher(key).matches()) {
          post.setHeader(entry.getKey(), entry.getValue());
        }
      }
    }

    post.setHeader(CONTENT_TYPE, contentType);
    post.setHeader(FLOWFILE_CONFIRMATION_HEADER, "true");
    post.setHeader(PROTOCOL_VERSION_HEADER, PROTOCOL_VERSION);
    post.setHeader(TRANSACTION_ID_HEADER, transactionId);
    if (compressionLevel > 0 && accepts.isGzipAccepted()) {
      post.setHeader(GZIPPED_HEADER, "true");
    }

    // Do the actual POST
    final String flowFileDescription =
        toSend.size() <= 10 ? toSend.toString() : toSend.size() + " FlowFiles";

    final String uploadDataRate;
    final long uploadMillis;
    CloseableHttpResponse response = null;
    try {
      final StopWatch stopWatch = new StopWatch(true);
      response = client.execute(post);

      // consume input stream entirely, ignoring its contents. If we
      // don't do this, the Connection will not be returned to the pool
      EntityUtils.consume(response.getEntity());
      stopWatch.stop();
      uploadDataRate = stopWatch.calculateDataRate(bytesToSend);
      uploadMillis = stopWatch.getDuration(TimeUnit.MILLISECONDS);
    } catch (final IOException e) {
      logger.error(
          "Failed to Post {} due to {}; transferring to failure",
          new Object[] {flowFileDescription, e});
      context.yield();
      for (FlowFile flowFile : toSend) {
        flowFile = session.penalize(flowFile);
        session.transfer(flowFile, REL_FAILURE);
      }
      return;
    } finally {
      if (response != null) {
        try {
          response.close();
        } catch (IOException e) {
          getLogger().warn("Failed to close HTTP Response due to {}", new Object[] {e});
        }
      }
    }

    // If we get a 'SEE OTHER' status code and an HTTP header that indicates that the intent
    // of the Location URI is a flowfile hold, we will store this holdUri. This prevents us
    // from posting to some other webservice and then attempting to delete some resource to which
    // we are redirected
    final int responseCode = response.getStatusLine().getStatusCode();
    final String responseReason = response.getStatusLine().getReasonPhrase();
    String holdUri = null;
    if (responseCode == HttpServletResponse.SC_SEE_OTHER) {
      final Header locationUriHeader = response.getFirstHeader(LOCATION_URI_INTENT_NAME);
      if (locationUriHeader != null) {
        if (LOCATION_URI_INTENT_VALUE.equals(locationUriHeader.getValue())) {
          final Header holdUriHeader = response.getFirstHeader(LOCATION_HEADER_NAME);
          if (holdUriHeader != null) {
            holdUri = holdUriHeader.getValue();
          }
        }
      }

      if (holdUri == null) {
        for (FlowFile flowFile : toSend) {
          flowFile = session.penalize(flowFile);
          logger.error(
              "Failed to Post {} to {}: sent content and received status code {}:{} but no Hold URI",
              new Object[] {flowFile, url, responseCode, responseReason});
          session.transfer(flowFile, REL_FAILURE);
        }
        return;
      }
    }

    if (holdUri == null) {
      if (responseCode == HttpServletResponse.SC_SERVICE_UNAVAILABLE) {
        for (FlowFile flowFile : toSend) {
          flowFile = session.penalize(flowFile);
          logger.error(
              "Failed to Post {} to {}: response code was {}:{}; will yield processing, "
                  + "since the destination is temporarily unavailable",
              new Object[] {flowFile, url, responseCode, responseReason});
          session.transfer(flowFile, REL_FAILURE);
        }
        context.yield();
        return;
      }

      if (responseCode >= 300) {
        for (FlowFile flowFile : toSend) {
          flowFile = session.penalize(flowFile);
          logger.error(
              "Failed to Post {} to {}: response code was {}:{}",
              new Object[] {flowFile, url, responseCode, responseReason});
          session.transfer(flowFile, REL_FAILURE);
        }
        return;
      }

      logger.info(
          "Successfully Posted {} to {} in {} at a rate of {}",
          new Object[] {
            flowFileDescription,
            url,
            FormatUtils.formatMinutesSeconds(uploadMillis, TimeUnit.MILLISECONDS),
            uploadDataRate
          });

      for (final FlowFile flowFile : toSend) {
        session
            .getProvenanceReporter()
            .send(flowFile, url, "Remote DN=" + dnHolder.get(), uploadMillis, true);
        session.transfer(flowFile, REL_SUCCESS);
      }
      return;
    }

    //
    // the response indicated a Hold URI; delete the Hold.
    //
    // determine the full URI of the Flow File's Hold; Unfortunately, the responses that are
    // returned have
    // changed over the past, so we have to take into account a few different possibilities.
    String fullHoldUri = holdUri;
    if (holdUri.startsWith("/contentListener")) {
      // If the Hold URI that we get starts with /contentListener, it may not really be
      // /contentListener,
      // as this really indicates that it should be whatever we posted to -- if posting directly to
      // the
      // ListenHTTP component, it will be /contentListener, but if posting to a proxy/load balancer,
      // we may
      // be posting to some other URL.
      fullHoldUri = url + holdUri.substring(16);
    } else if (holdUri.startsWith("/")) {
      // URL indicates the full path but not hostname or port; use the same hostname & port that we
      // posted
      // to but use the full path indicated by the response.
      int firstSlash = url.indexOf("/", 8);
      if (firstSlash < 0) {
        firstSlash = url.length();
      }
      final String beforeSlash = url.substring(0, firstSlash);
      fullHoldUri = beforeSlash + holdUri;
    } else if (!holdUri.startsWith("http")) {
      // Absolute URL
      fullHoldUri = url + (url.endsWith("/") ? "" : "/") + holdUri;
    }

    final HttpDelete delete = new HttpDelete(fullHoldUri);
    delete.setHeader(TRANSACTION_ID_HEADER, transactionId);

    while (true) {
      try {
        final HttpResponse holdResponse = client.execute(delete);
        EntityUtils.consume(holdResponse.getEntity());
        final int holdStatusCode = holdResponse.getStatusLine().getStatusCode();
        final String holdReason = holdResponse.getStatusLine().getReasonPhrase();
        if (holdStatusCode >= 300) {
          logger.error(
              "Failed to delete Hold that destination placed on {}: got response code {}:{}; routing to failure",
              new Object[] {flowFileDescription, holdStatusCode, holdReason});

          for (FlowFile flowFile : toSend) {
            flowFile = session.penalize(flowFile);
            session.transfer(flowFile, REL_FAILURE);
          }
          return;
        }

        logger.info(
            "Successfully Posted {} to {} in {} milliseconds at a rate of {}",
            new Object[] {flowFileDescription, url, uploadMillis, uploadDataRate});

        for (FlowFile flowFile : toSend) {
          session.getProvenanceReporter().send(flowFile, url);
          session.transfer(flowFile, REL_SUCCESS);
        }
        return;
      } catch (final IOException e) {
        logger.warn(
            "Failed to delete Hold that destination placed on {} due to {}",
            new Object[] {flowFileDescription, e});
      }

      if (!isScheduled()) {
        context.yield();
        logger.warn(
            "Failed to delete Hold that destination placed on {}; Processor has been stopped so routing FlowFile(s) to failure",
            new Object[] {flowFileDescription});
        for (FlowFile flowFile : toSend) {
          flowFile = session.penalize(flowFile);
          session.transfer(flowFile, REL_FAILURE);
        }
        return;
      }
    }
  }
  @Override
  public void onTrigger(final ProcessContext context, final ProcessSession session)
      throws ProcessException {

    FlowFile flowFile = session.get();
    if (flowFile == null) {
      return;
    }

    final ProcessorLog logger = getLogger();

    // cache key is computed from attribute 'CACHE_ENTRY_IDENTIFIER' with expression language
    // support
    final String cacheKey =
        context
            .getProperty(CACHE_ENTRY_IDENTIFIER)
            .evaluateAttributeExpressions(flowFile)
            .getValue();

    // if the computed value is null, or empty, we transfer the flow file to failure relationship
    if (StringUtils.isBlank(cacheKey)) {
      logger.error(
          "FlowFile {} has no attribute for given Cache Entry Identifier", new Object[] {flowFile});
      flowFile = session.penalize(flowFile);
      session.transfer(flowFile, REL_FAILURE);
      return;
    }

    // the cache client used to interact with the distributed cache
    final DistributedMapCacheClient cache =
        context
            .getProperty(DISTRIBUTED_CACHE_SERVICE)
            .asControllerService(DistributedMapCacheClient.class);

    try {

      final long maxCacheEntrySize =
          context.getProperty(CACHE_ENTRY_MAX_BYTES).asDataSize(DataUnit.B).longValue();
      long flowFileSize = flowFile.getSize();

      // too big flow file
      if (flowFileSize > maxCacheEntrySize) {
        logger.warn(
            "Flow file {} size {} exceeds the max cache entry size ({} B).",
            new Object[] {flowFile, flowFileSize, maxCacheEntrySize});
        session.transfer(flowFile, REL_FAILURE);
        return;
      }

      if (flowFileSize == 0) {
        logger.warn("Flow file {} is empty, there is nothing to cache.", new Object[] {flowFile});
        session.transfer(flowFile, REL_FAILURE);
        return;
      }

      // get flow file content
      final ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
      session.exportTo(flowFile, byteStream);
      byte[] cacheValue = byteStream.toByteArray();
      final String updateStrategy = context.getProperty(CACHE_UPDATE_STRATEGY).getValue();
      boolean cached = false;

      if (updateStrategy.equals(CACHE_UPDATE_REPLACE.getValue())) {
        cache.put(cacheKey, cacheValue, keySerializer, valueSerializer);
        cached = true;
      } else if (updateStrategy.equals(CACHE_UPDATE_KEEP_ORIGINAL.getValue())) {
        final byte[] oldValue =
            cache.getAndPutIfAbsent(
                cacheKey, cacheValue, keySerializer, valueSerializer, valueDeserializer);
        if (oldValue == null) {
          cached = true;
        }
      }

      // set 'cached' attribute
      flowFile = session.putAttribute(flowFile, CACHED_ATTRIBUTE_NAME, String.valueOf(cached));

      if (cached) {
        session.transfer(flowFile, REL_SUCCESS);
      } else {
        session.transfer(flowFile, REL_FAILURE);
      }

    } catch (final IOException e) {
      flowFile = session.penalize(flowFile);
      session.transfer(flowFile, REL_FAILURE);
      logger.error(
          "Unable to communicate with cache when processing {} due to {}",
          new Object[] {flowFile, e});
    }
  }
  public void consume(
      final ProcessContext context,
      final ProcessSession session,
      final WrappedMessageConsumer wrappedConsumer)
      throws ProcessException {
    final ProcessorLog logger = getLogger();

    final MessageConsumer consumer = wrappedConsumer.getConsumer();
    final boolean clientAcknowledge =
        context.getProperty(ACKNOWLEDGEMENT_MODE).getValue().equalsIgnoreCase(ACK_MODE_CLIENT);
    final long timeout = context.getProperty(TIMEOUT).asTimePeriod(TimeUnit.MILLISECONDS);
    final boolean addAttributes = context.getProperty(JMS_PROPS_TO_ATTRIBUTES).asBoolean();
    final int batchSize = context.getProperty(BATCH_SIZE).asInteger();

    final JmsProcessingSummary processingSummary = new JmsProcessingSummary();

    final StopWatch stopWatch = new StopWatch(true);
    for (int i = 0; i < batchSize; i++) {

      final Message message;
      try {
        // If we haven't received a message, wait until one is available. If we have already
        // received at least one
        // message, then we are not willing to wait for more to become available, but we are willing
        // to keep receiving
        // all messages that are immediately available.
        if (processingSummary.getMessagesReceived() == 0) {
          message = consumer.receive(timeout);
        } else {
          message = consumer.receiveNoWait();
        }
      } catch (final JMSException e) {
        logger.error("Failed to receive JMS Message due to {}", e);
        wrappedConsumer.close(logger);
        break;
      }

      if (message == null) { // if no messages, we're done
        break;
      }

      try {
        processingSummary.add(map2FlowFile(context, session, message, addAttributes, logger));
      } catch (Exception e) {
        logger.error("Failed to receive JMS Message due to {}", e);
        wrappedConsumer.close(logger);
        break;
      }
    }

    if (processingSummary.getFlowFilesCreated() == 0) {
      context.yield();
      return;
    }

    session.commit();

    stopWatch.stop();
    if (processingSummary.getFlowFilesCreated() > 0) {
      final float secs = ((float) stopWatch.getDuration(TimeUnit.MILLISECONDS) / 1000F);
      float messagesPerSec = ((float) processingSummary.getMessagesReceived()) / secs;
      final String dataRate = stopWatch.calculateDataRate(processingSummary.getBytesReceived());
      logger.info(
          "Received {} messages in {} milliseconds, at a rate of {} messages/sec or {}",
          new Object[] {
            processingSummary.getMessagesReceived(),
            stopWatch.getDuration(TimeUnit.MILLISECONDS),
            messagesPerSec,
            dataRate
          });
    }

    // if we need to acknowledge the messages, do so now.
    final Message lastMessage = processingSummary.getLastMessageReceived();
    if (clientAcknowledge && lastMessage != null) {
      try {
        lastMessage
            .acknowledge(); // acknowledge all received messages by acknowledging only the last.
      } catch (final JMSException e) {
        logger.error(
            "Failed to acknowledge {} JMS Message(s). This may result in duplicate messages. Reason for failure: {}",
            new Object[] {processingSummary.getMessagesReceived(), e});
      }
    }
  }