arpadboda commented on a change in pull request #712: MINIFICPP-1047 Add
property "Drop empty flow files" to PublishKafka
URL: https://github.com/apache/nifi-minifi-cpp/pull/712#discussion_r368581257
##########
File path: extensions/librdkafka/PublishKafka.cpp
##########
@@ -639,6 +647,17 @@ void PublishKafka::onTrigger(const
std::shared_ptr<core::ProcessContext> &contex
PublishKafka::ReadCallback callback(max_flow_seg_size, kafkaKey,
thisTopic->getTopic(), conn->getConnection(), flowFile,
attributeNameRegex, messages,
flow_file_index);
session->read(flowFile, &callback);
+
+ bool dropEmptyFlowFiles;
+ if (!callback.called_ &&
context->getProperty(DropEmptyFlowFiles.getName(), dropEmptyFlowFiles) &&
!dropEmptyFlowFiles) {
+ // workaround: call callback since ProcessSession doesn't do so for
empty flow files
+ logger_->log_debug("ReadCallback workaround on empty flow file, because
DropEmptyFlowFiles is false, uuid: %s", flowFile->getUUIDStr());
+ callback.process(nullptr);
+ }
+ if (!callback.called_ && dropEmptyFlowFiles) {
+ logger_->log_info("Deprecated behavior, use connections to drop empty
flow files! Dropped empty flow file with uuid: %s", flowFile->getUUIDStr());
Review comment:
Fair point :)
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