BewareMyPower commented on code in PR #228:
URL: https://github.com/apache/pulsar-client-cpp/pull/228#discussion_r1147117852
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lib/ConsumerImpl.cc:
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@@ -649,10 +649,11 @@ void ConsumerImpl::executeNotifyCallback(Message& msg) {
void ConsumerImpl::notifyBatchPendingReceivedCallback(const
BatchReceiveCallback& callback) {
auto messages =
std::make_shared<MessagesImpl>(batchReceivePolicy_.getMaxNumMessages(),
batchReceivePolicy_.getMaxNumBytes());
- Message peekMsg;
- while (incomingMessages_.pop(peekMsg, std::chrono::milliseconds(0)) &&
messages->canAdd(peekMsg)) {
- messageProcessed(peekMsg);
- Message interceptMsg =
interceptors_->beforeConsume(Consumer(shared_from_this()), peekMsg);
+ Message msg;
+ while (incomingMessages_.peek(msg) && messages->canAdd(msg)) {
+ incomingMessages_.pop(msg);
Review Comment:
The combination of `peek` and `pop` is not atomic. So you have to use a lock
to synchronize these two operations.
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