PragmaTwice commented on code in PR #1855:
URL: https://github.com/apache/kvrocks/pull/1855#discussion_r1374464238
##########
src/server/redis_connection.cc:
##########
@@ -74,6 +75,17 @@ void Connection::Close() {
void Connection::Detach() { owner_->DetachConnection(this); }
+bool Connection::IsBlockingMode() const {
+ if (current_cmd == nullptr) return false;
+ if (dynamic_cast<BlockingCommander *>(current_cmd.get()) != nullptr) return
true;
+
+ auto args = current_cmd->GetArgs();
+ if (args.empty()) return false;
+
+ std::string cmd_name = util::ToLower(args.front());
+ return cmd_name == "xread";
Review Comment:
Seems it can cause data race since `args` are used in multiple threads. And
the check `cmd_name == "xread"` is also a disaster of maintainability (we can
easily forget while facing new blocking commands).
So I think a better solution is add an new attribute like `blocking` to
these commands and check it here. Then we actually do not need `args` and even
`dynamic_cast`
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