git-hulk commented on code in PR #881:
URL: https://github.com/apache/incubator-kvrocks/pull/881#discussion_r973531504
##########
src/redis_cmd.cc:
##########
@@ -4132,6 +4132,52 @@ class CommandEcho : public Commander {
}
};
+class CommandHello final : public Commander {
+public:
+ Status Execute(Server *svr, Connection *conn, std::string *output) override {
+ std::cout << "Execute is called" << std::endl;
+ if (args_.size() == 2) {
+ int64_t protocol;
+ try {
+ protocol = std::stoll(args_[1]);
+ } catch (std::exception& e) {
+ // std::invalid_argument or std::out_of_range
+ *output = Redis::Error("Protocol version is not an integer or out of
range");
+ return Status::OK();
+ }
+
+ // In redis, it will check protocol < 2 or protocol > 3,
+ // but kvrocks only supports REPL2 by now.
+ if (protocol != 2) {
+ *output = Redis::Error("-NOPROTO unsupported protocol version");
+ return Status::OK();
+ }
+ }
+
+ // TODO(mapleFU): do we need to implement auth and setname?
Review Comment:
Yes, setname can use
[Connection::SetName](https://github.com/apache/incubator-kvrocks/blob/40132067bc7bb696f96675e8a396f0473321a454/src/redis_connection.h#L80)
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