Yangsx-1 commented on code in PR #1704:
URL: https://github.com/apache/kvrocks/pull/1704#discussion_r1310455430
##########
src/commands/cmd_stream.cc:
##########
@@ -205,6 +206,88 @@ class CommandXDel : public Commander {
std::vector<redis::StreamEntryID> ids_;
};
+class CommandXGroup : public Commander {
+ public:
+ Status Parse(const std::vector<std::string> &args) override {
+ CommandParser parser(args, 1);
+ subcommand_ = util::ToLower(GET_OR_RET(parser.TakeStr()));
+ stream_name_ = GET_OR_RET(parser.TakeStr());
+ group_name_ = GET_OR_RET(parser.TakeStr());
+
+ if (subcommand_ == "create") {
+ if (args.size() < 5 || args.size() > 8) {
+ return {Status::RedisParseErr, errWrongNumOfArguments};
+ }
+
+ xgroup_create_options_.last_id = GET_OR_RET(parser.TakeStr());
+
+ while (parser.Good()) {
+ if (parser.EatEqICase("mkstream")) {
+ xgroup_create_options_.mkstream = true;
+ } else if (parser.EatEqICase("entriesread")) {
+ auto parse_result = parser.TakeInt<int64_t>();
+ if (!parse_result.IsOK()) {
+ return {Status::RedisParseErr, errValueNotInteger};
+ }
+ if (parse_result.GetValue() < 0 && parse_result.GetValue() != -1) {
+ return {Status::RedisParseErr, "value for ENTRIESREAD must be
positive or -1"};
+ }
+ xgroup_create_options_.entries_read = parse_result.GetValue();
+ } else {
+ return parser.InvalidSyntax();
+ }
+ }
+
+ return Status::OK();
+ }
+
+ if (subcommand_ == "destroy") {
+ if (args.size() != 4) {
+ return {Status::RedisParseErr, errWrongNumOfArguments};
+ }
+
+ return Status::OK();
+ }
+
+ return {Status::RedisParseErr, "unknown subcommand"};
+ }
+
+ Status Execute(Server *svr, Connection *conn, std::string *output) override {
+ redis::Stream stream_db(svr->storage, conn->GetNamespace());
+
+ if (subcommand_ == "create") {
+ auto s = stream_db.CreateGroup(stream_name_, xgroup_create_options_,
group_name_);
+ if (!s.ok()) {
+ return {Status::RedisExecErr, s.ToString()};
+ }
+
+ *output = redis::SimpleString("OK");
+ }
+
+ if (subcommand_ == "destroy") {
+ uint64_t delete_cnt = 0;
+ auto s = stream_db.DestroyGroup(stream_name_, group_name_, &delete_cnt);
+ if (!s.ok()) {
+ return {Status::RedisExecErr, s.ToString()};
+ }
+
+ if (delete_cnt > 0) {
Review Comment:
It can only be 0 or 1.
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