[feat][store] Supports online modification of the gflags variable via the curl command. Currently supports txn and gc settings.

Author: yuhaijun999

src/common/gflag_validator.h

@@ -0,0 +1,32 @@
+// Copyright (c) 2023 dingodb.com, Inc. All Rights Reserved
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef DINGODB_COMMON_GFLAG_VALIDATATOR_H_
+#define DINGODB_COMMON_GFLAG_VALIDATATOR_H_
+
+#include <gflags/gflags.h>
+#include <glog/logging.h>
+
+namespace dingodb {
+
+static bool PassDouble(const char*, double) { return true; }
+static bool PassInt64(const char*, int64_t) { return true; }
+static bool PassUint64(const char*, uint64_t) { return true; }
+static bool PassInt32(const char*, int32_t) { return true; }
+static bool PassUint32(const char*, uint32_t) { return true; }
+static bool PassBool(const char*, bool) { return true; }
+
+}  // namespace dingodb
+
+#endif  // DINGODB_COMMON_GFLAG_VALIDATATOR_H_

src/engine/txn_engine_helper.cc

@@ -32,6 +32,7 @@
 #include "butil/status.h"
 #include "bvar/latency_recorder.h"
 #include "common/constant.h"
+#include "common/gflag_validator.h"
 #include "common/helper.h"
 #include "common/logging.h"
 #include "common/stream.h"
@@ -52,6 +53,7 @@
 #include "rocksdb/sst_file_reader.h"
 #include "server/server.h"
 #include "vector/codec.h"
+
 namespace dingodb {
 
 DEFINE_int64(max_short_value_in_write_cf, 256, "max short value in write cf");
@@ -74,6 +76,10 @@ DEFINE_int64(max_restore_count, 100000, "max restore count");
 DECLARE_int64(stream_message_max_bytes);
 DECLARE_int64(stream_message_max_limit_size);
 
+DEFINE_validator(dingo_log_switch_txn_detail, &PassBool);
+DEFINE_validator(dingo_log_switch_txn_gc_detail, &PassBool);
+DEFINE_validator(dingo_log_switch_backup_detail, &PassBool);
+
 butil::Status TxnReader::Init() {
   if (is_initialized_) {
     return butil::Status::OK();