add ob configserver (#943)

tools/ob-configserver/lib/trace/header.go

@@ -0,0 +1,39 @@
+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+package trace
+
+import (
+	"context"
+	"crypto/rand"
+	"fmt"
+
+	"github.com/oceanbase/configserver/logger"
+)
+
+func RandomTraceId() string {
+	n := 8
+	b := make([]byte, n)
+	_, err := rand.Read(b)
+	if err != nil {
+		return ""
+	}
+	return fmt.Sprintf("%x", b)
+}
+
+func ContextWithRandomTraceId() context.Context {
+	return context.WithValue(context.Background(), logger.TraceIdKey{}, RandomTraceId())
+}
+
+func ContextWithTraceId(traceId string) context.Context {
+	return context.WithValue(context.Background(), logger.TraceIdKey{}, traceId)
+}