Unique ID: UUID (vesoft-inc#3453)

* uuid

* uuid

src/common/id/CMakeLists.txt

@@ -8,4 +8,9 @@ nebula_add_library(
     Snowflake.cpp
 )
 
+nebula_add_library(
+    uuid_obj OBJECT
+    UUID.cpp
+)
+
 nebula_add_subdirectory(test)

src/common/id/UUID.cpp

@@ -0,0 +1,20 @@
+/* Copyright (c) 2021 vesoft inc. All rights reserved.
+ *
+ * This source code is licensed under Apache 2.0 License.
+ */
+
+#include "common/id/UUID.h"
+
+namespace nebula {
+
+boost::uuids::uuid UUIDV4::getId() {
+  boost::uuids::uuid uuid = boost::uuids::random_generator()();
+  return uuid;
+}
+
+std::string UUIDV4::getIdStr() {
+  boost::uuids::uuid uuid = getId();
+  return boost::uuids::to_string(uuid);
+}
+
+}  // namespace nebula

src/common/id/UUID.h

@@ -0,0 +1,28 @@
+/* Copyright (c) 2021 vesoft inc. All rights reserved.
+ *
+ * This source code is licensed under Apache 2.0 License.
+ */
+
+#include <boost/uuid/uuid.hpp>
+#include <boost/uuid/uuid_generators.hpp>
+#include <boost/uuid/uuid_io.hpp>
+
+/*
+ * UUID v1: time-based and mac-based
+ * UUID v2: DCE security
+ * UUID v3: name-based MD5
+ * UUID v4: random
+ * UUID v5: name-based SHA-1
+ * boost implements uuid v4 and v5(is deprecated due to security concerns)
+ */
+namespace nebula {
+
+// the probability to find a duplicate within version-4 UUIDs is one in a billion.
+// the computed is in: https://en.wikipedia.org/wiki/Universally_unique_identifier
+class UUIDV4 {
+ public:
+  static boost::uuids::uuid getId();
+
+  static std::string getIdStr();
+};
+}  // namespace nebula