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ServerUUID - generate random uuid

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This commit is contained in:
bharatnc 2021-02-04 11:34:18 -08:00
parent 5a468a5d32
commit 14d2d68cf7
2 changed files with 27 additions and 9 deletions
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31
src/Common/ServerUUIDFile.cpp
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@ -5,10 +5,9 @@
#include <errno.h>
#include <Poco/File.h>
#include <Poco/UUID.h>
#include <common/logger_useful.h>
#include <common/errnoToString.h>
#include <Common/ClickHouseRevision.h>
#include <common/LocalDateTime.h>
#include <IO/ReadBufferFromFile.h>
#include <IO/LimitReadBuffer.h>
@ -28,10 +27,30 @@ extern const int CANNOT_SEEK_THROUGH_FILE;
}
ServerUUIDFile::FillFunction ServerUUIDFile::write_server_uuid = [](WriteBuffer & out)
{
// TODO: compute random uuid
out << "736833cf-2224-475b-82e2-cbc114407345";
ServerUUIDFile::FillFunction ServerUUIDFile::write_server_uuid = [](WriteBuffer & out) {
union
{
char bytes[16];
struct
{
UInt64 a;
UInt64 b;
} words;
__uint128_t uuid;
} random;
random.words.a = thread_local_rng(); //-V656
random.words.b = thread_local_rng(); //-V656
struct QueryUUID : Poco::UUID
{
QueryUUID(const char * bytes, Poco::UUID::Version version)
: Poco::UUID(bytes, version) {}
};
auto server_uuid = QueryUUID(random.bytes, Poco::UUID::UUID_RANDOM).toString();
out << server_uuid;
};

5
src/Common/ServerUUIDFile.h
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@ -1,13 +1,12 @@
#pragma once
#include <string>
#include <functional>
#include <string>
#include <boost/noncopyable.hpp>
namespace DB
{
class WriteBuffer;
@ -16,7 +15,7 @@ class WriteBuffer;
class ServerUUIDFile : private boost::noncopyable
{
public:
using FillFunction = std::function<void(WriteBuffer&)>;
using FillFunction = std::function<void(WriteBuffer &)>;
ServerUUIDFile(std::string path_, FillFunction fill_);
~ServerUUIDFile();