mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-15 12:14:18 +00:00
566 lines
21 KiB
C++
566 lines
21 KiB
C++
#pragma once
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#include <Poco/Timespan.h>
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#include <Poco/URI.h>
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#include <base/types.h>
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#include <Core/Field.h>
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#include <Core/MultiEnum.h>
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#include <boost/range/adaptor/map.hpp>
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#include <chrono>
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#include <unordered_map>
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#include <string_view>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int BAD_ARGUMENTS;
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}
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class ReadBuffer;
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class WriteBuffer;
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/** One setting for any type.
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* Stores a value within itself, as well as a flag - whether the value was changed.
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* This is done so that you can send to the remote servers only changed settings (or explicitly specified in the config) values.
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* That is, if the configuration was not specified in the config and was not dynamically changed, it is not sent to the remote server,
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* and the remote server will use its default value.
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*/
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template <typename T>
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struct SettingFieldNumber
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{
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using Type = T;
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Type value;
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bool changed = false;
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explicit SettingFieldNumber(Type x = 0) : value(x) {}
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explicit SettingFieldNumber(const Field & f);
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SettingFieldNumber & operator=(Type x) { value = x; changed = true; return *this; }
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SettingFieldNumber & operator=(const Field & f);
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operator Type() const { return value; } /// NOLINT
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explicit operator Field() const { return value; }
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String toString() const;
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void parseFromString(const String & str);
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void writeBinary(WriteBuffer & out) const;
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void readBinary(ReadBuffer & in);
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};
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using SettingFieldUInt64 = SettingFieldNumber<UInt64>;
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using SettingFieldInt64 = SettingFieldNumber<Int64>;
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using SettingFieldUInt32 = SettingFieldNumber<UInt32>;
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using SettingFieldInt32 = SettingFieldNumber<Int32>;
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using SettingFieldFloat = SettingFieldNumber<float>;
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using SettingFieldDouble = SettingFieldNumber<double>;
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using SettingFieldBool = SettingFieldNumber<bool>;
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/** Wraps any SettingField to support special value 'auto' that can be checked with `is_auto` flag.
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* Note about serialization:
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* The new versions with `SettingsWriteFormat::STRINGS_WITH_FLAGS` serialize values as a string.
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* In legacy SettingsWriteFormat mode, functions `read/writeBinary` would serialize values as a binary, and 'is_auto' would be ignored.
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* It's possible to upgrade settings from regular type to wrapped ones and keep compatibility with old versions,
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* but when serializing 'auto' old version will see binary representation of the default value.
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*/
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template <typename Base>
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struct SettingAutoWrapper
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{
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constexpr static auto keyword = "auto";
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static bool isAuto(const Field & f) { return f.getType() == Field::Types::String && f.safeGet<const String &>() == keyword; }
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static bool isAuto(const String & str) { return str == keyword; }
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using Type = typename Base::Type;
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Base base;
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bool is_auto = false;
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bool changed = false;
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explicit SettingAutoWrapper() : is_auto(true) {}
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explicit SettingAutoWrapper(Type val) : is_auto(false) { base = Base(val); }
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explicit SettingAutoWrapper(const Field & f)
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: is_auto(isAuto(f))
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{
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if (!is_auto)
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base = Base(f);
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}
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SettingAutoWrapper & operator=(const Field & f)
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{
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changed = true;
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if (is_auto = isAuto(f); !is_auto)
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base = f;
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return *this;
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}
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explicit operator Field() const { return is_auto ? Field(keyword) : Field(base); }
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String toString() const { return is_auto ? keyword : base.toString(); }
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void parseFromString(const String & str)
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{
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changed = true;
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if (is_auto = isAuto(str); !is_auto)
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base.parseFromString(str);
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}
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void writeBinary(WriteBuffer & out) const
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{
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if (is_auto)
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Base().writeBinary(out); /// serialize default value
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else
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base.writeBinary(out);
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}
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/*
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* That it is fine to reset `is_auto` here and to use default value in case `is_auto`
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* because settings will be serialized only if changed.
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* If they were changed they were requested to use explicit value instead of `auto`.
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* And so interactions between client-server, and server-server (distributed queries), should be OK.
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*/
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void readBinary(ReadBuffer & in) { changed = true; is_auto = false; base.readBinary(in); }
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Type valueOr(Type default_value) const { return is_auto ? default_value : base.value; }
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};
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using SettingFieldUInt64Auto = SettingAutoWrapper<SettingFieldUInt64>;
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using SettingFieldInt64Auto = SettingAutoWrapper<SettingFieldInt64>;
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using SettingFieldFloatAuto = SettingAutoWrapper<SettingFieldFloat>;
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using SettingFieldUInt32Auto = SettingAutoWrapper<SettingFieldUInt32>;
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using SettingFieldInt32Auto = SettingAutoWrapper<SettingFieldInt32>;
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using SettingFieldDoubleAuto = SettingAutoWrapper<SettingFieldDouble>;
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/* Similar to SettingFieldUInt64Auto with small differences to behave like regular UInt64, supported to compatibility.
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* When setting to 'auto' it becomes equal to the number of processor cores without taking into account SMT.
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* A value of 0 is also treated as 'auto', so 'auto' is parsed and serialized in the same way as 0.
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*/
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struct SettingFieldMaxThreads
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{
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bool is_auto;
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UInt64 value;
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bool changed = false;
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explicit SettingFieldMaxThreads(UInt64 x = 0) : is_auto(!x), value(is_auto ? getAuto() : x) {}
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explicit SettingFieldMaxThreads(const Field & f);
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SettingFieldMaxThreads & operator=(UInt64 x) { is_auto = !x; value = is_auto ? getAuto() : x; changed = true; return *this; }
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SettingFieldMaxThreads & operator=(const Field & f);
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operator UInt64() const { return value; } /// NOLINT
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explicit operator Field() const { return value; }
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/// Writes "auto(<number>)" instead of simple "<number>" if `is_auto==true`.
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String toString() const;
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void parseFromString(const String & str);
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void writeBinary(WriteBuffer & out) const;
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void readBinary(ReadBuffer & in);
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private:
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static UInt64 getAuto();
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};
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enum class SettingFieldTimespanUnit { Millisecond, Second };
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template <SettingFieldTimespanUnit unit_>
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struct SettingFieldTimespan
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{
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using Unit = SettingFieldTimespanUnit;
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static constexpr Unit unit = unit_;
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static constexpr UInt64 microseconds_per_unit = (unit == SettingFieldTimespanUnit::Millisecond) ? 1000 : 1000000;
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Poco::Timespan value;
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bool changed = false;
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explicit SettingFieldTimespan(Poco::Timespan x = {}) : value(x) {}
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template <class Rep, class Period = std::ratio<1>>
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explicit SettingFieldTimespan(const std::chrono::duration<Rep, Period> & x)
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: SettingFieldTimespan(Poco::Timespan{static_cast<Poco::Timespan::TimeDiff>(std::chrono::duration_cast<std::chrono::microseconds>(x).count())}) {}
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explicit SettingFieldTimespan(UInt64 x) : SettingFieldTimespan(Poco::Timespan{static_cast<Poco::Timespan::TimeDiff>(x * microseconds_per_unit)}) {}
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explicit SettingFieldTimespan(const Field & f);
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SettingFieldTimespan & operator =(Poco::Timespan x) { value = x; changed = true; return *this; }
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template <class Rep, class Period = std::ratio<1>>
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SettingFieldTimespan & operator =(const std::chrono::duration<Rep, Period> & x) { *this = Poco::Timespan{static_cast<Poco::Timespan::TimeDiff>(std::chrono::duration_cast<std::chrono::microseconds>(x).count())}; return *this; }
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SettingFieldTimespan & operator =(UInt64 x) { *this = Poco::Timespan{static_cast<Poco::Timespan::TimeDiff>(x * microseconds_per_unit)}; return *this; }
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SettingFieldTimespan & operator =(const Field & f);
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operator Poco::Timespan() const { return value; } /// NOLINT
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template <class Rep, class Period = std::ratio<1>>
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operator std::chrono::duration<Rep, Period>() const { return std::chrono::duration_cast<std::chrono::duration<Rep, Period>>(std::chrono::microseconds(value.totalMicroseconds())); } /// NOLINT
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explicit operator UInt64() const { return value.totalMicroseconds() / microseconds_per_unit; }
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explicit operator Field() const;
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Poco::Timespan::TimeDiff totalMicroseconds() const { return value.totalMicroseconds(); }
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Poco::Timespan::TimeDiff totalMilliseconds() const { return value.totalMilliseconds(); }
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Poco::Timespan::TimeDiff totalSeconds() const { return value.totalSeconds(); }
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String toString() const;
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void parseFromString(const String & str);
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void writeBinary(WriteBuffer & out) const;
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void readBinary(ReadBuffer & in);
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};
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using SettingFieldSeconds = SettingFieldTimespan<SettingFieldTimespanUnit::Second>;
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using SettingFieldMilliseconds = SettingFieldTimespan<SettingFieldTimespanUnit::Millisecond>;
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struct SettingFieldString
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{
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String value;
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bool changed = false;
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explicit SettingFieldString(std::string_view str = {}) : value(str) {}
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explicit SettingFieldString(const String & str) : SettingFieldString(std::string_view{str}) {}
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explicit SettingFieldString(String && str) : value(std::move(str)) {}
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explicit SettingFieldString(const char * str) : SettingFieldString(std::string_view{str}) {}
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explicit SettingFieldString(const Field & f) : SettingFieldString(f.safeGet<const String &>()) {}
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SettingFieldString & operator =(std::string_view str) { value = str; changed = true; return *this; }
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SettingFieldString & operator =(const String & str) { *this = std::string_view{str}; return *this; }
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SettingFieldString & operator =(String && str) { value = std::move(str); changed = true; return *this; }
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SettingFieldString & operator =(const char * str) { *this = std::string_view{str}; return *this; }
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SettingFieldString & operator =(const Field & f) { *this = f.safeGet<const String &>(); return *this; }
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operator const String &() const { return value; } /// NOLINT
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explicit operator Field() const { return value; }
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const String & toString() const { return value; }
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void parseFromString(const String & str) { *this = str; }
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void writeBinary(WriteBuffer & out) const;
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void readBinary(ReadBuffer & in);
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};
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struct SettingFieldMap
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{
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public:
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Map value;
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bool changed = false;
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explicit SettingFieldMap(const Map & map = {}) : value(map) {}
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explicit SettingFieldMap(Map && map) : value(std::move(map)) {}
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explicit SettingFieldMap(const Field & f);
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SettingFieldMap & operator =(const Map & map) { value = map; changed = true; return *this; }
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SettingFieldMap & operator =(const Field & f);
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operator const Map &() const { return value; } /// NOLINT
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explicit operator Field() const { return value; }
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String toString() const;
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void parseFromString(const String & str);
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void writeBinary(WriteBuffer & out) const;
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void readBinary(ReadBuffer & in);
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};
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struct SettingFieldChar
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{
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public:
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char value;
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bool changed = false;
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explicit SettingFieldChar(char c = '\0') : value(c) {}
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explicit SettingFieldChar(const Field & f);
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SettingFieldChar & operator =(char c) { value = c; changed = true; return *this; }
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SettingFieldChar & operator =(const Field & f);
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operator char() const { return value; } /// NOLINT
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explicit operator Field() const { return toString(); }
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String toString() const { return String(&value, 1); }
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void parseFromString(const String & str);
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void writeBinary(WriteBuffer & out) const;
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void readBinary(ReadBuffer & in);
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};
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struct SettingFieldURI
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{
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Poco::URI value;
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bool changed = false;
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explicit SettingFieldURI(const Poco::URI & uri = {}) : value(uri) {}
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explicit SettingFieldURI(const String & str) : SettingFieldURI(Poco::URI{str}) {}
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explicit SettingFieldURI(const char * str) : SettingFieldURI(Poco::URI{str}) {}
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explicit SettingFieldURI(const Field & f) : SettingFieldURI(f.safeGet<String>()) {}
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SettingFieldURI & operator =(const Poco::URI & x) { value = x; changed = true; return *this; }
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SettingFieldURI & operator =(const String & str) { *this = Poco::URI{str}; return *this; }
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SettingFieldURI & operator =(const char * str) { *this = Poco::URI{str}; return *this; }
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SettingFieldURI & operator =(const Field & f) { *this = f.safeGet<const String &>(); return *this; }
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operator const Poco::URI &() const { return value; } /// NOLINT
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explicit operator String() const { return toString(); }
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explicit operator Field() const { return toString(); }
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String toString() const { return value.toString(); }
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void parseFromString(const String & str) { *this = str; }
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void writeBinary(WriteBuffer & out) const;
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void readBinary(ReadBuffer & in);
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};
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/** Template class to define enum-based settings.
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* Example of usage:
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*
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* mysettings.h:
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* enum Gender { Male, Female };
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* DECLARE_SETTING_ENUM(SettingFieldGender, Gender)
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*
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* mysettings.cpp:
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* IMPLEMENT_SETTING_ENUM(SettingFieldGender, ErrorCodes::BAD_ARGUMENTS,
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* {{"Male", Gender::Male}, {"Female", Gender::Female}})
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*/
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template <typename EnumT, typename Traits>
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struct SettingFieldEnum
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{
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using EnumType = EnumT;
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EnumType value;
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bool changed = false;
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explicit SettingFieldEnum(EnumType x = EnumType{0}) : value(x) {}
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explicit SettingFieldEnum(const Field & f) : SettingFieldEnum(Traits::fromString(f.safeGet<const String &>())) {}
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SettingFieldEnum & operator =(EnumType x) { value = x; changed = true; return *this; }
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SettingFieldEnum & operator =(const Field & f) { *this = Traits::fromString(f.safeGet<const String &>()); return *this; }
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operator EnumType() const { return value; } /// NOLINT
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explicit operator Field() const { return toString(); }
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String toString() const { return Traits::toString(value); }
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void parseFromString(const String & str) { *this = Traits::fromString(str); }
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void writeBinary(WriteBuffer & out) const;
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void readBinary(ReadBuffer & in);
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};
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struct SettingFieldEnumHelpers
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{
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static void writeBinary(std::string_view str, WriteBuffer & out);
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static String readBinary(ReadBuffer & in);
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};
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template <typename EnumT, typename Traits>
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void SettingFieldEnum<EnumT, Traits>::writeBinary(WriteBuffer & out) const
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{
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SettingFieldEnumHelpers::writeBinary(toString(), out);
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}
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template <typename EnumT, typename Traits>
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void SettingFieldEnum<EnumT, Traits>::readBinary(ReadBuffer & in)
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{
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*this = Traits::fromString(SettingFieldEnumHelpers::readBinary(in));
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}
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/// NOLINTNEXTLINE
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#define DECLARE_SETTING_ENUM(ENUM_TYPE) \
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DECLARE_SETTING_ENUM_WITH_RENAME(ENUM_TYPE, ENUM_TYPE)
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/// NOLINTNEXTLINE
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#define IMPLEMENT_SETTING_ENUM(ENUM_TYPE, ERROR_CODE_FOR_UNEXPECTED_NAME, ...) \
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IMPLEMENT_SETTING_ENUM_WITH_RENAME(ENUM_TYPE, ERROR_CODE_FOR_UNEXPECTED_NAME, __VA_ARGS__)
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/// NOLINTNEXTLINE
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#define DECLARE_SETTING_ENUM_WITH_RENAME(NEW_NAME, ENUM_TYPE) \
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struct SettingField##NEW_NAME##Traits \
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{ \
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using EnumType = ENUM_TYPE; \
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static const String & toString(EnumType value); \
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static EnumType fromString(std::string_view str); \
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}; \
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\
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using SettingField##NEW_NAME = SettingFieldEnum<ENUM_TYPE, SettingField##NEW_NAME##Traits>;
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/// NOLINTNEXTLINE
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#define IMPLEMENT_SETTING_ENUM_WITH_RENAME(NEW_NAME, ERROR_CODE_FOR_UNEXPECTED_NAME, ...) \
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const String & SettingField##NEW_NAME##Traits::toString(typename SettingField##NEW_NAME::EnumType value) \
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{ \
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static const std::unordered_map<EnumType, String> map = [] { \
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std::unordered_map<EnumType, String> res; \
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constexpr std::pair<const char *, EnumType> pairs[] = __VA_ARGS__; \
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for (const auto & [name, val] : pairs) \
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res.emplace(val, name); \
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return res; \
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}(); \
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auto it = map.find(value); \
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if (it != map.end()) \
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return it->second; \
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throw Exception::createDeprecated( \
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"Unexpected value of " #NEW_NAME ":" + std::to_string(std::underlying_type<EnumType>::type(value)), \
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ERROR_CODE_FOR_UNEXPECTED_NAME); \
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} \
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\
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typename SettingField##NEW_NAME::EnumType SettingField##NEW_NAME##Traits::fromString(std::string_view str) \
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{ \
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static const std::unordered_map<std::string_view, EnumType> map = [] { \
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std::unordered_map<std::string_view, EnumType> res; \
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constexpr std::pair<const char *, EnumType> pairs[] = __VA_ARGS__; \
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for (const auto & [name, val] : pairs) \
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res.emplace(name, val); \
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return res; \
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}(); \
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auto it = map.find(str); \
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if (it != map.end()) \
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return it->second; \
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String msg = "Unexpected value of " #NEW_NAME ": '" + String{str} + "'. Must be one of ["; \
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bool need_comma = false; \
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for (auto & name : map | boost::adaptors::map_keys) \
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{ \
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if (std::exchange(need_comma, true)) \
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msg += ", "; \
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msg += "'" + String{name} + "'"; \
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} \
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msg += "]"; \
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throw Exception::createDeprecated(msg, ERROR_CODE_FOR_UNEXPECTED_NAME); \
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}
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// Mostly like SettingFieldEnum, but can have multiple enum values (or none) set at once.
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template <typename Enum, typename Traits>
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struct SettingFieldMultiEnum
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{
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using EnumType = Enum;
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using ValueType = MultiEnum<Enum>;
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using StorageType = typename ValueType::StorageType;
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ValueType value;
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bool changed = false;
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explicit SettingFieldMultiEnum(ValueType v = ValueType{}) : value{v} {}
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explicit SettingFieldMultiEnum(EnumType e) : value{e} {}
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explicit SettingFieldMultiEnum(StorageType s) : value(s) {}
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explicit SettingFieldMultiEnum(const Field & f) : value(parseValueFromString(f.safeGet<const String &>())) {}
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operator ValueType() const { return value; } /// NOLINT
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explicit operator StorageType() const { return value.getValue(); }
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explicit operator Field() const { return toString(); }
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SettingFieldMultiEnum & operator= (StorageType x) { changed = x != value.getValue(); value.setValue(x); return *this; }
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SettingFieldMultiEnum & operator= (ValueType x) { changed = !(x == value); value = x; return *this; }
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SettingFieldMultiEnum & operator= (const Field & x) { parseFromString(x.safeGet<const String &>()); return *this; }
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String toString() const
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{
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static const String separator = ",";
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String result;
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for (StorageType i = 0; i < Traits::getEnumSize(); ++i)
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{
|
|
const auto v = static_cast<Enum>(i);
|
|
if (value.isSet(v))
|
|
{
|
|
result += Traits::toString(v);
|
|
result += separator;
|
|
}
|
|
}
|
|
|
|
if (!result.empty())
|
|
result.erase(result.size() - separator.size());
|
|
|
|
return result;
|
|
}
|
|
void parseFromString(const String & str) { *this = parseValueFromString(str); }
|
|
|
|
void writeBinary(WriteBuffer & out) const;
|
|
void readBinary(ReadBuffer & in);
|
|
|
|
private:
|
|
static ValueType parseValueFromString(const std::string_view str)
|
|
{
|
|
static const String separators=", ";
|
|
|
|
ValueType result;
|
|
|
|
//to avoid allocating memory on substr()
|
|
const std::string_view str_view{str};
|
|
|
|
auto value_start = str_view.find_first_not_of(separators);
|
|
while (value_start != std::string::npos)
|
|
{
|
|
auto value_end = str_view.find_first_of(separators, value_start + 1);
|
|
if (value_end == std::string::npos)
|
|
value_end = str_view.size();
|
|
|
|
result.set(Traits::fromString(str_view.substr(value_start, value_end - value_start)));
|
|
value_start = str_view.find_first_not_of(separators, value_end);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
};
|
|
|
|
template <typename EnumT, typename Traits>
|
|
void SettingFieldMultiEnum<EnumT, Traits>::writeBinary(WriteBuffer & out) const
|
|
{
|
|
SettingFieldEnumHelpers::writeBinary(toString(), out);
|
|
}
|
|
|
|
template <typename EnumT, typename Traits>
|
|
void SettingFieldMultiEnum<EnumT, Traits>::readBinary(ReadBuffer & in)
|
|
{
|
|
parseFromString(SettingFieldEnumHelpers::readBinary(in));
|
|
}
|
|
|
|
/// NOLINTNEXTLINE
|
|
#define DECLARE_SETTING_MULTI_ENUM(ENUM_TYPE) \
|
|
DECLARE_SETTING_MULTI_ENUM_WITH_RENAME(ENUM_TYPE, ENUM_TYPE)
|
|
|
|
/// NOLINTNEXTLINE
|
|
#define DECLARE_SETTING_MULTI_ENUM_WITH_RENAME(ENUM_TYPE, NEW_NAME) \
|
|
struct SettingField##NEW_NAME##Traits \
|
|
{ \
|
|
using EnumType = ENUM_TYPE; \
|
|
static size_t getEnumSize(); \
|
|
static const String & toString(EnumType value); \
|
|
static EnumType fromString(std::string_view str); \
|
|
}; \
|
|
\
|
|
using SettingField##NEW_NAME = SettingFieldMultiEnum<ENUM_TYPE, SettingField##NEW_NAME##Traits>;
|
|
|
|
/// NOLINTNEXTLINE
|
|
#define IMPLEMENT_SETTING_MULTI_ENUM(ENUM_TYPE, ERROR_CODE_FOR_UNEXPECTED_NAME, ...) \
|
|
IMPLEMENT_SETTING_MULTI_ENUM_WITH_RENAME(ENUM_TYPE, ERROR_CODE_FOR_UNEXPECTED_NAME, __VA_ARGS__)
|
|
|
|
/// NOLINTNEXTLINE
|
|
#define IMPLEMENT_SETTING_MULTI_ENUM_WITH_RENAME(NEW_NAME, ERROR_CODE_FOR_UNEXPECTED_NAME, ...) \
|
|
IMPLEMENT_SETTING_ENUM_WITH_RENAME(NEW_NAME, ERROR_CODE_FOR_UNEXPECTED_NAME, __VA_ARGS__)\
|
|
size_t SettingField##NEW_NAME##Traits::getEnumSize() {\
|
|
return std::initializer_list<std::pair<const char*, NEW_NAME>> __VA_ARGS__ .size();\
|
|
}
|
|
|
|
/// Can keep a value of any type. Used for user-defined settings.
|
|
struct SettingFieldCustom
|
|
{
|
|
Field value;
|
|
bool changed = false;
|
|
|
|
explicit SettingFieldCustom(const Field & f = {}) : value(f) {}
|
|
SettingFieldCustom & operator =(const Field & f) { value = f; changed = true; return *this; }
|
|
explicit operator Field() const { return value; }
|
|
|
|
String toString() const;
|
|
void parseFromString(const String & str);
|
|
|
|
void writeBinary(WriteBuffer & out) const;
|
|
void readBinary(ReadBuffer & in);
|
|
};
|
|
|
|
}
|