ydb/library/cpp/yt/error/error_attribute.h, branch meta-1.0.3-dev4

YT-21233: Drop dependency on yson in library/cpp/yt/error by switch to std::string everywhere

2024-12-26T08:12:17Z

done commit_hash:8a83afa39917ba66a5161388a7cd74a4488d9908

YT-21233: Adjust (To/From)ErrorAttributeValue CPOs, revert ConvertTo becoming CPO, move TErrorCode and TError to library/cpp/yt/error

2024-12-25T04:31:55Z

\[nodiff:caesar\] List of changes: 1) Make `ConvertTo` a normal function again (basically, a revert of previous change). It turned out to be very inconvenient entry point 2) Introduce concept for "Primitive types" which are handled without yt/core module. Please note that inclusion of core **does not** affect work with primitive types (otherwise we would be facing and ODR violation). These are numerics, duration, instant, string-like objects and guid 3) Introduce `FromErrorAttributeValue` which is a substitute to `ConvertTo` with special behavior (see below) 4) Scheme for (de-)serialization has changed: 1) Primitive types are handled via `ConvertToTextYsonString` and `ConvertFromTextYsonString` 2) Other types are not supported without yt/core. Otherwise `ConvertToYsonString(value, EYsonFormat::Text)` used for serialization and `ConvertTo(value)` for deserialization. 5) New format of attribute value storage allows to not care about concrete type of the attribute (text yson strings can be detected since they start with `\"` and deserialized so are text yson bools, everything else is already human readable). This drops dependency on `TTokenizer` 6) Some small parts (e.g. enums or constants or aliases) of yt/core/misc files were moved to library/cpp/yt/\* locations and re-included to drop dependencies of stripped\_error on them 7) `TErrorAttributes` is now a simple hash map instead of a handle to `IAttributeDictionary` 8) `ExtractFromAttributes` weak symbol is finally moved to library/cpp/yt/error due to point 9 allowing to fully drop dependency on `IAttributeDictionary`. Combined with point 7 this drops dep on yt/core/ytree altogether 9) Moved `TErrorCode` to library/cpp/yt/error. There is a logger there which forces dep on library/cpp/yt/logging. It is not required really, and can be later removed 10) Moved `TError` with format and macroes to library/cpp/yt/error. It still (and probably forever will) depend on yson. What can be done next: Switch TYsonString to TString and move ConvertTo/FromTextYsonString to library/cpp/yt/error. This would remove dep on library/cpp/yt/yson\_string commit_hash:6f11dc478ab782a1f98a5aedcd45a4800d3f4e7b

YT-21233: Introduce ToAttributeValue cpo which removes dependency of TErrorAttribute from yt/core

2024-11-29T19:12:26Z

Plan: 1) Remove `IAttributedDictionary` type from the public API. \+ 2) Remove `Set` method from public API in favor of `operator<<=`. \+ 3) Adopt `ConvertTo` (or other name) CPO with proper extension into `NYT::NYson::ConvertTo` from `yt/core`. 4) Use CPO from (3) to eliminate direct dependency on `yt/core` of `Get/Find` methods from attributes API. 5) Adopt `ConvertToYsonString` (or other name) CPO with proper extension into `yt/core` customisations. 6) Use CPO from (5) to eliminate direct dependency on `yt/core` of `TErrorAttribute` ctor. 7) Swap attributes implementation to the one which doesn’t use `IAttributeDictionary`. 8) At this point `stripped_error*` can be moved to library/cpp/yt and so can recursively dependant on THROW macro methods `Get/Find/…`. 9) Adjust CPO’s to work with `std::string` instead of `TYsonString` assuming text format to be used (maybe `TString` for now). 10) Remove dep of `library/cpp/yt/error` on `yson` entirely. This pr addresses 5-6 steps of plan. Below is a brief explanation of design decisions. We also expressed everything related to key-value code in terms of aliases of `TErrorAttribute` so that later we could make a relatively simple switch to `std::string`. We expect to do steps 7-8 in the next pull request as everything should be ready commit_hash:de9feca2bd24d823b33d904ef0fa5f4856f9b020