PS-10246 feature: Implement fixing next_event_position fields / checksums in the event common_header / footer in case of reconnecting to another node (part 3)#98
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percona-ysorokin merged 1 commit intomainfrom Mar 4, 2026
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…sums in the event common_header / footer in case of reconnecting to another node (part 3) https://perconadev.atlassian.net/browse/PS-10246 Added ability to construct binlog events manually from components (common header, post-header, and body). The footer (with the calculated checksum) is added upon request. As a side effect the same event creation function 'binsrv::events::event::create_event()' can also create an encoded version of this event. In order to achieve this, individual event components can now also be constructed from the individual values of their fields: - 'common_header' - 'footer' - generic_post_header_impl<code_type::rotate> - generic_body_impl<code_type::rotate> - generic_post_header_impl<code_type::format_description> - generic_body_impl<code_type::format_description> - generic_post_header_impl<code_type::previous_gtids_log> - generic_body_impl<code_type::previous_gtids_log> In addition, added 'calculate_encoded_size()' / 'encode_to()' methods along with equality comparison operators for each of those classes / template specializations. Added 'binsrv::events::events_storage' typedef based on the 'boost::container::small_vector' as a recommended buffer type for event encoding. 'reader_context::get_hardcoded_post_header_lengths()' method made public in order to be able to construct FORMAT_DESCRIPTION event post headers. 'binsrv::ctime_timestamp' class can now generate readable timestamp in 2 formats: - Extended ISO via 'iso_extended_str()', 'e.g 2026-01-01T20:30:00'. - Simple via 'simple_str()', e.g '2026-Jan-01 20:30:00'. Added 'now()' method to return current timestamp. Added 'util::to_underlying()' helper function (similar to c++23 'std::to_underlying()') that helps with enum to underlying integral conversions. Added 'util::from_underlying()' helper function that helps with underlying integral to enum conversions. Added 'util::to_unsigned()' / 'util::to_signed()' helper functions which help with conversion integral values to its unsigned / signed counterparts of the same size. Fixed problem with not being able to use '|' / '&' / '^' binary operators for 'util::flag_set'. Added new test 'event_test' unit test (BOOST_TEST_MODULE EventTests) that checks roundtrip encoding / parsing functionality for ROTATE, FORMAT_DESCRIPTION, and PREVIOUS_GTIDS_LOG events.
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https://perconadev.atlassian.net/browse/PS-10246
Added ability to construct binlog events manually from components (common header, post-header, and body). The footer (with the calculated checksum) is added upon request. As a side effect the same event creation function 'binsrv::events::event::create_event()' can also create an encoded version of this event.
In order to achieve this, individual event components can now also be constructed from the individual values of their fields:
In addition, added 'calculate_encoded_size()' / 'encode_to()' methods along with equality comparison operators for each of those classes / template specializations.
Added 'binsrv::events::events_storage' typedef based on the 'boost::container::small_vector' as a recommended buffer type for event encoding.
'reader_context::get_hardcoded_post_header_lengths()' method made public in order to be able to construct FORMAT_DESCRIPTION event post headers.
'binsrv::ctime_timestamp' class can now generate readable timestamp in 2 formats:
Added 'util::to_underlying()' helper function (similar to c++23 'std::to_underlying()') that helps with enum to underlying integral conversions. Added 'util::from_underlying()' helper function that helps with underlying integral to enum conversions.
Added 'util::to_unsigned()' / 'util::to_signed()' helper functions which help with conversion integral values to its unsigned / signed counterparts of the same size.
Fixed problem with not being able to use '|' / '&' / '^' binary operators for 'util::flag_set'.
Added new test 'event_test' unit test (BOOST_TEST_MODULE EventTests) that checks roundtrip encoding / parsing functionality for ROTATE, FORMAT_DESCRIPTION, and PREVIOUS_GTIDS_LOG events.