modules/catalog/tech-notes/acceptUpdateFlow.puml

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@startuml
title Accepting an update

autonumber

actor User

activate User
User -> CatalogManager ++ : Create table (CreateTableCommand)
CatalogManager -> CatalogManager : Acquire latest catalog version
CatalogManager -> CatalogManager : Calculates incremental updates by applying provided command
CatalogManager -> UpdateLog -- : Saves diffs to update log under latestVersion+1
UpdateLog --> CatalogManager ++
CatalogManager -> CatalogManager --++ : Wait catalog of new version to appear in local cache

alt updates were saved

  CatalogManager -> CatalogManager --++ : Wait for delay duration
  CatalogManager -> User -- : Success (Completes the future successfully)

else updates were not saved because of concurrent update

  alt retry limit is not exceeded

    CatalogManager -> CatalogManager : Restart from p.2

  else retry limit is exceeded

    CatalogManager -> User -- : Failure (Completes future exceptionally)

  end

end

deactivate User
@enduml