CQRS / Event Sourcing im Content Repository

Oliver Hader vom TYPO3 Kernteam und ich erklären gemeinsam die Konzepte und Vor- und Nachteile von Event Sourcing und CQRS, am Beispiel von Neos und TYPO3 CMS. Gehalten auf dem TYPO3Camp Mitteldeutschland.

Vortrag als Video: https://www.youtube.com/watch?v=lefgKJSWqx0&t=4968
Ollys Masterarbeit: https://www.slideshare.net/ohader/typo3-cms-datenmodifikation-event-sourcing-masterarbeit

Transcript

1. CQRS / Event Sourcing im Content Repository TYPO3Camp Mitteldeutschland 25./26.01.2019
2. Sebastian Olly
3. Who has an idea what CQRS/ES is? *you?
4. Basic Idea 
 (Event Sourcing & CQRS)
6. Big Picture Before NodeInterface API Doctrine ORM NodeData Repository DB
7. Big Picture Before Commands State Queries
8. write side read side Event store (DB Table) Projection 1 (e.g. various DB tables) Commands Events Projection 2 (soft) constraints
9. write side read side Event store (DB Table) Content Graph Commands Events Workspace Dirtyness (soft) constraints …
11. immediately consistent strongly consistent not consistent eventually consistent
12. TYPO3 Data Architecture Repository & Reconstitution Routing Controller View Model Permission Persistence Infrastructure Frontend Extbase Backend EditDocumentController FormEngine <<TCA>> FormDataProvider BackendUserAuthentication DataHandler RelationHandler TypoScriptFrontendController ActionContoller AbstractView AbstractEntity & AbstractValueObject Repository Typo3DbBackend Backend PersistenceManager DataMapper StandaloneView <<custom>> ConnectionPool Connection <<TCA>> AbstractPlugin ContentObjectRenderer Frontend\RequestHandler Backend\RouteDispatcher Backend\RequestHandler MVC\Dispatcher <<TypoScript>> <<direct database operations>> <<direct database operations>> x x x
13. Localization in TYPO3 DataHandlerController DataHandler RelationHandler DatabaseConnection translate <<create>> localize() copyRecord() <<create>> DataHandler process_datamap() last_insert_id() fetch record record [x]-processDBdata() <<create>> start() fetch references references writeForeignField() update references insert record new_record_id new_record_id new_record_id references new_record_id multiple read & write processes
14. Context & Overlays is translation of uid 13 sys_language_uid 0 :tt_content l10n_parent 0 header Message pid 100 t3ver_wsid 0 t3ver_state 0 t3ver_oid 0 uid 27 sys_language_uid 1 :tt_content l10n_parent 13 header Nachricht pid 100 t3ver_wsid 1 t3ver_state 1 t3ver_oid 0 uid 28 sys_language_uid 1 :tt_content l10n_parent 13 header Nachricht pid -1 t3ver_wsid 1 t3ver_state -1 t3ver_oid 27 uid 41 sys_language_uid 0 :tt_content l10n_parent 0 header News pid -1 t3ver_wsid 1 t3ver_state 0 t3ver_oid 13 is workspace version of is new version is default version is workspace version of is new palceholder
15. Olly's Master Thesis https://www.slideshare.net/ohader/ typo3-cms-datenmodifikation-event- sourcing-masterarbeit
16. COMMAND Update node properties properties: text: oldValue: "Down the Rabbit-" newValue: "Down the Rabbit-Hole" nodeAggregateIdentifier: uuid dimensionSpacePoint: ... contentStreamIdentifier: uuid Down the Rabbit-Hole Editing With Events
17. EVENT STORE EVENT Node properties were updated properties: text: oldValue: "Down the Rabbit-" newValue: "Down the Rabbit-Hole" nodeAggregateIdentifier: uuid dimensionSpacePoint: ... contentStreamIdentifier: uuid COMMAND HANDLER e1 Editing With Events COMMAND Update node properties properties: text: oldValue: "Down the Rabbit-" newValue: "Down the Rabbit-Hole" nodeAggregateIdentifier: uuid dimensionSpacePoint: ... contentStreamIdentifier: uuid
18. e1 EVENT STORE e1 Node properties were updated e2 NodeAggregateWithNode was created e3 Node properties were updated e4 Create Workspace Editing With Events
19. Workspaces 
 aka Content Streams
20. Workspaces e1 Live Workspace A e2 e3 merging works
21. Workspaces e1 Live Workspace A e2 e3 merge conflict e4
22. Workspaces e1 Live Workspace A e2 e3 merge successful e4 e2’ e3’
23. Content Stream 1 user-sebastian Content Stream 2
24. changes to live workspace 
 are not immediately visible!
25. immediately consistent strongly consistent not consistent eventually consistent
26. versioning editing notifications better read performance undo/redo intelligent write conflict resolution synchronization of content across instances our feature wishes
27. Events
28. Donnerstag, 14. März, 14:00-18:00 kostenfrei
29. neoscon.io 10% Rabattcode: Neos-Kickstart 10.-11.05.2019
30. Summary
31. www.neos.io