ylorph

Problem: Do We Need DDD Tactical Patterns when Doing EventSourcing ?

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Short answer : no > It is possible to do Aggregates without doing Event Sourcing and to do Event Sourcing without doing Aggregates - and it may be that the...

Problem: Dealing With the Outside World (the outside world is using our information)

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* notification events + Read models hosted by the source service * The Lady Campanula Tottington diagram * notfications event + document * an atom change feed * each entry...

Exercise: A Unique Random Access Code

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You must assign a unique access code in a (pseudo) random fashion. The range of access code at your disposal is [1 000 000, 1 999 999] The access code...

Problem: Patterns for something something must be unique

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Not talking about the Identity of an entity. but some other combination of properties . Let's say , user provided email __*must* be unique within the system__. But __*may* not...

Problem: how to write this book

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The vision is to use this as a reference for concepts when talking about system using some kind of Event [Driven | Sourcing | ...] design None have seen it...

Problem: Patterns for Command Processing & Responses

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- Do commands have responses ? - What do do with errors ? - Are they Request/Response ? - Are they Fire & Forget ? - What about client issuing...