The-Inevitable-Event-Centric-Book

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RFC: Invariants across multiple streams / consistency across multiple streams

10

> Is there any resources you recommend to read for dealing with invariants that involve multiple streams? Thoughts:- - Do everything you possibly can to avoid needing so to do.

MerrionComputing

Problem: Define Miminum Metadata of Messages

10

https://twitter.com/SKleanthous/status/1197272391304523776 https://github.com/cloudevents/spec/blob/master/spec.md See also #29 #33

ylorph

Problem: Handling Concurrency

4

- @MerrionComputing concurrency 🐊 - pessimistic: - checkout / checkin - optimistic locks - no concurrency - stream design - merge - deduplicate - Actor Model

ylorph

Problem: Define consistent/consistency

3

There seem to be different usages of the word "consistent" (e.g. in "eventually consistent") but it might be helpful to define and differentiate the usages?

MerrionComputing

Problem: Dealing With the Outside World (we need to get something done in the outisde world)

4

As in ... some call needs to be done to say a payment gateway Options: - Requested Patterns (@edblackburn or @MerrionComputing term, I like it )

ylorph

Problem: Define the word Projection

4

ylorph

A lot of business domains have processes that happen according to a calendar (or schedule). (For example where interest is accrued on a loan on say 6-monthly basis) For these...

MerrionComputing

Problem: Define the word Command

4

ylorph

Problem: Do We Need DDD Strategic Patterns When Doing EventSourcing ?

3

ylorph

Problem: Take Cover : What is a Saga

2

ylorph