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Event Sourcing
Greg Young
Event Sourcing Greg Young Event Sourcing says all state is - - PowerPoint PPT Presentation
Event Sourcing Greg Young Event Sourcing says all state is - - PowerPoint PPT Presentation
Event Sourcing Greg Young Event Sourcing says all state is transient and you only store facts. Line Items (n) Purchase Order Shipping Information Shipping Cart 3 Items Informati Created Added on Added Shipping Cart 3 Items 1Item
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Event Sourcing says all state is transient and you
- nly store facts.
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Purchase Order Line Items (n) Shipping Information
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Cart Created 3 Items Added Shipping Informati
- n Added
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Cart Created 3 Items Added 1Item Removed Shipping Informati
- n Added
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6 5 4 3 2 1 7
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5 snap 4 3 2 1 6
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I can’t query a series
- f events
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Focus on strategic design first.
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Focus on strategic design first.
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There is no “Best” storage
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Focus on strategic design first.
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Focus on strategic design first.
Id ParentId Data 1 Parent 2 1 Child1 3 1 Child2
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Focus on strategic design first.
Id ParentId0 ParentId1 ParentId2 ParentId3 ParentId4 Data 1 Parent 2 1 Child1 3 1 2 Child2
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Wrong models cause accidental complexity
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Client Domain OLAP GraphDb StreamProcessing Events Hibernate
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Event Sourced Systems need a service bus
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Client Domain Bus OLAP GraphDb StreamProcessing publish 3nf Hibernate
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Client Domain Bus OLAP GraphDb StreamProcessing publish 3nf Hibernate
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Client Domain Bus OLAP GraphDb StreamProcessing publish 3nf Hibernate New Model?
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Client Domain OLAP GraphDb StreamProcessing Events Hibernate
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Client Domain OLAP GraphDb StreamProcessing Events Hibernate New Model?
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Event Sourcing is more complex!
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What big companies are using Event Sourcing?
Because obviously we make our decisions this way!
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Event Sourced systems must be slow
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Event Sourced systems must be object oriented
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What is the “bestest” Event Sourcing framework ever?
Cirqus of course, at least the guys are local when it sucks
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But what about all my data with Event Sourcing it must be huge!
If it fits on a micro-SD its not big data.
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CQRS is just a teaching pattern!
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Event Sourced systems must be slow
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Event Sourced systems must be object oriented
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But what about all my data with Event Sourcing it must be huge!
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Event Sourcing isn’t “enterprisey”
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Event Sourcing isn’t “enterprisey”
THANKS!
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