Event-Driven Architecture

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1 EVENT-DRIVEN ARCHITECTURE

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1. The quest for scalability 2 A tale of a company...

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“ 3 Scalability is the property of a system to handle a growing amount of work by adding resources to the system.

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4 Scalability Development ● New features ● Continuous Deployment ● New team members ● New technologies Software ● Usage ● Concurrency ● Stored data ● Availability

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Scalability cube 5

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Monolithic Application 6

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Monolithic Application 7

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SOA Approach 8

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Virtualized SOA Approach 9

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Orchestrated & Virtualized SOA Approach 10

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2. Microservices 11 The silver bullet...

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Microservices Approach 12

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Microservices & API Gateway Approach 13

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Microservices & API Gateway Approach 14

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EVENT SOURCING 15

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“ 16 Event Sourcing ensures that all changes to application state are stored as a sequence of events. Not just can we query these events, we can also use the event log to reconstruct past states, and as a foundation to automatically adjust the state to cope with retroactive changes. - Martin Fowler

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Log- Structured Approach 17

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Event-Driven Architecture 20 ▪ 100% accurate audit logging ▪ Easy temporal queries ▪ Asynchronous communication ▪ Data Consistency ▪ Data recovery ▪ Horizontal scaling ▪ Loosely coupled services ▪ Act as Message Broker ▪ Idempotence

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Event-Driven Architecture 21

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Microservices & Event Sourcing Approach 22

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Event Sourcing & Data streams Approach 23

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Integrate Legacy Applications 24

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A better Microservices Approach 25

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Questions? 26

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References 27 ● https://guidoschmutz.wordpress.com/ ● http://microservices.io ● https://kafka.apache.org/ ● https://martinfowler.com/eaaDev/EventSourcing.html https://www.conﬂuent.io/blog/data-dichotomy-rethinking-the-way-we -treat-data-and-services/ ● https://engineering.linkedin.com/distributed-systems/log-what-every-s oftware-engineer-should-know-about-real-time-datas-unifying ● https://medium.com/@hugo.oliveira.rocha/what-they-dont-tell-you-abo ut-event-sourcing-6afc23c69e9a

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Thank you very much for your time 28