Introduction to Microservices with NService Bus
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A presentation on building microservices using the NServiceBus framework given to the Boulder .NET User Group.
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Introduction to Microservices with NService Bus
- 7. • A WEB SERVICE OR REST SERVICE • A CLASS WITH SERVICE IN THE NAME • JUST FUNCTIONALITY • E.G., CALCULATION AND VALIDATION • ONLY HAS DATA • E.G., CRUD ENTITY
- 9. • • • •
- 11. Service Service Service Service ServiceService Service User Interfaces Middle Tiers Databases Service Caches Service Business Capability Business Capability
- 12. • SYNCHRONOUS • REQUIRES A RESPONSE • HTTP REQUEST/RESPONSE • QUERIES • ASYNCHRONOUS • NO RESPONSE REQUIRED • IDEMPOTENT • MESSAGE PASSING, EVENTS AND COMMANDS • NOT ASYNC/AWAIT
- 13. PaymentOrder PaymentG ateway UI var orderId = orderService.PlaceOrder(items); var paymentId = paymentService.MakePayment(order.id, paymentMethodId, amount); 3 Timeline Temporal Coupling
- 14. Subscriber Publisher subscribe publish publish I would like to be notified of certain events and here is the address of where you should send those notifications to.
- 16. Dead Letter Queue Error Queue Host Host Host External API UI 3
- 17. NSERVICEBUS
- 18. Composite UI Web APIs / API Gateway Command Handlers Event Handlers Sagas Message Bus Data
- 19. ServerClientUI MVVM Framework Client Side Service Bus Web APIs Service Bus Databases Composite UIs UI Element Controller Web API R UI Element Controller Web API MessageBus MessageBus W Host Host
- 21. 1. SOURCE CODE - HTTPS://GITHUB.COM/CRMORGAN/NSERVICEBUS-INTRO 2. ADVANCED DISTRIBUTED SYSTEMS DESIGN COURSE - HTTPS://PARTICULAR.NET/ADSD 3. LOOSELY COUPLED ORCHESTRATION WITH MESSAGING - HTTPS://WWW.YOUTUBE.COM/WATCH?V=FPBKZ24QKZI&F 4. SO YOU THINK YOU KNOW PUB/SUB - HTTPS://WWW.INFOQ.COM/PRESENTATIONS/PUB-SUB-DOMAINS 5. HTTPS://DOCS.PARTICULAR.NET/GET-STARTED/ 6. HTTPS://PARTICULAR.NET/VIDEOS 7. HTTPS://MICRO-FRONTENDS.ORG/
Editor's Notes
- "Big balls of mud usually happen not because of the technology but because you don't have the discipline on the team to maintain the quality of the design over time.“ "A broken, dysfunctional organization driven by meeting unhealthy goals and metrics will produce broken, dysfunctional systems." Jimmy Bogard (NDC London Avoiding Microservice Megadisasters) In a distributed monolith, it is hard to make isolated changes in just one part (or service) without requiring changes to several other parts of the system. Therefore deploys are slow and risky and continuous delivery is impractical. This can have profound business implications. “Making changes in lots different places is slower, and deploying lots of services at once is risky – both of which we want to avoid.” - Sam Newman
- Latency is Zero: Many times slower than in-memory access) OMG slower! In process 5-10 nanoseconds Multiple processes on same box microseconds Local network 100-200 microseconds WAN 50 milliseconds Internet 100s of milliseconds
- Having an asynchronous business processes and using a queueing based architecture to do it are two different things.