Functional Event-Driven Architecture [Leanpub PDF/iPad/Kindle]

Explore the event-driven architecture (EDA) in a purely functional way. Learn to design and develop distributed systems that scale. Identify common design patterns in such systems.

In the same spirit of Practical FP in Scala, we will develop a distributed system written in Scala 3 that meets the requirements of a modern software architecture capable of processing billions of events per day at scale powered by Apache Pulsar and Fs2 streams.

The system also includes a Web Sockets service powered by Http4s, and two Web applications (one written in Elm; another in Scala.js), just for fun!

Although the application picks a particular design and implementation, the concepts should easily translate to other designs in the same space that can be built on top of Apache Kafka, Rabbit MQ, or other message brokers.

Additionally, essential reading material is recommended for those who wish to dive deeper into topics such as Distributed Systems, Streaming Systems, Event-Driven Applications, and Observability.

Have a look at the distributed system that supplements this book: https://github.com/gvolpe/trading

Preface
Acknowledgments
- People
- Software
- Fonts
Prerequisites
- Reading material
How to read this book
- Conventions used in this book
Part I: Concepts
1. Event-driven architecture
- 1.1 Introduction
  - 1.1.1 What problems does it solve?
  - 1.1.2 When to use it? When not?
- 1.2 Microservices architecture
  - 1.2.1 Scalability
  - 1.2.2 Fault tolerance
  - 1.2.3 Observability
  - 1.2.4 Versatility
- 1.3 CQRS/ES
  - 1.3.1 Commands
  - 1.3.2 Queries
  - 1.3.3 Reads & writes
  - 1.3.4 When to use it? When not?
  - 1.3.5 Frameworks
- 1.4 Summary
2. Distributed systems
- 2.1 Overview
  - 2.1.1 Identifying points of failure
  - 2.1.2 Consistency vs availability
- 2.2 Idempotence
  - 2.2.1 De-duplication
- 2.3 Atomicity
  - 2.3.1 Distributed transactions
  - 2.3.2 Change data capture
  - 2.3.3 Distributed locks
- 2.4 Summary
3. Stateless vs. Stateful
- 3.1 Stateless services, stateful brokers
  - 3.1.1 Stateful services
  - 3.1.2 Application clustering
- 3.2 Message-driven architecture
  - 3.2.1 Delivery guarantees
  - 3.2.2 Apache Kafka
  - 3.2.3 Apache Pulsar
  - 3.2.4 What should I use?
- 3.3 State snapshots
  - 3.3.1 Retention policy
- 3.4 Schema evolution
  - 3.4.1 Schema compatibility
  - 3.4.2 Versioning strategies
  - 3.4.3 Schema registry
- 3.5 Summary
Part II: Coding
4. Functional programming in Scala 3
- 4.1 Domain modeling
  - 4.1.1 Typeclass derivation
  - 4.1.2 Newtypes
  - 4.1.3 Refinement types
  - 4.1.3 Orphan instances
- 4.2 Typeclasses
- 4.3 HTTP routes
- 4.4 Effectful context
- 4.5 Dependent types
- 4.6 Summary
5. Effectful streams
- 5.1 Finite state machines
- 5.2 Resources and lifecycle
- 5.3 Data pipelines
  - 5.3.1 Real-time
  - 5.3.2 Batching
  - 5.3.3 Analytics
  - 5.3.4 Data source
- 5.4 Producer-consumer
  - 5.4.1 In-memory via Queue
  - 5.4.2 Distributed via Apache Pulsar
  - 5.4.3 Distributed via Apache Kafka
- 5.5 Summary
Part III: System
6. Trading system (core services)
- 6.1 Business requirements
  - 6.1.1 Overview
  - 6.1.2 Domain modeling
  - 6.1.3 Shared modules
- 6.2 Processor
  - 6.2.1 Commands
  - 6.2.2 Events
  - 6.2.3 Command-event relationship
  - 6.2.4 Entry point
  - 6.2.5 FSM
  - 6.2.6 Deep analysis
  - 6.2.7 Scalability
  - 6.2.8 Run
- 6.3 Alerts
  - 6.3.1 Datatypes
  - 6.3.2 Event-alert relationship
  - 6.3.3 FSM
  - 6.3.4 Entry point
  - 6.3.5 Scalability
  - 6.3.6 Run
- 6.4 Web Sockets
  - 6.4.1 Datatypes
  - 6.4.2 HTTP routes
  - 6.4.3 Events handler
  - 6.4.4 Unit tests
  - 6.4.5 Entry point
  - 6.4.6 Run
  - 6.4.7 Scalability
  - 6.4.8 Addendum
- 6.5 Summary
7. Trading system (alt services)
- 7.1 Snapshots
  - 7.1.1 Scalability
  - 7.1.2 Entry point
  - 7.1.3 FSM
  - 7.1.4 Run
- 7.2 Forecasts
  - 7.2.1 Commands
  - 7.2.2 Events
  - 7.2.3 Command-event relationship
  - 7.2.4 Engine
  - 7.2.5 SQL store
  - 7.2.6 Scalability
  - 7.2.7 Entry point
  - 7.2.8 Run
- 7.3 Feed
  - 7.3.1 Generators
  - 7.3.2 Run
- 7.4 Integration tests
  - 7.4.1 Redis suite
  - 7.4.2 SQL suite
- 7.5 Summary
8. Trading system (observability)
- 8.1 Tracing
  - 8.1.1 Distributed
  - 8.1.2 Centralized
- 8.2 Build & run
  - 8.2.1 Docker compose
  - 8.2.2 Continuous integration
  - 8.2.3 Smoke tests
- 8.3 Monitoring
  - 8.3.1 Prometheus
  - 8.3.2 Grafana
- 8.4 Deployment
  - 8.4.1 K8s cluster
  - 8.4.2 Pods management
- 8.5 Summary
9. Bonus: Web App
- 9.1 Entry point
- 9.2 Datatypes
- 9.3 View
- 9.4 Subscriptions
- 9.5 Updates
- 9.6 Build & run
- 9.7 Summary

10$ değerinde bir satıştan 8$, 20$ değerinde bir satıştan 16$ kazanın

7,99$ veya üzeri satışlarda %80 telif, 0,99$ ile 7,98$ arasındaki satışlarda 50 sent sabit ücret düşülerek %80 telif ödüyoruz. 10$'lık bir satıştan 8$, 20$'lık bir satıştan 16$ kazanıyorsunuz. Yani, kitabınızın iade edilmemiş 5000 kopyasını 20$'dan satarsak, 80.000$ kazanacaksınız.

(Evet, bazı yazarlar Leanpub'da bundan çok daha fazlasını kazandılar.)

Gerçekte, yazarlar Leanpub'da yazarak, yayınlayarak ve satarak 14 milyon dolardan fazla kazandılar.

Leanpub'da yazmak hakkında daha fazla bilgi edinin

Ücretsiz Güncellemeler. DRM İçermez.

If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).

Most Leanpub books are available in PDF (for computers), EPUB (for phones and tablets) and MOBI (for Kindle). The formats that a book includes are shown at the top right corner of this page.

Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.

Leanpub üzerinde Yazın ve Yayımlayın

Authors and publishers use Leanpub to publish amazing in-progress and completed ebooks, just like this one. You can use Leanpub to write, publish and sell your book as well! Leanpub is a powerful platform for serious authors, combining a simple, elegant writing and publishing workflow with a store focused on selling in-progress ebooks. Leanpub is a magical typewriter for authors: just write in plain text, and to publish your ebook, just click a button. It really is that easy.

Leanpub üzerinde nasıl yazabileceğinizi öğrenin

Functional Event-Driven Architecture

Ödeyeceğiniz Miktar

Yazarın kazandığı

Hakkında

Bu kitabı Paylaş

Kategoriler

Yazar

İçerik

Bu yazarın diğer kitapları

Leanpub Önkoşulsuz, Risksiz, %100 Mutluluk Garantilidir

10$ değerinde bir satıştan 8$, 20$ değerinde bir satıştan 16$ kazanın

Ücretsiz Güncellemeler. DRM İçermez.

Leanpub üzerinde Yazın ve Yayımlayın