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Event-Driven Architecture in Golang

You're reading from   Event-Driven Architecture in Golang Building complex systems with asynchronicity and eventual consistency

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Product type Paperback
Published in Nov 2022
Publisher Packt
ISBN-13 9781803238012
Length 384 pages
Edition 1st Edition
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Author (1):
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Michael Stack Michael Stack
Author Profile Icon Michael Stack
Michael Stack
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Toc

Table of Contents (18) Chapters Close

Preface 1. Part 1: Event-Driven Fundamentals
2. Chapter 1: Introduction to Event-Driven Architectures FREE CHAPTER 3. Chapter 2: Supporting Patterns in Brief 4. Chapter 3: Design and Planning 5. Part 2: Components of Event-Driven Architecture
6. Chapter 4: Event Foundations 7. Chapter 5: Tracking Changes with Event Sourcing 8. Chapter 6: Asynchronous Connections 9. Chapter 7: Event-Carried State Transfer 10. Chapter 8: Message Workflows 11. Chapter 9: Transactional Messaging 12. Part 3: Production Ready
13. Chapter 10: Testing 14. Chapter 11: Deploying Applications to the Cloud 15. Chapter 12: Monitoring and Observability 16. Index 17. Other Books You May Enjoy

Building read models from multiple sources

The new Search module will be returning order data that should not require any additional queries to other services to be useful. We want to be able to return the customer’s name, product name, and store names in the details we return. We also want to be able to locate the orders using more than their identities.

The search goals of this new module are as follows:

  • Search for orders belonging to specific customer identities
  • Search for orders by store and product identities
  • Search for orders created within a date range
  • Search for orders that have a total within a range
  • Search for orders by their status

The read model that we will be building is not too different from what an order in the Order Processing module looks like:

Figure 7.14 – The order read model structures

To support searching using the previously mentioned filters, we will be writing some additional metadata...

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