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Event-Driven Architecture in Golang

Event-Driven Architecture in Golang

By : Michael Stack
4.9 (11)
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Event-Driven Architecture in Golang

Event-Driven Architecture in Golang

4.9 (11)
By: Michael Stack

Overview of this book

Event-driven architecture in Golang is an approach used to develop applications that shares state changes asynchronously, internally, and externally using messages. EDA applications are better suited at handling situations that need to scale up quickly and the chances of individual component failures are less likely to bring your system crashing down. This is why EDA is a great thing to learn and this book is designed to get you started with the help of step-by-step explanations of essential concepts, practical examples, and more. You’ll begin building event-driven microservices, including patterns to handle data consistency and resiliency. Not only will you learn the patterns behind event-driven microservices but also how to communicate using asynchronous messaging with event streams. You’ll then build an application made of several microservices that communicates using both choreographed and orchestrated messaging. By the end of this book, you’ll be able to build and deploy your own event-driven microservices using asynchronous communication.
Table of Contents (18 chapters)
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1
Part 1: Event-Driven Fundamentals
5
Part 2: Components of Event-Driven Architecture
12
Part 3: Production Ready

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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