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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

Coming up with a testing strategy

For applications such as MallBots, we should develop a testing strategy that tests whether the application code does what it is supposed to be doing. It should also check whether various components communicate and interact with each other correctly and that the application works as expected:

Figure 10.1 – Our testing strategy as a pyramid or ziggurat

Our testing strategy will have four parts:

  • Unit tests
  • Integration tests
  • Contract tests
  • End-to-end tests

Unit tests are a no-brainer addition to our strategy; we want to ensure the code we write does what we intend it to do. We want to test the input and output from the module core and include an integration test to test the dependencies that it uses. We will use contract tests to detect any breaking changes to the application’s many APIs and messages that tie the modules together. Finally, we want to run tests that check that the application...

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