Book Image

Event-Driven Architecture in Golang

By : Stack
5 (1)
Book Image

Event-Driven Architecture in Golang

5 (1)
By: 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)
1
Part 1: Event-Driven Fundamentals
5
Part 2: Components of Event-Driven Architecture
12
Part 3: Production Ready

Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: “If all the participants have responded positively, then the coordinator will send a COMMIT message to all of the participants and the distributed transaction will be complete.”

A block of code is set as follows:

BEGIN;
-- execute queries, updates, inserts, deletes …
PREPARE TRANSACTION 'bfa1c57a-d99d-4d74-87a9-3aaabcc754ee';

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

func NewCommandHandlers(
    app application.App,) ddd.CommandHandler
        [ddd.Command] {
    return commandHandlers{
        app: app,

Any command-line input or output is written as follows:

--- PASS: TestApplication_AddItem (0.00s)
    --- PASS: TestApplication_AddItem/NoBasket (0.00s)
    --- PASS: TestApplication_AddItem/NoProduct (0.00s)
    --- PASS: TestApplication_AddItem/NoStore (0.00s)
    --- PASS: TestApplication_AddItem/SaveFailed (0.00s)
    --- PASS: TestApplication_AddItem/Success (0.00s)
PASS

Bold: Indicates a new term, an important word, or words that you see on screen. For instance, words in menus or dialog boxes appear in bold. Here is an example: “The Customers module remains uncoupled from the Order Processing module because we do not have any explicit ties to the Order Processing module in this handler.”

Tips or Important Notes

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