Book Image

.Go Programming Blueprints - Second Edition

By : Mat Ryer
Book Image

.Go Programming Blueprints - Second Edition

By: Mat Ryer

Overview of this book

Go is the language of the Internet age, and the latest version of Go comes with major architectural changes. Implementation of the language, runtime, and libraries has changed significantly. The compiler and runtime are now written entirely in Go. The garbage collector is now concurrent and provides dramatically lower pause times by running in parallel with other Go routines when possible. This book will show you how to leverage all the latest features and much more. This book shows you how to build powerful systems and drops you into real-world situations. You will learn to develop high quality command-line tools that utilize the powerful shell capabilities and perform well using Go's in-built concurrency mechanisms. Scale, performance, and high availability lie at the heart of our projects, and the lessons learned throughout this book will arm you with everything you need to build world-class solutions. You will get a feel for app deployment using Docker and Google App Engine. Each project could form the basis of a start-up, which means they are directly applicable to modern software markets.
Table of Contents (19 chapters)
Go Programming Blueprints Second Edition
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Preface

Running apps with multiple modules


For applications such as ours that have multiple modules, we need to list out all the YAML files for the goapp command.

To serve our new application, in a terminal, execute this:

goapp serve dispatch.yaml default/app.yaml api/app.yaml
     web/app.yaml

Starting with the dispatch file, we are listing all the associated configuration files. If you miss any, you will see an error when you try to serve your application. Here, you will notice that the output now lists that each module is being deployed on a different port:

We can access modules directly by visiting each port, but luckily we have our dispatcher running on port :8080, which will do that for us based on the rules we specified in our dispatch.yaml configuration file.

Testing locally

Now that we have built our application, head over to localhost:8080 to see it in action. Use the features of the application by performing the following steps:

  1. Log in using your real e-mail address (that way, you'll see...