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You're reading from Go: Design Patterns for Real-World Projects Build production-ready solutions in Go using cutting-edge technology and techniques

Product type Course

Published in Jun 2017

Publisher Packt

ISBN-13 9781788390552

Length 1091 pages

Edition 1st Edition

Languages

Concepts

Design Patterns

Authors (3):

Mario Castro Contreras

Mat Ryer

Vladimir Vivien

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Table of Contents (38) Chapters

Go: Design Patterns for Real-World Projects

Credits

Preface

Bibliography

1. A First Step in Go FREE CHAPTER

2. Go Language Essentials

3. Go Control Flow

4. Data Types

5. Functions in Go

6. Go Packages and Programs

7. Composite Types

8. Methods, Interfaces, and Objects

9. Concurrency

10. Data IO in Go

11. Writing Networked Services

12. Code Testing

13. Ready... Steady... Go!

14. Creational Patterns - Singleton, Builder, Factory, Prototype, and Abstract Factory Design Patterns

15. Structural Patterns - Composite, Adapter, and Bridge Design Patterns

16. Structural Patterns - Proxy, Facade, Decorator, and Flyweight Design Patterns

17. Behavioral Patterns - Strategy, Chain of Responsibility, and Command Design Patterns

18. Behavioral Patterns - Template, Memento, and Interpreter Design Patterns

19. Behavioral Patterns - Visitor, State, Mediator, and Observer Design Patterns

20. Introduction to Gos Concurrency

21. Concurrency Patterns - Barrier, Future, and Pipeline Design Patterns

22. Concurrency Patterns - Workers Pool and Publish/Subscriber Design Patterns

23. Chat Application with Web Sockets

24. Adding User Accounts

25. Three Ways to Implement Profile Pictures

26. Command-Line Tools to Find Domain Names

27. Building Distributed Systems and Working with Flexible Data

28. Exposing Data and Functionality through a RESTful Data Web Service API

29. Random Recommendations Web Service

30. Filesystem Backup

31. Building a Q&A Application for Google App Engine

32. Micro-services in Go with the Go kit Framework

33. Deploying Go Applications Using Docker

1. Good Practices for a Stable Go Environment

Running our solution

It's time to see our code in action. Ensure that you have nsqlookupd, nsqd, and mongod running in separate terminal windows with the following:

nsqlookupd
nsqd --lookupd-tcp-address=127.0.0.1:4160
mongod --dbpath ./db

If you haven't already done so, make sure the twittervotes program is running too. Then, in the counter folder, build and run our counting program:

go build -o counter
./counter

You should see a periodic output describing what work counter is doing, such as the following:

No new votes, skipping database update
Updating database...
map[win:2 happy:2 fail:1]
Finished updating database...
No new votes, skipping database update
Updating database...
map[win:3]
Finished updating database...

Tip

The output will, of course, vary since we are actually responding to real, live activity on Twitter.

We can see that our program is receiving vote data from NSQ and reports to update the database with the results. We can confirm this by opening the MongoDB shell and querying...

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You're reading from Go: Design Patterns for Real-World Projects Build production-ready solutions in Go using cutting-edge technology and techniques

Table of Contents (38) Chapters

Running our solution

Tip

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Authors (3)

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