Golang for Jobseekers: Unleash the power of Go programming for career advancement (English Edition)

A comprehensive guide to mastering Golang and boosting your career prospects Key Features ● Gain a solid foundation in Golang application development, covering essential concepts and techniques. ● Explore the complete lifecycle of Golang applications, from development to successful deployment in production environments. ● Get a roadmap for further learning and skill enhancement after mastering the concepts in the book. Description Golang holds significance because of its emphasis on simplicity, readability, impressive performance, and built-in support for concurrency. If you want to elevate your Golang programming skills and become a more proficient developer, then this book is for you. “Golang for Jobseekers” starts by providing a comprehensive introduction to Go, covering its syntax, fundamental concepts, and unique features that make it an efficient language for development. It delves deeply into data structures and algorithms, equipping you with techniques to optimize your code and solve complex problems with elegance and speed. Furthermore, the book explores the art of building robust RESTful API applications in Go. It teaches you industry best practices and architectural patterns for creating scalable, secure, and maintainable APIs. The book then takes you through a step-by-step journey from development to production, demonstrating how to deploy Go applications in different environments, ranging from virtual machines to containers on Kubernetes. Lastly, it helps you understand essential concepts like monitoring and logging, enabling you to ensure the performance and health of your applications in real-world scenarios. By the end of the book, you will be equipped to confidently showcase your expertise during interviews, giving you a competitive edge in the job market. What you will learn ● Gain proficiency in data structures and algorithms using Golang. ● Learn how to develop a RESTful API application using Golang. ● Acquire the knowledge and skills required to deploy an application to a virtual machine. ● Explore the process of deploying an application in a containerized environment. ● Understand the essential concepts and practices for making applications "production ready”. Who this book is for Ideal for newcomers to the industry, this book explores the entire journey of application development, from concept to production-ready deployment. Table of Contents 1. Understanding Golang and its Potential 2. Golang Fundamentals 3. Exploring Data Structures 4. Understanding Algorithms 5. Getting Comfortable with Go Proverbs 6. Building REST APIs 7. Testing in Golang 8. Deploying a Golang Application in a Virtual Machine 9. Deploying a Containerized Golang Application 10. Microservices with Golang Applications 11. Introduction to Monitoring and Logging 12. Adding Concurrency in Golang Application 13. What is Next? Book title 1 Inner title 3 Copyright 4 Dedicated 4 About the Author 6 About the Reviewers 6 Acknowledgements 8 Preface 8 Code Bundle and Coloured Images 12 Piracy 12 Table of Contents 14 Chapter 1: Understanding Golang and its Potential 20 Introduction 20 Structure 20 Objectives 22 Characteristics of Golang Programming Language 22 Statically typed 22 Garbage collection 24 Cross-compilation 26 “Batteries Included” standard library 26 Version guarantees 26 What kind of development work is Golang used in? 28 Web applications 28 Command Line Interface (CLI) 28 Major applications written with Golang 28 Docker 30 Kubernetes 30 CockroachDB 32 Companies that use Golang 32 Cloudflare 32 Monzo 34 Conclusion 34 Chapter 2: Golang Fundamentals 36 Introduction 36 Structure 36 Objectives 38 Golang playground 38 Installing and running Golang locally 38 Main function in main package 40 Imports 40 Variable initialization 44 Basic types 44 List 48 Maps 52 Writing functions 52 Structs 58 Interfaces 64 Loops 68 Public versus private 72 Using “Go” verb 76 Channels 80 Errors 80 Conclusion 82 Chapter 3: Exploring Data Structures 84 Introduction 84 Structure 84 Objectives 86 Singly linked list 86 Doubly linked list 96 Circular linked list 98 Stack 100 Queue 102 Binary tree 104 Hashed maps 108 Conclusion 112 Chapter 4: Understanding Algorithms 114 Introduction 114 Structure 114 Objectives 116 Big O notation 116 Sorting algorithms and their importance 118 Bubble sort 118 Merge sort 122 Quick sort 126 Binary search 132 Dynamic programming 134 Conclusion 138 Chapter 5: Getting Comfortable with Go Proverbs 140 Introduction 140 Structure 142 Objectives 142 The bigger the interface, the weaker the interface 142 Make the zero value useful 142 interface{} says nothing 144 Gofmt’s style is no one’s favorite, yet everyone’s favorite 144 Errors are values 148 Do not just check errors, handle them gracefully 148 Documentation is for users 150 Do not panic 152 Accept interfaces, return structs 154 Never use global variables 158 Conclusion 160 Chapter 6: Building REST APIs 162 Introduction 162 Structure 164 Objectives 164 Why learn to build REST APIs? 164 HTTP verbs 166 HTTP status codes 168 Building a “Hello World” REST API Golang application 170 Building a URL shortener 174 Conclusion 198 Chapter 7: Testing in Golang 200 Introduction 200 Structure 202 Objectives 202 Why build tests? 202 Test-driven development 202 Writing a simple unit test 204 Table driven tests 206 Mocking 214 Setup and teardown of environments within tests 220 HTTP testing 226 Golden files 228 Conclusion 230 Chapter 8: Deploying a Golang Application in a Virtual Machine 230 Introduction 230 Structure 232 Objectives 232 Using SSH 232 Using SCP 240 Using Systemd to run the Golang application 246 Debugging the Golang application on the server 250 Real-life deployments with virtual machines 252 Conclusion 254 Chapter 9: Deploying a Containerized Golang Application 256 Introduction 256 Structure 258 Objectives 258 Docker basics 258 Docker command basics 260 Building a Golang application in a Docker container 270 Using Docker compose on a local workstation 284 Using docker-compose on a virtual machine 294 Deploying the application via Kubernetes 300 Conclusion 306 Chapter 10: Microservices with Golang Applications 308 Introduction 308 Structure 310 Objectives 310 What are microservices, and why are microservices? 310 Demo-ing an application stack with multiple applications via docker-compose 314 Demo-ing an application with multiple applications in Kubernetes 336 Conclusion 348 Chapter 11: Introduction to Monitoring and Logging 350 Introduction 350 Structure 352 Objectives 352 Why monitoring and logging are important? 352 Introduction to Prometheus 354 Instrumenting an application with metrics to be consumed by Prometheus 356 Viewing metrics on Prometheus 360 Quick word on logging 368 Conclusion 368 Chapter 12: Adding Concurrency in Golang Application 370 Introduction 370 Structure 372 Objectives 372 Concurrency features in Golang 372 Exchanging messages and persisting it locally 374 Using channels to receive interrupts in a program 378 Live reload of configurations 380 Parallelize parts of an application 384 Conclusion 388 Chapter 13: What is Next? 388 Introduction 388 Structure 388 Objectives 390 GRPC—alternative communication protocols 390 SRE principles for reliable applications 394 Profiling 394 Working with data storage 398 Embedding files 402 Generics 404 Fuzzing 406 Conclusion 408 Index 408 Back title 414 "Golang holds significance because of its emphasis on simplicity, readability, impressive performance, and built-in support for concurrency. If you want to elevate your Golang programming skills and become a more proficient developer, then this book is for you. "Golang for Jobseekers" starts by providing a comprehensive introduction to Go, covering its syntax, fundamental concepts, and unique features that make it an efficient language for development. It delves deeply into data structures and algorithms, equipping you with techniques to optimize your code and solve complex problems with elegance and speed. Furthermore, the book explores the art of building robust RESTful API applications in Go. It teaches you industry best practices and architectural patterns for creating scalable, secure, and maintainable APIs. The book then takes you through a step-by-step journey from development to production, demonstrating how to deploy Go applications in different environments, ranging from virtual machines to containers on Kubernetes. Lastly, it helps you understand essential concepts like monitoring and logging, enabling you to ensure the performance and health of your applications in real-world scenarios. By the end of the book, you will be equipped to confidently showcase your expertise during interviews, giving you a competitive edge in the job market. Ideal for newcomers to the industry, this book explores the entire journey of application development, from concept to production-ready deployment."-- Provided by publisher