Book Image

Go: Building Web Applications

By : Nathan Kozyra, Mat Ryer
Book Image

Go: Building Web Applications

By: Nathan Kozyra, Mat Ryer

Overview of this book

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software. It is a statically typed language with syntax loosely derived from that of C, adding garbage collection, type safety, some dynamic-typing capabilities, additional built-in types such as variable-length arrays and key-value maps, and a large standard library. This course starts with a walkthrough of the topics most critical to anyone building a new web application. Whether it’s keeping your application secure, connecting to your database, enabling token-based authentication, or utilizing logic-less templates, this course has you covered. Scale, performance, and high availability lie at the heart of the projects, and the lessons learned throughout this course will arm you with everything you need to build world-class solutions. It will also take you through the history of concurrency, how Go utilizes it, how Go differs from other languages, and the features and structures of Go's concurrency core. It will make you feel comfortable designing a safe, data-consistent, and high-performance concurrent application in Go. This course is an invaluable resource to help you understand Go's powerful features to build simple, reliable, secure, and efficient web applications.
Table of Contents (6 chapters)

Chapter 5. Locks, Blocks, and Better Channels

Now that we're starting to get a good grasp of utilizing goroutines in safe and consistent ways, it's time to look a bit more at what causes code blocking and deadlocks. Let's also explore the sync package and dive into some profiling and analysis.

So far, we've built some relatively basic goroutines and complementary channels, but we now need to utilize some more complex communication channels between our goroutines. To do this, we'll implement more custom data types and apply them directly to channels.

We've not yet looked at some of Go's lower-level tools for synchronization and analysis, so we'll explore sync.atomic, a package that—along with sync.Mutex—allows for more granular control over state.

Finally, we'll delve into pprof, a fabulous tool provided by Go that lets us analyze our binaries for detailed information about our goroutines, threads, overall heap, and blocking...