Advanced GoLang
3 days
Overview
The GoLang training course is project-based: building a shared “game” server that students can use to interact with each other via defined APIs. There is also a strong “code reading” portion, whereby students can check their understanding of Go by reading and modifying open-source Go Projects. This course will explore concurrency (by diving into more concurrency patterns) and the standard library, as well as provide more coding activities using popular Go libraries/frameworks (such as logging and microservices).
Prerequisites
- Familiarity with Docker Basic Familiarity with Go.
- Experience with Kubernetes in a Production environment.
- Nice to have: Managed db & servers
Machine:
- Minimum Specs 8GB RAM
- 4-Core i5 or higher
- Access to K8s cluster (Recommended local setup with Kind)
Audience
After attending the class, attendees should be able to
Drive end-to-end development with emergent design concepts.
Course Content
Why Go?
- Setting up Go environment: $GOPATH & $PATH: Including setting up VSCode, Setting up delve debugger (optional), Check using 101-workshop repo README.md
- Introduce Goroutines: sync.WaitGroup, GOMAXPROCS, Go scheduler
- go build and go run: binaries ( GOOS & GOARCH / CGO_ENABLED)
- Syntax overview (Refresher only): Variables, packages and functions (Multiple Returns Named, return values Zero, values Type conversions Type, inference Constants, Constants in standard library Used like enums)
- Flow control: Foras while, Range, Forever
- If: with statements
- Switch statements: no break, statements are optional, top-down execution - where execution stops after a case succeeds
- Ranges
- Defer: stack-based execution
- More types: Pointers Struct Fields, Imports / Exports, Pointers & structs
- Arrays
- Slices: how they affect the underlying array, len and capacity
- Maps: map, len only, lookup, insert & delete.
- Defer, panic and recover: Testing & benchmarking in Go
- xUnit style tests using built-in testing package
- Using testify/assert: Packaging & Imports
- Directory layout: Working with third-party packages - Go Modules, Higher-order functions
- Functions: Methods and interfaces
- Methods and pointer indirection
- Receiver functions: pointer receivers vs. value receivers, interfaces, implicit implementation
- nil interface
- empty interface: error
- Errors in Go 1.13: Inheritance in Go
- Through composition: Concurrency
- Goroutines: GOMAXPROCS, Go scheduler
- Channels
- Select
- Context package: Concurrency patterns, Other built-in packages
- Flag
- Os: Awesome 3rd party packages
- Validator
- Viper: Building web applications in Golang
- Introducing net/http
- Using gorilla/mux for ReSTful APIs: Performance tuning, instrumentation & analysis
- Profiling
- Go runtime: Garbage collector, Understanding Go's Scheduler
- Tracing: HTTP Tracing
- Escape analysis: go build -gcflags "-m -m", Understanding Stack and Heap memory, Interop
- Cgo: Example: net/http
- package plugin
- Conditional compilation
- Go generate: stringer tool, Writing your own K8s operator in Go using Operator Framework
