Plumego Advanced Guide: Designing Explicit, Scalable Go Services

Introduction: Beyond the Basics

The introductory Plumego documentation explains what Plumego is and why it exists. This guide focuses on a different question:

How do you design serious, long-lived systems with Plumego?

This article assumes that you already understand:

• Go fundamentals
• HTTP server basics
• The core Plumego APIs
• The philosophy of explicitness

What follows is an advanced, production-oriented tutorial. We will explore architectural patterns, not just APIs. The emphasis is on design decisions, trade-offs, and operational correctness—the areas where Plumego provides leverage without hiding complexity.

Lua is simple on the surface, but extremely powerful underneath.
This article explores metatables, metamethods, coroutines, advanced module design, and a set of practical patterns used in games, tools, and embedded systems.

All examples are fully runnable with standard Lua 5.3/5.4.

1. Metatables: Lua’s Custom Behavior Engine

Metatables let you customize how tables behave—similar to operator overloading, custom indexing, inheritance, and more.

1.1 Basic Example: __index Fallback

local defaults = {hp = 100, mp = 50}

local player = {}
setmetatable(player, {
  __index = defaults
})

print(player.hp)  -- 100
print(player.mp)  -- 50

Explanation: