defval / di

🛠 A full-featured dependency injection container for go programming language.

DI

DI is a dependency injection library for the Go programming language.

Dependency injection is a form of inversion of control that increases modularity and extensibility in your programs. This library helps you organize responsibilities in your codebase and makes it easy to combine low-level implementations into high-level behavior without boilerplate.

Features

• Intuitive auto wiring
• Interface implementations
• Constructor injection
• Optional injection
• Field injection
• Lazy-loading
• Tagging
• Grouping
• Iteration
• Decoration
• Cleanup
• Container Chaining / Scopes

Installation

go get github.com/defval/di

Documentation

You can use the standard pkg.go.dev and inline code comments. If you are new to auto-wiring libraries such as google/wire or uber-go/dig, start with the tutorial.

Essential Reading

• Tutorial
• Examples
• Advanced Features

Example Usage

package main

import (
	"context"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"

	"github.com/defval/di"
)

func main() {
	di.SetTracer(&di.StdTracer{})
	// create container
	c, err := di.New(
		di.Provide(NewContext),  // provide application context
		di.Provide(NewServer),   // provide http server
		di.Provide(NewServeMux), // provide http serve mux
		// controllers as []Controller group
		di.Provide(NewOrderController, di.As(new(Controller))),
		di.Provide(NewUserController, di.As(new(Controller))),
	)
	// handle container errors
	if err != nil {
		log.Fatal(err)
	}
	// invoke function
	if err := c.Invoke(StartServer); err != nil {
		log.Fatal(err)
	}
}

Full code available here.

Questions

If you have any questions, feel free to create an issue.