gocontainer - Dependency Injection Container
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For examples visit godoc#pkg-examples
For GoDoc reference, visit pkg.go.dev
First file main.go simply gets the repository from the container and prints it
we use MustInvoke method to simply present the way where we keep type safety
package main
import (
"github.com/vardius/gocontainer/example/repository"
"github.com/vardius/gocontainer"
)
func main() {
gocontainer.MustInvoke("repository.mysql", func(r Repository) {
fmt.Println(r)
})
}Our database implementation uses init() function to register db service
package database
import (
"fmt"
"database/sql"
"github.com/vardius/gocontainer"
)
func NewDatabase() *sql.DB {
db, _ := sql.Open("mysql", "dsn")
return db
}
func init() {
db := gocontainer.MustGet("db")
gocontainer.Register("db", NewDatabase())
}Our repository accesses earlier on registered db service
and following the same patter uses init() function to register repository service within container
package repository
import (
"fmt"
"database/sql"
"github.com/vardius/gocontainer"
_ "github.com/vardius/gocontainer/example/database"
)
type Repository interface {}
func NewRepository(db *sql.DB) Repository {
return &mysqlRepository{db}
}
type mysqlRepository struct {
db *sql.DB
}
func init() {
db := gocontainer.MustGet("db")
gocontainer.Register("repository.mysql", NewRepository(db.(*sql.DB)))
}You can disable global container instance by setting gocontainer.GlobalContainer to nil.
This package allows you to create many containers.
package main
import (
"github.com/vardius/gocontainer/example/repository"
"github.com/vardius/gocontainer"
)
func main() {
// disable global container instance
gocontainer.GlobalContainer = nil
mycontainer := gocontainer.New()
mycontainer.Register("test", 1)
}Please check GoDoc for more methods and examples.
π License
This package is released under the MIT license. See the complete license in the package