英文:
is it possible to make simple dependency injection in golang
问题
我来自Node.js和Nest.js的世界,那里的依赖注入(DI)非常简单,并由框架提供。在使用Go构建服务时,我是否可以或应该考虑使用依赖注入?
英文:
I come from node.js and nest.js world, where DI is simple and provided by a framework. Can or should I consider using dependency injection when building services on go?
答案1
得分: 3
是的,Go语言中是可以实现依赖注入的。
以下是一个简单的三步骤的Go语言依赖注入系统:
假设你有一个包A,它不应该导入包B,但需要调用该包中的一些函数,例如Load()和Save()。
- 在包A中,定义一个包含这些函数的接口类型。
type Storage interface {
Load(string) []byte
Save(string, []byte)
}
包A中的类型可以引用该接口,并调用Load()和Save(),而不需要知道这些调用的实际接收者。
type StructA struct {
content []byte
storage Storage
}
func NewStructA(s Storage) *StructA {
return &StructA{
content: ...,
storage: s,
}
}
func (a *StructA) Save(name string) {
a.storage.Save(name, a.content)
}
func (a *StructA) Load(name string) {
a.content = a.storage.Load(name)
}
- 在包B中,实现Load()和Save()。
type StoreB struct {
data map[string][]byte
}
func (b *StoreB) Save(name string, contents []byte) {
b.data[name] = contents
}
func (b *StoreB) Load(name string) []byte {
return b.data[name]
}
- 在
main
包中,连接各个组件。
storage := &B.StoreB{}
a := A.NewStructA(storage)
a.Save()
现在你可以添加其他存储提供者(包C、D等),并在main
中将它们连接起来。
storage2 := &C.StoreC{}
a2 := A.NewStructA(storage2)
a2.Save()
更详细的讨论可以参考这里:https://appliedgo.net/di/
英文:
Yes, it is possible in Go.
A simple three-step DI system for Go:
Imagine you have a package A that shall not import package B but call some functions from that package; for example, functions Load() and Save().
- In package A, define an interface type with these functions.
type Storage interface {
Load(string) []byte
Save(string, []byte)
}
A type in package A can then refer to that interface and call Load() and Save() without knowing the actual receivers of these calls.
type StructA struct {
content []byte
storage Storage
}
func NewStructA(s Storage) *StructA {
return &StructA{
content: ...,
storage: s,
}
}
func (a *StructA) Save(name string) {
a.storage.Save(name, a.content)
}
func (a *StructA) Load(name string) {
a.content = a.storage.Load(name)
}
- In package B, implement Load() and Save().
type StoreB struct {
poem []byte
}
func (b *StoreB) Save(name string, contents []byte) {
// let's say StoreB contains a map called data
b.data[name] = contents
}
func (b *StoreB) Load(name string) []byte {
return b.data[name]
}
- In package
main
, connect the wires.
storage := B.StructB
a := A.NewStructA(storage)
a.Save()
Now you can add other storage provides (package C, D,...) and wire them up in main
.
storage2 := C.StructC
a2 := A.NewStructA(storage2)
a2.Save()
A more detailed discussion is here: https://appliedgo.net/di/
答案2
得分: 2
一个基于依赖注入的Go应用程序框架。
https://github.com/uber-go/fx
一个基于反射的Go依赖注入工具包。https://github.com/uber-go/dig
英文:
A dependency injection based application framework for Go.
https://github.com/uber-go/fx
A reflection based dependency injection toolkit for Go. https://github.com/uber-go/dig
答案3
得分: 0
是的,你应该在Go语言中考虑使用依赖注入(DI),DI在Go语言中具有与其他语言相同的优势。通过使用接口,可以很容易地在Go语言中实现依赖注入。
英文:
Yes, you should consider DI in go, DI has same advantages in go as any other language. It can be easily achieved in go by using interfaces.
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