组件

组件是唯一的持久化的实例

有多种方法加载组件

初始化

创建应用的时候加载组件。

来自配置

app.yml

hello:
    message: "hello"

main.go

package main

import (
	"github.com/langwan/langgo"
	"github.com/langwan/langgo/components/hello"
)

func main() {
	langgo.Run(&hello.Instance{})
	fmt.Println(hello.Get().Message)
}

outout

hello

hello.Get().Message 来自 "app.yml".

hello.Get() 获取组件的唯一持久化实例

langgo-examples/0.5.x/Component/Configuration at main · langwan/langgo-examplesGitHub

来自参数

main.go

package main

import (
	"github.com/langwan/langgo"
	"github.com/langwan/langgo/components/hello"
)

func main() {
	langgo.Run(&hello.Instance{Message: "hello"})
	fmt.Println(hello.Get().Message)
}

output

hello

langgo-examples/0.5.x/Component/Parameters at main · langwan/langgo-examplesGitHub

加载多个组件

app.yml

hello:
  message: "hello langgo"
sqlite:
  path: database.db

main.go

package main

import (
	"fmt"
	"github.com/langwan/langgo"
	"github.com/langwan/langgo/components/hello"
	"github.com/langwan/langgo/components/sqlite"
)

func main() {
	langgo.Run(&hello.Instance{}, &sqlite.Instance{Path: "./database.db"})
	fmt.Println(hello.Get().Message)
	var i int64
	sqlite.Get().Raw("SELECT 1").Scan(&i)
	fmt.Println(i)
}

output

hello
1

langgo-examples/0.5.x/Component/Loading-Components at main · langwan/langgo-examplesGitHub

运行时

使用 langgo.LoadComponents() 方法加载组件。

main.go

package main

import (
	"fmt"
	"github.com/langwan/langgo"
	"github.com/langwan/langgo/components/hello"
	"github.com/langwan/langgo/components/sqlite"
)

func main() {
	langgo.Run(&sqlite.Instance{Path: "./database.db"})
	langgo.LoadComponents(&hello.Instance{Message: "hello langgo"})
	fmt.Println(hello.Get().Message)
}

output

hello

langgo-examples/0.5.x/Component/Runtime at main · langwan/langgo-examplesGitHub