Go生成go动态库或静态库的方法(2)-木庄网络博客

实例

结构：
    -softplugin         //根目录
        -soft           //软件目录
        -plugins         //插件目录
        -itf            //接口目录

无自定义数据

// plugins/hello.go
package main
import "fmt"
func Hello(){
    fmt.Println("hello")
}
// go build -buildmode=plugin -o hello.so hello.go
 
 
// soft/basetype.go
package main
import (
    "os"
    "path"
    "plugin"
    "fmt"
)
 
func main(){
    //加载插件
    pluginDir := "../plugins"
    //扫描文件夹下所有so文件
    f, err := os.OpenFile(pluginDir, os.O_RDONLY, 0666)
    if err != nil {
        panic(err)
    }
    fi, err := f.Readdir(-1)
    if err != nil {
        panic(err)
    }
    plugins := make([]os.FileInfo, 0)
    for _, ff := range fi {
        if ff.IsDir() || path.Ext(ff.Name()) != ".so" {
            continue
        }
        plugins = append(plugins, ff)
        pdll, err := plugin.Open(pluginDir + "/" + ff.Name())
        if err != nil {
            fmt.Println(err)
            continue
        }
        plg, err := pdll.Lookup("Hello")
        if err != nil {
            panic(err)
        }
       plg.(func())()
    }
}
// go run basetype.go

定义插件接口 interface。

//------------------------------------------------------
// itf/itf1.go
package itf
type Printor interface{
    Print(v interface{})
}
 
//------------------------------------------------------
// plugins/p1.go
package main
import (
    "fmt"
    "softplugin/itf"
)
type ScreenPrintor struct{}
func (ScreenPrintor)Print(v interface{}){
    fmt.Println("p1p1 ",v)
}
func Install() Printor{
    return &ScreenPrintor{}
}
 
//-----------------------------------------------------
// soft/s1.go
package main
import (
    "softplugin/itf"
    "os"
    "path"
    "plugin"
    "fmt"
)
var(
    printors = make([]itf.Printor, 0)
)
 
func main(){
    //加载插件
    pluginDir := "../plugins"
    //扫描文件夹下所有so文件
    f, err := os.OpenFile(pluginDir, os.O_RDONLY, 0666)
    if err != nil {
        panic(err)
    }
    fi, err := f.Readdir(-1)
    if err != nil {
        panic(err)
    }
    plugins := make([]os.FileInfo, 0)
    for _, ff := range fi {
        if ff.IsDir() || path.Ext(ff.Name()) != ".so" {
            continue
        }
        plugins = append(plugins, ff)
        pdll, err := plugin.Open(pluginDir + "/" + ff.Name())
        if err != nil {
            fmt.Println(err)
            continue
        }
        plg, err := pdll.Lookup("Hello")
        if err != nil {
            panic(err)
        }
       printors = append(printors, (plg.(func() itf.Printor))())
    }
    for _, p := range printors {
        p.Print("pppp")
    }
     
}