Pingo 是一个用来为 Go 程序编写插件的简单独立库,因为 Go 本身是静态链接的,因此所有插件都以外部进程方式存在。Pingo 旨在简化标准 RPC 包,支持 TCP 和 Unix 套接字作为通讯协议。当前还不支持远程插件,如果有需要,远程插件很快会提供。
使用 Pingo 创建一个插件非常简单,首先新建目录,如 “plugins/hello-world” ,然后在该目录下编写 main.go:
// Always create a new binary package main import "github.com/dullgiulio/pingo" // Create an object to be exported type MyPlugin struct{} // Exported method, with a RPC signature func (p *MyPlugin) SayHello(name string, msg *string) error { *msg = "Hello, " + name return nil } func main() { plugin := &MyPlugin{} // Register the objects to be exported pingo.Register(plugin) // Run the main events handler pingo.Run() }
编译:
$ cd plugins/hello-world $ go build
接下来就可以调用该插件:
package main import ( "log" "github.com/dullgiulio/pingo" ) func main() { // Make a new plugin from the executable we created. Connect to it via TCP p := pingo.NewPlugin("tcp", "plugins/hello-world/hello-world") // Actually start the plugin p.Start() // Remember to stop the plugin when done using it defer p.Stop() var resp string // Call a function from the object we created previously if err := p.Call("MyPlugin.SayHello", "Go developer", &resp); err != nil { log.Print(err) } else { log.Print(resp) } }