Go 1.8 lightning talk for plugins
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plugins
.gitignore
README.md
main.go

README.md

Go 1.8 lightning talk

https://golang.org/pkg/plugin/

  • A plugin is a shared object that can be loaded at run time.
  • Plugins are cached after being initialized.
  • Safe to use in multiple goroutines
  • Currently only works on linux :(

Load a plugin like this:

p, err := plugin.Open("plugin_name.so")
if err != nil {
	panic(err)
}

Access exported variables and functions (Symbols) like this:

symbol, err := p.Lookup("Symbol")
if err != nil {
	panic(err)
}

building a pluging:

go build -buildmode=plugin

Example

Here is an example of an RPC server that loads up the correct procedure lazily.

go build -buildmode=plugin -o plugins/hello.so plugins/hello.go
go build -buildmode=plugin -o plugins/do_it.so plugins/do_it.go
go run main.go

Play around with removing the .so files and hitting these urls

curl -X POST -H "Content-Type: application/json" -H "Cache-Control: no-cache" -H "Postman-Token: 8c453945-6848-cf8c-4b27-eac133b10c3c" -d '{
	"Type": "do_it",
	"Args": [
		"12",
		"True",
		"wat is happens"
		]
	
}' "http://127.0.0.1:8080/"
curl -X POST -H "Content-Type: application/json" -H "Cache-Control: no-cache" -H "Postman-Token: 0e968e38-6fcb-3ab0-095d-d0d948befe91" -d '{
	"Type": "hello",
	"Args":["Edmonton Go!"]
}' "http://127.0.0.1:8080/"