Dbus minimal example in go, rudimentary implementation of http://www.galago-project.org/specs/notification/0.9/

client.go

package main

import (
	"github.com/guelfey/go.dbus"
)

func main() {
	conn, err := dbus.SessionBus()
	if err != nil {
		panic(err)
	}

	// func (conn *Conn) Object(dest string, path ObjectPath) *Object
	obj := conn.Object("org.freedesktop.Notifications", "/org/freedesktop/Notifications")

	// Interface from the specification:
	// UINT32 org.freedesktop.Notifications.Notify (STRING app_name, UINT32 replaces_id, STRING app_icon, STRING summary, STRING body, ARRAY actions, DICT hints, INT32 expire_timeout);

	// func (o *Object) Call(method string, flags Flags, args ...interface{}) *Call
	call := obj.Call("org.freedesktop.Notifications.Notify", 0, "c¼h", uint32(0), "", "Hallo Chaostreff!", "Ich begrüße euch herzlich zu meiner c¼h!", []string{}, map[string]dbus.Variant{}, int32(1000))
	if call.Err != nil {
		panic(call.Err)
	}
}

server.go

package main

import (
	"fmt"
	"github.com/guelfey/go.dbus"
)

type Server struct {
	id uint32
}

func (s Server) Notify(appName string, replacesId uint32, appIcon string, summary string, body string, actions []string, hints map[string]dbus.Variant, expireTimeout int32) (ret uint32, err *dbus.Error) {
	fmt.Printf("Got Notification from %s:\n", appName)
	fmt.Printf("==== %s ====\n", summary)
	fmt.Println(body)
	fmt.Printf("==== END %s ====\n", summary)
	s.id++
	return s.id, nil
}

func main() {
	conn, err := dbus.SessionBus()
	if err != nil {
		panic(err)
	}

	reply, err := conn.RequestName("org.freedesktop.Notifications", dbus.NameFlagDoNotQueue)
	if err != nil {
		panic(err)
	}
	if reply != dbus.RequestNameReplyPrimaryOwner {
		panic("Name already taken")
	}

	s := Server{ id: 0 }

	conn.Export(s, "/org/freedesktop/Notifications", "org.freedesktop.Notifications")
	select {}
}