Initial public commit of mgmt

This is a prototype that i'm attempting to "release early". Expect a lot
of changes! It is intended to be a config management tool that will:

* be event based
* execute actions in parallel
* function as a distributed system

There are a bunch more design ideas going into this, please stay tuned!

types.go

@@ -0,0 +1,73 @@
+// Mgmt
+// Copyright (C) 2013-2015+ James Shubin and the project contributors
+// Written by James Shubin <james@shubin.ca> and the project contributors
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package main
+
+import (
+	"code.google.com/p/go-uuid/uuid"
+	"fmt"
+	"log"
+)
+
+type Type interface {
+	//Name()  string
+	Watch(*Vertex)
+	StateOK() bool // TODO: can we rename this to something better?
+	Apply() bool
+	Exit() bool
+}
+
+type NoopType struct {
+	uuid   string
+	Type   string      // always "noop"
+	Name   string      // name variable
+	Events chan string // FIXME: eventually a struct for the event?
+}
+
+func NewNoopType(name string) *NoopType {
+	return &NoopType{
+		uuid:   uuid.New(),
+		Type:   "noop",
+		Name:   name,
+		Events: make(chan string, 1), // XXX: chan size?
+	}
+}
+
+func (obj NoopType) Watch(v *Vertex) {
+	select {
+	case exit := <-obj.Events:
+		if exit == "exit" {
+			return
+		} else {
+			log.Fatal("Unknown event: %v\n", exit)
+		}
+	}
+}
+
+func (obj NoopType) Exit() bool {
+	obj.Events <- "exit"
+	return true
+}
+
+func (obj NoopType) StateOK() bool {
+	return true // never needs updating
+}
+
+func (obj NoopType) Apply() bool {
+	fmt.Printf("Apply->%v[%v]\n", obj.Type, obj.Name)
+	return true
+}