Refactor a bit.

memory/globalinfo.go

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-package memory
-
-import (
-        "golang.org/x/net/context"
-
-        "github.com/luci/gae"
-        "github.com/luci/gae/dummy"
-)
-
-type giContextKeyType int
-
-var giContextKey giContextKeyType
-
-func curGID(c context.Context) *globalInfoData {
-        return c.Value(giContextKey).(*globalInfoData)
-}
-
-// useGI adds a gae.GlobalInfo context, accessible
-// by gae.GetGI(c)
-func useGI(c context.Context) context.Context {
-        return gae.SetGIFactory(c, func(ic context.Context) gae.GlobalInfo {
-                return &giImpl{dummy.GI(), curGID(ic), ic}
-        })
-}
-
-// globalAppID is the 'AppID' of everythin returned from this memory
-// implementation (DSKeys, GlobalInfo, etc.). There's no way to modify this
-// value through the API, and there are a couple bits of code where it's hard to
-// route this value through to without making the internal APIs really complex.
-const globalAppID = "dev~app"
-
-type globalInfoData struct {
-        namespace string
-}
-
-type giImpl struct {
-        gae.GlobalInfo
-        *globalInfoData
-        c context.Context
-}
-
-var _ = gae.GlobalInfo((*giImpl)(nil))
-
-func (gi *giImpl) Namespace(ns string) (ret context.Context, err error) {
-        return context.WithValue(gi.c, giContextKey, &globalInfoData{ns}), nil
-}
-
-func (gi *giImpl) AppID() string {
-        return globalAppID
-}