Add wrappers for the module module

impl/memory/module.go

+// Copyright 2016 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 (
+        "github.com/luci/gae/service/module"
+        "golang.org/x/net/context"
+)
+
+type modContextKeyType int
+
+var modContextKey modContextKeyType
+
+type modImpl struct {
+        c context.Context
+}
+
+// useMod adds a Module interface to the context
+func useMod(c context.Context) context.Context {
+        return module.SetFactory(c, func(ic context.Context) module.Interface {
+                return &modImpl{ic}
+        })
+}
+
+var _ = module.Interface((*modImpl)(nil))
+
+func (mod *modImpl) List() ([]string, error) {
+        return []string{"testModule1", "testModule2"}, nil
+}
+
+func (mod *modImpl) NumInstances(module, version string) (int, error) {
+        return 1, nil
+}
+
+func (mod *modImpl) SetNumInstances(module, version string, instances int) error {
+        return nil
+}

[iannucci1, 2016/03/08 07:44:26]

this should probably change the number of instances returned by NumInstances at
least

[dsansome, 2016/03/08 10:55:36]

Done.

+
+func (mod *modImpl) Versions(module string) ([]string, error) {
+        return []string{"testVersion1", "testVersion2"}, nil
+}
+
+func (mod *modImpl) DefaultVersion(module string) (string, error) {
+        return "testVersion1", nil
+}
+
+func (mod *modImpl) Start(module, version string) error {
+        return nil
+}
+
+func (mod *modImpl) Stop(module, version string) error {
+        return nil
+}

[iannucci1, 2016/03/08 07:44:26]

I guess we'll expand this implementation as needed?

[dsansome, 2016/03/08 10:55:36]

Sure!