Move etcd storage to pkg/storage/etcd

pkg/storage/etcd/api_object_versioner.go

@@ -0,0 +1,78 @@
+/*
+Copyright 2014 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package etcd
+
+import (
+	"strconv"
+	"time"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/storage"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
+)
+
+// APIObjectVersioner implements versioning and extracting etcd node information
+// for objects that have an embedded ObjectMeta or ListMeta field.
+type APIObjectVersioner struct{}
+
+// UpdateObject implements Versioner
+func (a APIObjectVersioner) UpdateObject(obj runtime.Object, expiration *time.Time, resourceVersion uint64) error {
+	objectMeta, err := api.ObjectMetaFor(obj)
+	if err != nil {
+		return err
+	}
+	if expiration != nil {
+		objectMeta.DeletionTimestamp = &util.Time{*expiration}
+	}
+	versionString := ""
+	if resourceVersion != 0 {
+		versionString = strconv.FormatUint(resourceVersion, 10)
+	}
+	objectMeta.ResourceVersion = versionString
+	return nil
+}
+
+// UpdateList implements Versioner
+func (a APIObjectVersioner) UpdateList(obj runtime.Object, resourceVersion uint64) error {
+	listMeta, err := api.ListMetaFor(obj)
+	if err != nil || listMeta == nil {
+		return err
+	}
+	versionString := ""
+	if resourceVersion != 0 {
+		versionString = strconv.FormatUint(resourceVersion, 10)
+	}
+	listMeta.ResourceVersion = versionString
+	return nil
+}
+
+// ObjectResourceVersion implements Versioner
+func (a APIObjectVersioner) ObjectResourceVersion(obj runtime.Object) (uint64, error) {
+	meta, err := api.ObjectMetaFor(obj)
+	if err != nil {
+		return 0, err
+	}
+	version := meta.ResourceVersion
+	if len(version) == 0 {
+		return 0, nil
+	}
+	return strconv.ParseUint(version, 10, 64)
+}
+
+// APIObjectVersioner implements Versioner
+var _ storage.Versioner = APIObjectVersioner{}