Add support for Namespace as Kind

Add example for using namespaces

pkg/registry/namespace/rest.go

@@ -0,0 +1,134 @@
+/*
+Copyright 2014 Google Inc. 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 namespace
+
+import (
+	"fmt"
+
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	kerrors "github.com/GoogleCloudPlatform/kubernetes/pkg/api/errors"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api/rest"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/api/validation"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/apiserver"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/registry/generic"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/watch"
+)
+
+// REST provides the RESTStorage access patterns to work with Namespace objects.
+type REST struct {
+	registry generic.Registry
+}
+
+// NewREST returns a new REST. You must use a registry created by
+// NewEtcdRegistry unless you're testing.
+func NewREST(registry generic.Registry) *REST {
+	return &REST{
+		registry: registry,
+	}
+}
+
+// Create creates a Namespace object
+func (rs *REST) Create(ctx api.Context, obj runtime.Object) (<-chan apiserver.RESTResult, error) {
+	namespace := obj.(*api.Namespace)
+	if err := rest.BeforeCreate(rest.Namespaces, ctx, obj); err != nil {
+		return nil, err
+	}
+	return apiserver.MakeAsync(func() (runtime.Object, error) {
+		if err := rs.registry.Create(ctx, namespace.Name, namespace); err != nil {
+			err = rest.CheckGeneratedNameError(rest.Namespaces, err, namespace)
+			return nil, err
+		}
+		return rs.registry.Get(ctx, namespace.Name)
+	}), nil
+}
+
+// Update updates a Namespace object.
+func (rs *REST) Update(ctx api.Context, obj runtime.Object) (<-chan apiserver.RESTResult, error) {
+	namespace, ok := obj.(*api.Namespace)
+	if !ok {
+		return nil, fmt.Errorf("not a namespace: %#v", obj)
+	}
+
+	oldObj, err := rs.registry.Get(ctx, namespace.Name)
+	if err != nil {
+		return nil, err
+	}
+
+	oldNamespace := oldObj.(*api.Namespace)
+	if errs := validation.ValidateNamespaceUpdate(oldNamespace, namespace); len(errs) > 0 {
+		return nil, kerrors.NewInvalid("namespace", namespace.Name, errs)
+	}
+
+	return apiserver.MakeAsync(func() (runtime.Object, error) {
+		err := rs.registry.Update(ctx, oldNamespace.Name, oldNamespace)
+		if err != nil {
+			return nil, err
+		}
+		return rs.registry.Get(ctx, oldNamespace.Name)
+	}), nil
+}
+
+// Delete deletes the Namespace with the specified name
+func (rs *REST) Delete(ctx api.Context, id string) (<-chan apiserver.RESTResult, error) {
+	obj, err := rs.registry.Get(ctx, id)
+	if err != nil {
+		return nil, err
+	}
+	_, ok := obj.(*api.Namespace)
+	if !ok {
+		return nil, fmt.Errorf("invalid object type")
+	}
+
+	return apiserver.MakeAsync(func() (runtime.Object, error) {
+		return &api.Status{Status: api.StatusSuccess}, rs.registry.Delete(ctx, id)
+	}), nil
+}
+
+func (rs *REST) Get(ctx api.Context, id string) (runtime.Object, error) {
+	obj, err := rs.registry.Get(ctx, id)
+	if err != nil {
+		return nil, err
+	}
+	namespace, ok := obj.(*api.Namespace)
+	if !ok {
+		return nil, fmt.Errorf("invalid object type")
+	}
+	return namespace, err
+}
+
+func (rs *REST) getAttrs(obj runtime.Object) (objLabels, objFields labels.Set, err error) {
+	return labels.Set{}, labels.Set{}, nil
+}
+
+func (rs *REST) List(ctx api.Context, label, field labels.Selector) (runtime.Object, error) {
+	return rs.registry.List(ctx, &generic.SelectionPredicate{label, field, rs.getAttrs})
+}
+
+func (rs *REST) Watch(ctx api.Context, label, field labels.Selector, resourceVersion string) (watch.Interface, error) {
+	return rs.registry.Watch(ctx, &generic.SelectionPredicate{label, field, rs.getAttrs}, resourceVersion)
+}
+
+// New returns a new api.Namespace
+func (*REST) New() runtime.Object {
+	return &api.Namespace{}
+}
+
+func (*REST) NewList() runtime.Object {
+	return &api.NamespaceList{}
+}