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09cfa364c5
Get should use ResourceMapper, allow Printer to be abstracted, and extract Describe as *Describer types.
102 lines
3.4 KiB
Go
102 lines
3.4 KiB
Go
/*
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Copyright 2014 Google Inc. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package kubectl
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import (
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api/meta"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
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"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
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)
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// RESTHelper provides methods for retrieving or mutating a RESTful
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// resource.
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type RESTHelper struct {
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Resource string
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// A RESTClient capable of mutating this resource
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RESTClient RESTClient
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// A codec for decoding and encoding objects of this resource type.
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Codec runtime.Codec
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// An interface for reading or writing the resource version of this
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// type.
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Versioner runtime.ResourceVersioner
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}
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// NewRESTHelper creates a RESTHelper from a ResourceMapping
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func NewRESTHelper(client RESTClient, mapping *meta.RESTMapping) *RESTHelper {
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return &RESTHelper{
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RESTClient: client,
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Resource: mapping.Resource,
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Codec: mapping.Codec,
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Versioner: mapping.MetadataAccessor,
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}
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}
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func (m *RESTHelper) Get(namespace, name string, selector labels.Selector) (runtime.Object, error) {
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return m.RESTClient.Get().Path(m.Resource).Namespace(namespace).Path(name).SelectorParam("labels", selector).Do().Get()
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}
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func (m *RESTHelper) Delete(namespace, name string) error {
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return m.RESTClient.Delete().Path(m.Resource).Namespace(namespace).Path(name).Do().Error()
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}
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func (m *RESTHelper) Create(namespace string, data []byte) error {
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return m.RESTClient.Post().Path(m.Resource).Namespace(namespace).Body(data).Do().Error()
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}
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func (m *RESTHelper) Update(namespace, name string, overwrite bool, data []byte) error {
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c := m.RESTClient
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obj, err := m.Codec.Decode(data)
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if err != nil {
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// We don't know how to handle this object, but update it anyway
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return updateResource(c, m.Resource, namespace, name, data)
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}
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// Attempt to version the object based on client logic.
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version, err := m.Versioner.ResourceVersion(obj)
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if err != nil {
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// We don't know how to version this object, so send it to the server as is
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return updateResource(c, m.Resource, namespace, name, data)
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}
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if version == "" && overwrite {
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// Retrieve the current version of the object to overwrite the server object
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serverObj, err := c.Get().Path(m.Resource).Path(name).Do().Get()
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if err != nil {
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// The object does not exist, but we want it to be created
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return updateResource(c, m.Resource, namespace, name, data)
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}
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serverVersion, err := m.Versioner.ResourceVersion(serverObj)
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if err != nil {
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return err
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}
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if err := m.Versioner.SetResourceVersion(obj, serverVersion); err != nil {
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return err
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}
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newData, err := m.Codec.Encode(obj)
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if err != nil {
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return err
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}
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data = newData
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}
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return updateResource(c, m.Resource, namespace, name, data)
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}
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func updateResource(c RESTClient, resourcePath, namespace, name string, data []byte) error {
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return c.Put().Path(resourcePath).Namespace(namespace).Path(name).Body(data).Do().Error()
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}
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