/
mem.go
284 lines (233 loc) · 7.84 KB
/
mem.go
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package foo
import (
"context"
"fmt"
"sync"
"time"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/meta"
metainternalversion "k8s.io/apimachinery/pkg/apis/meta/internalversion"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
durationutil "k8s.io/apimachinery/pkg/util/duration"
genericapirequest "k8s.io/apiserver/pkg/endpoints/request"
"k8s.io/apiserver/pkg/registry/rest"
"k8s.io/apiserver/pkg/storage/names"
hellov1 "github.com/phosae/x-kubernetes/api/hello.zeng.dev/v1"
)
type fooApi struct {
sync.RWMutex
store map[string]*hellov1.Foo
}
func NewMemStore() *fooApi {
return &fooApi{
store: map[string]*hellov1.Foo{
"default/bar": {
// TypeMeta: metav1.TypeMeta{APIVersion: "hello.zeng.dev/v1", Kind: "Foo"},
ObjectMeta: metav1.ObjectMeta{Namespace: "default", Name: "bar", CreationTimestamp: metav1.Now()},
Spec: hellov1.FooSpec{
Msg: "hello world",
Msg1: "made in apiserver ontop k8s.io/apiserver library",
},
},
},
}
}
var _ rest.SingularNameProvider = &fooApi{}
var _ rest.Getter = &fooApi{}
var _ rest.Lister = &fooApi{}
var _ rest.CreaterUpdater = &fooApi{}
var _ rest.GracefulDeleter = &fooApi{}
var _ rest.CollectionDeleter = &fooApi{}
// var _ rest.StandardStorage = &fooApi{} // implements all interfaces of rest.StandardStorage except rest.Watcher
// GetSingularName implements rest.SingularNameProvider
func (*fooApi) GetSingularName() string {
return hellov1.Resource("foo").Resource
}
// Kind implements rest.KindProvider
func (*fooApi) Kind() string {
return "Foo"
}
// NamespaceScoped implements rest.Scoper
func (*fooApi) NamespaceScoped() bool {
return true
}
// New implements rest.Storage
func (*fooApi) New() runtime.Object {
return &hellov1.Foo{}
}
// Destroy implements rest.Storage
func (*fooApi) Destroy() {}
var simpleNameGenerator = names.SimpleNameGenerator
// Create implements rest.Creater
func (f *fooApi) Create(ctx context.Context, obj runtime.Object, createValidation rest.ValidateObjectFunc, options *metav1.CreateOptions) (runtime.Object, error) {
var name, namespace, key string
if objectMeta, err := meta.Accessor(obj); err != nil {
return nil, errors.NewInternalError(err)
} else {
rest.FillObjectMetaSystemFields(objectMeta)
if len(objectMeta.GetGenerateName()) > 0 && len(objectMeta.GetName()) == 0 {
objectMeta.SetName(simpleNameGenerator.GenerateName(objectMeta.GetGenerateName()))
}
name = objectMeta.GetName()
namespace = objectMeta.GetNamespace()
}
f.Lock()
defer f.Unlock()
key = fmt.Sprintf("%s/%s", namespace, name)
if _, ok := f.store[key]; ok {
return nil, errors.NewAlreadyExists(hellov1.Resource("foos"), key)
}
if createValidation != nil {
if err := createValidation(ctx, obj); err != nil {
return nil, errors.NewBadRequest(err.Error())
}
}
f.store[key] = obj.(*hellov1.Foo)
return obj, nil
}
// Update implements rest.Updater
func (f *fooApi) Update(ctx context.Context, name string, objInfo rest.UpdatedObjectInfo, createValidation rest.ValidateObjectFunc, updateValidation rest.ValidateObjectUpdateFunc, forceAllowCreate bool, options *metav1.UpdateOptions) (runtime.Object, bool, error) {
namespace := genericapirequest.NamespaceValue(ctx)
key := fmt.Sprintf("%s/%s", namespace, name)
var (
existingObj, creatingObj runtime.Object
creating = false
err error
)
f.Lock()
defer f.Unlock()
if existingObj = f.store[key]; existingObj.(*hellov1.Foo) == nil {
creating = true
creatingObj = f.New()
creatingObj, err = objInfo.UpdatedObject(ctx, creatingObj)
if err != nil {
return nil, false, errors.NewBadRequest(err.Error())
}
}
if creating {
creatingObj, err = f.Create(ctx, creatingObj, createValidation, nil)
if err != nil {
return nil, false, err
}
return creatingObj, true, nil
}
updated, err := objInfo.UpdatedObject(ctx, existingObj)
if err != nil {
return nil, false, errors.NewInternalError(err)
}
if updateValidation != nil {
if err = updateValidation(ctx, updated, existingObj); err != nil {
return nil, false, errors.NewBadRequest(err.Error())
}
}
f.store[key] = updated.(*hellov1.Foo)
return updated, false, nil
}
// Delete implements rest.GracefulDeleter
func (f *fooApi) Delete(ctx context.Context, name string, deleteValidation rest.ValidateObjectFunc, options *metav1.DeleteOptions) (runtime.Object, bool, error) {
namespace := genericapirequest.NamespaceValue(ctx)
key := fmt.Sprintf("%s/%s", namespace, name)
f.Lock()
defer f.Unlock()
if obj, ok := f.store[key]; !ok { // not exists
return nil, false, errors.NewNotFound(hellov1.Resource("foos"), key)
} else {
if deleteValidation != nil {
if err := deleteValidation(ctx, obj); err != nil {
return nil, false, errors.NewBadRequest(err.Error())
}
}
delete(f.store, key)
return obj, true, nil
}
}
// DeleteCollection implements rest.CollectionDeleter
func (f *fooApi) DeleteCollection(ctx context.Context, deleteValidation rest.ValidateObjectFunc, options *metav1.DeleteOptions, listOptions *metainternalversion.ListOptions) (runtime.Object, error) {
namespace := genericapirequest.NamespaceValue(ctx)
var flist hellov1.FooList
f.Lock()
defer f.Unlock()
for _, obj := range f.store {
if obj.Namespace == namespace {
flist.Items = append(flist.Items, *obj)
}
}
if deleteValidation != nil {
if err := deleteValidation(ctx, &flist); err != nil {
return nil, errors.NewBadRequest(err.Error())
}
}
for _, obj := range f.store {
if obj.Namespace == namespace {
delete(f.store, fmt.Sprintf("%s/%s", namespace, obj.Name))
}
}
return &flist, nil
}
// rest.Getter interface
func (f *fooApi) Get(ctx context.Context, name string, options *metav1.GetOptions) (runtime.Object, error) {
namespace := genericapirequest.NamespaceValue(ctx)
key := fmt.Sprintf("%s/%s", namespace, name)
f.RLock()
defer f.RUnlock()
if obj, ok := f.store[key]; !ok {
return nil, errors.NewNotFound(hellov1.Resource("foos"), key)
} else {
return obj, nil
}
}
// NewList implements rest.Lister
func (*fooApi) NewList() runtime.Object {
return &hellov1.FooList{}
}
// List implements rest.Lister
func (f *fooApi) List(ctx context.Context, options *metainternalversion.ListOptions) (runtime.Object, error) {
namespace := genericapirequest.NamespaceValue(ctx)
f.RLock()
defer f.RUnlock()
var flist hellov1.FooList
for _, obj := range f.store {
if namespace == "" {
flist.Items = append(flist.Items, *obj)
} else {
if obj.Namespace == namespace {
flist.Items = append(flist.Items, *obj)
}
}
}
return &flist, nil
}
// ConvertToTable implements rest.Lister
func (*fooApi) ConvertToTable(ctx context.Context, object runtime.Object, tableOptions runtime.Object) (*metav1.Table, error) {
var table metav1.Table
table.ColumnDefinitions = []metav1.TableColumnDefinition{
{Name: "Name", Type: "string", Format: "name", Description: metav1.ObjectMeta{}.SwaggerDoc()["name"]},
{Name: "Age", Type: "string", Description: metav1.ObjectMeta{}.SwaggerDoc()["creationTimestamp"]},
{Name: "Message", Type: "string", Format: "message", Description: "foo message"},
{Name: "Message1", Type: "string", Format: "message1", Description: "foo message plus"},
}
switch t := object.(type) {
case *hellov1.Foo:
table.ResourceVersion = t.ResourceVersion
addFoosToTable(&table, *t)
case *hellov1.FooList:
table.ResourceVersion = t.ResourceVersion
table.Continue = t.Continue
addFoosToTable(&table, t.Items...)
default:
}
return &table, nil
}
func addFoosToTable(table *metav1.Table, foos ...hellov1.Foo) {
for _, foo := range foos {
ts := "<unknown>"
if timestamp := foo.CreationTimestamp; !timestamp.IsZero() {
ts = durationutil.HumanDuration(time.Since(timestamp.Time))
}
table.Rows = append(table.Rows, metav1.TableRow{
Cells: []interface{}{foo.Name, ts, foo.Spec.Msg, foo.Spec.Msg1},
Object: runtime.RawExtension{Object: &foo},
})
}
}