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client.go
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/
client.go
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package multi
import (
"context"
"fmt"
"github.com/acorn-io/baaah/pkg/uncached"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/watch"
kclient "sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/client/apiutil"
)
func NewClientNotFoundError(group string) error {
return &ClientNotFoundError{group: group}
}
type ClientNotFoundError struct {
group string
}
func (c *ClientNotFoundError) Error() string {
return fmt.Sprintf("client for group %s not found", c.group)
}
type multiClient struct {
defaultClient kclient.WithWatch
clients map[string]kclient.WithWatch
}
type clientWithFakeWatch struct {
kclient.Client
}
func (c *clientWithFakeWatch) Watch(context.Context, kclient.ObjectList, ...kclient.ListOption) (watch.Interface, error) {
return watch.NewFake(), nil
}
// NewClient returns a client that will use the client for the API groups it knows about.
// The default client is used for any unspecified API groups. If a client cannot be found, and a default doesn't exist,
// then every method will return a ClientNotFound error.
// Note that defaultClient's scheme should be valid for all clients.
func NewClient(defaultClient kclient.Client, clients map[string]kclient.Client) kclient.Client {
fakeWatchClients := make(map[string]kclient.WithWatch, len(clients))
for group, c := range clients {
fakeWatchClients[group] = &clientWithFakeWatch{c}
}
return NewWithWatch(&clientWithFakeWatch{defaultClient}, fakeWatchClients)
}
// NewWithWatch returns a client WithWatch that will use the client for the API groups it knows about.
// The default client is used for any unspecified API groups. If a client cannot be found, and a default doesn't exist,
// then every method will return a ClientNotFound error.
// Note that defaultClient's scheme should be valid for all clients.
func NewWithWatch(defaultClient kclient.WithWatch, clients map[string]kclient.WithWatch) kclient.WithWatch {
return &multiClient{
defaultClient: defaultClient,
clients: clients,
}
}
func (m multiClient) Get(ctx context.Context, key kclient.ObjectKey, obj kclient.Object, opts ...kclient.GetOption) error {
c, err := m.getClient(obj)
if err != nil {
return err
}
return c.Get(ctx, key, obj, opts...)
}
func (m multiClient) List(ctx context.Context, list kclient.ObjectList, opts ...kclient.ListOption) error {
c, err := m.getClient(list)
if err != nil {
return err
}
return c.List(ctx, list, opts...)
}
func (m multiClient) Create(ctx context.Context, obj kclient.Object, opts ...kclient.CreateOption) error {
c, err := m.getClient(obj)
if err != nil {
return err
}
return c.Create(ctx, obj, opts...)
}
func (m multiClient) Delete(ctx context.Context, obj kclient.Object, opts ...kclient.DeleteOption) error {
c, err := m.getClient(obj)
if err != nil {
return err
}
return c.Delete(ctx, obj, opts...)
}
func (m multiClient) Update(ctx context.Context, obj kclient.Object, opts ...kclient.UpdateOption) error {
c, err := m.getClient(obj)
if err != nil {
return err
}
return c.Update(ctx, obj, opts...)
}
func (m multiClient) Patch(ctx context.Context, obj kclient.Object, patch kclient.Patch, opts ...kclient.PatchOption) error {
c, err := m.getClient(obj)
if err != nil {
return err
}
return c.Patch(ctx, obj, patch, opts...)
}
func (m multiClient) DeleteAllOf(ctx context.Context, obj kclient.Object, opts ...kclient.DeleteAllOfOption) error {
c, err := m.getClient(obj)
if err != nil {
return err
}
return c.DeleteAllOf(ctx, obj, opts...)
}
func (m multiClient) Status() kclient.SubResourceWriter {
return statusMultiClient{m}
}
func (m multiClient) SubResource(subResource string) kclient.SubResourceClient {
return subResourceMultiClient{m, subResource}
}
func (m multiClient) Scheme() *runtime.Scheme {
return m.defaultClient.Scheme()
}
func (m multiClient) RESTMapper() meta.RESTMapper {
return multiRestMapper{m}
}
func (m multiClient) GroupVersionKindFor(obj runtime.Object) (schema.GroupVersionKind, error) {
return apiutil.GVKForObject(obj, m.defaultClient.Scheme())
}
func (m multiClient) IsObjectNamespaced(obj runtime.Object) (bool, error) {
c, err := m.getClient(obj)
if err != nil {
return false, err
}
return c.IsObjectNamespaced(obj)
}
func (m multiClient) Watch(ctx context.Context, obj kclient.ObjectList, opts ...kclient.ListOption) (watch.Interface, error) {
c, err := m.getClient(obj)
if err != nil {
return nil, err
}
return c.Watch(ctx, obj, opts...)
}
func (m multiClient) getClient(obj runtime.Object) (kclient.WithWatch, error) {
gvk, err := m.GroupVersionKindFor(uncached.Unwrap(obj))
if err != nil {
return nil, err
}
return m.getClientForGroup(gvk.Group)
}
func (m multiClient) getClientForGroup(group string) (kclient.WithWatch, error) {
if c, ok := m.clients[group]; ok {
return c, nil
} else if m.defaultClient != nil {
return m.defaultClient, nil
}
return nil, NewClientNotFoundError(group)
}