85 lines
3.2 KiB
Go
85 lines
3.2 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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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 storage
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import (
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"fmt"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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)
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type ResourceEncodingConfig interface {
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// StorageEncoding returns the serialization format for the resource.
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// TODO this should actually return a GroupVersionKind since you can logically have multiple "matching" Kinds
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// For now, it returns just the GroupVersion for consistency with old behavior
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StorageEncodingFor(schema.GroupResource) (schema.GroupVersion, error)
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// InMemoryEncodingFor returns the groupVersion for the in memory representation the storage should convert to.
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InMemoryEncodingFor(schema.GroupResource) (schema.GroupVersion, error)
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}
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type DefaultResourceEncodingConfig struct {
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// resources records the overriding encoding configs for individual resources.
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resources map[schema.GroupResource]*OverridingResourceEncoding
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scheme *runtime.Scheme
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}
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type OverridingResourceEncoding struct {
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ExternalResourceEncoding schema.GroupVersion
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InternalResourceEncoding schema.GroupVersion
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}
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var _ ResourceEncodingConfig = &DefaultResourceEncodingConfig{}
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func NewDefaultResourceEncodingConfig(scheme *runtime.Scheme) *DefaultResourceEncodingConfig {
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return &DefaultResourceEncodingConfig{resources: map[schema.GroupResource]*OverridingResourceEncoding{}, scheme: scheme}
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}
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func (o *DefaultResourceEncodingConfig) SetResourceEncoding(resourceBeingStored schema.GroupResource, externalEncodingVersion, internalVersion schema.GroupVersion) {
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o.resources[resourceBeingStored] = &OverridingResourceEncoding{
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ExternalResourceEncoding: externalEncodingVersion,
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InternalResourceEncoding: internalVersion,
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}
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}
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func (o *DefaultResourceEncodingConfig) StorageEncodingFor(resource schema.GroupResource) (schema.GroupVersion, error) {
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if !o.scheme.IsGroupRegistered(resource.Group) {
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return schema.GroupVersion{}, fmt.Errorf("group %q is not registered in scheme", resource.Group)
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}
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resourceOverride, resourceExists := o.resources[resource]
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if resourceExists {
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return resourceOverride.ExternalResourceEncoding, nil
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}
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// return the most preferred external version for the group
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return o.scheme.PrioritizedVersionsForGroup(resource.Group)[0], nil
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}
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func (o *DefaultResourceEncodingConfig) InMemoryEncodingFor(resource schema.GroupResource) (schema.GroupVersion, error) {
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if !o.scheme.IsGroupRegistered(resource.Group) {
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return schema.GroupVersion{}, fmt.Errorf("group %q is not registered in scheme", resource.Group)
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}
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resourceOverride, resourceExists := o.resources[resource]
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if resourceExists {
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return resourceOverride.InternalResourceEncoding, nil
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}
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return schema.GroupVersion{Group: resource.Group, Version: runtime.APIVersionInternal}, nil
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}
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