mirror of https://github.com/k3s-io/k3s
66 lines
1.7 KiB
Go
66 lines
1.7 KiB
Go
|
/*
|
||
|
|
Copyright 2017 The Kubernetes Authors.
|
||
|
|
|
||
|
|
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 openapi
|
||
|
|
|
||
|
|
import (
|
||
|
|
"sync"
|
||
|
|
|
||
|
|
"k8s.io/client-go/discovery"
|
||
|
|
)
|
||
|
|
|
||
|
|
// synchronizedOpenAPIGetter fetches the openapi schema once and then caches it in memory
|
||
|
|
type synchronizedOpenAPIGetter struct {
|
||
|
|
// Cached results
|
||
|
|
sync.Once
|
||
|
|
openAPISchema Resources
|
||
|
|
err error
|
||
|
|
|
||
|
|
openAPIClient discovery.OpenAPISchemaInterface
|
||
|
|
}
|
||
|
|
|
||
|
|
var _ Getter = &synchronizedOpenAPIGetter{}
|
||
|
|
|
||
|
|
// Getter is an interface for fetching openapi specs and parsing them into an Resources struct
|
||
|
|
type Getter interface {
|
||
|
|
// OpenAPIData returns the parsed OpenAPIData
|
||
|
|
Get() (Resources, error)
|
||
|
|
}
|
||
|
|
|
||
|
|
// NewOpenAPIGetter returns an object to return OpenAPIDatas which reads
|
||
|
|
// from a server, and then stores in memory for subsequent invocations
|
||
|
|
func NewOpenAPIGetter(openAPIClient discovery.OpenAPISchemaInterface) Getter {
|
||
|
|
return &synchronizedOpenAPIGetter{
|
||
|
|
openAPIClient: openAPIClient,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Resources implements Getter
|
||
|
|
func (g *synchronizedOpenAPIGetter) Get() (Resources, error) {
|
||
|
|
g.Do(func() {
|
||
|
|
s, err := g.openAPIClient.OpenAPISchema()
|
||
|
|
if err != nil {
|
||
|
|
g.err = err
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
g.openAPISchema, g.err = NewOpenAPIData(s)
|
||
|
|
})
|
||
|
|
|
||
|
|
// Return the save result
|
||
|
|
return g.openAPISchema, g.err
|
||
|
|
}
|