mirror of https://github.com/k3s-io/k3s
69 lines
2.1 KiB
Go
69 lines
2.1 KiB
Go
/*
|
|
Copyright 2014 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 admission
|
|
|
|
// chainAdmissionHandler is an instance of admission.NamedHandler that performs admission control using
|
|
// a chain of admission handlers
|
|
type chainAdmissionHandler []Interface
|
|
|
|
// NewChainHandler creates a new chain handler from an array of handlers. Used for testing.
|
|
func NewChainHandler(handlers ...Interface) chainAdmissionHandler {
|
|
return chainAdmissionHandler(handlers)
|
|
}
|
|
|
|
// Admit performs an admission control check using a chain of handlers, and returns immediately on first error
|
|
func (admissionHandler chainAdmissionHandler) Admit(a Attributes, o ObjectInterfaces) error {
|
|
for _, handler := range admissionHandler {
|
|
if !handler.Handles(a.GetOperation()) {
|
|
continue
|
|
}
|
|
if mutator, ok := handler.(MutationInterface); ok {
|
|
err := mutator.Admit(a, o)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Validate performs an admission control check using a chain of handlers, and returns immediately on first error
|
|
func (admissionHandler chainAdmissionHandler) Validate(a Attributes, o ObjectInterfaces) error {
|
|
for _, handler := range admissionHandler {
|
|
if !handler.Handles(a.GetOperation()) {
|
|
continue
|
|
}
|
|
if validator, ok := handler.(ValidationInterface); ok {
|
|
err := validator.Validate(a, o)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Handles will return true if any of the handlers handles the given operation
|
|
func (admissionHandler chainAdmissionHandler) Handles(operation Operation) bool {
|
|
for _, handler := range admissionHandler {
|
|
if handler.Handles(operation) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|