knative.dev/pkg@v0.0.0-20260602142205-ac97e43f6622/injection/ducks.go (about)

     1  /*
     2  Copyright 2019 The Knative Authors
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package injection
    18  
    19  import (
    20  	"context"
    21  )
    22  
    23  // DuckFactoryInjector holds the type of a callback that attaches a particular
    24  // duck-type informer factory to a context.
    25  type DuckFactoryInjector func(context.Context) context.Context
    26  
    27  func (i *impl) RegisterDuck(ii DuckFactoryInjector) {
    28  	i.m.Lock()
    29  	defer i.m.Unlock()
    30  
    31  	i.ducks = append(i.ducks, ii)
    32  }
    33  
    34  func (i *impl) GetDucks() []DuckFactoryInjector {
    35  	i.m.RLock()
    36  	defer i.m.RUnlock()
    37  
    38  	// Copy the slice before returning.
    39  	return append(i.ducks[:0:0], i.ducks...)
    40  }