conversion.go

Documentation: k8s.io/kubernetes/pkg/apis/flowcontrol/v1beta3

     1  /*
     2  Copyright 2023 The Kubernetes 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 v1beta3
    18  
    19  import (
    20  	"k8s.io/api/flowcontrol/v1beta3"
    21  	"k8s.io/apimachinery/pkg/conversion"
    22  	"k8s.io/kubernetes/pkg/apis/flowcontrol"
    23  )
    24  
    25  func Convert_v1beta3_PriorityLevelConfiguration_To_flowcontrol_PriorityLevelConfiguration(in *v1beta3.PriorityLevelConfiguration, out *flowcontrol.PriorityLevelConfiguration, s conversion.Scope) error {
    26  	if err := autoConvert_v1beta3_PriorityLevelConfiguration_To_flowcontrol_PriorityLevelConfiguration(in, out, nil); err != nil {
    27  		return err
    28  	}
    29  
    30  	// during v1beta3 -> internal conversion:
    31  	//  - remove the roundtrip annotation for the 'NominalConcurrencyShares' field
    32  	//  - make sure we don't mutate the source (v1beta3) object's annotations
    33  	annotations, copied := dropPriorityLevelConcurrencyShareDefaultAnnotation(out.ObjectMeta.Annotations)
    34  	if copied {
    35  		out.ObjectMeta.Annotations = annotations
    36  	}
    37  	return nil
    38  }
    39  
    40  func Convert_flowcontrol_PriorityLevelConfiguration_To_v1beta3_PriorityLevelConfiguration(in *flowcontrol.PriorityLevelConfiguration, out *v1beta3.PriorityLevelConfiguration, s conversion.Scope) error {
    41  	if err := autoConvert_flowcontrol_PriorityLevelConfiguration_To_v1beta3_PriorityLevelConfiguration(in, out, nil); err != nil {
    42  		return err
    43  	}
    44  
    45  	// during internal -> v1beta3 conversion:
    46  	//  - add the roundtrip annotation for the 'NominalConcurrencyShares' field,
    47  	//      IIF the 'NominalConcurrencyShares' field has a value of zero.
    48  	//  - make sure we don't mutate the source (internal) object's annotations
    49  	if limited := in.Spec.Limited; limited != nil && limited.NominalConcurrencyShares == 0 {
    50  		annotations, copied := addPriorityLevelConcurrencyShareDefaultAnnotation(out.ObjectMeta.Annotations)
    51  		if copied {
    52  			out.ObjectMeta.Annotations = annotations
    53  		}
    54  	}
    55  
    56  	return nil
    57  }
    58  
    59  func dropPriorityLevelConcurrencyShareDefaultAnnotation(in map[string]string) (map[string]string, bool) {
    60  	if _, ok := in[v1beta3.PriorityLevelPreserveZeroConcurrencySharesKey]; !ok {
    61  		return in, false
    62  	}
    63  
    64  	out := copyStringMap(in)
    65  	delete(out, v1beta3.PriorityLevelPreserveZeroConcurrencySharesKey)
    66  	return out, true
    67  }
    68  
    69  func addPriorityLevelConcurrencyShareDefaultAnnotation(in map[string]string) (map[string]string, bool) {
    70  	if _, ok := in[v1beta3.PriorityLevelPreserveZeroConcurrencySharesKey]; ok {
    71  		return in, false
    72  	}
    73  
    74  	out := copyStringMap(in)
    75  	out[v1beta3.PriorityLevelPreserveZeroConcurrencySharesKey] = ""
    76  	return out, true
    77  }
    78  
    79  // copyStringMap returns a copy of the input map.
    80  // If input is nil, an empty map is returned.
    81  func copyStringMap(in map[string]string) map[string]string {
    82  	out := make(map[string]string, len(in))
    83  	for k, v := range in {
    84  		out[k] = v
    85  	}
    86  	return out
    87  }
    88
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