github.com/1aal/kubeblocks@v0.0.0-20231107070852-e1c03e598921/pkg/controller/handler/delegator_finder.go (about)

     1  /*
     2  Copyright (C) 2022-2023 ApeCloud Co., Ltd
     3  
     4  This file is part of KubeBlocks project
     5  
     6  This program is free software: you can redistribute it and/or modify
     7  it under the terms of the GNU Affero General Public License as published by
     8  the Free Software Foundation, either version 3 of the License, or
     9  (at your option) any later version.
    10  
    11  This program is distributed in the hope that it will be useful
    12  but WITHOUT ANY WARRANTY; without even the implied warranty of
    13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14  GNU Affero General Public License for more details.
    15  
    16  You should have received a copy of the GNU Affero General Public License
    17  along with this program.  If not, see <http://www.gnu.org/licenses/>.
    18  */
    19  
    20  package handler
    21  
    22  import (
    23  	"strings"
    24  
    25  	"k8s.io/apimachinery/pkg/runtime"
    26  	"sigs.k8s.io/controller-runtime/pkg/client"
    27  
    28  	"github.com/1aal/kubeblocks/pkg/controller/model"
    29  )
    30  
    31  type delegatorFinder struct {
    32  	baseFinder
    33  
    34  	// nameLabels defines labels should be contained in event source object.
    35  	// And these labels will be used to build the delegator object's name by concat in order by '-' separator.
    36  	nameLabels []string
    37  }
    38  
    39  var _ Finder = &delegatorFinder{}
    40  
    41  func NewDelegatorFinder(delegatorType runtime.Object, nameLabels []string) Finder {
    42  	return &delegatorFinder{
    43  		nameLabels: nameLabels,
    44  		baseFinder: baseFinder{
    45  			objectType: delegatorType,
    46  		},
    47  	}
    48  }
    49  
    50  func (finder *delegatorFinder) Find(ctx *FinderContext, object client.Object) *model.GVKNObjKey {
    51  	// make sure all labels in NameLabels exist and get the corresponding values in order.
    52  	labels := object.GetLabels()
    53  	if labels == nil {
    54  		return nil
    55  	}
    56  	var nameValues []string
    57  	for _, label := range finder.nameLabels {
    58  		if value, ok := labels[label]; !ok {
    59  			return nil
    60  		} else {
    61  			nameValues = append(nameValues, value)
    62  		}
    63  	}
    64  	// build the delegator object's name
    65  	name := strings.Join(nameValues, "-")
    66  	objKey := client.ObjectKey{
    67  		Namespace: object.GetNamespace(),
    68  		Name:      name,
    69  	}
    70  	delegatorGVK := finder.getGroupVersionKind(&ctx.Scheme)
    71  	if delegatorGVK == nil {
    72  		return nil
    73  	}
    74  	return &model.GVKNObjKey{
    75  		GroupVersionKind: *delegatorGVK,
    76  		ObjectKey:        objKey,
    77  	}
    78  }