loadbalancer_service_patcher.go

/*
Copyright 2023 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 openstack

import (
	"context"
	"reflect"

	corev1 "k8s.io/api/core/v1"
	utilerrors "k8s.io/apimachinery/pkg/util/errors"
	"k8s.io/client-go/kubernetes"
	cpoutil "k8s.io/cloud-provider-openstack/pkg/util"
)

type servicePatcher struct {
	kclient kubernetes.Interface
	base    *corev1.Service
	updated *corev1.Service
}

func newServicePatcher(kclient kubernetes.Interface, base *corev1.Service) servicePatcher {
	return servicePatcher{
		kclient: kclient,
		base:    base.DeepCopy(),
		updated: base,
	}
}

// Patch will submit a patch request for the Service unless the updated service
// reference contains the same set of annotations as the base copied during
// servicePatcher initialization.
func (sp *servicePatcher) Patch(ctx context.Context, err error) error {
	if reflect.DeepEqual(sp.base.Annotations, sp.updated.Annotations) {
		return err
	}
	perr := cpoutil.PatchService(ctx, sp.kclient, sp.base, sp.updated)
	return utilerrors.NewAggregate([]error{err, perr})
}