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mapper.go
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/
mapper.go
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// Copyright 2019 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 worker
import (
"context"
"time"
machinev1alpha1 "github.com/gardener/machine-controller-manager/pkg/apis/machine/v1alpha1"
"github.com/go-logr/logr"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/predicate"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
"sigs.k8s.io/controller-runtime/pkg/runtime/inject"
extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
"github.com/gardener/gardener/pkg/controllerutils/mapper"
predicateutils "github.com/gardener/gardener/pkg/controllerutils/predicate"
)
// ClusterToWorkerMapper returns a mapper that returns requests for Worker whose
// referenced clusters have been modified.
func ClusterToWorkerMapper(predicates []predicate.Predicate) mapper.Mapper {
return mapper.ClusterToObjectMapper(func() client.ObjectList { return &extensionsv1alpha1.WorkerList{} }, predicates)
}
// MachineSetToWorkerMapper returns a mapper that returns requests for Worker whose
// referenced MachineSets have been modified.
func MachineSetToWorkerMapper(predicates []predicate.Predicate) mapper.Mapper {
return newMachineSetToObjectMapper(func() client.ObjectList { return &extensionsv1alpha1.WorkerList{} }, predicates)
}
// MachineToWorkerMapper returns a mapper that returns requests for Worker whose
// referenced Machines have been modified.
func MachineToWorkerMapper(predicates []predicate.Predicate) mapper.Mapper {
return newMachineToObjectMapper(func() client.ObjectList { return &extensionsv1alpha1.WorkerList{} }, predicates)
}
type machineSetToObjectMapper struct {
newObjListFunc func() client.ObjectList
predicates []predicate.Predicate
}
func (m *machineSetToObjectMapper) Map(ctx context.Context, _ logr.Logger, reader client.Reader, obj client.Object) []reconcile.Request {
machineSet, ok := obj.(*machinev1alpha1.MachineSet)
if !ok {
return nil
}
objList := m.newObjListFunc()
if err := reader.List(ctx, objList, client.InNamespace(machineSet.Namespace)); err != nil {
return nil
}
return mapper.ObjectListToRequests(objList, func(o client.Object) bool {
return predicateutils.EvalGeneric(o, m.predicates...)
})
}
// newMachineSetToObjectMapper returns a mapper that returns requests for objects whose
// referenced MachineSets have been modified.
func newMachineSetToObjectMapper(newObjListFunc func() client.ObjectList, predicates []predicate.Predicate) mapper.Mapper {
return &machineSetToObjectMapper{newObjListFunc: newObjListFunc, predicates: predicates}
}
type machineToObjectMapper struct {
newObjListFunc func() client.ObjectList
predicates []predicate.Predicate
}
func (m *machineToObjectMapper) InjectFunc(f inject.Func) error {
for _, p := range m.predicates {
if err := f(p); err != nil {
return err
}
}
return nil
}
func (m *machineToObjectMapper) Map(ctx context.Context, _ logr.Logger, reader client.Reader, obj client.Object) []reconcile.Request {
ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
defer cancel()
machine, ok := obj.(*machinev1alpha1.Machine)
if !ok {
return nil
}
objList := m.newObjListFunc()
if err := reader.List(ctx, objList, client.InNamespace(machine.Namespace)); err != nil {
return nil
}
return mapper.ObjectListToRequests(objList, func(o client.Object) bool {
return predicateutils.EvalGeneric(o, m.predicates...)
})
}
// newMachineToObjectMapper returns a mapper that returns requests for objects whose
// referenced Machines have been modified.
func newMachineToObjectMapper(newObjListFunc func() client.ObjectList, predicates []predicate.Predicate) mapper.Mapper {
return &machineToObjectMapper{newObjListFunc: newObjListFunc, predicates: predicates}
}