github.com/jmrodri/operator-sdk@v0.5.0/pkg/predicate/predicate.go (about) 1 // Copyright 2018 The Operator-SDK Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package predicate 16 17 import ( 18 "sigs.k8s.io/controller-runtime/pkg/event" 19 "sigs.k8s.io/controller-runtime/pkg/predicate" 20 logf "sigs.k8s.io/controller-runtime/pkg/runtime/log" 21 ) 22 23 var log = logf.Log.WithName("predicate").WithName("eventFilters") 24 25 // GenerationChangedPredicate implements a default update predicate function on generation change 26 // (adapted from sigs.k8s.io/controller-runtime/pkg/predicate/predicate.ResourceVersionChangedPredicate) 27 type GenerationChangedPredicate struct { 28 predicate.Funcs 29 } 30 31 // Update implements default UpdateEvent filter for validating generation change 32 func (GenerationChangedPredicate) Update(e event.UpdateEvent) bool { 33 if e.MetaOld == nil { 34 log.Error(nil, "Update event has no old metadata", "event", e) 35 return false 36 } 37 if e.ObjectOld == nil { 38 log.Error(nil, "Update event has no old runtime object to update", "event", e) 39 return false 40 } 41 if e.ObjectNew == nil { 42 log.Error(nil, "Update event has no new runtime object for update", "event", e) 43 return false 44 } 45 if e.MetaNew == nil { 46 log.Error(nil, "Update event has no new metadata", "event", e) 47 return false 48 } 49 if e.MetaNew.GetGeneration() == e.MetaOld.GetGeneration() { 50 return false 51 } 52 return true 53 }