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| 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 controllermap |
| 16 | + |
| 17 | +import ( |
| 18 | + "sync" |
| 19 | + |
| 20 | + "k8s.io/apimachinery/pkg/runtime/schema" |
| 21 | + "k8s.io/apimachinery/pkg/types" |
| 22 | + "sigs.k8s.io/controller-runtime/pkg/controller" |
| 23 | +) |
| 24 | + |
| 25 | +// ControllerMap - map of GVK to ControllerMapContents |
| 26 | +type ControllerMap struct { |
| 27 | + mutex sync.RWMutex |
| 28 | + internal map[schema.GroupVersionKind]*ControllerMapContents |
| 29 | +} |
| 30 | + |
| 31 | +// UIDMap - map of UID to namespaced name of owner |
| 32 | +type UIDMap struct { |
| 33 | + mutex sync.RWMutex |
| 34 | + internal map[types.UID]types.NamespacedName |
| 35 | +} |
| 36 | + |
| 37 | +// WatchMap - map of GVK to interface. Determines if resource is being watched already |
| 38 | +type WatchMap struct { |
| 39 | + mutex sync.RWMutex |
| 40 | + internal map[schema.GroupVersionKind]interface{} |
| 41 | +} |
| 42 | + |
| 43 | +// ControllerMapContents- Contains internal data associated with each controller |
| 44 | +type ControllerMapContents struct { |
| 45 | + Controller controller.Controller |
| 46 | + WatchDependentResources bool |
| 47 | + WatchClusterScopedResources bool |
| 48 | + WatchMap *WatchMap |
| 49 | + UIDMap *UIDMap |
| 50 | +} |
| 51 | + |
| 52 | +// NewControllerMap returns a new object that contains a mapping between GVK |
| 53 | +// and ControllerMapContents object |
| 54 | +func NewControllerMap() *ControllerMap { |
| 55 | + return &ControllerMap{ |
| 56 | + internal: make(map[schema.GroupVersionKind]*ControllerMapContents), |
| 57 | + } |
| 58 | +} |
| 59 | + |
| 60 | +// NewWatchMap - returns a new object that maps GVK to interface to determine |
| 61 | +// if resource is being watched |
| 62 | +func NewWatchMap() *WatchMap { |
| 63 | + return &WatchMap{ |
| 64 | + internal: make(map[schema.GroupVersionKind]interface{}), |
| 65 | + } |
| 66 | +} |
| 67 | + |
| 68 | +// NewUIDMap - returns a new object that maps UID to namespaced name of owner |
| 69 | +func NewUIDMap() *UIDMap { |
| 70 | + return &UIDMap{ |
| 71 | + internal: make(map[types.UID]types.NamespacedName), |
| 72 | + } |
| 73 | +} |
| 74 | + |
| 75 | +// Get - Returns a ControllerMapContents given a GVK as the key. `ok` |
| 76 | +// determines if the key exists |
| 77 | +func (cm *ControllerMap) Get(key schema.GroupVersionKind) (value *ControllerMapContents, ok bool) { |
| 78 | + cm.mutex.RLock() |
| 79 | + defer cm.mutex.RUnlock() |
| 80 | + value, ok = cm.internal[key] |
| 81 | + return value, ok |
| 82 | +} |
| 83 | + |
| 84 | +// Delete - Deletes associated GVK to controller mapping from the ControllerMap |
| 85 | +func (cm *ControllerMap) Delete(key schema.GroupVersionKind) { |
| 86 | + cm.mutex.Lock() |
| 87 | + defer cm.mutex.Unlock() |
| 88 | + delete(cm.internal, key) |
| 89 | +} |
| 90 | + |
| 91 | +// Store - Adds a new GVK to controller mapping |
| 92 | +func (cm *ControllerMap) Store(key schema.GroupVersionKind, value *ControllerMapContents) { |
| 93 | + cm.mutex.Lock() |
| 94 | + defer cm.mutex.Unlock() |
| 95 | + cm.internal[key] = value |
| 96 | +} |
| 97 | + |
| 98 | +// Get - Checks if GVK is already watched |
| 99 | +func (wm *WatchMap) Get(key schema.GroupVersionKind) (value interface{}, ok bool) { |
| 100 | + wm.mutex.RLock() |
| 101 | + defer wm.mutex.RUnlock() |
| 102 | + value, ok = wm.internal[key] |
| 103 | + return value, ok |
| 104 | +} |
| 105 | + |
| 106 | +// Delete - Deletes associated watches for a specific GVK |
| 107 | +func (wm *WatchMap) Delete(key schema.GroupVersionKind) { |
| 108 | + wm.mutex.Lock() |
| 109 | + defer wm.mutex.Unlock() |
| 110 | + delete(wm.internal, key) |
| 111 | +} |
| 112 | + |
| 113 | +// Store - Adds a new GVK to be watched |
| 114 | +func (wm *WatchMap) Store(key schema.GroupVersionKind) { |
| 115 | + wm.mutex.Lock() |
| 116 | + defer wm.mutex.Unlock() |
| 117 | + wm.internal[key] = nil |
| 118 | +} |
| 119 | + |
| 120 | +// Get - Returns a NamespacedName of the owner given a UID |
| 121 | +func (um *UIDMap) Get(key types.UID) (value types.NamespacedName, ok bool) { |
| 122 | + um.mutex.RLock() |
| 123 | + defer um.mutex.RUnlock() |
| 124 | + value, ok = um.internal[key] |
| 125 | + return value, ok |
| 126 | +} |
| 127 | + |
| 128 | +// Delete - Deletes associated UID to NamespacedName mapping |
| 129 | +func (um *UIDMap) Delete(key types.UID) { |
| 130 | + um.mutex.Lock() |
| 131 | + defer um.mutex.Unlock() |
| 132 | + delete(um.internal, key) |
| 133 | +} |
| 134 | + |
| 135 | +// Store - Adds a new UID to NamespacedName mapping |
| 136 | +func (um *UIDMap) Store(key types.UID, value types.NamespacedName) { |
| 137 | + um.mutex.Lock() |
| 138 | + defer um.mutex.Unlock() |
| 139 | + um.internal[key] = value |
| 140 | +} |
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