| // Copyright Istio 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 kstatus |
| |
| import ( |
| "reflect" |
| ) |
| |
| import ( |
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go-pixiu/pkg/config" |
| ) |
| |
| const ( |
| StatusTrue = "True" |
| StatusFalse = "False" |
| ) |
| |
| // InvertStatus returns the opposite of the provided status. If an invalid status is passed in, False is returned |
| func InvertStatus(status metav1.ConditionStatus) metav1.ConditionStatus { |
| switch status { |
| case StatusFalse: |
| return StatusTrue |
| default: |
| return StatusFalse |
| } |
| } |
| |
| // WrappedStatus provides a wrapper around a status message that keeps track of whether or not any |
| // changes have been made. This allows users to declarative write status, without worrying about |
| // tracking changes. When read to commit (typically to Kubernetes), any messages with Dirty=false can |
| // be discarded. |
| type WrappedStatus struct { |
| // Status is the object that is wrapped. |
| config.Status |
| // Dirty indicates if this object has been modified at all. |
| // Note: only changes wrapped in Mutate are tracked. |
| Dirty bool |
| } |
| |
| func Wrap(s config.Status) *WrappedStatus { |
| return &WrappedStatus{config.DeepCopy(s), false} |
| } |
| |
| func (w *WrappedStatus) Mutate(f func(s config.Status) config.Status) { |
| if w.Status == nil { |
| return |
| } |
| old := config.DeepCopy(w.Status) |
| w.Status = f(w.Status) |
| // TODO: change this to be more efficient. Likely we allow modifications via WrappedStatus that |
| // modify specific things (ie conditions). |
| if !reflect.DeepEqual(old, w.Status) { |
| w.Dirty = true |
| } |
| } |
| |
| func (w *WrappedStatus) Unwrap() config.Status { |
| return w.Status |
| } |
| |
| var EmptyCondition = metav1.Condition{} |
| |
| func GetCondition(conditions []metav1.Condition, condition string) metav1.Condition { |
| for _, cond := range conditions { |
| if cond.Type == condition { |
| return cond |
| } |
| } |
| return EmptyCondition |
| } |
| |
| // UpdateConditionIfChanged updates a condition if it has been changed. |
| func UpdateConditionIfChanged(conditions []metav1.Condition, condition metav1.Condition) []metav1.Condition { |
| ret := append([]metav1.Condition(nil), conditions...) |
| idx := -1 |
| for i, cond := range ret { |
| if cond.Type == condition.Type { |
| idx = i |
| break |
| } |
| } |
| |
| if idx == -1 { |
| ret = append(ret, condition) |
| return ret |
| } |
| if ret[idx].Message == condition.Message && |
| ret[idx].ObservedGeneration == condition.ObservedGeneration && |
| ret[idx].Status == condition.Status { |
| // Skip update, no changes |
| return conditions |
| } |
| ret[idx] = condition |
| |
| return ret |
| } |
| |
| // CreateCondition sets a condition only if it has not already been set |
| func CreateCondition(conditions []metav1.Condition, condition metav1.Condition, unsetReason string) []metav1.Condition { |
| ret := append([]metav1.Condition(nil), conditions...) |
| idx := -1 |
| for i, cond := range ret { |
| if cond.Type == condition.Type { |
| idx = i |
| if cond.Reason == unsetReason { |
| // Condition is set, but its for unsetReason. This is needed because some conditions have defaults |
| ret[idx] = condition |
| return ret |
| } |
| break |
| } |
| } |
| |
| if idx == -1 { |
| // Not found! We should set it |
| ret = append(ret, condition) |
| } |
| return ret |
| } |