| // 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 crdclient |
| |
| import ( |
| "istio.io/pkg/log" |
| "k8s.io/apimachinery/pkg/runtime" |
| "k8s.io/client-go/informers" |
| _ "k8s.io/client-go/plugin/pkg/client/auth/gcp" |
| _ "k8s.io/client-go/plugin/pkg/client/auth/oidc" |
| "k8s.io/client-go/tools/cache" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go-pixiu/pilot/pkg/model" |
| "github.com/apache/dubbo-go-pixiu/pkg/config" |
| "github.com/apache/dubbo-go-pixiu/pkg/config/schema/collection" |
| ) |
| |
| // cacheHandler abstracts the logic of an informer with a set of handlers. Handlers can be added at runtime |
| // and will be invoked on each informer event. |
| type cacheHandler struct { |
| client *Client |
| informer cache.SharedIndexInformer |
| schema collection.Schema |
| lister func(namespace string) cache.GenericNamespaceLister |
| } |
| |
| func (h *cacheHandler) onEvent(old interface{}, curr interface{}, event model.Event) error { |
| if err := h.client.checkReadyForEvents(curr); err != nil { |
| return err |
| } |
| |
| currItem, ok := curr.(runtime.Object) |
| if !ok { |
| scope.Warnf("New Object can not be converted to runtime Object %v, is type %T", curr, curr) |
| return nil |
| } |
| currConfig := TranslateObject(currItem, h.schema.Resource().GroupVersionKind(), h.client.domainSuffix) |
| |
| var oldConfig config.Config |
| if old != nil { |
| oldItem, ok := old.(runtime.Object) |
| if !ok { |
| log.Warnf("Old Object can not be converted to runtime Object %v, is type %T", old, old) |
| return nil |
| } |
| oldConfig = TranslateObject(oldItem, h.schema.Resource().GroupVersionKind(), h.client.domainSuffix) |
| } |
| |
| // TODO we may consider passing a pointer to handlers instead of the value. While spec is a pointer, the meta will be copied |
| for _, f := range h.client.handlers[h.schema.Resource().GroupVersionKind()] { |
| f(oldConfig, currConfig, event) |
| } |
| return nil |
| } |
| |
| func createCacheHandler(cl *Client, schema collection.Schema, i informers.GenericInformer) *cacheHandler { |
| scope.Debugf("registered CRD %v", schema.Resource().GroupVersionKind()) |
| h := &cacheHandler{ |
| client: cl, |
| schema: schema, |
| informer: i.Informer(), |
| } |
| h.lister = func(namespace string) cache.GenericNamespaceLister { |
| if schema.Resource().IsClusterScoped() { |
| return i.Lister() |
| } |
| return i.Lister().ByNamespace(namespace) |
| } |
| kind := schema.Resource().Kind() |
| i.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{ |
| AddFunc: func(obj interface{}) { |
| incrementEvent(kind, "add") |
| if !cl.beginSync.Load() { |
| return |
| } |
| cl.queue.Push(func() error { |
| return h.onEvent(nil, obj, model.EventAdd) |
| }) |
| }, |
| UpdateFunc: func(old, cur interface{}) { |
| incrementEvent(kind, "update") |
| if !cl.beginSync.Load() { |
| return |
| } |
| cl.queue.Push(func() error { |
| return h.onEvent(old, cur, model.EventUpdate) |
| }) |
| }, |
| DeleteFunc: func(obj interface{}) { |
| incrementEvent(kind, "delete") |
| if !cl.beginSync.Load() { |
| return |
| } |
| cl.queue.Push(func() error { |
| return h.onEvent(nil, obj, model.EventDelete) |
| }) |
| }, |
| }) |
| return h |
| } |