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package manager
import (
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/watch"
"k8s.io/klog/v2"
"github.com/kubeedge/kubeedge/pkg/metaserver/util"
)
// Manager define the interface of a Manager, configmapManager and podManager implement it
type Manager interface {
Events() chan watch.Event
}
// CommonResourceEventHandler can be used by configmapManager and podManager
type CommonResourceEventHandler struct {
events chan watch.Event
eventFilter EventFilter
}
func (c *CommonResourceEventHandler) obj2Event(t watch.EventType, obj interface{}) {
eventObj, ok := obj.(runtime.Object)
if !ok {
klog.Warningf("unknown type: %T, ignore", obj)
return
}
// All obj from client has been removed the information of apiversion/kind called MetaType,
// it is fatal to decode the obj as unstructured.Unstructure or unstructured.UnstructureList at edge.
err := util.SetMetaType(eventObj)
if err != nil {
klog.Warningf("failed to set meta type :%v", err)
}
c.events <- watch.Event{Type: t, Object: eventObj}
}
// OnAdd handle Add event
func (c *CommonResourceEventHandler) OnAdd(obj interface{}) {
if c.eventFilter != nil && !c.eventFilter.Create(obj) {
return
}
c.obj2Event(watch.Added, obj)
}
// OnUpdate handle Update event
func (c *CommonResourceEventHandler) OnUpdate(oldObj, newObj interface{}) {
if c.eventFilter != nil && !c.eventFilter.Update(oldObj, newObj) {
return
}
c.obj2Event(watch.Modified, newObj)
}
// OnDelete handle Delete event
func (c *CommonResourceEventHandler) OnDelete(obj interface{}) {
if c.eventFilter != nil && !c.eventFilter.Delete(obj) {
return
}
c.obj2Event(watch.Deleted, obj)
}
// NewCommonResourceEventHandler create CommonResourceEventHandler used by configmapManager and podManager
func NewCommonResourceEventHandler(events chan watch.Event, filter EventFilter) *CommonResourceEventHandler {
return &CommonResourceEventHandler{events: events, eventFilter: filter}
}
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