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cluster.go
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cluster.go
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/*
* Copyright 2019 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
*
* 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
*
*/
package controller
import (
"fmt"
"time"
"github.com/gardener/controller-manager-library/pkg/controllermanager/cluster"
"github.com/gardener/controller-manager-library/pkg/logger"
"github.com/gardener/controller-manager-library/pkg/resources"
"github.com/gardener/controller-manager-library/pkg/utils"
)
type clusterResourceInfo struct {
pools []*pool
}
type ClusterHandler struct {
logger.LogContext
controller *controller
cluster cluster.Interface
resources map[ResourceKey]*clusterResourceInfo
}
func newClusterHandler(controller *controller, cluster cluster.Interface) *ClusterHandler {
return &ClusterHandler{
controller.NewContext("cluster", cluster.GetName()),
controller,
cluster,
map[ResourceKey]*clusterResourceInfo{},
}
}
func (c *ClusterHandler) whenReady() {
c.controller.whenReady()
}
func (c *ClusterHandler) String() string {
return c.cluster.GetName()
}
func (c *ClusterHandler) GetAliases() utils.StringSet {
return c.controller.GetClusterAliases(c.cluster.GetName())
}
func (c *ClusterHandler) GetResource(resourceKey ResourceKey) (resources.Interface, error) {
return c.cluster.GetResource(resourceKey.GroupKind())
}
func (c *ClusterHandler) register(resourceKey ResourceKey, namespace string, optionsFunc resources.TweakListOptionsFunc, usedpool *pool) error {
i := c.resources[resourceKey]
if i == nil {
i = &clusterResourceInfo{[]*pool{usedpool}}
c.resources[resourceKey] = i
resource, err := c.cluster.GetResource(resourceKey.GroupKind())
if err != nil {
return err
}
if err := resource.AddSelectedEventHandler(c.GetEventHandlerFuncs(), namespace, optionsFunc); err != nil {
return err
}
} else {
for _, p := range i.pools {
if p == usedpool {
return nil
}
}
i.pools = append(i.pools, usedpool)
}
return nil
}
func (c *ClusterHandler) GetEventHandlerFuncs() resources.ResourceEventHandlerFuncs {
return resources.ResourceEventHandlerFuncs{
AddFunc: c.objectAdd,
UpdateFunc: c.objectUpdate,
DeleteFunc: c.objectDelete,
}
}
///////////////////////////////////////////////////////////////////////////////
func (c *ClusterHandler) EnqueueKey(key resources.ClusterObjectKey) error {
//c.Infof("enqueue %s", obj.Description())
gk := key.GroupKind()
rk := NewResourceKey(gk.Group, gk.Kind)
i := c.resources[rk]
if i == nil {
c.Warnf("no resource info for type %s", rk)
return fmt.Errorf("cluster %q: no resource info for %s", c, rk)
}
if i.pools == nil || len(i.pools) == 0 {
c.Warnf("no worker pool for type %s", rk)
return fmt.Errorf("cluster %q: no worker pool for type %s", c, rk)
}
for _, p := range i.pools {
p.EnqueueKey(key)
}
return nil
}
func (c *ClusterHandler) enqueue(obj resources.Object, e func(p *pool, r resources.Object)) error {
c.whenReady()
//c.Infof("enqueue %s", obj.Description())
i := c.resources[GetResourceKey(obj)]
if i.pools == nil || len(i.pools) == 0 {
c.Warnf("no worker pool for type %s", obj.GroupKind())
return fmt.Errorf("no worker pool for type %s", obj.GroupKind())
}
for _, p := range i.pools {
//p.Infof("enqueue %s", resources.ObjectrKey(obj))
e(p, obj)
}
return nil
}
func enq(p *pool, obj resources.Object) {
p.EnqueueObject(obj)
}
func (c *ClusterHandler) EnqueueObject(obj resources.Object) error {
return c.enqueue(obj, enq)
}
func enqRateLimited(p *pool, obj resources.Object) {
p.EnqueueObjectRateLimited(obj)
}
func (c *ClusterHandler) EnqueueObjectRateLimited(obj resources.Object) error {
return c.enqueue(obj, enqRateLimited)
}
func (c *ClusterHandler) EnqueueObjectAfter(obj resources.Object, duration time.Duration) error {
e := func(p *pool, obj resources.Object) {
p.EnqueueObjectAfter(obj, duration)
}
return c.enqueue(obj, e)
}
///////////////////////////////////////////////////////////////////////////////
func (c *ClusterHandler) objectAdd(obj resources.Object) {
c.Debugf("** GOT add event for %s", obj.Description())
if c.controller.mustHandle(obj) {
c.EnqueueObject(obj)
}
}
func (c *ClusterHandler) objectUpdate(old, new resources.Object) {
c.Debugf("** GOT update event for %s: %s", new.Description(), new.GetResourceVersion())
if !c.controller.mustHandle(old) && !c.controller.mustHandle(new) {
return
}
c.EnqueueObject(new)
}
func (c *ClusterHandler) objectDelete(obj resources.Object) {
c.Debugf("** GOT delete event for %s: %s", obj.Description(), obj.GetResourceVersion())
if c.controller.mustHandle(obj) {
c.EnqueueObject(obj)
}
}