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watch_apiresources.go
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/
watch_apiresources.go
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/*
Copyright 2024 Nokia.
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 packagediscovery
import (
"context"
"time"
"github.com/henderiw/logger/log"
"github.com/pkgserver-dev/pkgserver/pkg/reconcilers/packagediscovery/catalog"
"k8s.io/client-go/discovery"
"k8s.io/client-go/rest"
"sigs.k8s.io/controller-runtime/pkg/client"
)
type APIDiscovery interface {
Start(ctx context.Context)
Stop(ctx context.Context)
}
type apiDiscoverer struct {
client client.Client
discoveryClient *discovery.DiscoveryClient
catalogStore *catalog.Store
cancel context.CancelFunc
}
func NewAPIDiscoverer(
client client.Client,
config *rest.Config,
catalogStore *catalog.Store,
) APIDiscovery {
return &apiDiscoverer{
client: client,
discoveryClient: discovery.NewDiscoveryClientForConfigOrDie(config),
catalogStore: catalogStore,
}
}
func (r *apiDiscoverer) Stop(ctx context.Context) {
if r.cancel != nil {
r.cancel()
}
}
func (r *apiDiscoverer) Start(ctx context.Context) {
ctx, r.cancel = context.WithCancel(ctx)
log := log.FromContext(ctx).With("name", "apiDiscoverer")
for {
select {
case <-ctx.Done():
return
default:
apiResources, err := r.discoveryClient.ServerPreferredResources()
if err != nil {
log.Error("cannot get server resources")
} else {
r.catalogStore.UpdateAPIfromAPIResources(ctx, apiResources)
}
r.catalogStore.Print(ctx)
time.Sleep(10 * time.Second)
}
}
}