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watch_service.go
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watch_service.go
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/*
*
* Copyright 2020 gRPC 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 resolver
import (
"context"
"google.golang.org/grpc/xds/internal/xdsclient/xdsresource"
)
type listenerWatcher struct {
resourceName string
cancel func()
parent *xdsResolver
}
func newListenerWatcher(resourceName string, parent *xdsResolver) *listenerWatcher {
lw := &listenerWatcher{resourceName: resourceName, parent: parent}
lw.cancel = xdsresource.WatchListener(parent.xdsClient, resourceName, lw)
return lw
}
func (l *listenerWatcher) OnUpdate(update *xdsresource.ListenerResourceData) {
l.parent.serializer.Schedule(func(context.Context) {
l.parent.onListenerResourceUpdate(update.Resource)
})
}
func (l *listenerWatcher) OnError(err error) {
l.parent.serializer.Schedule(func(context.Context) {
l.parent.onListenerResourceError(err)
})
}
func (l *listenerWatcher) OnResourceDoesNotExist() {
l.parent.serializer.Schedule(func(context.Context) {
l.parent.onListenerResourceNotFound()
})
}
func (l *listenerWatcher) stop() {
l.cancel()
l.parent.logger.Infof("Canceling watch on Listener resource %q", l.resourceName)
}
type routeConfigWatcher struct {
resourceName string
cancel func()
parent *xdsResolver
}
func newRouteConfigWatcher(resourceName string, parent *xdsResolver) *routeConfigWatcher {
rw := &routeConfigWatcher{resourceName: resourceName, parent: parent}
rw.cancel = xdsresource.WatchRouteConfig(parent.xdsClient, resourceName, rw)
return rw
}
func (r *routeConfigWatcher) OnUpdate(update *xdsresource.RouteConfigResourceData) {
r.parent.serializer.Schedule(func(context.Context) {
r.parent.onRouteConfigResourceUpdate(r.resourceName, update.Resource)
})
}
func (r *routeConfigWatcher) OnError(err error) {
r.parent.serializer.Schedule(func(context.Context) {
r.parent.onRouteConfigResourceError(r.resourceName, err)
})
}
func (r *routeConfigWatcher) OnResourceDoesNotExist() {
r.parent.serializer.Schedule(func(context.Context) {
r.parent.onRouteConfigResourceNotFound(r.resourceName)
})
}
func (r *routeConfigWatcher) stop() {
r.cancel()
r.parent.logger.Infof("Canceling watch on RouteConfiguration resource %q", r.resourceName)
}