pkg/xds/server/callbacks/dataplane_metadata_tracker.go

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 callbacks

import (
	"context"
	"sync"
)

import (
	core_model "github.com/apache/dubbo-kubernetes/pkg/core/resources/model"
	core_xds "github.com/apache/dubbo-kubernetes/pkg/core/xds"
)

type DataplaneMetadataTracker struct {
	sync.RWMutex
	metadataForDp map[core_model.ResourceKey]*core_xds.DataplaneMetadata
}

var _ DataplaneCallbacks = &DataplaneMetadataTracker{}

func NewDataplaneMetadataTracker() *DataplaneMetadataTracker {
	return &DataplaneMetadataTracker{
		metadataForDp: map[core_model.ResourceKey]*core_xds.DataplaneMetadata{},
	}
}

func (d *DataplaneMetadataTracker) Metadata(dpKey core_model.ResourceKey) *core_xds.DataplaneMetadata {
	d.RLock()
	defer d.RUnlock()
	return d.metadataForDp[dpKey]
}

func (d *DataplaneMetadataTracker) OnProxyReconnected(_ core_xds.StreamID, dpKey core_model.ResourceKey, _ context.Context, metadata core_xds.DataplaneMetadata) error {
	d.storeMetadata(dpKey, metadata)
	return nil
}

func (d *DataplaneMetadataTracker) OnProxyConnected(_ core_xds.StreamID, dpKey core_model.ResourceKey, _ context.Context, metadata core_xds.DataplaneMetadata) error {
	d.storeMetadata(dpKey, metadata)
	return nil
}

func (d *DataplaneMetadataTracker) storeMetadata(dpKey core_model.ResourceKey, metadata core_xds.DataplaneMetadata) {
	d.Lock()
	defer d.Unlock()
	d.metadataForDp[dpKey] = &metadata
}

func (d *DataplaneMetadataTracker) OnProxyDisconnected(_ context.Context, _ core_xds.StreamID, dpKey core_model.ResourceKey) {
	d.Lock()
	defer d.Unlock()
	delete(d.metadataForDp, dpKey)
}