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/*
* 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 org.apache.dubbo.rpc.cluster.router.xds;
import org.apache.dubbo.common.utils.CollectionUtils;
import org.apache.dubbo.common.utils.ConcurrentHashSet;
import org.apache.dubbo.registry.xds.util.protocol.message.Endpoint;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.Consumer;
public class EdsEndpointManager {
private static final ConcurrentHashMap> ENDPOINT_LISTENERS = new ConcurrentHashMap<>();
private static final ConcurrentHashMap> ENDPOINT_DATA_CACHE = new ConcurrentHashMap<>();
private static final ConcurrentHashMap>> EDS_LISTENERS = new ConcurrentHashMap<>();
public EdsEndpointManager() {
}
public synchronized void subscribeEds(String cluster, EdsEndpointListener listener) {
Set listeners = ENDPOINT_LISTENERS.computeIfAbsent(cluster, key ->
new ConcurrentHashSet<>()
);
if (CollectionUtils.isEmpty(listeners)) {
doSubscribeEds(cluster);
}
listeners.add(listener);
if (ENDPOINT_DATA_CACHE.containsKey(cluster)) {
listener.onEndPointChange(cluster, ENDPOINT_DATA_CACHE.get(cluster));
}
}
private void doSubscribeEds(String cluster) {
EDS_LISTENERS.computeIfAbsent(cluster, key -> endpoints -> {
notifyEndpointChange(cluster, endpoints);
});
Consumer> consumer = EDS_LISTENERS.get(cluster);
//todo control plane subscribe eds
}
public synchronized void unSubscribeEds(String cluster, EdsEndpointListener listener) {
Set listeners = ENDPOINT_LISTENERS.get(cluster);
if (CollectionUtils.isEmpty(listeners)) {
return;
}
listeners.remove(listener);
if (listeners.isEmpty()) {
ENDPOINT_LISTENERS.remove(cluster);
doUnsubscribeEds(cluster);
}
}
private void doUnsubscribeEds(String cluster) {
Consumer> consumer = EDS_LISTENERS.remove(cluster);
if (consumer != null) {
//todo control plane unsubscribe eds
}
ENDPOINT_DATA_CACHE.remove(cluster);
}
public void notifyEndpointChange(String cluster, Set endpoints) {
ENDPOINT_DATA_CACHE.put(cluster, endpoints);
Set listeners = ENDPOINT_LISTENERS.get(cluster);
if (CollectionUtils.isEmpty(listeners)) {
return;
}
for (EdsEndpointListener listener : listeners) {
listener.onEndPointChange(cluster, endpoints);
}
}
// for test
static ConcurrentHashMap> getEndpointListeners() {
return ENDPOINT_LISTENERS;
}
// for test
static ConcurrentHashMap> getEndpointDataCache() {
return ENDPOINT_DATA_CACHE;
}
// for test
static ConcurrentHashMap>> getEdsListeners() {
return EDS_LISTENERS;
}
}