| /* |
| * 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.admin.registry.mapping; |
| |
| import org.apache.dubbo.common.URL; |
| import org.apache.dubbo.registry.client.ServiceDiscovery; |
| import org.apache.dubbo.registry.client.event.listener.ServiceInstancesChangedListener; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| public class AdminServiceInstancesChangedListener extends ServiceInstancesChangedListener { |
| |
| private AddressChangeListener addressChangeListener; |
| |
| private Map<String, List<ServiceInstancesChangedListener.ProtocolServiceKeyWithUrls>> oldServiceUrls; |
| |
| public AdminServiceInstancesChangedListener(Set<String> serviceNames, ServiceDiscovery serviceDiscovery, AddressChangeListener addressChangeListener) { |
| super(serviceNames, serviceDiscovery); |
| this.addressChangeListener = addressChangeListener; |
| oldServiceUrls = new HashMap<>(); |
| } |
| |
| protected void notifyAddressChanged() { |
| oldServiceUrls.keySet().stream() |
| .filter(protocolServiceKey -> !serviceUrls.containsKey(protocolServiceKey)) |
| .forEach(protocolServiceKey -> addressChangeListener.notifyAddressChanged(protocolServiceKey, new ArrayList<>())); |
| serviceUrls.forEach((protocolServiceKey, urls) -> addressChangeListener.notifyAddressChanged(protocolServiceKey, extractUrls(urls))); |
| |
| oldServiceUrls = serviceUrls; |
| } |
| |
| private List<URL> extractUrls(List<ServiceInstancesChangedListener.ProtocolServiceKeyWithUrls> keyUrls) { |
| return keyUrls.stream() |
| .flatMap((protocolServiceKeyWithUrls) -> protocolServiceKeyWithUrls.getUrls().stream()) |
| .collect(Collectors.toList()); |
| } |
| } |