update(REQ-2324) - 修复项目使用 Undertow 配合 Nacos 的注册中心时，停止应用会导致一些异常的输出
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package cn.axzo.workflow.server.common.hook;
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import org.springframework.context.SmartLifecycle;
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/**
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* TODO
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*
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* @author wangli
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* @since 2024/6/6 14:35
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*/
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public class NacosShutdownHook implements SmartLifecycle {
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@Override
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public void start() {
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}
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@Override
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public void stop() {
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}
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@Override
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public boolean isRunning() {
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return false;
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}
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}
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/*
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* Copyright 2013-2018 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.alibaba.cloud.nacos.discovery;
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import com.alibaba.cloud.nacos.NacosDiscoveryProperties;
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import com.alibaba.cloud.nacos.NacosServiceManager;
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import com.alibaba.nacos.api.naming.NamingService;
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import com.alibaba.nacos.api.naming.listener.Event;
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import com.alibaba.nacos.api.naming.listener.EventListener;
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import com.alibaba.nacos.api.naming.listener.NamingEvent;
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import com.alibaba.nacos.api.naming.pojo.Instance;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.ObjectProvider;
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import org.springframework.cloud.client.discovery.event.HeartbeatEvent;
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import org.springframework.context.ApplicationEventPublisher;
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import org.springframework.context.ApplicationEventPublisherAware;
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import org.springframework.context.SmartLifecycle;
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import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
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import java.util.Arrays;
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import java.util.List;
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import java.util.Map;
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import java.util.Optional;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.ScheduledFuture;
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import java.util.concurrent.atomic.AtomicBoolean;
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import java.util.concurrent.atomic.AtomicLong;
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/**
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* @author xiaojing
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* @author yuhuangbin
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*/
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public class NacosWatch implements ApplicationEventPublisherAware, SmartLifecycle {
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private static final Logger log = LoggerFactory.getLogger(NacosWatch.class);
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private Map<String, EventListener> listenerMap = new ConcurrentHashMap<>(16);
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private final AtomicBoolean running = new AtomicBoolean(false);
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private final AtomicLong nacosWatchIndex = new AtomicLong(0);
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private ApplicationEventPublisher publisher;
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private ScheduledFuture<?> watchFuture;
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private NacosServiceManager nacosServiceManager;
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private final NacosDiscoveryProperties properties;
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private final ThreadPoolTaskScheduler taskScheduler;
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public NacosWatch(NacosServiceManager nacosServiceManager,
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NacosDiscoveryProperties properties,
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ObjectProvider<ThreadPoolTaskScheduler> taskScheduler) {
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this.nacosServiceManager = nacosServiceManager;
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this.properties = properties;
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this.taskScheduler = taskScheduler.stream().findAny()
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.orElseGet(NacosWatch::getTaskScheduler);
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}
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private static ThreadPoolTaskScheduler getTaskScheduler() {
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ThreadPoolTaskScheduler taskScheduler = new ThreadPoolTaskScheduler();
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taskScheduler.setBeanName("Nacos-Watch-Task-Scheduler");
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taskScheduler.initialize();
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return taskScheduler;
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}
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@Override
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public void setApplicationEventPublisher(ApplicationEventPublisher publisher) {
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this.publisher = publisher;
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}
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@Override
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public boolean isAutoStartup() {
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return true;
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}
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@Override
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public void stop(Runnable callback) {
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this.stop();
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callback.run();
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}
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@Override
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public void start() {
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if (this.running.compareAndSet(false, true)) {
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EventListener eventListener = listenerMap.computeIfAbsent(buildKey(),
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event -> new EventListener() {
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@Override
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public void onEvent(Event event) {
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if (event instanceof NamingEvent) {
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List<Instance> instances = ((NamingEvent) event)
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.getInstances();
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Optional<Instance> instanceOptional = selectCurrentInstance(
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instances);
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instanceOptional.ifPresent(currentInstance -> {
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resetIfNeeded(currentInstance);
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});
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}
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}
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});
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NamingService namingService = nacosServiceManager
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.getNamingService(properties.getNacosProperties());
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try {
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namingService.subscribe(properties.getService(), properties.getGroup(),
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Arrays.asList(properties.getClusterName()), eventListener);
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} catch (Exception e) {
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log.error("namingService subscribe failed, properties:{}", properties, e);
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}
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this.watchFuture = this.taskScheduler.scheduleWithFixedDelay(
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this::nacosServicesWatch, this.properties.getWatchDelay());
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}
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}
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private String buildKey() {
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return String.join(":", properties.getService(), properties.getGroup());
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}
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private void resetIfNeeded(Instance instance) {
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if (!properties.getMetadata().equals(instance.getMetadata())) {
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properties.setMetadata(instance.getMetadata());
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}
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}
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private Optional<Instance> selectCurrentInstance(List<Instance> instances) {
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return instances.stream()
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.filter(instance -> properties.getIp().equals(instance.getIp())
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&& properties.getPort() == instance.getPort())
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.findFirst();
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}
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@Override
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public void stop() {
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if (this.running.compareAndSet(true, false)) {
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if (this.watchFuture != null) {
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// shutdown current user-thread,
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// then the other daemon-threads will terminate automatic.
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this.taskScheduler.shutdown();
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this.watchFuture.cancel(true);
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}
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EventListener eventListener = listenerMap.get(buildKey());
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try {
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NamingService namingService = nacosServiceManager
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.getNamingService(properties.getNacosProperties());
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namingService.unsubscribe(properties.getService(), properties.getGroup(),
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Arrays.asList(properties.getClusterName()), eventListener);
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} catch (Exception e) {
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log.error("namingService unsubscribe failed, properties:{}", properties,
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e);
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}
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}
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}
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@Override
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public boolean isRunning() {
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return this.running.get();
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}
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@Override
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public int getPhase() {
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return Integer.MAX_VALUE - 1;
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}
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public void nacosServicesWatch() {
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// nacos doesn't support watch now , publish an event every 30 seconds.
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this.publisher.publishEvent(
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new HeartbeatEvent(this, nacosWatchIndex.getAndIncrement()));
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}
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}
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/*
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* Copyright 1999-2018 Alibaba Group Holding Ltd.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.alibaba.nacos.client.naming.core;
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import com.alibaba.nacos.api.exception.NacosException;
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import com.alibaba.nacos.common.lifecycle.Closeable;
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import com.alibaba.nacos.common.utils.IoUtils;
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import com.alibaba.nacos.common.utils.JacksonUtils;
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import com.alibaba.nacos.common.utils.StringUtils;
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import com.alibaba.nacos.common.utils.ThreadUtils;
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import java.net.DatagramPacket;
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import java.net.DatagramSocket;
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import java.nio.charset.Charset;
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import java.util.concurrent.ScheduledExecutorService;
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import java.util.concurrent.ScheduledThreadPoolExecutor;
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import java.util.concurrent.ThreadFactory;
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import static com.alibaba.nacos.client.utils.LogUtils.NAMING_LOGGER;
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/**
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* Push receiver.
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*
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* @author xuanyin
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*/
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public class PushReceiver implements Runnable, Closeable {
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private static final Charset UTF_8 = Charset.forName("UTF-8");
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private static final int UDP_MSS = 64 * 1024;
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private ScheduledExecutorService executorService;
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private DatagramSocket udpSocket;
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private HostReactor hostReactor;
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private volatile boolean closed = false;
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public PushReceiver(HostReactor hostReactor) {
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try {
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this.hostReactor = hostReactor;
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this.udpSocket = new DatagramSocket();
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this.executorService = new ScheduledThreadPoolExecutor(1, new ThreadFactory() {
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@Override
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public Thread newThread(Runnable r) {
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Thread thread = new Thread(r);
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thread.setDaemon(true);
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thread.setName("com.alibaba.nacos.naming.push.receiver");
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return thread;
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}
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});
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this.executorService.execute(this);
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} catch (Exception e) {
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NAMING_LOGGER.error("[NA] init udp socket failed", e);
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}
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}
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@Override
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public void run() {
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while (!closed) {
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try {
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// byte[] is initialized with 0 full filled by default
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byte[] buffer = new byte[UDP_MSS];
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DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
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udpSocket.receive(packet);
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String json = new String(IoUtils.tryDecompress(packet.getData()), UTF_8).trim();
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NAMING_LOGGER.info("received push data: " + json + " from " + packet.getAddress().toString());
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PushPacket pushPacket = JacksonUtils.toObj(json, PushPacket.class);
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String ack;
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if ("dom".equals(pushPacket.type) || "service".equals(pushPacket.type)) {
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hostReactor.processServiceJson(pushPacket.data);
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// send ack to server
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ack = "{\"type\": \"push-ack\"" + ", \"lastRefTime\":\"" + pushPacket.lastRefTime + "\", \"data\":"
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+ "\"\"}";
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} else if ("dump".equals(pushPacket.type)) {
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// dump data to server
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ack = "{\"type\": \"dump-ack\"" + ", \"lastRefTime\": \"" + pushPacket.lastRefTime + "\", \"data\":"
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+ "\"" + StringUtils.escapeJavaScript(JacksonUtils.toJson(hostReactor.getServiceInfoMap()))
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+ "\"}";
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} else {
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// do nothing send ack only
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ack = "{\"type\": \"unknown-ack\"" + ", \"lastRefTime\":\"" + pushPacket.lastRefTime
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+ "\", \"data\":" + "\"\"}";
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}
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udpSocket.send(new DatagramPacket(ack.getBytes(UTF_8), ack.getBytes(UTF_8).length,
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packet.getSocketAddress()));
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} catch (Exception e) {
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if (closed) {
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return;
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}
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NAMING_LOGGER.error("[NA] error while receiving push data", e);
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}
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}
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}
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@Override
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public void shutdown() throws NacosException {
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String className = this.getClass().getName();
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NAMING_LOGGER.info("{} do shutdown begin", className);
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ThreadUtils.shutdownThreadPool(executorService, NAMING_LOGGER);
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closed = true;
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udpSocket.close();
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NAMING_LOGGER.info("{} do shutdown stop", className);
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}
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public static class PushPacket {
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public String type;
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public long lastRefTime;
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public String data;
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}
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public int getUdpPort() {
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return this.udpSocket.getLocalPort();
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}
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}
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