docker使用容器内ip服务调用不通（会锁定一个ip去调用，上生产环境删除该类）

/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * 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 com.alibaba.nacos.client.naming.core;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.StrUtil;
import com.alibaba.nacos.api.exception.NacosException;
import com.alibaba.nacos.api.naming.pojo.Instance;
import com.alibaba.nacos.api.naming.pojo.ServiceInfo;
import com.alibaba.nacos.client.monitor.MetricsMonitor;
import com.alibaba.nacos.client.naming.backups.FailoverReactor;
import com.alibaba.nacos.client.naming.beat.BeatInfo;
import com.alibaba.nacos.client.naming.beat.BeatReactor;
import com.alibaba.nacos.client.naming.cache.DiskCache;
import com.alibaba.nacos.client.naming.net.NamingProxy;
import com.alibaba.nacos.client.naming.utils.UtilAndComs;
import com.alibaba.nacos.common.lifecycle.Closeable;
import com.alibaba.nacos.common.utils.JacksonUtils;
import com.alibaba.nacos.common.utils.StringUtils;
import com.alibaba.nacos.common.utils.ThreadUtils;

import java.util.*;
import java.util.concurrent.*;

import static com.alibaba.nacos.client.utils.LogUtils.NAMING_LOGGER;

/**
 * Host reactor.
 *
 * @author xuanyin
 */
public class HostReactor implements Closeable {

    private static final long DEFAULT_DELAY = 1000L;

    private static final long UPDATE_HOLD_INTERVAL = 5000L;

    private final Map<String, ScheduledFuture<?>> futureMap = new HashMap<String, ScheduledFuture<?>>();

    private final Map<String, ServiceInfo> serviceInfoMap;

    private final Map<String, Object> updatingMap;

    private final PushReceiver pushReceiver;

    private final EventDispatcher eventDispatcher;

    private final BeatReactor beatReactor;

    private final NamingProxy serverProxy;

    private final FailoverReactor failoverReactor;

    private final String cacheDir;

    private final ScheduledExecutorService executor;

    public HostReactor(EventDispatcher eventDispatcher, NamingProxy serverProxy, BeatReactor beatReactor,
                       String cacheDir) {
        this(eventDispatcher, serverProxy, beatReactor, cacheDir, false, UtilAndComs.DEFAULT_POLLING_THREAD_COUNT);
    }

    public HostReactor(EventDispatcher eventDispatcher, NamingProxy serverProxy, BeatReactor beatReactor,
                       String cacheDir, boolean loadCacheAtStart, int pollingThreadCount) {
        // init executorService
        this.executor = new ScheduledThreadPoolExecutor(pollingThreadCount, new ThreadFactory() {
            @Override
            public Thread newThread(Runnable r) {
                Thread thread = new Thread(r);
                thread.setDaemon(true);
                thread.setName("com.alibaba.nacos.client.naming.updater");
                return thread;
            }
        });
        this.eventDispatcher = eventDispatcher;
        this.beatReactor = beatReactor;
        this.serverProxy = serverProxy;
        this.cacheDir = cacheDir;
        if (loadCacheAtStart) {
            this.serviceInfoMap = new ConcurrentHashMap<String, ServiceInfo>(DiskCache.read(this.cacheDir));
        } else {
            this.serviceInfoMap = new ConcurrentHashMap<String, ServiceInfo>(16);
        }

        this.updatingMap = new ConcurrentHashMap<String, Object>();
        this.failoverReactor = new FailoverReactor(this, cacheDir);
        this.pushReceiver = new PushReceiver(this);
    }

    public Map<String, ServiceInfo> getServiceInfoMap() {
        return serviceInfoMap;
    }

    public synchronized ScheduledFuture<?> addTask(UpdateTask task) {
        return executor.schedule(task, DEFAULT_DELAY, TimeUnit.MILLISECONDS);
    }

    /**
     * Process service json.
     *
     * @param json service json
     * @return service info
     */
    public ServiceInfo processServiceJson(String json) {
        ServiceInfo serviceInfo = JacksonUtils.toObj(json, ServiceInfo.class);
        ServiceInfo oldService = serviceInfoMap.get(serviceInfo.getKey());
        if (serviceInfo.getHosts() == null || !serviceInfo.validate()) {
            //empty or error push, just ignore
            return oldService;
        }

        boolean changed = false;

        if (oldService != null) {

            if (oldService.getLastRefTime() > serviceInfo.getLastRefTime()) {
                NAMING_LOGGER.warn("out of date data received, old-t: " + oldService.getLastRefTime() + ", new-t: "
                        + serviceInfo.getLastRefTime());
            }

            serviceInfoMap.put(serviceInfo.getKey(), serviceInfo);

            Map<String, Instance> oldHostMap = new HashMap<String, Instance>(oldService.getHosts().size());
            for (Instance host : oldService.getHosts()) {
                oldHostMap.put(host.toInetAddr(), host);
            }

            Map<String, Instance> newHostMap = new HashMap<String, Instance>(serviceInfo.getHosts().size());
            for (Instance host : serviceInfo.getHosts()) {
                newHostMap.put(host.toInetAddr(), host);
            }

            Set<Instance> modHosts = new HashSet<Instance>();
            Set<Instance> newHosts = new HashSet<Instance>();
            Set<Instance> remvHosts = new HashSet<Instance>();

            List<Map.Entry<String, Instance>> newServiceHosts = new ArrayList<Map.Entry<String, Instance>>(
                    newHostMap.entrySet());
            for (Map.Entry<String, Instance> entry : newServiceHosts) {
                Instance host = entry.getValue();
                String key = entry.getKey();
                if (oldHostMap.containsKey(key) && !StringUtils
                        .equals(host.toString(), oldHostMap.get(key).toString())) {
//                    modHosts.add(host);
                    continue;
                }

                if (!oldHostMap.containsKey(key)) {
                    newHosts.add(host);
                }
            }

            for (Map.Entry<String, Instance> entry : oldHostMap.entrySet()) {
                Instance host = entry.getValue();
                String key = entry.getKey();
                if (newHostMap.containsKey(key)) {
                    continue;
                }

                if (!newHostMap.containsKey(key)) {
//                    remvHosts.add(host);
                }

            }

            if (newHosts.size() > 0) {
                changed = true;
//                NAMING_LOGGER.info("new ips(" + newHosts.size() + ") service: " + serviceInfo.getKey() + " -> "
//                        + JacksonUtils.toJson(newHosts));
            }

            if (remvHosts.size() > 0) {
                changed = true;
//                NAMING_LOGGER.info("removed ips(" + remvHosts.size() + ") service: " + serviceInfo.getKey() + " -> "
//                        + JacksonUtils.toJson(remvHosts));
            }

            if (modHosts.size() > 0) {
                changed = true;
                updateBeatInfo(modHosts);
//                NAMING_LOGGER.info("modified ips(" + modHosts.size() + ") service: " + serviceInfo.getKey() + " -> "
//                        + JacksonUtils.toJson(modHosts));
            }

            serviceInfo.setJsonFromServer(json);

            if (newHosts.size() > 0 || remvHosts.size() > 0 || modHosts.size() > 0) {
                eventDispatcher.serviceChanged(serviceInfo);
                DiskCache.write(serviceInfo, cacheDir);
            }

        } else {
            changed = true;
            NAMING_LOGGER.info("init new ips(" + serviceInfo.ipCount() + ") service: " + serviceInfo.getKey() + " -> "
                    + JacksonUtils.toJson(serviceInfo.getHosts()));
            serviceInfoMap.put(serviceInfo.getKey(), serviceInfo);
            eventDispatcher.serviceChanged(serviceInfo);
            serviceInfo.setJsonFromServer(json);
            DiskCache.write(serviceInfo, cacheDir);
        }

        MetricsMonitor.getServiceInfoMapSizeMonitor().set(serviceInfoMap.size());

        if (changed) {
            NAMING_LOGGER.info("current ips:(" + serviceInfo.ipCount() + ") service: " + serviceInfo.getKey() + " -> "
                    + JacksonUtils.toJson(serviceInfo.getHosts()));
        }
        if(StrUtil.contains(serviceInfo.getName(),"DEFAULT_GROUP")){
            List<Instance> hosts = serviceInfo.getHosts();
            Instance instance = hosts.get(0);
            instance.setIp("192.168.23.30");
            serviceInfo.setHosts(CollUtil.newArrayList(instance));
        }
        return serviceInfo;
    }

    private void updateBeatInfo(Set<Instance> modHosts) {
        for (Instance instance : modHosts) {
            String key = beatReactor.buildKey(instance.getServiceName(), instance.getIp(), instance.getPort());
            if (beatReactor.dom2Beat.containsKey(key) && instance.isEphemeral()) {
                BeatInfo beatInfo = beatReactor.buildBeatInfo(instance);
                beatReactor.addBeatInfo(instance.getServiceName(), beatInfo);
            }
        }
    }

    private ServiceInfo getServiceInfo0(String serviceName, String clusters) {

        String key = ServiceInfo.getKey(serviceName, clusters);

        return serviceInfoMap.get(key);
    }

    public ServiceInfo getServiceInfoDirectlyFromServer(final String serviceName, final String clusters)
            throws NacosException {
        String result = serverProxy.queryList(serviceName, clusters, 0, false);
        if (StringUtils.isNotEmpty(result)) {
            return JacksonUtils.toObj(result, ServiceInfo.class);
        }
        return null;
    }

    public ServiceInfo getServiceInfo(final String serviceName, final String clusters) {

        NAMING_LOGGER.debug("failover-mode: " + failoverReactor.isFailoverSwitch());
        String key = ServiceInfo.getKey(serviceName, clusters);
        if (failoverReactor.isFailoverSwitch()) {
            return failoverReactor.getService(key);
        }

        ServiceInfo serviceObj = getServiceInfo0(serviceName, clusters);

        if (null == serviceObj) {
            serviceObj = new ServiceInfo(serviceName, clusters);

            serviceInfoMap.put(serviceObj.getKey(), serviceObj);

            updatingMap.put(serviceName, new Object());
            updateServiceNow(serviceName, clusters);
            updatingMap.remove(serviceName);

        } else if (updatingMap.containsKey(serviceName)) {

            if (UPDATE_HOLD_INTERVAL > 0) {
                // hold a moment waiting for update finish
                synchronized (serviceObj) {
                    try {
                        serviceObj.wait(UPDATE_HOLD_INTERVAL);
                    } catch (InterruptedException e) {
                        NAMING_LOGGER
                                .error("[getServiceInfo] serviceName:" + serviceName + ", clusters:" + clusters, e);
                    }
                }
            }
        }

        scheduleUpdateIfAbsent(serviceName, clusters);

        return serviceInfoMap.get(serviceObj.getKey());
    }

    /**
     * Schedule update if absent.
     *
     * @param serviceName service name
     * @param clusters    clusters
     */
    public void scheduleUpdateIfAbsent(String serviceName, String clusters) {
        if (futureMap.get(ServiceInfo.getKey(serviceName, clusters)) != null) {
            return;
        }

        synchronized (futureMap) {
            if (futureMap.get(ServiceInfo.getKey(serviceName, clusters)) != null) {
                return;
            }

            ScheduledFuture<?> future = addTask(new UpdateTask(serviceName, clusters));
            futureMap.put(ServiceInfo.getKey(serviceName, clusters), future);
        }
    }

    /**
     * Update service now.
     *
     * @param serviceName service name
     * @param clusters    clusters
     */
    public void updateServiceNow(String serviceName, String clusters) {
        ServiceInfo oldService = getServiceInfo0(serviceName, clusters);
        try {

            String result = serverProxy.queryList(serviceName, clusters, pushReceiver.getUdpPort(), false);

            if (StringUtils.isNotEmpty(result)) {
                processServiceJson(result);
            }
        } catch (Exception e) {
            NAMING_LOGGER.error("[NA] failed to update serviceName: " + serviceName, e);
        } finally {
            if (oldService != null) {
                synchronized (oldService) {
                    oldService.notifyAll();
                }
            }
        }
    }

    /**
     * Refresh only.
     *
     * @param serviceName service name
     * @param clusters    cluster
     */
    public void refreshOnly(String serviceName, String clusters) {
        try {
            serverProxy.queryList(serviceName, clusters, pushReceiver.getUdpPort(), false);
        } catch (Exception e) {
            NAMING_LOGGER.error("[NA] failed to update serviceName: " + serviceName, e);
        }
    }

    @Override
    public void shutdown() throws NacosException {
        String className = this.getClass().getName();
        NAMING_LOGGER.info("{} do shutdown begin", className);
        ThreadUtils.shutdownThreadPool(executor, NAMING_LOGGER);
        pushReceiver.shutdown();
        failoverReactor.shutdown();
        NAMING_LOGGER.info("{} do shutdown stop", className);
    }

    public class UpdateTask implements Runnable {

        long lastRefTime = Long.MAX_VALUE;

        private final String clusters;

        private final String serviceName;

        public UpdateTask(String serviceName, String clusters) {
            this.serviceName = serviceName;
            this.clusters = clusters;
        }

        @Override
        public void run() {
            long delayTime = -1;

            try {
                ServiceInfo serviceObj = serviceInfoMap.get(ServiceInfo.getKey(serviceName, clusters));

                if (serviceObj == null) {
                    updateServiceNow(serviceName, clusters);
                    delayTime = DEFAULT_DELAY;
                    return;
                }

                if (serviceObj.getLastRefTime() <= lastRefTime) {
                    updateServiceNow(serviceName, clusters);
                    serviceObj = serviceInfoMap.get(ServiceInfo.getKey(serviceName, clusters));
                } else {
                    // if serviceName already updated by push, we should not override it
                    // since the push data may be different from pull through force push
                    refreshOnly(serviceName, clusters);
                }

                lastRefTime = serviceObj.getLastRefTime();

                if (!eventDispatcher.isSubscribed(serviceName, clusters) && !futureMap
                        .containsKey(ServiceInfo.getKey(serviceName, clusters))) {
                    // abort the update task
                    NAMING_LOGGER.info("update task is stopped, service:" + serviceName + ", clusters:" + clusters);
                    return;
                }

                delayTime = serviceObj.getCacheMillis();

            } catch (Throwable e) {
                NAMING_LOGGER.warn("[NA] failed to update serviceName: " + serviceName, e);
            } finally {
                if (delayTime > 0) {
                    executor.schedule(this, delayTime, TimeUnit.MILLISECONDS);
                }
            }

        }
    }
}