zhuxt2015 commented on code in PR #11144: URL: https://github.com/apache/dolphinscheduler/pull/11144#discussion_r934004485
########## dolphinscheduler-registry/dolphinscheduler-registry-plugins/dolphinscheduler-registry-raft/src/main/java/org/apache/dolphinscheduler/plugin/registry/raft/EphemeralNodeManager.java: ########## @@ -0,0 +1,405 @@ +/* + * 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.dolphinscheduler.plugin.registry.raft; + +import static com.alipay.sofa.jraft.util.BytesUtil.readUtf8; +import static com.alipay.sofa.jraft.util.BytesUtil.writeUtf8; + +import org.apache.dolphinscheduler.common.Constants; +import org.apache.dolphinscheduler.common.utils.HeartBeat; +import org.apache.dolphinscheduler.common.utils.JSONUtils; +import org.apache.dolphinscheduler.common.utils.NetUtils; +import org.apache.dolphinscheduler.registry.api.ConnectionListener; +import org.apache.dolphinscheduler.registry.api.ConnectionState; +import org.apache.dolphinscheduler.registry.api.Event; +import org.apache.dolphinscheduler.registry.api.SubscribeListener; +import org.apache.dolphinscheduler.spi.utils.StringUtils; + +import java.time.Instant; +import java.time.LocalDateTime; +import java.time.ZoneId; +import java.time.format.DateTimeFormatter; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashMap; +import java.util.Iterator; +import java.util.List; +import java.util.Map; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.Executors; +import java.util.concurrent.ScheduledExecutorService; +import java.util.concurrent.TimeUnit; + +import com.alipay.sofa.jraft.rhea.client.RheaKVStore; +import com.google.common.util.concurrent.ThreadFactoryBuilder; + +import lombok.extern.slf4j.Slf4j; + +/** + * 1. EphemeralNodeRefreshThread check current master node connection and check ephemeral node expire time + * 2. maintain Map<String, Long> activeMasterServers + * 3. maintain Map<String, Long> activeWorkerServers + * 4. maintain Map<Constants.REGISTRY_DOLPHINSCHEDULER_MASTERS, List<String>> master servers + * 5. maintain Map<Constants.REGISTRY_DOLPHINSCHEDULER_WORKERS, List<String>> worker servers + * 6. maintain Map<Constants.REGISTRY_DOLPHINSCHEDULER_DEAD_SERVERS, List<String>> dead servers + */ +@Slf4j +public class EphemeralNodeManager implements AutoCloseable { + private final List<ConnectionListener> connectionListeners = Collections.synchronizedList(new ArrayList<>()); + + private final Map<String, List<SubscribeListener>> dataSubScribeMap = new ConcurrentHashMap<>(); + + private RaftRegistryProperties properties; + + + private RheaKVStore kvStore; + + public EphemeralNodeManager(RaftRegistryProperties properties, RheaKVStore kvStore) { + this.properties = properties; + this.kvStore = kvStore; + } + + private final ScheduledExecutorService scheduledExecutorService = Executors.newScheduledThreadPool( + 2, + new ThreadFactoryBuilder().setNameFormat("EphemeralNodeRefreshThread").setDaemon(true).build()); + + public void start() { + scheduledExecutorService.scheduleWithFixedDelay(new ConnectionCheckTask(), + properties.getListenerCheckInterval().toMillis(), + properties.getListenerCheckInterval().toMillis(), + TimeUnit.MILLISECONDS); + scheduledExecutorService.scheduleWithFixedDelay(new SubscribeCheckTask(), + properties.getListenerCheckInterval().toMillis(), + properties.getListenerCheckInterval().toMillis(), + TimeUnit.MILLISECONDS); + } + + @Override + public void close() { + connectionListeners.clear(); + dataSubScribeMap.clear(); + scheduledExecutorService.shutdown(); + } + + public void addConnectionListener(ConnectionListener listener) { + connectionListeners.add(listener); + } + + public boolean addSubscribeListener(String path, SubscribeListener listener) { + return dataSubScribeMap.computeIfAbsent(path, k -> new ArrayList<>()).add(listener); + } + + public void removeSubscribeListener(String path) { + dataSubScribeMap.remove(path); + } + + private class ConnectionCheckTask implements Runnable { + private ConnectionState connectionState = null; + + @Override + public void run() { + checkConnection(); + checkActiveNode(); + } + + private void checkConnection() { + final String host = NetUtils.getHost(); + if (getActiveMasterServers().keySet().stream().anyMatch(address -> address.split(Constants.COLON)[0].equals(host))) { + if (connectionState == null && !connectionListeners.isEmpty()) { + triggerListener(ConnectionState.CONNECTED); + } else if (connectionState == ConnectionState.DISCONNECTED) { + triggerListener(ConnectionState.RECONNECTED); + } else { + triggerListener(ConnectionState.CONNECTED); + } + connectionState = ConnectionState.CONNECTED; + } + } + + private void checkActiveNode() { + long expireTime = properties.getConnectionExpireFactor() * properties.getListenerCheckInterval().toMillis(); + Map<String, Long> activeMasterServers = getActiveMasterServers(); + for (Map.Entry<String, Long> entry : activeMasterServers.entrySet()) { + if ((System.currentTimeMillis() - entry.getValue()) > expireTime) { + final String nodeAddress = entry.getKey(); + activeMasterServers.remove(nodeAddress); + updateActiveMaster(activeMasterServers); + addDeadServer(Constants.MASTER_TYPE, nodeAddress); + if (nodeAddress.split(Constants.COLON)[0].equals(NetUtils.getHost())) { + connectionState = ConnectionState.DISCONNECTED; + triggerListener(ConnectionState.DISCONNECTED); + removeNodeData(nodeAddress); + } + log.warn("Master server {} connect to raft cluster timeout, last heartbeat {}, timeout config {} ms", + nodeAddress, convertTimeToString(entry.getValue()), expireTime); + } + } + Map<String, Long> activeWorkerServers = getActiveWorkerServers(); + for (Map.Entry<String, Long> entry : activeWorkerServers.entrySet()) { + if ((System.currentTimeMillis() - entry.getValue()) > expireTime) { + final String nodeAddress = entry.getKey(); + activeWorkerServers.remove(nodeAddress); + updateActiveWorker(nodeAddress, activeWorkerServers); + removeWorkerGroup(nodeAddress); + addDeadServer(Constants.WORKER_TYPE, nodeAddress); + removeNodeData(nodeAddress); + log.warn("Worker server {} connect to raft cluster timeout, last heartbeat {}, timeout config {} ms", + nodeAddress, convertTimeToString(entry.getValue()), expireTime); + } + } + } + + private void triggerListener(ConnectionState connectionState) { + connectionListeners.forEach(listener -> listener.onUpdate(connectionState)); + } + } + + private class SubscribeCheckTask implements Runnable { + + private final Map<String, String> nodeDataMap = new ConcurrentHashMap<>(); + + @Override + public void run() { + subscribeCheck(); + } + + private void subscribeCheck() { + if (dataSubScribeMap.isEmpty()) { + return; + } + final Map<String, String> currentNodeDataMap = getNodeDataMap(); + // find the different + Map<String, String> addedData = new HashMap<>(); + Map<String, String> deletedData = new HashMap<>(); + Map<String, String> updatedData = new HashMap<>(); + for (Map.Entry<String, String> entry : currentNodeDataMap.entrySet()) { + final String oldData = nodeDataMap.get(entry.getKey()); + if (oldData == null) { + addedData.put(entry.getKey(), entry.getValue()); + } else { + HeartBeat newHeartBeat = HeartBeat.decodeHeartBeat(entry.getValue()); Review Comment: Like zookeeper, subscribe listener compare node hearbeat to notify listener. -- This is an automated message from the Apache Git Service. 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