aloyszhang commented on code in PR #9929: URL: https://github.com/apache/inlong/pull/9929#discussion_r1554830263
########## inlong-audit/audit-service/src/main/java/elector/impl/ElectorImpl.java: ########## @@ -0,0 +1,198 @@ +/* + * 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 elector.impl; + +import elector.api.Elector; +import elector.api.ElectorConfig; +import elector.task.DBMonitorTask; +import org.apache.commons.lang3.StringUtils; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.util.Random; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Executors; +import java.util.concurrent.TimeUnit; + +/** + * Elector Impl + */ +public class ElectorImpl extends Elector { + + private static final Logger logger = LoggerFactory.getLogger(ElectorImpl.class); + private final ElectorConfig electorConfig; + private ExecutorService fixedThreadPool = Executors.newFixedThreadPool(3); + private boolean canElector = true; + private DBDataSource dbDataSource; + private long sleepTime = 0L; + + public ElectorImpl(ElectorConfig electorConfig) { + this.electorConfig = electorConfig; + this.dbDataSource = new DBDataSource(electorConfig); + } + + /** + * init + * + * @throws Exception + */ + public void init() throws Exception { + try { + logger.info("Init elector impl..."); + + dbDataSource.init(false); + + ElectorWorkerThread electorWorkerThread = new ElectorWorkerThread(); + fixedThreadPool.execute(electorWorkerThread); + + DBMonitorTask dbMonitorTask = new DBMonitorTask(electorConfig, dbDataSource); + fixedThreadPool.execute(dbMonitorTask); + } catch (Exception exception) { + logger.error("Exception :{}", exception.getMessage()); + } + } + + /** + * Judge where is leader + * + * @return + */ + public boolean isLeader() { + return this.isLeader; + } + + /** + * Release leader + */ + public void releaseLeader() { + if (this.isLeader) + try { + dbDataSource.releaseLeader(); + } catch (Exception exception) { + logger.error("Exception :{}", exception.getMessage()); + } + + try { + TimeUnit.SECONDS.sleep(40L); + } catch (Exception exception) { + logger.error("Exception :{}", exception.getMessage()); + } + } + + /** + * Replace leader + * + * @param newLeaderId + */ + public void replaceLeader(String newLeaderId) { + sleepTime = (electorConfig.getTryToBeLeaderInterval() * 2); + dbDataSource.replaceLeader(newLeaderId); + } + + /** + * Get leader + * + * @param serviceId + * @return + */ + public String getLeader(String serviceId) { + return dbDataSource.getCurrentLeader(); + } + + /** + * Judge where can be elector + * + * @param canElector + */ + public void canElector(boolean canElector) { + this.canElector = canElector; + } + + /** + * Rebuild elector DBSource + * + * @return + */ + public boolean reBuildElectorDBSource() { + canElector(false); + try { + releaseLeader(); + dbDataSource.close(); + dbDataSource.init(true); + canElector(true); + } catch (Exception exception) { + logger.error("Exception :{}", exception.getMessage()); + return false; + } + return true; + } + + /** + * close + * + * @return + */ + public boolean close() { + return false; + } + + class ElectorWorkerThread implements Runnable { + + Random random; + + ElectorWorkerThread() { + this.random = new Random(); + } + + public void run() { + while (true) { + if (canElector) { + dbDataSource.leaderSelector(); + } + + String leaderId = dbDataSource.getCurrentLeader(); + if (!StringUtils.isEmpty(leaderId)) { + if (electorConfig.getLeaderId().equals(leaderId)) { + if (!isLeader + && electorConfig.getElectorChangeListener() != null) { + electorConfig.getElectorChangeListener().leaderChanged(true); + } + + isLeader = true; + sleepTime = (long) electorConfig.getTryToBeLeaderInterval(); + } else { + if (isLeader + && electorConfig.getElectorChangeListener() != null) { + electorConfig.getElectorChangeListener().leaderChanged(false); + } + + isLeader = false; + sleepTime = (electorConfig.getTryToBeLeaderInterval() * 2L + + random.nextInt(5)); Review Comment: ```suggestion sleepTime = electorConfig.getTryToBeLeaderInterval() * 2L + random.nextInt(5); ``` -- This is an automated message from the Apache Git Service. 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