2024年大数据最全ZooKeeper分布式锁，2024年最新从草根到百万年薪程序员的十年风雨之路

    package com.test;
    
    
    import org.apache.commons.lang3.ArrayUtils;
    import org.apache.commons.lang3.StringUtils;
    import org.apache.zookeeper.*;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    
    import java.util.Arrays;
    import java.util.Collections;
    import java.util.List;
    import java.util.concurrent.TimeUnit;
    import java.util.concurrent.locks.Condition;
    import java.util.concurrent.locks.Lock;
    import java.util.stream.Collectors;
    
    public class ZookeeperLock implements Lock {
    
    private static ThreadLocal<String> lockNodePathThreadLocal = new ThreadLocal<>();
    private final ZooKeeper zooKeeper;
    private final String basePath;
    private final String lockName;
    private final String pathSeparator = "/";
    private Logger logger = LoggerFactory.getLogger(getClass());
    
    
    public ZookeeperLock(ZooKeeper zooKeeper, String basePath, String lockName) {
        this.zooKeeper = zooKeeper;
        this.basePath = basePath;
        this.lockName = lockName;
        checkLockName(lockName);
        checkBasePath(basePath);
        createBasePathIfNecessary(zooKeeper, basePath);
    }
    
    private void checkLockName(String lockName) {
        if(lockName.contains(pathSeparator))
            throw new RuntimeException("invalid lock name, lock name should not contains " + pathSeparator);
    }
    
    private void checkBasePath(String basePath) {
        if(!basePath.startsWith(pathSeparator))
            throw new RuntimeException("base path must starts with " + pathSeparator);
        if(!basePath.equals(pathSeparator) && basePath.endsWith("/"))
            throw new RuntimeException("base path should not ends with " + pathSeparator);
    }
    
    private void createBasePathIfNecessary(ZooKeeper zooKeeper, String basePath) {
        try {
            String[] nodeNamesInBasePath = Arrays.stream(basePath.split(pathSeparator)).filter(s -> StringUtils.isNotBlank(s)).collect(Collectors.toList()).toArray(new String[0]);
            boolean needCreate = false;
            for (int i = 0; i < nodeNamesInBasePath.length; i++) {
                String[] nodeNames = ArrayUtils.subarray(nodeNamesInBasePath, 0, i + 1);
                String path = pathSeparator + StringUtils.join(nodeNames, pathSeparator);
                if (needCreate || zooKeeper.exists(path, false) == null) {
                    needCreate = true;
                    zooKeeper.create(path, null, ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT);
                }
            }
        } catch (Exception e) {
            throw new RuntimeException("create zookeeper base dir for lock failed!", e);
        }
    }
    
    
    @Override
    public void lock() {
        while (true) {
            try {
                lockInterruptibly();
                return;
            } catch (InterruptedException e) {
                logger.debug(e.getMessage(), e);
            } catch (RuntimeException e) {
                throw e;
            }
        }
    }
    
    @Override
    public void lockInterruptibly() throws InterruptedException {
        lockInterruptiblyInternal(0, null);
    }
    
    @Override
    public boolean tryLock(long time, TimeUnit unit) throws InterruptedException {
        lockInterruptiblyInternal(time, unit);
        return true;
    }
    
    @Override
    public boolean tryLock() {
        try {
            String lockNodePath = createLockNode();
            if (getLockNodePaths().indexOf(lockNodePath) == 0)
                return true;
            removeLockNode();
            return false;
        } catch (InterruptedException e) {
            logger.debug(e.getMessage(), e);
            return false;
        } catch (KeeperException e) {
            throw new RuntimeException(e);
        }
    }
    
    @Override
    public void unlock() {
        try {
            removeLockNode();
        } catch (KeeperException e) {
            throw new RuntimeException(e);
        } catch (InterruptedException e) {
            throw new RuntimeException(e);
        }
    }
    
    @Override
    public Condition newCondition() {
        throw new UnsupportedOperationException();
    }
    
    private void lockInterruptiblyInternal(long time, TimeUnit unit) throws InterruptedException {
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