zookeeper 批量获取锁 高性能 代码

以下是一个使用Zookeeper实现批量获取锁的高性能代码示例：

import org.apache.zookeeper.*;
import org.apache.zookeeper.data.Stat;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;

public class ZookeeperLock {
    private static final String ZOOKEEPER_SERVER = "localhost:2181";
    private static final int CONNECTION_TIMEOUT = 5000;
    private static final String LOCK_ROOT = "/locks";
    private static final String LOCK_PREFIX = "lock_";
    private List<ZooKeeper> zooKeeperList = new ArrayList<>();
    private List<String> lockPaths = new ArrayList<>();

    public void acquireLocks(int numLocks) throws Exception {
        CountDownLatch latch = new CountDownLatch(numLocks);
        for (int i = 0; i < numLocks; i++) {
            ZooKeeper zooKeeper = new ZooKeeper(ZOOKEEPER_SERVER, CONNECTION_TIMEOUT, null);
            zooKeeperList.add(zooKeeper);

            String lockPath = zooKeeper.create(LOCK_ROOT + "/" + LOCK_PREFIX, new byte[0], ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.EPHEMERAL_SEQUENTIAL);
            lockPaths.add(lockPath);

            zooKeeper.exists(lockPath, new Watcher() {
                @Override
                public void process(WatchedEvent event) {
                    if (event.getType() == Event.EventType.NodeDeleted) {
                        latch.countDown();
                    }
                }
            });
        }

        latch.await(); // 等待所有锁都释放

        // 所有锁都已释放，可以进行后续操作
        System.out.println("All locks have been released.");
    }

    public void releaseLocks() {
        for (int i = 0; i < zooKeeperList.size(); i++) {
            ZooKeeper zooKeeper = zooKeeperList.get(i);
            String lockPath = lockPaths.get(i);
            try {
                Stat stat = zooKeeper.exists(lockPath, false);
                if (stat != null) {
                    zooKeeper.delete(lockPath, -1);
                }
                zooKeeper.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    public static void main(String[] args) {
        ZookeeperLock zookeeperLock = new ZookeeperLock();
        try {
            // 获取5个锁
            zookeeperLock.acquireLocks(5);

            // 进行需要加锁的操作
            System.out.println("Performing locked operation...");

            // 模拟操作时间
            Thread.sleep(5000);

            // 释放锁
            zookeeperLock.releaseLocks();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

这个代码示例使用Zookeeper的临时顺序节点来实现锁的获取和释放。在acquireLocks方法中，它会创建指定数量的临时顺序节点，并监听节点删除事件，当节点被删除时，表示锁已释放，计数器减一。在releaseLocks方法中，它会删除所有创建的节点，并关闭ZooKeeper连接。

使用这个代码示例，你可以通过调用acquireLocks方法来批量获取指定数量的锁，然后进行需要加锁的操作，最后调用releaseLocks方法释放锁