[大数据]ZK分布式锁框架curator简单案例

1.引入依赖

 <!--zookeeper-->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.5.7</version>
        </dependency>
        <!--curator-->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>4.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>4.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-client</artifactId>
            <version>4.3.0</version>
        </dependency>

2.获取连接实例方法

 public static CuratorFramework getCuratorFramework(){
        //创建连接实例
        CuratorFramework client = CuratorFrameworkFactory.builder().connectString("ZK地址:2182")
                .connectionTimeoutMs(50000)
                .sessionTimeoutMs(50000)
                .retryPolicy(new ExponentialBackoffRetry(50000,3)).build();
        client.start();
        System.out.println("zookeeper 客户端启动成功了");
        return client;
    }

3.使用

 public static void main(String[] args) {

        // 创建分布式锁1
        InterProcessMutex lock1 = new InterProcessMutex(getCuratorFramework(), "/locks");

        // 创建分布式锁2
        InterProcessMutex lock2 = new InterProcessMutex(getCuratorFramework(), "/locks");

        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    //获取锁    
                    lock1.acquire();
                    System.out.println("线程1 获取到锁");

                    Thread.sleep(5000);

                    //释放锁
                    lock1.release();
                    System.out.println("线程1 释放锁");
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }).start();

        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    //获取锁
                    lock2.acquire();
                    System.out.println("线程2 获取到锁");

                    Thread.sleep(5000);

                    //释放锁
                    lock2.release();
                    System.out.println("线程2 释放锁");
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }).start();
    }

4.测试

线程2 获取到锁
线程2 释放锁
线程1 获取到锁
线程1 释放锁