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apache curator怎么操作zookeeper?
(学习视频分享:编程视频)
首先来简单介绍下apache curator。
Apache Curator是Apache ZooKeeper的Java / JVM客户端库,Apache ZooKeeper是一种分布式协调服务。它包括一个高级API框架和实用程序,使Apache ZooKeeper更容易和更可靠。它还包括常见用例和扩展(如服务发现和Java 8异步DSL)的配方。
官网:http://curator.apache.org/index.html
Curator项目组件(下载官方源码就可以看到以下组件)
Maven依赖(地址:https://search.maven.org/search?q=org.apache.curator)
分布式锁实现
<dependency> <groupId>org.apache.curator</groupId> <artifactId>curator-recipes</artifactId> <version>4.1.0</version> </dependency>
public static void main(String[] args) { String zookeeperConnectionString = "localhost:2181"; RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 3); CuratorFramework client = CuratorFrameworkFactory.newClient(zookeeperConnectionString, retryPolicy); client.start(); try { //创建分布式锁, 锁空间的根节点路径为/curator/lock InterProcessMutex lock = new InterProcessMutex(client, "/curator/lock"); if ( lock.acquire(1000, TimeUnit.SECONDS) ) { try { // do some work inside of the critical section here System.out.println("do some work inside of the critical section here"); } finally { //完成业务流程, 释放锁 lock.release(); } } } catch (Exception e) { e.printStackTrace(); } }
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