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apache curator怎麼操作zookeeper

王林
王林轉載
2021-01-12 10:23:491742瀏覽

apache curator怎麼操作zookeeper

apache curator怎麼操作zookeeper?

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首先來簡單介紹下apache curator。

Apache Curator是Apache ZooKeeper的Java / JVM客戶端函式庫,Apache ZooKeeper是一種分散式協調服務。它包括一個高級API框架和實用程序,使Apache ZooKeeper更容易和更可靠。它還包括常見用例和擴充功能(如服務發現和Java 8非同步DSL)的配方。

官網:http://curator.apache.org/index.html

Curator專案元件(下載官方原始碼就可以看到以下元件)

apache curator怎麼操作zookeeper

Maven依賴(網址:https://search.maven.org/search?q=org.apache.curator)

apache curator怎麼操作zookeeper

##分散式鎖定實現

<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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