十四、curator recipes之DistributedAtomicLong

简介

和Java的AtomicLong没有太大的不同DistributedAtomicLong旨在分布式场景中维护一个Long类型的数据，你可以像普通单机环境一样来使用它。

官方文档：http://curator.apache.org/curator-recipes/distributed-atomic-long.html

javaDoc：http://curator.apache.org/apidocs/org/apache/curator/framework/recipes/atomic/DistributedAtomicLong.html

代码示例

import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.recipes.atomic.AtomicValue;
import org.apache.curator.framework.recipes.atomic.DistributedAtomicLong;
import org.apache.curator.retry.ExponentialBackoffRetry;

public class DistributedAtomicLongDemo {
    private static CuratorFramework client = CuratorFrameworkFactory.newClient("localhost:2181", new ExponentialBackoffRetry(3000, 2));
    private static String path = "/atomic/long/0001";
    private static DistributedAtomicLong atomicLong = new DistributedAtomicLong(client, path, new ExponentialBackoffRetry(1000, 1));
    static {
        client.start();
    }

    public static void main(String[] args) throws Exception {
        System.out.println(atomicLong.get().postValue());
        atomicLong.increment();
        System.out.println(atomicLong.get().postValue());
        atomicLong.decrement();
        System.out.println(atomicLong.get().postValue());
        AtomicValue<Long> newAtomicLong = atomicLong.compareAndSet(0L, 10L);
        System.out.println(newAtomicLong.succeeded());
        System.out.println(newAtomicLong.preValue());
        System.out.println(newAtomicLong.postValue());
        System.out.println(atomicLong.get().postValue());
        System.out.println(atomicLong.subtract(5L).postValue());
        Thread.sleep(50000);
        client.close();
    }
}