作用：RBucket桶可存储任意对象，可在高并发场景下进行唯一更新。

示例：创建20个线程并发更新桶对象，只有一个执行了更新操作。

先添加redisson的依赖。

<dependency><groupId>org.redisson</groupId><artifactId>redisson</artifactId><version>3.20.0</version>
</dependency>

public static void main(String[] args) {Config config = new Config();config.useSingleServer().setAddress("redis://localhost:6379").setPassword("123456");RedissonClient client = Redisson.create(config);RCountDownLatch countDownLatch = client.getCountDownLatch("countDownLatch");countDownLatch.trySetCount(20);RBucket<String> bucket = client.getBucket("bucket");bucket.set("桶测试"+1);String oldValue=bucket.get();ExecutorService executorService= Executors.newFixedThreadPool(20);for (int i=0;i<20;i++){executorService.submit(() -> {System.out.println("线程:" + Thread.currentThread().getId() + ",桶:" + bucket.get());if (bucket.compareAndSet(oldValue, "桶测试 " + 2)) {System.out.println("线程" + Thread.currentThread().getId() + "更新了bucket的值");}countDownLatch.countDown();});}try {countDownLatch.await();}catch (Exception e){e.printStackTrace();}System.out.println("更新后的桶对象为："+bucket.get());executorService.shutdown();
}

接口文档：

public interface RBucket<V> extends RExpirable, RBucketAsync<V> {void set(V var1);                                  //设置桶存储的对象void set(V var1, long var2, TimeUnit var4);        //设置桶存储的对象，设置操作的超时时间var2boolean trySet(V var1);                            //尝试设置桶的新值boolean trySet(V var1, long var2, TimeUnit var4);  //尝试设置桶的新值，设置超时时间var2boolean compareAndSet(V var1, V var2);             //原子替换桶的新值为var2long size();                                       //桶存储对象的大小V get();                                           //返回桶存储的对象V getAndDelete();                                  //返回并删除桶存储的对象V getAndSet(V var1);                               //返回桶的旧值，设置新值V getAndSet(V var1, long var2, TimeUnit var4);     //返回桶的旧值，设置新值，设置操作的超时时间var2}