redisson -- 延迟队列RDelayedQueue

1.maven配置

<!-- 用于管理起步工程的依赖管理 -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.11</version>
        <relativePath/> 
    </parent>
<dependencies>
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>5.8.2</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>

        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-pool2</artifactId>
            <version>2.6.2</version>
        </dependency>

        <dependency>
            <groupId>org.redisson</groupId>
            <artifactId>redisson-spring-boot-starter</artifactId>
            <version>3.10.6</version>
        </dependency>
</dependencies>

2.yml配置

server:
  port: 9007
  servlet:
    context-path: /


spring:
  redis:
    # 超时时间
    timeout: 10000ms
    # 服务器地址
    host: 127.0.0.1
    # 服务器端口
    port: 6379
    # 数据库
    database: 0
    # 密码
    password: 123456

    lettuce:
      pool:
        # 最大连接数，默认8
        max-active: 1024
        # 最大连接阻塞等待时间，默认-1
        max-wait: 10000ms
        # 最大空闲连接
        max-idle: 200
        # 最小空闲连接
        min-idle: 5

3.config

import org.redisson.api.RedissonClient;
import org.redisson.config.Config;
import org.redisson.config.SingleServerConfig;
import org.springframework.context.annotation.Bean;
import org.springframework.boot.autoconfigure.data.redis.RedisProperties;

public class RedissonConfig {

    @Bean(destroyMethod = "shutdown")
    public RedissonClient redissonClient(RedisProperties redisProperties){
        Config config = new Config();
        SingleServerConfig singleServerConfig = config.useSingleServer();
        singleServerConfig.setAddress("redis://" + redisProperties.getHost() + ":" + redisProperties.getPort());
        singleServerConfig.setPassword(redisProperties.getPassword());
        singleServerConfig.setKeepAlive(true);

        // 根据config创建出RedissonClient实例
        RedissonClient redissonClient = Redisson.create(config);
        return redissonClient;
    }

}

4.service

public void delayed() throws InterruptedException {

        // 阻塞队列：RBlockingDeque的实现类为:new RedissonBlockingDeque
        RBlockingDeque<String> blockingDeque = redissonClient.getBlockingDeque("delayedQueue");
        // 获取延迟队列
        RDelayedQueue<String> delayedQueue = redissonClient.getDelayedQueue(blockingDeque);

        System.out.println(LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")) + "添加任务到延时队列里面");

        // 添加延迟任务
        delayedQueue.offer( "task1第一个任务", 6, TimeUnit.SECONDS);
        delayedQueue.offer( "task2第二个任务", 4, TimeUnit.SECONDS);

        System.out.println("--------------------Begin");
        // 通过 take 方法等待并获取到期的任务
        while (true) {
            String task = blockingDeque.take();
            System.out.println(LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")) + "延时队列收到:" + task);
        }

    }

5.结果