springboot干货——（十三【三】）整合redis实现消息队列

女爷i 2021-09-26 13:14 512阅读 0赞

redis除了作为一般的nosql数据存储之外，还能实现简单的消息队列的功能。

存储功能可以参考我的上篇博客：[springboot整合redis][springboot_redis]

**项目结构**

![SouthEast][]

1.pom.xml如下

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    	<modelVersion>4.0.0</modelVersion>
    
    	<groupId>com.gwd</groupId>
    	<artifactId>springboot-redis-provider_reciver</artifactId>
    	<version>0.0.1-SNAPSHOT</version>
    	<packaging>jar</packaging>
    
    	<name>springboot-redis-provider_reciver</name>
    	<description>Demo project for springboot-provider_reciver</description>
    
    	<parent>
    		<groupId>org.springframework.boot</groupId>
    		<artifactId>spring-boot-starter-parent</artifactId>
    		<version>2.0.0.RELEASE</version>
    		<relativePath/> 
    	</parent>
    
    	<properties>
    		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    		<java.version>1.8</java.version>
    	</properties>
    
    	<dependencies>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-data-redis</artifactId>
    		</dependency>
    		<dependency>
    		    <groupId>org.springframework.boot</groupId>
    		    <artifactId>spring-boot-starter-web</artifactId>
    		</dependency>
    		<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-test</artifactId>
    			<scope>test</scope>
    		</dependency>
    	</dependencies>
    
    	<build>
    		<plugins>
    			<plugin>
    				<groupId>org.springframework.boot</groupId>
    				<artifactId>spring-boot-maven-plugin</artifactId>
    			</plugin>
    		</plugins>
    	</build>
    </project>

2.properties文件

# REDIS (RedisProperties)
    # Redis数据库索引（默认为0）
    spring.redis.database=0
    # Redis服务器地址
    spring.redis.host=192.168.30.103
    # Redis服务器连接端口
    spring.redis.port=6379
    # Redis服务器连接密码（默认为空）
    spring.redis.password=
    # 连接池最大连接数（使用负值表示没有限制）
    spring.redis.jedis.pool.max-active=8
    # 连接池最大阻塞等待时间（使用负值表示没有限制）
    spring.redis.jedis.pool.max-wait=-1
    # 连接池中的最大空闲连接
    spring.redis.jedis.pool.max-idle=8
    # 连接池中的最小空闲连接
    spring.redis.jedis.pool.min-idle=0
    # 连接超时时间（毫秒）
    spring.redis.timeout=5000
    
    server.port=8088

3.Receiver.java

package com.gwd.config;
    
    import java.util.concurrent.CountDownLatch;
    
    import org.springframework.beans.factory.annotation.Autowired;
    
    /** 
    * @FileName Receiver.java
    * @Description:TODO
    * @author JackHisen(gu.weidong)
    * @version V1.0
    * @createtime 2018年3月16日 下午4:44:08 
    * 修改历史：
    * 时间           作者          版本        描述
    *====================================================  
    *
    */
    public class Receiver {
    	private CountDownLatch latch;
    
        @Autowired
        public Receiver(CountDownLatch latch) {
            this.latch = latch;
        }
    
        public void receiveMessage(String message) {
            System.out.println("Received <" + message + ">");
            latch.countDown();
        }
    }

4.启动类

package com.gwd;
    
    import java.util.concurrent.CountDownLatch;
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.context.annotation.Bean;
    import org.springframework.data.redis.connection.RedisConnectionFactory;
    import org.springframework.data.redis.core.StringRedisTemplate;
    import org.springframework.data.redis.listener.PatternTopic;
    import org.springframework.data.redis.listener.RedisMessageListenerContainer;
    import org.springframework.data.redis.listener.adapter.MessageListenerAdapter;
    
    import com.gwd.config.Receiver;
    
    @SpringBootApplication
    public class SpringbootRedisReciverApplication {
    
    	@Bean
    	Receiver receiver(CountDownLatch latch) {
    	return new Receiver(latch);
    	}
    	 
    	//必要的redis消息队列连接工厂
    	@Bean
    	CountDownLatch latch() {
    	return new CountDownLatch(1);
    	}
    	 
    	//redis模板
    	@Bean
    	StringRedisTemplate template(RedisConnectionFactory connectionFactory) {
    	return new StringRedisTemplate(connectionFactory);
    	}
    	 
    	//注入消息监听器容器
    	@Bean
    	RedisMessageListenerContainer container(RedisConnectionFactory connectionFactory,MessageListenerAdapter listenerAdapter) {
    	RedisMessageListenerContainer container = new RedisMessageListenerContainer();
    	container.setConnectionFactory(connectionFactory);
    	container.addMessageListener(listenerAdapter, new PatternTopic("msg"));
    	return container;
    	}
    	 
    	//注入消息监听器容器
    	@Bean
    	MessageListenerAdapter listenerAdapter(Receiver receiver) {
    	return new MessageListenerAdapter(receiver, "receiveMessage");
    	}
    	
    	
    	public static void main(String[] args) {
    		SpringApplication.run(SpringbootRedisReciverApplication.class, args);
    	}
    }

5.controller

package com.gwd.controller;
    
    import java.util.concurrent.CountDownLatch;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.data.redis.core.StringRedisTemplate;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.ResponseBody;
    import org.springframework.web.bind.annotation.RestController;
    
    /** 
    * @FileName TestController.java
    * @Description:TODO
    * @author JackHisen(gu.weidong)
    * @version V1.0
    * @createtime 2018年3月16日 下午5:47:20 
    * 修改历史：
    * 时间           作者          版本        描述
    *====================================================  
    *
    */
    @RestController
    public class TestController {
    	@Autowired
    	CountDownLatch latch;
    	@Autowired
    	StringRedisTemplate template;
    	
    	@RequestMapping("/testProvider")
    	@ResponseBody
    	public String testProvider() {
    		System.out.println("我要发送消息咯...");
    		template.convertAndSend("msg", "欢迎使用redis的消息队列!");
    		try {
    		//发送消息连接等待中
    			System.out.println("消息正在发送...");
    		latch.await();
    		} catch (InterruptedException e) {
    			System.out.println("消息发送失败...");
    		}
    		return null;
    	}
    }

6.测试结果：

![SouthEast 1][]

**注意：配置文件中设置连接超时时间spring.redis.timeout不要为0，否则会报：**

org.springframework.dao.QueryTimeoutException: Redis command timed out; nested exception is io.lettuce.core.RedisCommandTimeoutException: Command timed out

[springboot_redis]: http://blog.csdn.net/gwd1154978352/article/details/79345957
[SouthEast]: /images/20210923/0f798535aad844d3b9d45aa335f87ec9.png
[SouthEast 1]: /images/20210923/9db8769b3a814117a930c064db3e8511.png