springboot干货——（十三【二】）整合redis实现消息队列

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

项目结构



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/> <!-- lookup parent from repository -->
</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：



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