Redis实现消息队列-代码实现2

系统管理员 2023-10-10 12:52 62阅读 0赞

## Redis实现消息队列-代码实现   一、前言 ##

二、代码

项目结构图 ：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTc1OTg2_size_16_color_FFFFFF_t_70][]

pom.xml

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

application.yml

spring:
      application:
          name: yys-redismq
      redis:
        host: 127.0.0.1
        port: 6379
        password: 123456
        pool:
          max-active: 100
          max-idle: 10
          min-idle: 0
          max-wait: 100000
        timeout: 0
        database: 2
     
     
    server:
        port: 8081
        tomcat:
            uri-encoding: UTF-8

RedisConfig.java

package com.yys.demo.config;
     
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
    import org.springframework.data.redis.core.RedisTemplate;
    import org.springframework.data.redis.core.StringRedisTemplate;
    import redis.clients.jedis.JedisPoolConfig;
     
    /**
     * 描述：redis配置类
     * @author yys
     * @date 2019.03.15
     */
    @Configuration
    public class RedisConfig {
     
        /** redis 服务器地址 */
        @Value("${spring.redis.host}")
        private String host;
     
        /** redis 端口号 */
        @Value("${spring.redis.port}")
        private int port;
     
        /** redis 服务器密码 */
        @Value("${spring.redis.password}")
        private String password;
     
        /** redis 连接池最大连接数(使用负值无限制) */
        @Value("${spring.redis.pool.max-active}")
        private int maxActive;
     
        /** redis 连接池最大空闲数 */
        @Value("${spring.redis.pool.max-idle}")
        private int maxIdle;
     
        /** redis 连接池小空闲数 */
        @Value("${spring.redis.pool.min-idle}")
        private int minIdle;
     
        /** redis 连接池最大阻塞等待时间(负值无限制) */
        @Value("${spring.redis.pool.max-wait}")
        private int maxWait;
     
        /** redis 数据库索引(默认0) */
        @Value("${spring.redis.database}")
        private int database;
     
        /** redis 超时时间 */
        @Value("${spring.redis.timeout}")
        private int timeout;
     
     
        @Bean
        public JedisPoolConfig getRedisConfig(){
            JedisPoolConfig config = new JedisPoolConfig();
            config.setMaxTotal(maxActive);
            config.setMaxIdle(maxIdle);
            config.setMinIdle(minIdle);
            config.setMaxWaitMillis(maxWait);
            return config;
        }
     
        @Bean
        public JedisConnectionFactory getConnectionFactory() {
            JedisConnectionFactory factory = new JedisConnectionFactory();
            factory.setHostName(host);
            factory.setPort(port);
            factory.setPassword(password);
            factory.setDatabase(database);
            JedisPoolConfig config = getRedisConfig();
            factory.setPoolConfig(config);
            return factory;
        }
     
        @Bean
        public RedisTemplate<?, ?> getRedisTemplate() {
            JedisConnectionFactory factory = getConnectionFactory();
            RedisTemplate<?, ?> redisTemplate = new StringRedisTemplate(factory);
            return redisTemplate;
        }
     
    }

RedisClient.java

package com.yys.demo.config;
     
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.data.redis.core.RedisTemplate;
    import org.springframework.stereotype.Component;
    import org.springframework.util.CollectionUtils;
     
    import java.util.List;
    import java.util.Map;
    import java.util.Set;
    import java.util.concurrent.TimeUnit;
     
    /**
     * 描述：redis工具类(本配置类只有redis消息队列相关命令方法)
     * @author yys
     * @date 2019.03.15
     */
    @Component
    public class RedisClient {
     
        @Autowired
        private RedisTemplate<String, Object> redisTemplate;
     
     
        /** ---------------------------------- redis消息队列 ---------------------------------- */
        /**
         * 存值
         * @param key 键
         * @param value 值
         * @return
         */
        public boolean lpush(String key, Object value) {
            try {
                redisTemplate.opsForList().leftPush(key, value);
                return true;
            } catch (Exception e) {
                e.printStackTrace();
                return false;
            }
        }
     
        /**
         * 取值 - <rpop：非阻塞式>
         * @param key 键
         * @return
         */
        public Object rpop(String key) {
            try {
                return redisTemplate.opsForList().rightPop(key);
            } catch (Exception e) {
                e.printStackTrace();
                return null;
            }
        }
     
        /**
         * 取值 - <brpop：阻塞式> - 推荐使用
         * @param key 键
         * @param timeout 超时时间
         * @param timeUnit 给定单元粒度的时间段
         *                 TimeUnit.DAYS          //天
         *                 TimeUnit.HOURS         //小时
         *                 TimeUnit.MINUTES       //分钟
         *                 TimeUnit.SECONDS       //秒
         *                 TimeUnit.MILLISECONDS  //毫秒
         * @return
         */
        public Object brpop(String key, long timeout, TimeUnit timeUnit) {
            try {
                return redisTemplate.opsForList().rightPop(key, timeout, TimeUnit.SECONDS);
            } catch (Exception e) {
                e.printStackTrace();
                return null;
            }
        }
     
        /**
         * 查看值
         * @param key 键
         * @param start 开始
         * @param end 结束 0 到 -1代表所有值
         * @return
         */
        public List<Object> lrange(String key, long start, long end) {
            try {
                return redisTemplate.opsForList().range(key, start, end);
            } catch (Exception e) {
                e.printStackTrace();
                return null;
            }
        }
     
        /** ---------------------------------- redis消息队列 ---------------------------------- */
     
    }

RedisProducerController.java

package com.yys.demo.controller;
     
    import com.yys.demo.config.RedisClient;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
     
    import java.util.Arrays;
    import java.util.List;
     
    /**
     * 描述：生产者(消息发送方)
     * @author yys
     * @date 2019.03.15
     */
    @RestController
    @RequestMapping("/producer")
    public class RedisProducerController {
     
        @Autowired
        RedisClient redisClient;
     
        /** 公共配置 */
        private final static String SUCCESS = "success";
        private final static String MESSAGE = "testmq";
        private static final List<String> list;
     
        static {
            list = Arrays.asList(new String[]{"猿医生", "CD", "yys"});
        }
     
        /**
         * 消息发送API
         * @return
         */
        @RequestMapping("/sendMessage")
        public String sendMessage() {
            for (String message : list) {
                redisClient.lpush(MESSAGE, message);
            }
            return SUCCESS;
        }
     
    }

RedisConsumerController.java

package com.yys.demo.controller;
     
    import com.yys.demo.config.RedisClient;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
     
    import java.util.concurrent.TimeUnit;
     
    /**
     * 描述：消费者(消息接收方)
     * @author yys
     * @date 2019.03.15
     */
    @RestController
    @RequestMapping("/consumer")
    public class RedisConsumerController {
     
        @Autowired
        RedisClient redisClient;
     
        /** 公共配置 */
        private final static String MESSAGE = "testmq";
     
        /**
         * 接收消息API
         * @return
         */
        @RequestMapping("/receiveMessage")
        public String sendMessage() {
            return (String) redisClient.brpop(MESSAGE, 0, TimeUnit.SECONDS);
        }
     
    }

三、测试

①、消费者(消息接收方)：发送请求等待接收消息

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTc1OTg2_size_16_color_FFFFFF_t_70 1][]

②、生产者(消息发送方)：发送请求发送消息

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTc1OTg2_size_16_color_FFFFFF_t_70 2][]

③、回到消费者(消息接收方)：可以看到已接收消息成功

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTc1OTg2_size_16_color_FFFFFF_t_70 3][]

④、redis客户端再次验证：<猿医生>消息已成功被消费掉，验证成功。

![20190315173411529.png][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTc1OTg2_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20190315162656554.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTc1OTg2,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTc1OTg2_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20190315173319711.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTc1OTg2,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTc1OTg2_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20190315173334344.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTc1OTg2,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTc1OTg2_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20190315173351260.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyMTc1OTg2,size_16,color_FFFFFF,t_70
[20190315173411529.png]: https://img-blog.csdnimg.cn/20190315173411529.png