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Redis集群利用Redisson實(shí)現(xiàn)分布式鎖方式

更新時(shí)間：2024年05月15日 16:46:51 作者：-luking-

這篇文章主要介紹了Redis集群利用Redisson實(shí)現(xiàn)分布式鎖方式,具有很好的參考價(jià)值,希望對大家有所幫助,如有錯(cuò)誤或未考慮完全的地方,望不吝賜教

引入依賴

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.8.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.lk</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        //Redis起步依賴
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
            <version>2.1.7.RELEASE</version>
        </dependency>
        //Redisson起步依賴
        <dependency>
            <groupId>org.redisson</groupId>
            <artifactId>redisson-spring-boot-starter</artifactId>
            <version>3.11.2</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.48</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

Redisson配置類

package com.lk.demo.redissionconfig;

import org.redisson.Redisson;
import org.redisson.api.RedissonClient;
import org.redisson.config.Config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/*
* Redisson的配置類，提供RedissonClient實(shí)例
* */
@Configuration
public class RedissionConfiguration {

    @Bean
    public RedissonClient getRedissionClient(){
        Config config=new Config();
        //集群模式,集群節(jié)點(diǎn)的地址須使用“redis://”前綴，否則將會(huì)報(bào)錯(cuò)。
        //此例集群為3節(jié)點(diǎn)，各節(jié)點(diǎn)1主1從
        config.useClusterServers().addNodeAddress("redis://192.168.37.134:7001","redis://192.168.37.134:7002",
                "redis://192.168.37.134:7003","redis://192.168.37.134:7004","redis://192.168.37.134:7005","redis://192.168.37.134:7006");
        return Redisson.create(config);
    }
}

分布式鎖

package com.lk.demo.redissionconfig;

import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Repository;


import java.util.concurrent.TimeUnit;

/*
* 利用RedissonClient部署及解除分布式鎖
* 直接調(diào)用lock、unlock方法，此方法只允許1個(gè)線程取得鎖，其余線程將自旋等待
* */

@Repository
public class HandlerLock{
    @Autowired
    private RedisTemplate<String,String> rt;
    //@Qualifier("redisson") //在org.redisson.spring.starter包中，可以從配置文件讀取redis配置，并返回redissonclient對象
    @Qualifier("getRedissionClient")//指定從本地自寫的class中取得實(shí)例
    @Autowired
    private RedissonClient redissonClient;
    //實(shí)驗(yàn)方法，測試分布式鎖
    public void doLock(String lockname){
        //從RedissonClient取得Rlock實(shí)例
        RLock rlock=redissonClient.getLock(lockname);
        //嘗試取鎖，有效期為3s，到期后自動(dòng)釋放。如果取得鎖繼續(xù)執(zhí)行。取鎖失敗則自旋。
        //亦可使用rlock.tryLock（）方法，此方法也為嘗試取鎖，并返回boolean結(jié)果
        rlock.lock(3,TimeUnit.SECONDS);
        //以下為測試業(yè)務(wù)代碼，
        System.out.println(Thread.currentThread().getName()+"取得鎖");
        int store=Integer.valueOf(rt.opsForValue().get("store"));
        if(store>0)
        {
            System.out.printf("售出1,當(dāng)前庫存為%d\n",--store);
            rt.opsForValue().set("store",String.valueOf(store));
        }else
            System.out.println("已售完，下次再來吧");
        //業(yè)務(wù)完成，釋放鎖
        rlock.unlock();
        System.out.println("解鎖");
    }
}

測試Controller

@Controller
public class Controllerdemo {
    @Autowired
    private HandlerLock handlerLock;
    @RequestMapping("/hello")
    @ResponseBody
    public void demo(){
        handlerLock.doLock("luking");
    }

}