使用Redisson 分布式锁
application.yml
##端口号
server.port=8001
# Redis数据库索引(默认为0)
spring.redis.database=0
# Redis服务器地址
spring.redis.host=localhost
# 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.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.pool.max-wait=-1
# 连接池中的最大空闲连接
spring.redis.pool.max-idle=8
# 连接池中的最小空闲连接
spring.redis.pool.min-idle=0
# 连接超时时间(毫秒)
spring.redis.timeout=300
POM.xml 增加Redisson相关依赖
<?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>2.2.6.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.wanjun.redis</groupId>
<artifactId>redis-lock</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>redis-lock</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-starter-data-redis</artifactId>
</dependency>
<dependency>
<groupId>org.redisson</groupId>
<artifactId>redisson</artifactId>
<version>3.12.5</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
启动类
@SpringBootApplication
public class RedisLockApplication {
public static void main(String[] args) {
SpringApplication.run(RedisLockApplication.class, args);
}
@Bean
public RedissonClient getRedisClient() {
Config config = new Config();
config.useSingleServer().setAddress("redis://127.0.0.1:6379").setDatabase(0);
return Redisson.create(config);
}
}
StockController.java
改为使用redisson锁
@RestController
public class StockController {
@Autowired
private StringRedisTemplate stringRedisTemplate;
@Autowired
private RedissonClient redisson;
@RequestMapping("/deduct_stock")
public String decuctStock() throws Exception {
String stockLock = "stockLock";
RLock redissLock = redisson.getLock(stockLock);
try {
redissLock.lock();
int stock = Integer.parseInt(stringRedisTemplate.opsForValue().get("stock"));
if (stock > 0) {int realStock = stock - 1;
stringRedisTemplate.opsForValue().set("stock", realStock + "");
System.out.println("扣减成功,剩余库存:" + realStock);
} else {
System.out.println("扣减失败,库存不足");
}
} finally {
redissLock.unlock();
}
return "success";
}
}
依次启动项目 端口 8001,8002