redis分布式锁(二)--redisson
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
代码下载:https://github.com/wanun/redis-lock