redisson使用方式(springboot整合redisson)
项目结构：
1.引入pom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 http://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>2.1.4.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.springbootredisson</groupId> <artifactId>springboot-redissson</artifactId> <version>1.0-SNAPSHOT</version> <name>springboot-redissson</name> <!-- FIXME change it to the project's website --> <url>http://www.example.com</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.7</maven.compiler.source> <maven.compiler.target>1.7</maven.compiler.target> </properties> <dependencies> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>test</scope> </dependency> <!--springboot--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <exclusions> <exclusion> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> </exclusion> </exclusions> </dependency> <!--整合redis--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <!--整合redisson--> <dependency> <groupId>org.redisson</groupId> <artifactId>redisson-spring-boot-starter</artifactId> <version>3.11.2</version> <exclusions> <exclusion> <groupId>org.redisson</groupId> <artifactId>redisson-spring-data</artifactId> </exclusion> </exclusions> </dependency> <!--切面--> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjrt</artifactId> <version>1.9.4</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.9.2</version> </dependency> <!--lombok--> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> </dependencies> <build> <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) --> <plugins> <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle --> <plugin> <artifactId>maven-clean-plugin</artifactId> <version>3.1.0</version> </plugin> <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging --> <plugin> <artifactId>maven-resources-plugin</artifactId> <version>3.0.2</version> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.0</version> </plugin> <plugin> <artifactId>maven-surefire-plugin</artifactId> <version>2.22.1</version> </plugin> <plugin> <artifactId>maven-jar-plugin</artifactId> <version>3.0.2</version> </plugin> <plugin> <artifactId>maven-install-plugin</artifactId> <version>2.5.2</version> </plugin> <plugin> <artifactId>maven-deploy-plugin</artifactId> <version>2.8.2</version> </plugin> <!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle --> <plugin> <artifactId>maven-site-plugin</artifactId> <version>3.7.1</version> </plugin> </plugins> </pluginManagement> </build> </project>
2.application配置
application.yml
server:
port: 8012
spring:
profiles:
active: "local"
#active: "dev"
#active: "prod"
# active: "test"
application-local.yml：
spring:
redis:
database: 0
host: 127.0.0.1
port: 6379
password: 123
timeout: 1000ms
jedis:
pool:
max-idle: 8
max-wait: -1ms
min-idle: 0
max-active: 8
3.启动类：Application
package com.springbootredisson;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.annotation.EnableScheduling;
@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})
@EnableScheduling
@EnableAsync
@EnableAspectJAutoProxy(proxyTargetClass=true, exposeProxy=true)
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
System.out.println("--启动成功--");
}
}
4.测试类：ResissonTestController
package com.springbootredisson; import lombok.extern.slf4j.Slf4j; import org.redisson.api.RLock; import org.redisson.api.RedissonClient; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; /** * Created by Administrator on 2022/11/30. */ @RestController @RequestMapping("/redisson") @Slf4j public class ResissonTestController { @Autowired private RedissonClient redissonClient; @Value("${server.port}") private String port; @PostMapping("/test") public void addEquipmentAccount(){ RLock rLock = redissonClient.getLock("test"); String threadIdAndName = Thread.currentThread().getId() + "===" +Thread.currentThread().getName(); log.info(threadIdAndName + "开始获取锁"); // lock加锁代码写在try catch外面，防止加锁异常再走解锁引发解锁异常。 rLock.lock(); // 加锁成功后，每10秒续命一次，查看redisClient客户端可以看到key为test的过期时间TTL，每到剩余20秒的时候变成30秒。 log.info(threadIdAndName + "加锁成功"); System.out.println("端口号：" + port); try { if("8011".equals(port)){ log.info(threadIdAndName + "睡眠15s"); Thread.sleep(15000); // 模拟端口8011异常。 int i = 1/0; }else{ log.info(threadIdAndName + "睡眠30s"); Thread.sleep(30000); } }catch (Exception e){ e.printStackTrace(); }finally { /** * 1.程序异常，锁会一直续命，出现死锁。需要在finally中手动释放锁。 * 2.宕机，模拟宕机停掉服务。锁会在默认30秒后过期自动释放。不会出现死锁。 * 结论：异常需要在finally中手动释放锁。宕机不会引发死锁。 */ // 手动释放锁 if(null != rLock && rLock.isLocked() && rLock.isHeldByCurrentThread()){ rLock.unlock(); log.info(threadIdAndName + "手动释放锁成功"); } } } }
怎么一直阻塞直到获取锁？
参考：https://blog.csdn.net/weixin_48921808/article/details/119918734
redisson是不是所有锁都会用看门狗机制？哪些加锁方法会用看门狗机制？
参考：https://blog.csdn.net/m0_45364328/article/details/125175796
