Zookeeper Springboot+curator 实现分布式锁

1 原理

2 工程

2.1 pom

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>


    <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-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.71</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-collections4</artifactId>
            <version>4.2</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
        </dependency>
        <!--日志-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-logging</artifactId>
        </dependency>

        <!--zk-->
        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.5.9</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.curator/curator-recipes -->
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>5.0.0</version>
            <exclusions>
                <exclusion>
                    <groupId>org.apache.zookeeper</groupId>
                    <artifactId>zookeeper</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

    </dependencies>


    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.3.0.RELEASE</version>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

2.2 application.yml

server:
  port: 8000


zookeeper:
  address: 192.168.38.80:2181

2.3 ZookeeperConfig

@Configuration
public class ZookeeperConfig {
     


    @Value("${zookeeper.address}")
    private String address;


    @Bean(initMethod = "start")
    public CuratorFramework curatorFramework() {
     
        RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 3);
        return CuratorFrameworkFactory.newClient(address, retryPolicy);
    }


}

2.4 ZookeeperService

@Service
public class ZookeeperService {
     


    @Autowired
    private CuratorFramework curatorFramework;

    private static final Integer threadSize = 50;


    private static Integer number = 0;


    public Integer getNumber() throws InterruptedException {
     


        CountDownLatch countDownLatch = new CountDownLatch(threadSize);

        for (int i = 1; i <= threadSize; i++) {
     
            new Thread(() -> {
     
                InterProcessMutex interProcessMutex = new InterProcessMutex(curatorFramework, "/lock_");
                try {
     
                    interProcessMutex.acquire();
                    for (int j = 1; j <= 100; j++) {
     
                        number++;
                    }
                    System.out.println(Thread.currentThread().getName() + "->" + number);
                    countDownLatch.countDown();
                } catch (Exception e) {
     
                    e.printStackTrace();
                } finally {
     
                    try {
     
                        interProcessMutex.release();
                    } catch (Exception e) {
     
                        e.printStackTrace();
                    }

                }
            }, "t" + i).start();
        }

        countDownLatch.await();

        return number;
    }


}

2.5 ZookeeperApplication

@SpringBootApplication
public class ZookeeperApplication {
     


    public static void main(String[] args) {
     
        SpringApplication.run(ZookeeperApplication.class);
    }


}

2.6 测试

@RunWith(SpringRunner.class)
@SpringBootTest(classes = ZookeeperApplication.class)
public class MainTest {
     


    @Autowired
    private ZookeeperService zookeeperService;



    @Test
    public void test() throws InterruptedException {
     

        Integer number = zookeeperService.getNumber();

        System.out.println(number);

    }

}