Redisson学习

news2024/11/19 3:37:16

简介

Redisson 是一个在 Redis 的基础上实现的 Java 驻留内存数据网格（In-Memory Data Grid）。它提供了许多分布式 Java 对象和服务，包括分布式锁、分布式集合、分布式执行服务、分布式调度任务等。

使用

依赖

相关依赖，注意版本

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<!-- https://mvnrepository.com/artifact/org.redisson/redisson -->
<dependency>
    <groupId>org.redisson</groupId>
    <artifactId>redisson</artifactId>
    <version>3.21.3</version>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
</dependency>
<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.5.6}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

配置

spring.redis.host=192.168.0.120
spring.redis.port=6379
spring.redis.password=123456
spring.redis.timeout=3000
spring.redis.lettuce.pool.max-wait=-1
spring.redis.lettuce.pool.max-active=300
spring.redis.lettuce.pool.max-idle=100
spring.redis.lettuce.pool.min-idle=20

RedisConfig

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

@Configuration
public class RedisConfig {

    @Bean
    public RedisTemplate<String, Object> redisTemplate(LettuceConnectionFactory redisConnectionFactory) {
        RedisTemplate<String, Object> redisTemplate = new RedisTemplate<String, Object>();
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());
        redisTemplate.setHashKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashValueSerializer(new GenericJackson2JsonRedisSerializer());
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        return redisTemplate;
    }

}

RBloomFilterConfiguration

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

/**
 * 布隆过滤器配置
 */
@Configuration
public class RBloomFilterConfiguration {


    @Bean
    public RedissonClient redissonClient(){
        Config config = new Config();
        config.useSingleServer().setAddress("redis://192.168.0.120:6379");
        config.useSingleServer().setPassword("123456");
        RedissonClient redisson = Redisson.create(config);
        return redisson;
    }
    /**
     * 防⽌检查⽤户是否重复时查询数据库的布隆过滤器
     */
    @Bean
    public RBloomFilter<String> userRegisterCachePenetrationBloomFilter(RedissonClient redissonClient) {
        RBloomFilter<String> cachePenetrationBloomFilter = redissonClient.
                getBloomFilter("userRegisterCachePenetrationBloomFilter");
        cachePenetrationBloomFilter.tryInit(100000000L, 0.001);
        return cachePenetrationBloomFilter;
    }
}

业务逻辑

public interface IRedissonService {

    //测试布隆过滤器
    void testBloomFilter();

    //分布式锁
    void testLock();

    //写锁
    void testWriteLock();

    //读锁
    void testReadLock();
}

@Service
@Transactional
public class RedissonServiceImpl implements IRedissonService {

    @Autowired
    private RedisTemplate<String, Object> redisTemplate;

    @Autowired
    private RedissonClient redissonClient;

    @Autowired
    private RBloomFilter<String> userRegisterCachePenetrationBloomFilter;

    public void testBloomFilter() {
        // 新增数据到布隆过滤器中
        userRegisterCachePenetrationBloomFilter.add("IRedissonService");
        // 判断元素是否存在布隆过滤器
        boolean hasUsername = userRegisterCachePenetrationBloomFilter.contains("IRedissonService");
        System.out.println("testBloomFilter:" + hasUsername);
    }

    //TODO 注意 key 内容中不要包含一些关键词 比如 java,lock等等，否则会报错
    @Override
    public void testLock() {
        RLock testLock = redissonClient.getLock("testL");
        testLock.lock();//加锁
        try {
            //业务......
            redisTemplate.opsForValue().set("testLK", "testLValue", 5, TimeUnit.SECONDS);
            System.out.println("加锁成功");
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            Object testLockValue = redisTemplate.opsForValue().get("testLK");
            System.out.println("解锁成功" + testLockValue);
            testLock.unlock();//解锁
        }
    }

    @Override
    public void testWriteLock() {
        RReadWriteLock testWriteLock = redissonClient.getReadWriteLock("testWL");
        try {
            testWriteLock.writeLock().lock();
            //业务......
            redisTemplate.opsForValue().set("testWLK", "testWLV", 10, TimeUnit.SECONDS);
            Thread.sleep(3000);
            System.out.println("testWriteLock 加锁成功");
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            Object testWriteLockValue = redisTemplate.opsForValue().get("testWLK");
            System.out.println("testWriteLock 解锁成功" + testWriteLockValue);
            testWriteLock.writeLock().unlock();
        }
    }

    @Override
    public void testReadLock() {
        RReadWriteLock testReadLock = redissonClient.getReadWriteLock("testRL");
        try {
            testReadLock.readLock().lock(2000, TimeUnit.MILLISECONDS);
            //业务......
            Object testWriteLockValue = redisTemplate.opsForValue().get("testWLK");
            System.out.println("testReadLock 加锁成功" + testWriteLockValue);
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            System.out.println("testReadLock 解锁成功");
            testReadLock.readLock().unlock();
        }
    }
}

单元测试

import com.xysd.commodity.application.impl.MyAspectServiceImpl;
import com.xysd.commodity.domain.PaymentProcess;
import com.xysd.common.domain.Holiday;
import com.xysd.test.application.IDataCacheService;
import com.xysd.test.application.IDomeService;
import com.xysd.test.application.IRedissonService;
import com.xysd.test.infrastructure.DomeRepositoryHibernate;
import com.xysd.utils.calendar.CalendarUtils;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mockito;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.mock.mockito.MockBean;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowCallbackHandler;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.UUID;

@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = CDAApplication.class)
public class CDAApplicationTest {

    @Autowired
    private IRedissonService redissonService;

    @Test
    public void testBloomFilter() {
        redissonService.testBloomFilter();
    }

    @Test
    public void testLock() throws Exception {
        redissonService.testLock();
        redissonService.testWriteLock();
        Thread.sleep(5000);
        redissonService.testReadLock();
    }

}