springboot篇】十九. springboot整合redis高并发环境测试

springboot整合redis高并发环境测试

中国加油，武汉加油！

篇幅较长，配合右边目录观看

项目准备

1. 本案例基于springboot篇】十八. springboot整合redis
2. jmeter

1. 案例

1.1 pom导包

<dependency>
    <groupId>org.redissongroupId>
    <artifactId>redissonartifactId>
    <version>3.11.0version>
dependency>

1.2 定义RedisConfig

package com.wpj.config;

import org.redisson.Redisson;
import org.redisson.api.RedissonClient;
import org.redisson.config.Config;
import org.springframework.boot.SpringBootConfiguration;
import org.springframework.context.annotation.Bean;

@SpringBootConfiguration
public class RedisConfig {

    /**
     * 配置Redis锁
     * @return
     */
    @Bean
    public RedissonClient redissonClient(){

        RedissonClient redissonClient = null;
        Config config = new Config();
        String url = "redis://47.98.33.215:6379";
        config.useSingleServer().setAddress(url);
        try {
            redissonClient = Redisson.create(config);
            return redissonClient;
        } catch (Exception e) {
            return null;
        }
    }
}

1.3 定义一个类用于加解锁

package com.wpj.lock;

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.stereotype.Component;

import java.util.concurrent.TimeUnit;

/**
 * 加锁的类
 */
@Slf4j
@Component
public class DistributeRedisLock {
    @Autowired
    private RedissonClient redissonClient;

    // 加锁
    public boolean lock(String lockName){
        try {
            if(null == redissonClient) {
                log.info("注入redisson失败");
                return false;
            }
            RLock lock = redissonClient.getLock(lockName);
            lock.lock(30, TimeUnit.SECONDS);
            log.info("加锁成功");
            return true;
        } catch (Exception e) {
            log.info("未知错误");
            return false;
        }
    }
    // 释放锁
    public boolean unlock(String lockName){
        try{
            if(null == redissonClient) {
                log.info("释放锁失败"+lockName);
                return false;
            }
            // 获取锁
            RLock lock = redissonClient.getLock(lockName);
            if(null!= lock) {
                lock.unlock();
                log.info("释放锁成功");
                return true;
            }
            return false;
        } catch (Exception e) {
            log.info("未知错误");
            return false;
        }
    }
}

1.5 定义业务实现

package com.wpj.service.impl;

import com.wpj.lock.DistributeRedisLock;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

/**
 * 火车票减库存
 */
@Service
@Slf4j
public class TrainTickServiceImpl {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Autowired
    private DistributeRedisLock distributeRedisLock;

    /**
     * 减售火车票
     */
    public synchronized String produceStock(){

        String lock = "lock";
        try {
            boolean dLock = distributeRedisLock.lock(lock);
            if (true == dLock) {
                // 从redis取出数据
                Integer stock = Integer.parseInt(stringRedisTemplate.opsForValue().get("trainticks"));
                // 判断是否大于0
                if(stock > 0) {
                    int rStock = stock - 1;
                    // 将真实的库存放到redis中去
                    stringRedisTemplate.opsForValue().set("trainticks", String.valueOf(rStock));
                    log.info("扣减库存成功，剩余库存：" + rStock);
                } else {
                    log.info("库存不足");
                }
            } else {
                return "";
            }

        } finally {
           distributeRedisLock.unlock(lock);
        }
        return "抢票成功。。。";
    }

}

1.6 controller添加方法

@Autowired
private TrainTickServiceImpl trainTickService;

@RequestMapping("/produceStockRedisson")
public String produceStockRedisson(){
    return trainTickService.produceStock();
}

1.7 redis中添加数据

1.8 使用jMeter测试

2. 序列化

2.1 导包

<dependency>
    <groupId>com.alibabagroupId>
    <artifactId>fastjsonartifactId>
    <version>1.2.54version>
dependency>

2.2 自定义序列化

package com.wpj.serializer;

import com.alibaba.fastjson.JSON;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;

import java.nio.charset.Charset;

public class MySerializer implements RedisSerializer {

    private Class clazz;

    private MySerializer(Class clazz){
        this.clazz = clazz;
    }

    /**
     * 序列化，将对象转换成字符串
     * @param o
     * @return
     * @throws SerializationException
     */
    @Override
    public byte[] serialize(Object o) throws SerializationException {
        if(null==o){
            return null;
        }
        //我们要将这个值转换成json对象存储到Redis中
        String jsonString = JSON.toJSONString(o);
        return jsonString.getBytes(Charset.forName("UTF-8"));
    }

    /**
     * 反序列化，将redis的字符串转换成java对象
     * @param bytes
     * @return
     * @throws SerializationException
     */
    @Override
    public Object deserialize(byte[] bytes) throws SerializationException {
        if(null==bytes) {
            return null;
        }
        String strResult = new String(bytes);
        //将String类型的数据(JSON)转换成java对象
        return JSON.parseObject(strResult, clazz);
    }
}

2.3 RedisConfig配置

@Bean
public RedisTemplate redisTemplate(RedisConnectionFactory redisConnectionFactory){
    RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
    // 设置连接工厂
    redisTemplate.setConnectionFactory(redisConnectionFactory);
    // 设置序列化器
    redisTemplate.setKeySerializer(new StringRedisSerializer());
    redisTemplate.setValueSerializer(new MySerializer(Object.class));
    return redisTemplate;
}

2.4 使用Redis提供的序列化