技术经验谈
xugaoyi
2022-01-04
目录

面试题精讲

# 尚硅谷java面试题精讲-第三季

https://www.bilibili.com/video/BV1Hy4y1B78T

# 4.spring

# 4.1 spring里的aop

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spring5不一样:

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# 4.2 spring循环依赖

# 面试题

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# 三级缓存解决对象的循环依赖问题

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# 循环依赖debug

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# refresh方法

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# finsishBeanFactoryIniilization

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# pripareInstanteSigletons

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# doGetBean

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# getSingleton

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初次走else,返回null

,找不到缓存,则开始创建流程:

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# createbean

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# docreatebean

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createBeanInstance

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# addSingletonFactory

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# populateBean

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# b初始化时填充属性a:

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# 循环依赖的总结

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# 5.redis

# 题目

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# 数据类型

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# 五大数据类型的落地应用

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# string

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# 分布式锁

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# hash

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# list

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# set-无序无重复

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# zset

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# 5.2 分布式锁

# 面试题

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# 改进1-单机加锁

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# 改进2 分布式锁

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jmeter压测,模拟并发

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# 使用事务来删除key

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正常情况:

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异常情况: 被加塞

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另外用户加塞:

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导致我自己事务失败. 类似mysql的乐观锁

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# 使用jedis+lua脚本 删除key

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使用zookeeper的强一致性来解决这个问题

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# 综合解决方案

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# 总结

https://www.bilibili.com/video/BV1Hy4y1B78T?p=61&spm_id_from=pageDriver

# 5.3 缓存过期淘汰策略

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# 最大内存配置

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# 定时删除,惰性删除

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# 定期删除

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# 内存淘汰策略

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两种配置方式

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# LRU算法

Caffeine 当下最优秀的内存缓存框架的使用与最佳实践+配合Redis做二级缓存 (opens new window)

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# 手写lru

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# 案例1

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构造函数true; 访问顺序

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构造函数false: 访问顺序

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# 案例2 不依赖jdk

参考AQS

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编辑 (opens new window)
上次更新: 2022/08/16, 20:05:05
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