2110 summary of knowledge points and common problems in redis class

Day01~Redis Introduction to technology

Core knowledge points

• Redis Technical introduction ( What is it? , Birth background , edition , Basic framework )
• Redis Basic operation of service ( Sign in redis, Basic instructions , sign out redis)
• Redis Data types commonly used in (string,hash,list,set,…)

FAQ analysis

• Redis What is it? ?( Distributed Key/Value Structure of the memory database , Non relational data ,NoSql database ）
• Redis The background of database birth ？( The access pressure of relational database is relatively large , Local memory does not support multi service instance sharing )
• Redis The basic architecture of the database ？(C/S,redis-cli,redis-server)
• You know Redis What are the basic instructions ？(redis-cli,redis-server,exit,clear,type,expire,shutdown,help,?,keys,flushall,flushdb)
• What are the characteristics of string types ？( All values are strings , Dynamic space allocation , The increment of integer value can be realized , Decline , Implement logging )
• Operation string type (string) Common instructions for ？(set,get,strlen,append,mset,mget,incr,incrby,decr,decrby,del)
• Hash type (hash) What are the characteristics of data ？( Is that the value can also be used key/value Structure storage ,key disorder ,key Same value override , Storing objects is convenient )
• Operation hash type (hash) Common instructions for ?(hset,hget,hgetall,hexits,hdel,hkeys,hvals,hincrby,hmget)
• List the type (list) What are the characteristics of data ？（ Linked list , The order of the added elements will be recorded , Element allows repetition , Can achieve FIFO,FILO These features ）
• Action list type (list) Common instructions of type ?(lpush,rpop,rpush,lpop,lrem,lindex,ltrim,lset,linsert,lrange,rpoplpush,lpos)
• Set Properties of type data ?( hash , Do not record the order in which elements are added , Elements are not allowed to repeat )
• operation set Common instructions of type ？(sadd,smembers,spop,smove,scard,sunion)
• Redis Application scenarios of various data types in ？

common Bug analysis

• redis Service failed to start ?( Look at the container log )
• redis Instruction application error ?( Practice with reference to grammar )

Homework after class

• Summarize the knowledge points in class
• complete Redis Common data type operations
• preview redis Corresponding Java client api practice

Day02~Jedis And RedisTemplate Application practice

Core knowledge points

• redis client API brief introduction
• Engineering structure analysis and project creation
• Jedis And JedisPool Basic application practice
• RedisTemplate Object application practice analysis

FAQ analysis

• Jedis Commonly used API What are they? ？(Jedis,JedisPool,JedisPoolConfig)
• Jedis How to store POJO Object to redis？( Convert the object to json strand , Put the object in Hash Form for storage )
• Gson What is it? ?(Google The company's exit is used for operation JSON A set of formatted data API)
• JedisPool What is it? ?( One Jedis Connect pool objects , All pool objects have a meta design )
• We are applying JedisPool When connecting to the pool , How to ensure that this object is unique in memory ?( Singleton mode of double lock verification )
• RedisTemplate The role of objects ?(Spring A framework is introduced to operate Redis Of API object )
• RedisTemplate What is the default serialization method of objects ？(JDK The way , Default key and value Need to achieve Java Serialization interface in )
• RedisTemplate When an object is serialized according to the default rules , Does our object need to implement a serialization interface ？( need ）
• How to modify RedisTemplate Serialization of objects ？( adopt setXxx And so on )
• RedisTemplate What design patterns are applied ?( Template method pattern )
• How do you learn RedisTemplate Object application ?( Refer to official documentation ,demo, Source code )

common Bug analysis

• Can't connect to the remote redis service ？(redis Whether the service starts , Whether the firewall is turned on ,ip And whether the account number is correct ,redis.conf Configuration problem ）
• be based on RedisTemplate Object's incrment Method realization key When the value is incremented , Note the structure type of the value ？(Long)
• Object serialization and deserialization exceptions ?( Be sure to pay attention to serialization rules )

Homework after class

• Summarize the knowledge points in class
• Completion is based on Jedis Object implementation data application practice ？
• complete CSDN In document SSO System , Design and implementation of simple voting system .
• Preview and try to complete RedisTemplate Custom application of object ( Combined with practice )

Day03~Java in redis Advanced operation practice

Core knowledge points

• StringRedisTemplate Object characteristics and Applications ？
• Based on business implementation RedisTemplate Object customization ？
• be based on redis Realize single sign on system ？( stay redis Record user status )
• be based on redis A voting system that implements an activity ？

FAQ analysis

• StringRedisTemplate What are the characteristics of the object ？
• Why to customize RedisTemplate object ？( Business needs ）
• be based on redis When storing user status , What type of data do you use ？(hash type )
• adopt redis Store login status , What do you think are the disadvantages ？( To check the login status of users, you need to query redis)
• be based on redis A voting system that implements an activity , What type of data do you use ？(Set type )
• How to use... In our business objects redis？( Inject RedisTemplate Or its subclass )
• SpringBoot In Engineering Lettuce How to configure the connection pool ？

common Bug analysis

• Dependency injection exception ？( Check whether the object is handed over to Spring management , How to implement object injection when an interface has multiple implementations )
• Object serialization storage exception ？

Homework after class

• Summarize the classroom knowledge points
• Finish class RedisTemplate The custom of .
• Read ruoyi system RedisTemplate Customization of objects
• preview 03-Redis client API In application AOP The way redis Application .