Jedis 6 - Introduction and difference between redisson and jedis

1、redission

Official document address ：

https://github.com/redisson/redisson/wiki/%E7%9B%AE%E5%BD%95

1.1 redission Distributed locks for

important ：redission The most important is distributed lock

1.2、java Use in RedissonClient operation redis ***

1.2.1、redission introduction

1.2.2、redission introduction + Basic operation of lock （Rlock A lock is a relocatable lock ）

1.3、redis A single thread , Why do we need redission Do distributed locks

2、jedis

2.1、jedis and springboot Integration of

rely on ：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.bear</groupId>
    <artifactId>redission-test</artifactId>
    <version>1.0-SNAPSHOT</version>

    <description> Yes redission Test of ,redission Used to connect to redis</description>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>

        <!-- spring2.X Integrate redis what is needed common-pool2-->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-pool2</artifactId>
            <version>2.6.0</version>
        </dependency>

        <dependency>
            <groupId>org.redisson</groupId>
            <artifactId>redisson-spring-boot-starter</artifactId>
            <version>3.9.1</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
    </dependencies>

</project>

config layer ：

package com.bear.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import java.time.Duration;

/** * < sketch > * < Detailed description > * * @author LiuShanshan * @version $Id$ */
@EnableCaching
@Configuration
public class RedisConfig extends CachingConfigurerSupport {
    

    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
    
        RedisTemplate<String, Object> template = new RedisTemplate<>();
        RedisSerializer<String> redisSerializer = new StringRedisSerializer();
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
        template.setConnectionFactory(factory);
//key Serialization mode 
        template.setKeySerializer(redisSerializer);
//value serialize 
        template.setValueSerializer(jackson2JsonRedisSerializer);
//value hashmap serialize 
        template.setHashValueSerializer(jackson2JsonRedisSerializer);
        return template;
    }

    @Bean
    public CacheManager cacheManager(RedisConnectionFactory factory) {
    
        RedisSerializer<String> redisSerializer = new StringRedisSerializer();
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
// Solve the problem of query cache conversion exception 
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);
//  Configure serialization （ Solve the problem of garbled code ）, Expiration time 600 second 
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
                .entryTtl(Duration.ofSeconds(600))
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer))
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
                .disableCachingNullValues();
        RedisCacheManager cacheManager = RedisCacheManager.builder(factory)
                .cacheDefaults(config)
                .build();
        return cacheManager;
    }
}

application.properties To configure ：

#Redis Server address 
spring.redis.host=120.48.77.231
#spring.redis.password=123456
#Redis Server connection port 
spring.redis.port=6379
#Redis Database index （ The default is 0）
spring.redis.database= 0
# Connection timeout （ millisecond ）
spring.redis.timeout=1800000
# Maximum number of connections in connection pool （ Use a negative value to indicate that there is no limit ）
spring.redis.lettuce.pool.max-active=20
# Maximum blocking waiting time ( A negative number means no limit )
spring.redis.lettuce.pool.max-wait=-1
# The maximum free connection in the connection pool 
spring.redis.lettuce.pool.max-idle=5
# The smallest free connection in the connection pool 
spring.redis.lettuce.pool.min-idle=0

controller layer ：

package com.bear.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/** * < sketch > * < Detailed description > * * @author LiuShanshan * @version $Id$ */
@RestController
@RequestMapping("/redisTest")
public class RedisTestController {
    
    @Autowired
    private RedisTemplate redisTemplate;

    @GetMapping
    public String testRedis() {
    
        // Set value to redis
        redisTemplate.opsForValue().set("name","lucy");
        // from redis Get value 
        String name = (String)redisTemplate.opsForValue().get("name");
        return name;
    }
}