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package com.ruoyi.framework.config;
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.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.script.DefaultRedisScript;
import org.springframework.data.redis.serializer.StringRedisSerializer;
/**
* redis配置
*
* @author ruoyi
*/
@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport
{
@Bean
@SuppressWarnings(value = { "unchecked", "rawtypes" })
public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory connectionFactory)
{
RedisTemplate<Object, Object> template = new RedisTemplate<>();
template.setConnectionFactory(connectionFactory);
FastJson2JsonRedisSerializer serializer = new FastJson2JsonRedisSerializer(Object.class);
// 使用StringRedisSerializer来序列化和反序列化redis的key值
template.setKeySerializer(new StringRedisSerializer());
template.setValueSerializer(serializer);
// Hash的key也采用StringRedisSerializer的序列化方式
template.setHashKeySerializer(new StringRedisSerializer());
template.setHashValueSerializer(serializer);
template.afterPropertiesSet();
return template;
}
@Bean
public DefaultRedisScript<Long> limitScript()
{
DefaultRedisScript<Long> redisScript = new DefaultRedisScript<>();
redisScript.setScriptText(limitScriptText());
redisScript.setResultType(Long.class);
return redisScript;
}
/**
* 限流脚本
*/
private String limitScriptText()
{
return "local key = KEYS[1]\n" +
"local count = tonumber(ARGV[1])\n" +
"local time = tonumber(ARGV[2])\n" +
"local current = redis.call('get', key);\n" +
"if current and tonumber(current) > count then\n" +
" return tonumber(current);\n" +
"end\n" +
"current = redis.call('incr', key)\n" +
"if tonumber(current) == 1 then\n" +
" redis.call('expire', key, time)\n" +
"end\n" +
"return tonumber(current);";
}
}