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外国vps如何开发redis的二级缓存

发布人:欢子 发布时间:2026-01-21 13:03 阅读量:9
外国vps开发redis二级缓存的示例:

redis二级缓存的实现,主要是重写了Cache.java的方法,代码:

publicclassimplementsCache{

privatestaticfinalLoggerlogger=LoggerFactory.getLogger(MybatisRedisCache.class);

privatefinalReadWriteLockreadWriteLock=newReentrantReadWriteLock();

privateRedisTemplateredisTemplate;

privateStringid;

privatestaticfinallongEXPIRE_TIME_IN_MINUTES=30;

public(Stringid){

if(id==null){

thrownewIllegalArgumentException("CacheinstancesrequireanID");

}

logger.info("=====================================Rediscacheid="+id);

this.id=id;

}

publicStringgetId(){

returnid;

}

publicvoidputObject(Objectkey,Objectvalue){

logger.debug("==============================redisput="+key);

RedisTemplateredisTemplate=getRedisTemplate();

ValueOperationsopsForValue=redisTemplate.opsForValue();

opsForValue.set(key,value,EXPIRE_TIME_IN_MINUTES,TimeUnit.MINUTES);

}

publicObjectgetObject(Objectkey){

logger.debug("================================redisget================================");

RedisTemplateredisTemplate=getRedisTemplate();

ValueOperationsopsForValue=redisTemplate.opsForValue();

returnopsForValue.get(key);

}

publicObjectremoveObject(Objectkey){

logger.debug("==========================================redisremove==========================");

RedisTemplateredisTemplate=getRedisTemplate();

redisTemplate.delete(key);

returnnull;

}

publicvoidclear(){

logger.debug("=====================================clearredis================================");

RedisTemplateredisTemplate=getRedisTemplate();

redisTemplate.execute(newRedisCallback(){

@Override

publicObjectdoInRedis(RedisConnectionconnection)throwsDataAccessException{

大专栏redis实现二级缓存

connection.flushDb();

return"OK";

}

});

}

@Override

publicintgetSize(){

return0;

}

@Override

publicReadWriteLockgetReadWriteLock(){

returnreadWriteLock;

}

publicRedisTemplategetRedisTemplate(){

if(redisTemplate==null){

redisTemplate=ApplicationContextHolder.getBean("redisTemplate");

}

returnredisTemplate;

}

publicvoidsetRedisTemplate(RedisTemplateredisTemplate){

this.redisTemplate=redisTemplate;

}

}

使用redisTemplate方法实现一个ApplicationContextHolder工具类,代码:

@Component

publicclassApplicationContextHolderimplementsApplicationContextAware{

privatestaticApplicationContextapplicationContext;

@Override

publicvoidsetApplicationContext(ApplicationContextctx)throwsBeansException{

applicationContext=ctx;

}

/**

*Getapplicationcontextfromeverywhere

*

*@return

*/

publicstaticApplicationContextgetApplicationContext(){

returnapplicationContext;

}

/**

*Getbeanbyclass

*

*@paramclazz

*@param

*@return

*/

publicstaticTgetBean(Classclazz){

returnapplicationContext.getBean(clazz);

}

/**

*Getbeanbyclassname

*

*@paramname

*@param

*@return

*/

@SuppressWarnings("unchecked")

publicstaticTgetBean(Stringname){

return(T)applicationContext.getBean(name);

}

}

在mapper中添加自定义cache,使用二级缓存,例如:

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