package com.lpy.mall.common;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.concurrent.TimeUnit;
public class TokenCache {
private static Logger logger= LoggerFactory.getLogger(TokenCache.class);
//声明一个静态的内存块,用LRU算法来移除缓存项
private static LoadingCache<String,String> localCache= CacheBuilder.newBuilder().initialCapacity(1000).maximumSize(10000)
.expireAfterAccess(12, TimeUnit.HOURS)
.build(new CacheLoader<String, String>() {
//默认的数据加载实现,当调用get取值的时候,如果key没有对应的值,就调用这个方法进行加载
@Override
public String load(String s) throws Exception {
return "null";
}
});
public static void setKey(String key,String value){
localCache.put(key, value);
}
public static String getKey(String key){
String value=null;
try {
value=localCache.get(key);
if("null".equals(value)){
return null;
}
return value;
}catch (Exception e){
logger.error("localCache get error",e);
}
return null;
}
}
电商项目之使用本地缓存来检查问题答案(重点)
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转载自blog.csdn.net/Richard_666/article/details/85717960
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