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);

public static final String TOKEN_PREFIX = "token_";

//LRU算法
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;
}
}

TokenCache