/*
* The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
* (the "License"). You may not use this work except in compliance with the License, which is
* available at www.apache.org/licenses/LICENSE-2.0
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied, as more fully set forth in the License.
*
* See the NOTICE file distributed with this work for information regarding copyright ownership.
*/
package alluxio.master.file.meta;
import alluxio.AlluxioURI;
/**
* Cache for recording information about paths that are not present in UFS.
*/
public interface UfsAbsentPathCache {
/**
* Processes the given path for the cache. This will sequentially walk down the path to find
* components which do and do not exist in the UFS, and updates the cache accordingly.
*
* @param path the path to process for the cache
*/
void process(AlluxioURI path);
/**
* Returns true if the given path is absent, according to this cache. A path is absent if one of
* its ancestors is absent.
*
* @param path the path to check
* @return true if the path is absent according to the cache
*/
boolean isAbsent(AlluxioURI path);
}