/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.yarn.sharedcache;
import java.io.IOException;
import java.io.InputStream;
import org.apache.hadoop.classification.InterfaceAudience.Public;
import org.apache.hadoop.classification.InterfaceStability.Evolving;
@Public
@Evolving
/**
* An interface to calculate a checksum for a resource in the shared cache. The
* checksum implementation should be thread safe.
*/
public interface SharedCacheChecksum {
/**
* Calculate the checksum of the passed input stream.
*
* @param in <code>InputStream</code> to be checksumed
* @return the message digest of the input stream
* @throws IOException
*/
public String computeChecksum(InputStream in) throws IOException;
}