/**
* 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.hdfs.server.blockmanagement;
import java.io.IOException;
/**
* This interface is used by the block manager to expose a
* few characteristics of a collection of Block/BlockUnderConstruction.
*/
public interface MutableBlockCollection extends BlockCollection {
/**
* Set the block at the given index.
*/
public void setBlock(int index, BlockInfo blk);
/**
* Convert the last block of the collection to an under-construction block
* and set the locations.
*/
public BlockInfoUnderConstruction setLastBlock(BlockInfo lastBlock,
DatanodeStorageInfo[] storages) throws IOException;
}