| /** |
| * 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, |
| DatanodeDescriptor[] locations) throws IOException; |
| } |
