| /** |
| * 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.util.ArrayList; |
| |
| import org.apache.hadoop.hdfs.protocol.Block; |
| import org.apache.hadoop.hdfs.server.common.GenerationStamp; |
| |
| import junit.framework.TestCase; |
| |
| /** |
| * This class tests that methods in DatanodeDescriptor |
| */ |
| public class TestDatanodeDescriptor extends TestCase { |
| /** |
| * Test that getInvalidateBlocks observes the maxlimit. |
| */ |
| public void testGetInvalidateBlocks() throws Exception { |
| final int MAX_BLOCKS = 10; |
| final int REMAINING_BLOCKS = 2; |
| final int MAX_LIMIT = MAX_BLOCKS - REMAINING_BLOCKS; |
| |
| DatanodeDescriptor dd = new DatanodeDescriptor(); |
| ArrayList<Block> blockList = new ArrayList<Block>(MAX_BLOCKS); |
| for (int i=0; i<MAX_BLOCKS; i++) { |
| blockList.add(new Block(i, 0, GenerationStamp.FIRST_VALID_STAMP)); |
| } |
| dd.addBlocksToBeInvalidated(blockList); |
| Block[] bc = dd.getInvalidateBlocks(MAX_LIMIT); |
| assertEquals(bc.length, MAX_LIMIT); |
| bc = dd.getInvalidateBlocks(MAX_LIMIT); |
| assertEquals(bc.length, REMAINING_BLOCKS); |
| } |
| |
| public void testBlocksCounter() throws Exception { |
| DatanodeDescriptor dd = new DatanodeDescriptor(); |
| assertEquals(0, dd.numBlocks()); |
| BlockInfo blk = new BlockInfo(new Block(1L), 1); |
| BlockInfo blk1 = new BlockInfo(new Block(2L), 2); |
| // add first block |
| assertTrue(dd.addBlock(blk)); |
| assertEquals(1, dd.numBlocks()); |
| // remove a non-existent block |
| assertFalse(dd.removeBlock(blk1)); |
| assertEquals(1, dd.numBlocks()); |
| // add an existent block |
| assertFalse(dd.addBlock(blk)); |
| assertEquals(1, dd.numBlocks()); |
| // add second block |
| assertTrue(dd.addBlock(blk1)); |
| assertEquals(2, dd.numBlocks()); |
| // remove first block |
| assertTrue(dd.removeBlock(blk)); |
| assertEquals(1, dd.numBlocks()); |
| // remove second block |
| assertTrue(dd.removeBlock(blk1)); |
| assertEquals(0, dd.numBlocks()); |
| } |
| } |