| /** |
| * 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.namenode; |
| |
| import java.util.Iterator; |
| import java.util.Random; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.apache.hadoop.hdfs.protocol.proto.HdfsProtos.BlockProto; |
| |
| import org.junit.Before; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.rules.TestName; |
| import static org.junit.Assert.*; |
| |
| /** |
| * Validate fixed-size block partitioning. |
| */ |
| public class TestFixedBlockResolver { |
| |
| @Rule public TestName name = new TestName(); |
| |
| private final FixedBlockResolver blockId = new FixedBlockResolver(); |
| |
| @Before |
| public void setup() { |
| Configuration conf = new Configuration(false); |
| conf.setLong(FixedBlockResolver.BLOCKSIZE, 512L * (1L << 20)); |
| conf.setLong(FixedBlockResolver.START_BLOCK, 512L * (1L << 20)); |
| blockId.setConf(conf); |
| System.out.println(name.getMethodName()); |
| } |
| |
| @Test |
| public void testExactBlock() throws Exception { |
| FileStatus f = file(512, 256); |
| int nblocks = 0; |
| for (BlockProto b : blockId.resolve(f)) { |
| ++nblocks; |
| assertEquals(512L * (1L << 20), b.getNumBytes()); |
| } |
| assertEquals(1, nblocks); |
| |
| FileStatus g = file(1024, 256); |
| nblocks = 0; |
| for (BlockProto b : blockId.resolve(g)) { |
| ++nblocks; |
| assertEquals(512L * (1L << 20), b.getNumBytes()); |
| } |
| assertEquals(2, nblocks); |
| |
| FileStatus h = file(5120, 256); |
| nblocks = 0; |
| for (BlockProto b : blockId.resolve(h)) { |
| ++nblocks; |
| assertEquals(512L * (1L << 20), b.getNumBytes()); |
| } |
| assertEquals(10, nblocks); |
| } |
| |
| @Test |
| public void testEmpty() throws Exception { |
| FileStatus f = file(0, 100); |
| Iterator<BlockProto> b = blockId.resolve(f).iterator(); |
| assertTrue(b.hasNext()); |
| assertEquals(0, b.next().getNumBytes()); |
| assertFalse(b.hasNext()); |
| } |
| |
| @Test |
| public void testRandomFile() throws Exception { |
| Random r = new Random(); |
| long seed = r.nextLong(); |
| System.out.println("seed: " + seed); |
| r.setSeed(seed); |
| |
| int len = r.nextInt(4096) + 512; |
| int blk = r.nextInt(len - 128) + 128; |
| FileStatus s = file(len, blk); |
| long nbytes = 0; |
| for (BlockProto b : blockId.resolve(s)) { |
| nbytes += b.getNumBytes(); |
| assertTrue(512L * (1L << 20) >= b.getNumBytes()); |
| } |
| assertEquals(s.getLen(), nbytes); |
| } |
| |
| FileStatus file(long lenMB, long blocksizeMB) { |
| Path p = new Path("foo://bar:4344/baz/dingo"); |
| return new FileStatus( |
| lenMB * (1 << 20), /* long length, */ |
| false, /* boolean isdir, */ |
| 1, /* int block_replication, */ |
| blocksizeMB * (1 << 20), /* long blocksize, */ |
| 0L, /* long modification_time, */ |
| 0L, /* long access_time, */ |
| null, /* FsPermission permission, */ |
| "hadoop", /* String owner, */ |
| "hadoop", /* String group, */ |
| p); /* Path path */ |
| } |
| |
| } |