1 | /** |
---|
2 | * Licensed to the Apache Software Foundation (ASF) under one |
---|
3 | * or more contributor license agreements. See the NOTICE file |
---|
4 | * distributed with this work for additional information |
---|
5 | * regarding copyright ownership. The ASF licenses this file |
---|
6 | * to you under the Apache License, Version 2.0 (the |
---|
7 | * "License"); you may not use this file except in compliance |
---|
8 | * with the License. You may obtain a copy of the License at |
---|
9 | * |
---|
10 | * http://www.apache.org/licenses/LICENSE-2.0 |
---|
11 | * |
---|
12 | * Unless required by applicable law or agreed to in writing, software |
---|
13 | * distributed under the License is distributed on an "AS IS" BASIS, |
---|
14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
---|
15 | * See the License for the specific language governing permissions and |
---|
16 | * limitations under the License. |
---|
17 | */ |
---|
18 | package org.apache.hadoop.hdfs; |
---|
19 | |
---|
20 | import java.io.IOException; |
---|
21 | import java.io.InputStream; |
---|
22 | import java.io.OutputStream; |
---|
23 | import java.util.Random; |
---|
24 | |
---|
25 | import junit.framework.TestCase; |
---|
26 | |
---|
27 | import org.apache.commons.logging.Log; |
---|
28 | import org.apache.commons.logging.LogFactory; |
---|
29 | import org.apache.hadoop.conf.Configuration; |
---|
30 | import org.apache.hadoop.fs.FileStatus; |
---|
31 | import org.apache.hadoop.fs.FileSystem; |
---|
32 | import org.apache.hadoop.fs.Path; |
---|
33 | import org.apache.hadoop.security.UnixUserGroupInformation; |
---|
34 | import org.apache.hadoop.security.UserGroupInformation; |
---|
35 | |
---|
36 | /** Utilities for append-related tests */ |
---|
37 | class AppendTestUtil { |
---|
38 | /** For specifying the random number generator seed, |
---|
39 | * change the following value: |
---|
40 | */ |
---|
41 | static final Long RANDOM_NUMBER_GENERATOR_SEED = null; |
---|
42 | |
---|
43 | static final Log LOG = LogFactory.getLog(AppendTestUtil.class); |
---|
44 | |
---|
45 | private static final Random SEED = new Random(); |
---|
46 | static { |
---|
47 | final long seed = RANDOM_NUMBER_GENERATOR_SEED == null? |
---|
48 | SEED.nextLong(): RANDOM_NUMBER_GENERATOR_SEED; |
---|
49 | LOG.info("seed=" + seed); |
---|
50 | SEED.setSeed(seed); |
---|
51 | } |
---|
52 | |
---|
53 | private static final ThreadLocal<Random> RANDOM = new ThreadLocal<Random>() { |
---|
54 | protected Random initialValue() { |
---|
55 | final Random r = new Random(); |
---|
56 | synchronized(SEED) { |
---|
57 | final long seed = SEED.nextLong(); |
---|
58 | r.setSeed(seed); |
---|
59 | LOG.info(Thread.currentThread().getName() + ": seed=" + seed); |
---|
60 | } |
---|
61 | return r; |
---|
62 | } |
---|
63 | }; |
---|
64 | |
---|
65 | static int nextInt() {return RANDOM.get().nextInt();} |
---|
66 | static int nextInt(int n) {return RANDOM.get().nextInt(n);} |
---|
67 | static int nextLong() {return RANDOM.get().nextInt();} |
---|
68 | |
---|
69 | static byte[] randomBytes(long seed, int size) { |
---|
70 | LOG.info("seed=" + seed + ", size=" + size); |
---|
71 | final byte[] b = new byte[size]; |
---|
72 | final Random rand = new Random(seed); |
---|
73 | rand.nextBytes(b); |
---|
74 | return b; |
---|
75 | } |
---|
76 | |
---|
77 | static void sleep(long ms) { |
---|
78 | try { |
---|
79 | Thread.sleep(ms); |
---|
80 | } catch (InterruptedException e) { |
---|
81 | LOG.info("ms=" + ms, e); |
---|
82 | } |
---|
83 | } |
---|
84 | |
---|
85 | static FileSystem createHdfsWithDifferentUsername(Configuration conf |
---|
86 | ) throws IOException { |
---|
87 | Configuration conf2 = new Configuration(conf); |
---|
88 | String username = UserGroupInformation.getCurrentUGI().getUserName()+"_XXX"; |
---|
89 | UnixUserGroupInformation.saveToConf(conf2, |
---|
90 | UnixUserGroupInformation.UGI_PROPERTY_NAME, |
---|
91 | new UnixUserGroupInformation(username, new String[]{"supergroup"})); |
---|
92 | return FileSystem.get(conf2); |
---|
93 | } |
---|
94 | |
---|
95 | static void write(OutputStream out, int offset, int length) throws IOException { |
---|
96 | final byte[] bytes = new byte[length]; |
---|
97 | for(int i = 0; i < length; i++) { |
---|
98 | bytes[i] = (byte)(offset + i); |
---|
99 | } |
---|
100 | out.write(bytes); |
---|
101 | } |
---|
102 | |
---|
103 | static void check(FileSystem fs, Path p, long length) throws IOException { |
---|
104 | int i = -1; |
---|
105 | try { |
---|
106 | final FileStatus status = fs.getFileStatus(p); |
---|
107 | TestCase.assertEquals(length, status.getLen()); |
---|
108 | InputStream in = fs.open(p); |
---|
109 | for(i++; i < length; i++) { |
---|
110 | TestCase.assertEquals((byte)i, (byte)in.read()); |
---|
111 | } |
---|
112 | i = -(int)length; |
---|
113 | TestCase.assertEquals(-1, in.read()); //EOF |
---|
114 | in.close(); |
---|
115 | } catch(IOException ioe) { |
---|
116 | throw new IOException("p=" + p + ", length=" + length + ", i=" + i, ioe); |
---|
117 | } |
---|
118 | } |
---|
119 | } |
---|