1 | /** |
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2 | * Licensed to the Apache Software Foundation (ASF) under one |
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3 | * or more contributor license agreements. See the NOTICE file |
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4 | * distributed with this work for additional information |
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5 | * regarding copyright ownership. The ASF licenses this file |
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6 | * to you under the Apache License, Version 2.0 (the |
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7 | * "License"); you may not use this file except in compliance |
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8 | * with the License. You may obtain a copy of the License at |
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9 | * |
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10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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11 | * |
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12 | * Unless required by applicable law or agreed to in writing, software |
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13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 | * See the License for the specific language governing permissions and |
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16 | * limitations under the License. |
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17 | */ |
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18 | package org.apache.hadoop.net; |
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19 | |
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20 | import java.io.IOException; |
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21 | import java.io.InputStream; |
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22 | import java.io.OutputStream; |
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23 | import java.net.SocketTimeoutException; |
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24 | import java.nio.channels.Pipe; |
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25 | import java.util.Arrays; |
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26 | |
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27 | import org.apache.commons.logging.Log; |
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28 | import org.apache.commons.logging.LogFactory; |
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29 | |
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30 | import junit.framework.TestCase; |
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31 | |
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32 | /** |
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33 | * This tests timout out from SocketInputStream and |
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34 | * SocketOutputStream using pipes. |
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35 | * |
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36 | * Normal read and write using these streams are tested by pretty much |
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37 | * every DFS unit test. |
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38 | */ |
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39 | public class TestSocketIOWithTimeout extends TestCase { |
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40 | |
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41 | static Log LOG = LogFactory.getLog(TestSocketIOWithTimeout.class); |
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42 | |
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43 | private static int TIMEOUT = 1*1000; |
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44 | private static String TEST_STRING = "1234567890"; |
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45 | |
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46 | private void doIO(InputStream in, OutputStream out) throws IOException { |
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47 | /* Keep on writing or reading until we get SocketTimeoutException. |
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48 | * It expects this exception to occur within 100 millis of TIMEOUT. |
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49 | */ |
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50 | byte buf[] = new byte[4192]; |
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51 | |
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52 | while (true) { |
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53 | long start = System.currentTimeMillis(); |
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54 | try { |
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55 | if (in != null) { |
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56 | in.read(buf); |
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57 | } else { |
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58 | out.write(buf); |
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59 | } |
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60 | } catch (SocketTimeoutException e) { |
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61 | long diff = System.currentTimeMillis() - start; |
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62 | LOG.info("Got SocketTimeoutException as expected after " + |
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63 | diff + " millis : " + e.getMessage()); |
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64 | assertTrue(Math.abs(TIMEOUT - diff) <= 200); |
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65 | break; |
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66 | } |
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67 | } |
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68 | } |
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69 | |
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70 | /** |
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71 | * Just reads one byte from the input stream. |
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72 | */ |
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73 | static class ReadRunnable implements Runnable { |
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74 | private InputStream in; |
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75 | |
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76 | public ReadRunnable(InputStream in) { |
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77 | this.in = in; |
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78 | } |
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79 | public void run() { |
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80 | try { |
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81 | in.read(); |
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82 | } catch (IOException e) { |
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83 | LOG.info("Got expection while reading as expected : " + |
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84 | e.getMessage()); |
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85 | return; |
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86 | } |
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87 | assertTrue(false); |
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88 | } |
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89 | } |
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90 | |
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91 | public void testSocketIOWithTimeout() throws IOException { |
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92 | |
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93 | // first open pipe: |
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94 | Pipe pipe = Pipe.open(); |
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95 | Pipe.SourceChannel source = pipe.source(); |
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96 | Pipe.SinkChannel sink = pipe.sink(); |
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97 | |
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98 | try { |
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99 | InputStream in = new SocketInputStream(source, TIMEOUT); |
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100 | OutputStream out = new SocketOutputStream(sink, TIMEOUT); |
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101 | |
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102 | byte[] writeBytes = TEST_STRING.getBytes(); |
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103 | byte[] readBytes = new byte[writeBytes.length]; |
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104 | |
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105 | out.write(writeBytes); |
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106 | doIO(null, out); |
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107 | |
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108 | in.read(readBytes); |
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109 | assertTrue(Arrays.equals(writeBytes, readBytes)); |
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110 | doIO(in, null); |
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111 | |
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112 | /* |
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113 | * Verify that it handles interrupted threads properly. |
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114 | * Use a large timeout and expect the thread to return quickly. |
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115 | */ |
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116 | in = new SocketInputStream(source, 0); |
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117 | Thread thread = new Thread(new ReadRunnable(in)); |
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118 | thread.start(); |
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119 | |
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120 | try { |
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121 | Thread.sleep(1000); |
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122 | } catch (InterruptedException ignored) {} |
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123 | |
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124 | thread.interrupt(); |
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125 | |
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126 | try { |
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127 | thread.join(); |
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128 | } catch (InterruptedException e) { |
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129 | throw new IOException("Unexpected InterruptedException : " + e); |
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130 | } |
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131 | |
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132 | //make sure the channels are still open |
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133 | assertTrue(source.isOpen()); |
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134 | assertTrue(sink.isOpen()); |
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135 | |
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136 | out.close(); |
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137 | assertFalse(sink.isOpen()); |
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138 | |
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139 | // close sink and expect -1 from source.read() |
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140 | assertEquals(-1, in.read()); |
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141 | |
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142 | // make sure close() closes the underlying channel. |
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143 | in.close(); |
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144 | assertFalse(source.isOpen()); |
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145 | |
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146 | } finally { |
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147 | if (source != null) { |
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148 | source.close(); |
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149 | } |
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150 | if (sink != null) { |
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151 | sink.close(); |
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152 | } |
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153 | } |
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154 | } |
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155 | } |
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