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 | |
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19 | package org.apache.hadoop.ipc; |
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20 | |
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21 | import java.io.IOException; |
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22 | import java.net.InetSocketAddress; |
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23 | import java.util.Random; |
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24 | |
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25 | import junit.framework.TestCase; |
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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 | import org.apache.hadoop.conf.Configuration; |
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30 | import org.apache.hadoop.io.BytesWritable; |
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31 | import org.apache.hadoop.io.Writable; |
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32 | import org.apache.hadoop.net.NetUtils; |
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33 | |
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34 | /** |
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35 | * This test provokes partial writes in the server, which is |
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36 | * serving multiple clients. |
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37 | */ |
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38 | public class TestIPCServerResponder extends TestCase { |
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39 | |
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40 | public static final Log LOG = |
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41 | LogFactory.getLog(TestIPCServerResponder.class); |
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42 | |
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43 | private static Configuration conf = new Configuration(); |
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44 | |
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45 | public TestIPCServerResponder(final String name) { |
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46 | super(name); |
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47 | } |
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48 | |
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49 | private static final Random RANDOM = new Random(); |
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50 | |
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51 | private static final String ADDRESS = "0.0.0.0"; |
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52 | |
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53 | private static final int BYTE_COUNT = 1024; |
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54 | private static final byte[] BYTES = new byte[BYTE_COUNT]; |
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55 | static { |
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56 | for (int i = 0; i < BYTE_COUNT; i++) |
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57 | BYTES[i] = (byte) ('a' + (i % 26)); |
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58 | } |
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59 | |
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60 | private static class TestServer extends Server { |
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61 | |
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62 | private boolean sleep; |
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63 | |
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64 | public TestServer(final int handlerCount, final boolean sleep) |
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65 | throws IOException { |
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66 | super(ADDRESS, 0, BytesWritable.class, handlerCount, conf); |
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67 | // Set the buffer size to half of the maximum parameter/result size |
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68 | // to force the socket to block |
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69 | this.setSocketSendBufSize(BYTE_COUNT / 2); |
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70 | this.sleep = sleep; |
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71 | } |
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72 | |
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73 | @Override |
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74 | public Writable call(Class<?> protocol, Writable param, long receiveTime) |
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75 | throws IOException { |
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76 | if (sleep) { |
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77 | try { |
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78 | Thread.sleep(RANDOM.nextInt(20)); // sleep a bit |
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79 | } catch (InterruptedException e) {} |
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80 | } |
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81 | return param; |
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82 | } |
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83 | } |
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84 | |
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85 | private static class Caller extends Thread { |
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86 | |
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87 | private Client client; |
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88 | private int count; |
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89 | private InetSocketAddress address; |
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90 | private boolean failed; |
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91 | |
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92 | public Caller(final Client client, final InetSocketAddress address, |
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93 | final int count) { |
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94 | this.client = client; |
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95 | this.address = address; |
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96 | this.count = count; |
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97 | } |
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98 | |
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99 | @Override |
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100 | public void run() { |
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101 | for (int i = 0; i < count; i++) { |
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102 | try { |
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103 | int byteSize = RANDOM.nextInt(BYTE_COUNT); |
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104 | byte[] bytes = new byte[byteSize]; |
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105 | System.arraycopy(BYTES, 0, bytes, 0, byteSize); |
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106 | Writable param = new BytesWritable(bytes); |
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107 | Writable value = client.call(param, address); |
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108 | Thread.sleep(RANDOM.nextInt(20)); |
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109 | } catch (Exception e) { |
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110 | LOG.fatal("Caught: " + e); |
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111 | failed = true; |
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112 | } |
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113 | } |
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114 | } |
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115 | } |
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116 | |
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117 | public void testServerResponder() throws Exception { |
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118 | testServerResponder(10, true, 1, 10, 200); |
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119 | } |
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120 | |
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121 | public void testServerResponder(final int handlerCount, |
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122 | final boolean handlerSleep, |
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123 | final int clientCount, |
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124 | final int callerCount, |
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125 | final int callCount) throws Exception { |
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126 | Server server = new TestServer(handlerCount, handlerSleep); |
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127 | server.start(); |
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128 | |
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129 | InetSocketAddress address = NetUtils.getConnectAddress(server); |
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130 | Client[] clients = new Client[clientCount]; |
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131 | for (int i = 0; i < clientCount; i++) { |
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132 | clients[i] = new Client(BytesWritable.class, conf); |
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133 | } |
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134 | |
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135 | Caller[] callers = new Caller[callerCount]; |
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136 | for (int i = 0; i < callerCount; i++) { |
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137 | callers[i] = new Caller(clients[i % clientCount], address, callCount); |
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138 | callers[i].start(); |
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139 | } |
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140 | for (int i = 0; i < callerCount; i++) { |
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141 | callers[i].join(); |
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142 | assertFalse(callers[i].failed); |
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143 | } |
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144 | for (int i = 0; i < clientCount; i++) { |
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145 | clients[i].stop(); |
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146 | } |
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147 | server.stop(); |
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148 | } |
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149 | |
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150 | } |
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