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.ipc; |
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19 | |
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20 | import java.io.IOException; |
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21 | import java.net.InetSocketAddress; |
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22 | import java.net.Socket; |
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23 | import java.net.SocketAddress; |
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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.hadoop.conf.Configuration; |
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28 | import org.apache.hadoop.hdfs.DistributedFileSystem; |
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29 | import org.apache.hadoop.hdfs.MiniDFSCluster; |
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30 | import org.apache.hadoop.fs.FileSystem; |
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31 | import org.apache.hadoop.fs.Path; |
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32 | import org.apache.hadoop.mapred.JobClient; |
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33 | import org.apache.hadoop.mapred.JobConf; |
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34 | import org.apache.hadoop.mapred.JobStatus; |
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35 | import org.apache.hadoop.mapred.MiniMRCluster; |
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36 | import org.apache.hadoop.net.StandardSocketFactory; |
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37 | |
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38 | /** |
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39 | * This class checks that RPCs can use specialized socket factories. |
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40 | */ |
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41 | public class TestSocketFactory extends TestCase { |
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42 | |
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43 | /** |
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44 | * Check that we can reach a NameNode or a JobTracker using a specific |
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45 | * socket factory |
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46 | */ |
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47 | public void testSocketFactory() throws IOException { |
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48 | // Create a standard mini-cluster |
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49 | Configuration sconf = new Configuration(); |
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50 | MiniDFSCluster cluster = new MiniDFSCluster(sconf, 1, true, null); |
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51 | final int nameNodePort = cluster.getNameNodePort(); |
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52 | |
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53 | // Get a reference to its DFS directly |
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54 | FileSystem fs = cluster.getFileSystem(); |
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55 | assertTrue(fs instanceof DistributedFileSystem); |
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56 | DistributedFileSystem directDfs = (DistributedFileSystem) fs; |
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57 | |
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58 | // Get another reference via network using a specific socket factory |
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59 | Configuration cconf = new Configuration(); |
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60 | FileSystem.setDefaultUri(cconf, String.format("hdfs://localhost:%s/", |
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61 | nameNodePort + 10)); |
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62 | cconf.set("hadoop.rpc.socket.factory.class.default", |
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63 | "org.apache.hadoop.ipc.DummySocketFactory"); |
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64 | cconf.set("hadoop.rpc.socket.factory.class.ClientProtocol", |
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65 | "org.apache.hadoop.ipc.DummySocketFactory"); |
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66 | cconf.set("hadoop.rpc.socket.factory.class.JobSubmissionProtocol", |
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67 | "org.apache.hadoop.ipc.DummySocketFactory"); |
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68 | |
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69 | fs = FileSystem.get(cconf); |
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70 | assertTrue(fs instanceof DistributedFileSystem); |
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71 | DistributedFileSystem dfs = (DistributedFileSystem) fs; |
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72 | |
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73 | JobClient client = null; |
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74 | MiniMRCluster mr = null; |
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75 | try { |
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76 | // This will test RPC to the NameNode only. |
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77 | // could we test Client-DataNode connections? |
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78 | Path filePath = new Path("/dir"); |
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79 | |
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80 | assertFalse(directDfs.exists(filePath)); |
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81 | assertFalse(dfs.exists(filePath)); |
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82 | |
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83 | directDfs.mkdirs(filePath); |
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84 | assertTrue(directDfs.exists(filePath)); |
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85 | assertTrue(dfs.exists(filePath)); |
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86 | |
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87 | // This will test TPC to a JobTracker |
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88 | fs = FileSystem.get(sconf); |
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89 | mr = new MiniMRCluster(1, fs.getUri().toString(), 1); |
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90 | final int jobTrackerPort = mr.getJobTrackerPort(); |
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91 | |
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92 | JobConf jconf = new JobConf(cconf); |
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93 | jconf.set("mapred.job.tracker", String.format("localhost:%d", |
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94 | jobTrackerPort + 10)); |
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95 | client = new JobClient(jconf); |
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96 | |
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97 | JobStatus[] jobs = client.jobsToComplete(); |
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98 | assertTrue(jobs.length == 0); |
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99 | |
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100 | } finally { |
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101 | try { |
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102 | if (client != null) |
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103 | client.close(); |
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104 | } catch (Exception ignored) { |
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105 | // nothing we can do |
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106 | ignored.printStackTrace(); |
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107 | } |
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108 | try { |
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109 | if (dfs != null) |
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110 | dfs.close(); |
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111 | |
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112 | } catch (Exception ignored) { |
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113 | // nothing we can do |
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114 | ignored.printStackTrace(); |
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115 | } |
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116 | try { |
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117 | if (directDfs != null) |
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118 | directDfs.close(); |
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119 | |
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120 | } catch (Exception ignored) { |
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121 | // nothing we can do |
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122 | ignored.printStackTrace(); |
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123 | } |
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124 | try { |
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125 | if (cluster != null) |
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126 | cluster.shutdown(); |
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127 | |
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128 | } catch (Exception ignored) { |
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129 | // nothing we can do |
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130 | ignored.printStackTrace(); |
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131 | } |
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132 | if (mr != null) { |
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133 | try { |
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134 | mr.shutdown(); |
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135 | } catch (Exception ignored) { |
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136 | ignored.printStackTrace(); |
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137 | } |
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138 | } |
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139 | } |
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140 | } |
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141 | } |
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142 | |
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143 | /** |
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144 | * Dummy socket factory which shift TPC ports by subtracting 10 when |
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145 | * establishing a connection |
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146 | */ |
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147 | class DummySocketFactory extends StandardSocketFactory { |
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148 | /** |
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149 | * Default empty constructor (for use with the reflection API). |
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150 | */ |
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151 | public DummySocketFactory() { |
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152 | } |
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153 | |
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154 | /* @inheritDoc */ |
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155 | @Override |
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156 | public Socket createSocket() throws IOException { |
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157 | return new Socket() { |
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158 | @Override |
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159 | public void connect(SocketAddress addr, int timeout) |
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160 | throws IOException { |
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161 | |
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162 | assert (addr instanceof InetSocketAddress); |
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163 | InetSocketAddress iaddr = (InetSocketAddress) addr; |
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164 | SocketAddress newAddr = null; |
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165 | if (iaddr.isUnresolved()) |
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166 | newAddr = |
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167 | new InetSocketAddress(iaddr.getHostName(), |
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168 | iaddr.getPort() - 10); |
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169 | else |
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170 | newAddr = |
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171 | new InetSocketAddress(iaddr.getAddress(), iaddr.getPort() - 10); |
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172 | System.out.printf("Test socket: rerouting %s to %s\n", iaddr, |
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173 | newAddr); |
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174 | super.connect(newAddr, timeout); |
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175 | } |
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176 | }; |
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177 | } |
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178 | |
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179 | /* @inheritDoc */ |
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180 | @Override |
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181 | public boolean equals(Object obj) { |
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182 | if (this == obj) |
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183 | return true; |
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184 | if (obj == null) |
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185 | return false; |
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186 | if (!(obj instanceof DummySocketFactory)) |
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187 | return false; |
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188 | return true; |
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189 | } |
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190 | |
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191 | /* @inheritDoc */ |
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192 | @Override |
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193 | public int hashCode() { |
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194 | // Dummy hash code (to make find bugs happy) |
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195 | return 53; |
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196 | } |
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197 | } |
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