Mercurial > hg > blitz_stable
annotate src/com/go/trove/net/MultiPooledSocketFactory.java @ 35:6f68e94c1fb8 default tip
Add CondensedStats monitoring utility, equivalent to vmstat
author | Dominic Cleal <dominic-cleal@cdo2.com> |
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date | Thu, 05 Aug 2010 11:07:25 +0100 |
parents | 3dc0c5604566 |
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1 /* ==================================================================== |
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2 * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group |
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3 * ==================================================================== |
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4 * The Tea Software License, Version 1.1 |
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5 * |
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6 * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved. |
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7 * |
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8 * Redistribution and use in source and binary forms, with or without |
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9 * modification, are permitted provided that the following conditions |
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10 * are met: |
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11 * |
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12 * 1. Redistributions of source code must retain the above copyright |
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13 * notice, this list of conditions and the following disclaimer. |
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14 * |
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15 * 2. Redistributions in binary form must reproduce the above copyright |
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16 * notice, this list of conditions and the following disclaimer in |
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17 * the documentation and/or other materials provided with the |
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18 * distribution. |
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19 * |
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20 * 3. The end-user documentation included with the redistribution, |
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21 * if any, must include the following acknowledgment: |
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22 * "This product includes software developed by the |
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23 * Walt Disney Internet Group (http://opensource.go.com/)." |
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24 * Alternately, this acknowledgment may appear in the software itself, |
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25 * if and wherever such third-party acknowledgments normally appear. |
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26 * |
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27 * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must |
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28 * not be used to endorse or promote products derived from this |
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29 * software without prior written permission. For written |
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30 * permission, please contact opensource@dig.com. |
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31 * |
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32 * 5. Products derived from this software may not be called "Tea", |
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33 * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet", |
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34 * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior |
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35 * written permission of the Walt Disney Internet Group. |
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36 * |
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37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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40 * DISCLAIMED. IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS |
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41 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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42 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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43 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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44 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
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45 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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46 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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47 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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48 * ==================================================================== |
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49 * |
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50 * For more information about Tea, please see http://opensource.go.com/. |
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51 */ |
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52 |
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53 package com.go.trove.net; |
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54 |
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55 import java.net.*; |
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56 import java.util.*; |
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57 |
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58 /****************************************************************************** |
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59 * Pooled SocketFactory implementation that connects to multiple hosts that may |
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60 * resolve to multiple InetAddresses. If running under Java 2, version 1.3, |
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61 * changes in the address resolution are automatically detected using |
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62 * {@link InetAddressResolver}. |
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63 * <p> |
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64 * Consider wrapping with a {@link LazySocketFactory} for automatic checking |
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65 * against socket factories that may be dead. |
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66 * |
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67 * @author Brian S O'Neill |
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68 * @version |
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69 * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 00/12/12 <!-- $--> |
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70 */ |
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71 public class MultiPooledSocketFactory extends DistributedSocketFactory { |
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72 // Just references InetAddressResolvers to keep them from going away. |
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73 private Object[] mResolvers; |
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74 |
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75 /** |
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76 * @param hosts hosts to connect to; length matches ports |
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77 * @param ports ports to connect to; length matches hosts |
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78 * @param timeout Maximum time to wait (in milliseconds) for new |
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79 * connections to be established before throwing an exception |
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80 */ |
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81 public MultiPooledSocketFactory(String[] hosts, |
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82 int[] ports, |
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83 long timeout) { |
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84 super(timeout); |
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85 |
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86 try { |
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87 mResolvers = new InetAddressResolver[hosts.length]; |
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88 for (int i=0; i<hosts.length; i++) { |
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89 Listener listener = new Listener(ports[i], timeout); |
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90 mResolvers[i] = |
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91 InetAddressResolver.listenFor(hosts[i], listener); |
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92 } |
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93 } |
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94 catch (NoClassDefFoundError e) { |
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95 // Timer class probably wasn't found, so InetAddressResolver |
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96 // cannot be used. |
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97 mResolvers = null; |
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98 for (int i=0; i<hosts.length; i++) { |
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99 Listener listener = new Listener(ports[i], timeout); |
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100 try { |
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101 listener.resolved(InetAddress.getAllByName(hosts[i])); |
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102 } |
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103 catch (UnknownHostException e2) { |
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104 listener.unknown(e2); |
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105 } |
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106 } |
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107 } |
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108 } |
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109 |
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110 /** |
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111 * Create socket factories for newly resolved addresses. Default |
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112 * implementation returns a LazySocketFactory wrapping a |
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113 * PooledSocketFactory wrapping a PlainSocketFactory. |
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114 */ |
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115 protected SocketFactory createSocketFactory(InetAddress address, |
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116 int port, long timeout) |
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117 { |
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118 SocketFactory factory; |
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119 factory = new PlainSocketFactory(address, port, timeout); |
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120 factory = new PooledSocketFactory(factory); |
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121 factory = new LazySocketFactory(factory); |
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122 return factory; |
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123 } |
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124 |
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125 private class Listener implements InetAddressListener { |
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126 private final int mPort; |
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127 private final long mTimeout; |
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128 |
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129 // Maps InetAddress objects to SocketFactories. |
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130 private Map mAddressedFactories; |
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131 |
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132 public Listener(int port, long timeout) { |
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133 mPort = port; |
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134 mTimeout = timeout; |
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135 mAddressedFactories = new HashMap(); |
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136 } |
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137 |
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138 public void unknown(UnknownHostException e) { |
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139 Thread t = Thread.currentThread(); |
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140 t.getThreadGroup().uncaughtException(t, e); |
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141 |
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142 // Remove all the addressed factories. |
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143 Iterator it = mAddressedFactories.keySet().iterator(); |
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144 while (it.hasNext()) { |
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145 SocketFactory factory = |
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146 (SocketFactory)mAddressedFactories.get(it.next()); |
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147 removeSocketFactory(factory); |
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148 } |
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149 } |
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150 |
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151 public void resolved(InetAddress[] addresses) { |
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152 // Add newly discovered addresses. |
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153 for (int i=0; i<addresses.length; i++) { |
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154 InetAddress address = addresses[i]; |
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155 if (!mAddressedFactories.containsKey(address)) { |
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156 SocketFactory factory = |
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157 createSocketFactory(address, mPort, mTimeout); |
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158 mAddressedFactories.put(address, factory); |
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159 addSocketFactory(factory); |
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160 } |
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161 } |
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162 |
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163 // Remove addresses no longer being routed to. |
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164 Iterator it = mAddressedFactories.keySet().iterator(); |
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165 mainLoop: |
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166 while (it.hasNext()) { |
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167 InetAddress address = (InetAddress)it.next(); |
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168 for (int i=0; i<addresses.length; i++) { |
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169 if (addresses[i].equals(address)) { |
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170 continue mainLoop; |
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171 } |
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172 } |
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173 SocketFactory factory = |
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174 (SocketFactory)mAddressedFactories.get(address); |
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175 removeSocketFactory(factory); |
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176 } |
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177 } |
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178 } |
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179 } |