Mercurial > hg > blitz_stable

annotate src/com/go/trove/net/LazySocketFactory.java @ 27:511648fa4d64 Version 2.1

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Version to 2.1
author Dan Creswell <dan.creswell@gmail.com>
date Mon, 04 Jan 2010 13:00:40 +0000
parents 3dc0c5604566
children
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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
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57 /******************************************************************************
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58 * A socket implementation that lazily establishs a connection. It only
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59 * connects when actually needed. Setting options and getting I/O streams will
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60 * not force a connection to be established. As soon as a read or write
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61 * operation is performed, a connection is established.
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62 * <p>
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63 * If the first write operation requires a connection to be established, then a
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64 * recycled connection is requested. The connection is tested by writing the
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65 * data to it. If this fails, a new connection is requested and the operation
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66 * is tried again.
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67 *
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68 * @author Brian S O'Neill
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69 * @version
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70 * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 00/12/05 <!-- $-->
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71 */
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72 public class LazySocketFactory implements SocketFactory {
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73 private final SocketFactory mFactory;
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74
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75 public LazySocketFactory(SocketFactory factory) {
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76 mFactory = factory;
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77 }
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78
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79 public InetAddressAndPort getInetAddressAndPort() {
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80 return mFactory.getInetAddressAndPort();
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81 }
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82
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83 public InetAddressAndPort getInetAddressAndPort(Object session) {
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84 return mFactory.getInetAddressAndPort(session);
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85 }
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86
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87 public long getDefaultTimeout() {
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88 return mFactory.getDefaultTimeout();
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89 }
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90
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91 public CheckedSocket createSocket()
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92 throws ConnectException, SocketException
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93 {
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94 return mFactory.createSocket();
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95 }
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96
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97 public CheckedSocket createSocket(Object session)
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98 throws ConnectException, SocketException
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99 {
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100 return mFactory.createSocket(session);
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101 }
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102
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103 public CheckedSocket createSocket(long timeout)
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104 throws ConnectException, SocketException
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105 {
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106 return mFactory.createSocket(timeout);
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107 }
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108
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109 public CheckedSocket createSocket(Object session, long timeout)
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110 throws ConnectException, SocketException
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111 {
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112 return mFactory.createSocket(session, timeout);
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113 }
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114
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115 /**
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116 * Returns a socket that will lazily connect.
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117 */
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118 public CheckedSocket getSocket() throws ConnectException, SocketException {
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119 return CheckedSocket.check(new LazySocket(mFactory));
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120 }
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121
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122 /**
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123 * Returns a socket that will lazily connect.
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124 */
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125 public CheckedSocket getSocket(Object session)
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126 throws ConnectException, SocketException
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127 {
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128 return CheckedSocket.check(new LazySocket(mFactory, session));
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129 }
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130
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131 /**
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132 * Returns a socket that will lazily connect.
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133 */
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134 public CheckedSocket getSocket(long timeout)
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135 throws ConnectException, SocketException
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136 {
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137 return CheckedSocket.check(new LazySocket(mFactory, timeout));
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138 }
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139
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140 /**
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141 * Returns a socket that will lazily connect.
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142 */
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143 public CheckedSocket getSocket(Object session, long timeout)
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144 throws ConnectException, SocketException
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145 {
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146 return CheckedSocket.check(new LazySocket(mFactory, session, timeout));
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147 }
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148
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149 public void recycleSocket(CheckedSocket cs)
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150 throws SocketException, IllegalArgumentException
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151 {
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152 if (cs == null) {
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153 return;
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154 }
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155
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156 // Bust through two layers of wrapping to get at actual socket.
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157
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158 Socket s = cs.mSocket;
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159 if (s instanceof LazySocket) {
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160 cs = ((LazySocket)s).recycle();
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161 if (cs == null) {
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162 return;
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163 }
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164 }
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165
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166 mFactory.recycleSocket(cs);
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167 }
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168
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169 public void clear() {
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170 mFactory.clear();
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171 }
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172
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173 public int getAvailableCount(){
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174 return mFactory.getAvailableCount();
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175 }
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176 }