annotate src/org/eclipse/jetty/server/handler/HandlerWrapper.java @ 1024:be50ffc0ad5c

remove BufferCache
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 01 Nov 2016 03:46:28 -0600
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1 //
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2 // ========================================================================
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3 // Copyright (c) 1995-2014 Mort Bay Consulting Pty. Ltd.
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4 // ------------------------------------------------------------------------
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5 // All rights reserved. This program and the accompanying materials
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6 // are made available under the terms of the Eclipse Public License v1.0
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7 // and Apache License v2.0 which accompanies this distribution.
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8 //
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9 // The Eclipse Public License is available at
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10 // http://www.eclipse.org/legal/epl-v10.html
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11 //
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12 // The Apache License v2.0 is available at
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13 // http://www.opensource.org/licenses/apache2.0.php
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14 //
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15 // You may elect to redistribute this code under either of these licenses.
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16 // ========================================================================
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17 //
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18
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19 package org.eclipse.jetty.server.handler;
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20
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21 import java.io.IOException;
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22
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23 import javax.servlet.ServletException;
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24 import javax.servlet.http.HttpServletResponse;
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25
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26 import org.eclipse.jetty.server.Handler;
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27 import org.eclipse.jetty.server.Request;
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28 import org.eclipse.jetty.server.Server;
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29 import org.eclipse.jetty.util.component.LifeCycle;
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30
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31 /* ------------------------------------------------------------ */
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32 /** A <code>HandlerWrapper</code> acts as a {@link Handler} but delegates the {@link Handler#handle handle} method and
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33 * {@link LifeCycle life cycle} events to a delegate. This is primarily used to implement the <i>Decorator</i> pattern.
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34 *
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35 */
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36 public class HandlerWrapper extends AbstractHandlerContainer
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37 {
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38 protected Handler _handler;
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39
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40 /* ------------------------------------------------------------ */
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41 /**
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42 *
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43 */
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44 public HandlerWrapper()
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45 {
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46 }
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47
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48 /* ------------------------------------------------------------ */
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49 /**
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50 * @return Returns the handlers.
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51 */
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52 public Handler getHandler()
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53 {
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54 return _handler;
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55 }
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56
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57 /* ------------------------------------------------------------ */
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58 /**
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59 * @return Returns the handlers.
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60 */
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61 public Handler[] getHandlers()
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62 {
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63 if (_handler==null)
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64 return new Handler[0];
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65 return new Handler[] {_handler};
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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 * @param handler Set the {@link Handler} which should be wrapped.
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71 */
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72 public void setHandler(Handler handler)
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73 {
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74 if (isStarted())
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75 throw new IllegalStateException(STARTED);
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76
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77 Handler old_handler = _handler;
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78 _handler = handler;
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79 if (handler!=null)
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80 handler.setServer(getServer());
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81 }
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82
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83 /* ------------------------------------------------------------ */
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84 /*
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85 * @see org.eclipse.thread.AbstractLifeCycle#doStart()
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86 */
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87 @Override
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88 protected void doStart() throws Exception
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89 {
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90 if (_handler!=null)
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91 _handler.start();
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92 super.doStart();
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93 }
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94
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95 /* ------------------------------------------------------------ */
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96 /*
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97 * @see org.eclipse.thread.AbstractLifeCycle#doStop()
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98 */
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99 @Override
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100 protected void doStop() throws Exception
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101 {
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102 if (_handler!=null)
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103 _handler.stop();
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104 super.doStop();
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105 }
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106
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107 @Override
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108 public void handle(String target, Request request, HttpServletResponse response) throws IOException, ServletException
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109 {
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110 if (_handler!=null && isStarted())
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111 {
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112 _handler.handle(target, request, response);
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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 /* ------------------------------------------------------------ */
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118 @Override
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119 public void setServer(Server server)
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120 {
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121 Server old_server=getServer();
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122 if (server==old_server)
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123 return;
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124
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125 if (isStarted())
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126 throw new IllegalStateException(STARTED);
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127
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128 super.setServer(server);
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129
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130 Handler h=getHandler();
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131 if (h!=null)
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132 h.setServer(server);
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133 }
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134
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135
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136 /* ------------------------------------------------------------ */
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137 @Override
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138 protected Object expandChildren(Object list, Class byClass)
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139 {
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140 return expandHandler(_handler,list,byClass);
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141 }
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142
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143 /* ------------------------------------------------------------ */
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144 public <H extends Handler> H getNestedHandlerByClass(Class<H> byclass)
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145 {
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146 HandlerWrapper h=this;
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147 while (h!=null)
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148 {
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149 if (byclass.isInstance(h))
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150 return (H)h;
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151 Handler w = h.getHandler();
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152 if (w instanceof HandlerWrapper)
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153 h=(HandlerWrapper)w;
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154 else break;
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155 }
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156 return null;
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157
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158 }
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159
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160 /* ------------------------------------------------------------ */
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161 @Override
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162 public void destroy()
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163 {
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164 if (!isStopped())
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165 throw new IllegalStateException("!STOPPED");
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166 Handler child=getHandler();
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167 if (child!=null)
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168 {
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169 setHandler(null);
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170 child.destroy();
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171 }
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172 super.destroy();
d9d95acded81 remove ScopedHandler
Franklin Schmidt <fschmidt@gmail.com>
parents: 848
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173 }
802
3428c60d7cfc replace jetty jars with source
Franklin Schmidt <fschmidt@gmail.com>
parents:
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174
3428c60d7cfc replace jetty jars with source
Franklin Schmidt <fschmidt@gmail.com>
parents:
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175 }