Mercurial Hosting > luan
annotate src/org/eclipse/jetty/server/AsyncHttpConnection.java @ 960:3cd4c706a61f
simplify ChannelEndPoint
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Thu, 13 Oct 2016 21:29:19 -0600 |
parents | 1094975d013b |
children | 4b6216fa9cec |
rev | line source |
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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; |
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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 org.eclipse.jetty.http.HttpException; |
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24 import org.eclipse.jetty.http.HttpStatus; |
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25 import org.eclipse.jetty.io.AsyncEndPoint; |
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26 import org.eclipse.jetty.io.Connection; |
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27 import org.eclipse.jetty.io.EndPoint; |
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28 import org.eclipse.jetty.io.nio.AsyncConnection; |
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29 import org.eclipse.jetty.io.nio.SelectChannelEndPoint; |
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30 import org.slf4j.Logger; |
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31 import org.slf4j.LoggerFactory; |
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32 |
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33 |
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34 /* ------------------------------------------------------------ */ |
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35 /** Asychronous Server HTTP connection |
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36 * |
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37 */ |
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38 public class AsyncHttpConnection extends AbstractHttpConnection implements AsyncConnection |
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39 { |
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40 private final static int NO_PROGRESS_INFO = Integer.getInteger("org.mortbay.jetty.NO_PROGRESS_INFO",100); |
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41 private final static int NO_PROGRESS_CLOSE = Integer.getInteger("org.mortbay.jetty.NO_PROGRESS_CLOSE",200); |
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42 |
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43 private static final Logger LOG = LoggerFactory.getLogger(AsyncHttpConnection.class); |
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44 private int _total_no_progress; |
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45 private final AsyncEndPoint _asyncEndp; |
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46 private boolean _readInterested = true; |
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47 |
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48 public AsyncHttpConnection(Connector connector, EndPoint endpoint, Server server) |
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49 { |
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50 super(connector,endpoint,server); |
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51 _asyncEndp=(AsyncEndPoint)endpoint; |
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52 } |
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53 |
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54 @Override |
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55 public Connection handle() throws IOException |
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56 { |
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57 Connection connection = this; |
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58 boolean some_progress=false; |
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59 boolean progress=true; |
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60 |
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61 try |
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62 { |
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63 setCurrentConnection(this); |
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64 |
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65 // While progress and the connection has not changed |
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66 while (progress && connection==this) |
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67 { |
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68 progress=false; |
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69 try |
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70 { |
928 | 71 // Parse more input |
72 if (!_parser.isComplete() && _parser.parseAvailable()) | |
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73 progress=true; |
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74 |
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75 // Generate more output |
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76 if (_generator.isCommitted() && !_generator.isComplete() && !_endp.isOutputShutdown()) |
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77 if (_generator.flushBuffer()>0) |
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78 progress=true; |
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79 |
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80 // Flush output |
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81 _endp.flush(); |
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82 |
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83 // Has any IO been done by the endpoint itself since last loop |
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84 if (_asyncEndp.hasProgressed()) |
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85 progress=true; |
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86 } |
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87 catch (HttpException e) |
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88 { |
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89 if (LOG.isDebugEnabled()) |
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90 { |
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91 LOG.debug("uri="+_uri); |
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92 LOG.debug("fields="+_requestFields); |
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93 LOG.debug("",e); |
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94 } |
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95 progress=true; |
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96 _generator.sendError(e.getStatus(), e.getReason(), null, true); |
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97 } |
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98 finally |
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99 { |
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100 some_progress|=progress; |
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101 // Is this request/response round complete and are fully flushed? |
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102 boolean parserComplete = _parser.isComplete(); |
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103 boolean generatorComplete = _generator.isComplete(); |
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104 boolean complete = parserComplete && generatorComplete; |
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105 if (parserComplete) |
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106 { |
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107 if (generatorComplete) |
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108 { |
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109 // Reset the parser/generator |
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110 progress=true; |
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111 |
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112 // look for a switched connection instance? |
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113 if (_response.getStatus()==HttpStatus.SWITCHING_PROTOCOLS_101) |
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114 { |
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115 Connection switched=(Connection)_request.getAttribute("org.eclipse.jetty.io.Connection"); |
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116 if (switched!=null) |
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117 connection=switched; |
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118 } |
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119 |
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120 reset(); |
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121 |
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122 // TODO Is this still required? |
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123 if (!_generator.isPersistent() && !_endp.isOutputShutdown()) |
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124 { |
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125 LOG.warn("Safety net oshut!!! IF YOU SEE THIS, PLEASE RAISE BUGZILLA"); |
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126 _endp.shutdownOutput(); |
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127 } |
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128 } |
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129 else |
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130 { |
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131 // We have finished parsing, but not generating so |
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132 // we must not be interested in reading until we |
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133 // have finished generating and we reset the generator |
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134 _readInterested = false; |
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135 LOG.debug("Disabled read interest while writing response {}", _endp); |
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136 } |
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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 finally |
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142 { |
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143 setCurrentConnection(null); |
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144 |
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145 // return buffers |
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146 _parser.returnBuffers(); |
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147 _generator.returnBuffers(); |
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148 |
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149 // Safety net to catch spinning |
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150 if (some_progress) |
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151 _total_no_progress=0; |
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152 else |
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153 { |
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154 _total_no_progress++; |
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155 if (NO_PROGRESS_INFO>0 && _total_no_progress%NO_PROGRESS_INFO==0 && (NO_PROGRESS_CLOSE<=0 || _total_no_progress< NO_PROGRESS_CLOSE)) |
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156 LOG.info("EndPoint making no progress: "+_total_no_progress+" "+_endp+" "+this); |
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157 if (NO_PROGRESS_CLOSE>0 && _total_no_progress==NO_PROGRESS_CLOSE) |
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158 { |
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159 LOG.warn("Closing EndPoint making no progress: "+_total_no_progress+" "+_endp+" "+this); |
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160 if (_endp instanceof SelectChannelEndPoint) |
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161 ((SelectChannelEndPoint)_endp).getChannel().close(); |
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162 } |
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163 } |
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164 } |
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165 return connection; |
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166 } |
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167 |
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168 public void onInputShutdown() throws IOException |
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169 { |
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170 // If we don't have a committed response and we are not suspended |
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171 if (_generator.isIdle()) |
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172 { |
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173 // then no more can happen, so close. |
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174 _endp.close(); |
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175 } |
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176 |
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177 // Make idle parser seek EOF |
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178 if (_parser.isIdle()) |
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179 _parser.setPersistent(false); |
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180 } |
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181 |
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182 @Override |
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183 public void reset() |
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184 { |
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185 _readInterested = true; |
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186 LOG.debug("Enabled read interest {}", _endp); |
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187 super.reset(); |
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188 } |
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189 |
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190 @Override |
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191 public boolean isSuspended() |
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192 { |
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193 return !_readInterested || super.isSuspended(); |
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194 } |
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195 } |