Mercurial Hosting > luan
annotate src/org/eclipse/jetty/io/ThreadLocalBuffers.java @ 814:95cbe23a96fb
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author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Fri, 09 Sep 2016 10:37:37 -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.io; |
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20 |
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21 |
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22 |
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23 /* ------------------------------------------------------------ */ |
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24 /** Abstract Buffer pool. |
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25 * simple unbounded pool of buffers for header, request and response sizes. |
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26 * |
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27 */ |
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28 public class ThreadLocalBuffers extends AbstractBuffers |
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29 { |
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30 /* ------------------------------------------------------------ */ |
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31 private final ThreadLocal<ThreadBuffers> _buffers=new ThreadLocal<ThreadBuffers>() |
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32 { |
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33 @Override |
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34 protected ThreadBuffers initialValue() |
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35 { |
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36 return new ThreadBuffers(); |
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37 } |
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38 }; |
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39 |
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40 /* ------------------------------------------------------------ */ |
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41 public ThreadLocalBuffers(Buffers.Type headerType, int headerSize, Buffers.Type bufferType, int bufferSize, Buffers.Type otherType) |
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42 { |
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43 super(headerType,headerSize,bufferType,bufferSize,otherType); |
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44 } |
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45 |
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46 /* ------------------------------------------------------------ */ |
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47 public Buffer getBuffer() |
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48 { |
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49 ThreadBuffers buffers = _buffers.get(); |
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50 if (buffers._buffer!=null) |
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51 { |
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52 Buffer b=buffers._buffer; |
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53 buffers._buffer=null; |
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54 return b; |
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55 } |
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56 |
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57 if (buffers._other!=null && isBuffer(buffers._other)) |
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58 { |
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59 Buffer b=buffers._other; |
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60 buffers._other=null; |
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61 return b; |
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62 } |
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63 |
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64 return newBuffer(); |
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65 } |
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66 |
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67 /* ------------------------------------------------------------ */ |
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68 public Buffer getHeader() |
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69 { |
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70 ThreadBuffers buffers = _buffers.get(); |
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71 if (buffers._header!=null) |
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72 { |
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73 Buffer b=buffers._header; |
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74 buffers._header=null; |
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75 return b; |
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76 } |
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77 |
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78 if (buffers._other!=null && isHeader(buffers._other)) |
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79 { |
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80 Buffer b=buffers._other; |
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81 buffers._other=null; |
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82 return b; |
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83 } |
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84 |
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85 return newHeader(); |
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86 } |
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87 |
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88 /* ------------------------------------------------------------ */ |
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89 public Buffer getBuffer(int size) |
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90 { |
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91 ThreadBuffers buffers = _buffers.get(); |
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92 if (buffers._other!=null && buffers._other.capacity()==size) |
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93 { |
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94 Buffer b=buffers._other; |
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95 buffers._other=null; |
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96 return b; |
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97 } |
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98 |
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99 return newBuffer(size); |
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100 } |
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101 |
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102 /* ------------------------------------------------------------ */ |
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103 public void returnBuffer(Buffer buffer) |
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104 { |
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105 buffer.clear(); |
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106 if (buffer.isVolatile() || buffer.isImmutable()) |
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107 return; |
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108 |
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109 ThreadBuffers buffers = _buffers.get(); |
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110 |
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111 if (buffers._header==null && isHeader(buffer)) |
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112 buffers._header=buffer; |
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113 else if (buffers._buffer==null && isBuffer(buffer)) |
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114 buffers._buffer=buffer; |
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115 else |
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116 buffers._other=buffer; |
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117 } |
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118 |
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119 |
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120 /* ------------------------------------------------------------ */ |
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121 @Override |
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122 public String toString() |
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123 { |
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124 return "{{"+getHeaderSize()+","+getBufferSize()+"}}"; |
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125 } |
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126 |
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127 /* ------------------------------------------------------------ */ |
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128 /* ------------------------------------------------------------ */ |
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129 protected static class ThreadBuffers |
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130 { |
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131 Buffer _buffer; |
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132 Buffer _header; |
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133 Buffer _other; |
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134 } |
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135 } |