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annotate src/org/eclipse/jetty/io/ThreadLocalBuffers.java @ 854:359012f4e797

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author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 20 Sep 2016 01:05:37 -0600
parents 3428c60d7cfc
children
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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 }