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115 | office | 1 | <?php |
2 | /* |
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3 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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4 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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5 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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6 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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7 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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8 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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9 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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10 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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11 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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12 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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13 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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14 | * |
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15 | * This software consists of voluntary contributions made by many individuals |
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16 | * and is licensed under the MIT license. For more information, see |
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17 | * <http://www.doctrine-project.org>. |
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18 | */ |
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19 | |||
20 | namespace Doctrine\Common\Cache; |
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21 | |||
22 | /** |
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23 | * Cache provider that allows to easily chain multiple cache providers |
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24 | * |
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25 | * @author Michaƫl Gallego <mic.gallego@gmail.com> |
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26 | */ |
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27 | class ChainCache extends CacheProvider |
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28 | { |
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29 | /** |
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30 | * @var CacheProvider[] |
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31 | */ |
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32 | private $cacheProviders = array(); |
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33 | |||
34 | /** |
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35 | * Constructor |
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36 | * |
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37 | * @param CacheProvider[] $cacheProviders |
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38 | */ |
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39 | public function __construct($cacheProviders = array()) |
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40 | { |
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41 | $this->cacheProviders = $cacheProviders; |
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42 | } |
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43 | |||
44 | /** |
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45 | * {@inheritDoc} |
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46 | */ |
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47 | public function setNamespace($namespace) |
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48 | { |
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49 | parent::setNamespace($namespace); |
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50 | |||
51 | foreach ($this->cacheProviders as $cacheProvider) { |
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52 | $cacheProvider->setNamespace($namespace); |
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53 | } |
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54 | } |
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55 | |||
56 | /** |
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57 | * {@inheritDoc} |
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58 | */ |
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59 | protected function doFetch($id) |
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60 | { |
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61 | foreach ($this->cacheProviders as $key => $cacheProvider) { |
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62 | if ($cacheProvider->doContains($id)) { |
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63 | $value = $cacheProvider->doFetch($id); |
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64 | |||
65 | // We populate all the previous cache layers (that are assumed to be faster) |
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66 | for ($subKey = $key - 1 ; $subKey >= 0 ; $subKey--) { |
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67 | $this->cacheProviders[$subKey]->doSave($id, $value); |
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68 | } |
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69 | |||
70 | return $value; |
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71 | } |
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72 | } |
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73 | |||
74 | return false; |
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75 | } |
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76 | |||
77 | /** |
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78 | * {@inheritDoc} |
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79 | */ |
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80 | protected function doContains($id) |
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81 | { |
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82 | foreach ($this->cacheProviders as $cacheProvider) { |
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83 | if ($cacheProvider->doContains($id)) { |
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84 | return true; |
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85 | } |
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86 | } |
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87 | |||
88 | return false; |
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89 | } |
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90 | |||
91 | /** |
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92 | * {@inheritDoc} |
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93 | */ |
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94 | protected function doSave($id, $data, $lifeTime = 0) |
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95 | { |
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96 | $stored = true; |
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97 | |||
98 | foreach ($this->cacheProviders as $cacheProvider) { |
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99 | $stored = $cacheProvider->doSave($id, $data, $lifeTime) && $stored; |
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100 | } |
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101 | |||
102 | return $stored; |
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103 | } |
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104 | |||
105 | /** |
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106 | * {@inheritDoc} |
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107 | */ |
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108 | protected function doDelete($id) |
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109 | { |
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110 | $deleted = true; |
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111 | |||
112 | foreach ($this->cacheProviders as $cacheProvider) { |
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113 | $deleted = $cacheProvider->doDelete($id) && $deleted; |
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114 | } |
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115 | |||
116 | return $deleted; |
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117 | } |
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118 | |||
119 | /** |
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120 | * {@inheritDoc} |
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121 | */ |
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122 | protected function doFlush() |
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123 | { |
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124 | $flushed = true; |
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125 | |||
126 | foreach ($this->cacheProviders as $cacheProvider) { |
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127 | $flushed = $cacheProvider->doFlush() && $flushed; |
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128 | } |
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129 | |||
130 | return $flushed; |
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131 | } |
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132 | |||
133 | /** |
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134 | * {@inheritDoc} |
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135 | */ |
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136 | protected function doGetStats() |
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137 | { |
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138 | // We return all the stats from all adapters |
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139 | $stats = array(); |
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140 | |||
141 | foreach ($this->cacheProviders as $cacheProvider) { |
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142 | $stats[] = $cacheProvider->doGetStats(); |
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143 | } |
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144 | |||
145 | return $stats; |
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146 | } |
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147 | } |