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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 | use \Memcache; |
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23 | |||
24 | /** |
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25 | * Memcache cache provider. |
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26 | * |
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27 | * @link www.doctrine-project.org |
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28 | * @since 2.0 |
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29 | * @author Benjamin Eberlei <kontakt@beberlei.de> |
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30 | * @author Guilherme Blanco <guilhermeblanco@hotmail.com> |
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31 | * @author Jonathan Wage <jonwage@gmail.com> |
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32 | * @author Roman Borschel <roman@code-factory.org> |
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33 | * @author David Abdemoulaie <dave@hobodave.com> |
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34 | */ |
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35 | class MemcacheCache extends CacheProvider |
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36 | { |
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37 | /** |
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38 | * @var Memcache|null |
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39 | */ |
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40 | private $memcache; |
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41 | |||
42 | /** |
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43 | * Sets the memcache instance to use. |
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44 | * |
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45 | * @param Memcache $memcache |
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46 | * |
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47 | * @return void |
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48 | */ |
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49 | public function setMemcache(Memcache $memcache) |
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50 | { |
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51 | $this->memcache = $memcache; |
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52 | } |
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53 | |||
54 | /** |
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55 | * Gets the memcache instance used by the cache. |
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56 | * |
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57 | * @return Memcache|null |
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58 | */ |
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59 | public function getMemcache() |
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60 | { |
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61 | return $this->memcache; |
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62 | } |
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63 | |||
64 | /** |
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65 | * {@inheritdoc} |
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66 | */ |
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67 | protected function doFetch($id) |
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68 | { |
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69 | return $this->memcache->get($id); |
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70 | } |
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71 | |||
72 | /** |
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73 | * {@inheritdoc} |
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74 | */ |
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75 | protected function doContains($id) |
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76 | { |
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77 | $flags = null; |
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78 | $this->memcache->get($id, $flags); |
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79 | |||
80 | //if memcache has changed the value of "flags", it means the value exists |
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81 | return ($flags !== null); |
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82 | } |
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83 | |||
84 | /** |
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85 | * {@inheritdoc} |
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86 | */ |
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87 | protected function doSave($id, $data, $lifeTime = 0) |
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88 | { |
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89 | if ($lifeTime > 30 * 24 * 3600) { |
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90 | $lifeTime = time() + $lifeTime; |
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91 | } |
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92 | return $this->memcache->set($id, $data, 0, (int) $lifeTime); |
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93 | } |
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94 | |||
95 | /** |
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96 | * {@inheritdoc} |
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97 | */ |
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98 | protected function doDelete($id) |
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99 | { |
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100 | // Memcache::delete() returns false if entry does not exist |
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101 | return $this->memcache->delete($id) || ! $this->doContains($id); |
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102 | } |
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103 | |||
104 | /** |
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105 | * {@inheritdoc} |
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106 | */ |
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107 | protected function doFlush() |
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108 | { |
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109 | return $this->memcache->flush(); |
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110 | } |
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111 | |||
112 | /** |
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113 | * {@inheritdoc} |
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114 | */ |
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115 | protected function doGetStats() |
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116 | { |
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117 | $stats = $this->memcache->getStats(); |
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118 | return array( |
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119 | Cache::STATS_HITS => $stats['get_hits'], |
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120 | Cache::STATS_MISSES => $stats['get_misses'], |
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121 | Cache::STATS_UPTIME => $stats['uptime'], |
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122 | Cache::STATS_MEMORY_USAGE => $stats['bytes'], |
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123 | Cache::STATS_MEMORY_AVAILABLE => $stats['limit_maxbytes'], |
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124 | ); |
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125 | } |
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126 | } |