148 lines
3.7 KiB
PHP
148 lines
3.7 KiB
PHP
<?php
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/*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the MIT license. For more information, see
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* <http://www.doctrine-project.org>.
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*/
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namespace Doctrine\Common\Cache;
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/**
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* Cache provider that allows to easily chain multiple cache providers
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*
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* @author Michaël Gallego <mic.gallego@gmail.com>
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*/
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class ChainCache extends CacheProvider
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{
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/**
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* @var CacheProvider[]
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*/
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private $cacheProviders = array();
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/**
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* Constructor
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*
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* @param CacheProvider[] $cacheProviders
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*/
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public function __construct($cacheProviders = array())
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{
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$this->cacheProviders = $cacheProviders;
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}
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/**
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* {@inheritDoc}
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*/
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public function setNamespace($namespace)
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{
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parent::setNamespace($namespace);
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foreach ($this->cacheProviders as $cacheProvider) {
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$cacheProvider->setNamespace($namespace);
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}
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}
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/**
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* {@inheritDoc}
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*/
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protected function doFetch($id)
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{
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foreach ($this->cacheProviders as $key => $cacheProvider) {
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if ($cacheProvider->doContains($id)) {
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$value = $cacheProvider->doFetch($id);
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// We populate all the previous cache layers (that are assumed to be faster)
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for ($subKey = $key - 1 ; $subKey >= 0 ; $subKey--) {
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$this->cacheProviders[$subKey]->doSave($id, $value);
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}
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return $value;
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}
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}
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return false;
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}
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/**
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* {@inheritDoc}
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*/
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protected function doContains($id)
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{
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foreach ($this->cacheProviders as $cacheProvider) {
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if ($cacheProvider->doContains($id)) {
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return true;
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}
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}
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return false;
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}
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/**
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* {@inheritDoc}
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*/
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protected function doSave($id, $data, $lifeTime = 0)
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{
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$stored = true;
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foreach ($this->cacheProviders as $cacheProvider) {
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$stored = $cacheProvider->doSave($id, $data, $lifeTime) && $stored;
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}
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return $stored;
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}
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/**
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* {@inheritDoc}
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*/
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protected function doDelete($id)
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{
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$deleted = true;
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foreach ($this->cacheProviders as $cacheProvider) {
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$deleted = $cacheProvider->doDelete($id) && $deleted;
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}
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return $deleted;
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}
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/**
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* {@inheritDoc}
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*/
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protected function doFlush()
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{
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$flushed = true;
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foreach ($this->cacheProviders as $cacheProvider) {
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$flushed = $cacheProvider->doFlush() && $flushed;
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}
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return $flushed;
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}
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/**
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* {@inheritDoc}
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*/
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protected function doGetStats()
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{
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// We return all the stats from all adapters
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$stats = array();
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foreach ($this->cacheProviders as $cacheProvider) {
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$stats[] = $cacheProvider->doGetStats();
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}
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return $stats;
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}
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}
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