--- /dev/null
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\Common\Cache;
+
+use MongoBinData;
+use MongoCollection;
+use MongoCursorException;
+use MongoDate;
+
+/**
+ * MongoDB cache provider.
+ *
+ * @since 1.1
+ * @author Jeremy Mikola <jmikola@gmail.com>
+ */
+class MongoDBCache extends CacheProvider
+{
+ /**
+ * The data field will store the serialized PHP value.
+ */
+ const DATA_FIELD = 'd';
+
+ /**
+ * The expiration field will store a MongoDate value indicating when the
+ * cache entry should expire.
+ *
+ * With MongoDB 2.2+, entries can be automatically deleted by MongoDB by
+ * indexing this field with the "expireAfterSeconds" option equal to zero.
+ * This will direct MongoDB to regularly query for and delete any entries
+ * whose date is older than the current time. Entries without a date value
+ * in this field will be ignored.
+ *
+ * The cache provider will also check dates on its own, in case expired
+ * entries are fetched before MongoDB's TTLMonitor pass can expire them.
+ *
+ * @see http://docs.mongodb.org/manual/tutorial/expire-data/
+ */
+ const EXPIRATION_FIELD = 'e';
+
+ /**
+ * @var MongoCollection
+ */
+ private $collection;
+
+ /**
+ * Constructor.
+ *
+ * This provider will default to the write concern and read preference
+ * options set on the MongoCollection instance (or inherited from MongoDB or
+ * MongoClient). Using an unacknowledged write concern (< 1) may make the
+ * return values of delete() and save() unreliable. Reading from secondaries
+ * may make contain() and fetch() unreliable.
+ *
+ * @see http://www.php.net/manual/en/mongo.readpreferences.php
+ * @see http://www.php.net/manual/en/mongo.writeconcerns.php
+ * @param MongoCollection $collection
+ */
+ public function __construct(MongoCollection $collection)
+ {
+ $this->collection = $collection;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function doFetch($id)
+ {
+ $document = $this->collection->findOne(array('_id' => $id), array(self::DATA_FIELD, self::EXPIRATION_FIELD));
+
+ if ($document === null) {
+ return false;
+ }
+
+ if ($this->isExpired($document)) {
+ $this->doDelete($id);
+ return false;
+ }
+
+ return unserialize($document[self::DATA_FIELD]->bin);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function doContains($id)
+ {
+ $document = $this->collection->findOne(array('_id' => $id), array(self::EXPIRATION_FIELD));
+
+ if ($document === null) {
+ return false;
+ }
+
+ if ($this->isExpired($document)) {
+ $this->doDelete($id);
+ return false;
+ }
+
+ return true;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function doSave($id, $data, $lifeTime = 0)
+ {
+ try {
+ $result = $this->collection->update(
+ array('_id' => $id),
+ array('$set' => array(
+ self::EXPIRATION_FIELD => ($lifeTime > 0 ? new MongoDate(time() + $lifeTime) : null),
+ self::DATA_FIELD => new MongoBinData(serialize($data), MongoBinData::BYTE_ARRAY),
+ )),
+ array('upsert' => true, 'multiple' => false)
+ );
+ } catch (MongoCursorException $e) {
+ return false;
+ }
+
+ return isset($result['ok']) ? $result['ok'] == 1 : true;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function doDelete($id)
+ {
+ $result = $this->collection->remove(array('_id' => $id));
+
+ return isset($result['ok']) ? $result['ok'] == 1 : true;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function doFlush()
+ {
+ // Use remove() in lieu of drop() to maintain any collection indexes
+ $result = $this->collection->remove();
+
+ return isset($result['ok']) ? $result['ok'] == 1 : true;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function doGetStats()
+ {
+ $serverStatus = $this->collection->db->command(array(
+ 'serverStatus' => 1,
+ 'locks' => 0,
+ 'metrics' => 0,
+ 'recordStats' => 0,
+ 'repl' => 0,
+ ));
+
+ $collStats = $this->collection->db->command(array('collStats' => 1));
+
+ return array(
+ Cache::STATS_HITS => null,
+ Cache::STATS_MISSES => null,
+ Cache::STATS_UPTIME => (isset($serverStatus['uptime']) ? (int) $serverStatus['uptime'] : null),
+ Cache::STATS_MEMORY_USAGE => (isset($collStats['size']) ? (int) $collStats['size'] : null),
+ Cache::STATS_MEMORY_AVAILABLE => null,
+ );
+ }
+
+ /**
+ * Check if the document is expired.
+ *
+ * @param array $document
+ *
+ * @return bool
+ */
+ private function isExpired(array $document)
+ {
+ return isset($document[self::EXPIRATION_FIELD]) &&
+ $document[self::EXPIRATION_FIELD] instanceof MongoDate &&
+ $document[self::EXPIRATION_FIELD]->sec < time();
+ }
+}
projects / yaffs-website / blobdiff