/**
* Writes item into the cache.
* @param string key
* @param mixed data
* @param array dependencies
* @return void
*/
public function write($key, $data, array $dp)
{
if (isset($dp[NCache::ITEMS])) {
throw new NotSupportedException('Dependent items are not supported by MemcachedStorage.');
}
$key = $this->prefix . $key;
$meta = array(
self::META_DATA => $data,
);
$expire = 0;
if (isset($dp[NCache::EXPIRATION])) {
$expire = (int) $dp[NCache::EXPIRATION];
if (!empty($dp[NCache::SLIDING])) {
$meta[self::META_DELTA] = $expire; // sliding time
}
}
if (isset($dp[NCache::CALLBACKS])) {
$meta[self::META_CALLBACKS] = $dp[NCache::CALLBACKS];
}
if (isset($dp[NCache::TAGS]) || isset($dp[NCache::PRIORITY])) {
if (!$this->journal) {
throw new InvalidStateException('CacheJournal has not been provided.');
}
$this->journal->write($key, $dp);
}
$this->memcache->set($key, $meta, 0, $expire);
}
/**
* Writes item into the cache.
* @param string key
* @param mixed data
* @param array dependencies
* @return void
*/
public function write($key, $data, array $dp)
{
$meta = array(
self::META_TIME => microtime(),
);
if (isset($dp[NCache::EXPIRATION])) {
if (empty($dp[NCache::SLIDING])) {
$meta[self::META_EXPIRE] = $dp[NCache::EXPIRATION] + time(); // absolute time
} else {
$meta[self::META_DELTA] = (int) $dp[NCache::EXPIRATION]; // sliding time
}
}
if (isset($dp[NCache::ITEMS])) {
foreach ((array) $dp[NCache::ITEMS] as $item) {
$depFile = $this->getCacheFile($item);
$m = $this->readMetaAndLock($depFile, LOCK_SH);
$meta[self::META_ITEMS][$depFile] = $m[self::META_TIME]; // may be NULL
unset($m);
}
}
if (isset($dp[NCache::CALLBACKS])) {
$meta[self::META_CALLBACKS] = $dp[NCache::CALLBACKS];
}
if (!isset($this->locks[$key])) {
$this->lock($key);
if (!isset($this->locks[$key])) {
return;
}
}
$handle = $this->locks[$key];
unset($this->locks[$key]);
$cacheFile = $this->getCacheFile($key);
if (isset($dp[NCache::TAGS]) || isset($dp[NCache::PRIORITY])) {
if (!$this->journal) {
throw new InvalidStateException('CacheJournal has not been provided.');
}
$this->journal->write($cacheFile, $dp);
}
ftruncate($handle, 0);
if (!is_string($data)) {
$data = serialize($data);
$meta[self::META_SERIALIZED] = TRUE;
}
$head = serialize($meta) . '?>';
$head = '<?php //netteCache[01]' . str_pad((string) strlen($head), 6, '0', STR_PAD_LEFT) . $head;
$headLen = strlen($head);
$dataLen = strlen($data);
do {
if (fwrite($handle, str_repeat("\x00", $headLen), $headLen) !== $headLen) {
break;
}
if (fwrite($handle, $data, $dataLen) !== $dataLen) {
break;
}
fseek($handle, 0);
if (fwrite($handle, $head, $headLen) !== $headLen) {
break;
}
flock($handle, LOCK_UN);
fclose($handle);
return;
} while (FALSE);
$this->delete($cacheFile, $handle);
}