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<?php |
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namespace PhpCache\Storage; |
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use function strlen; |
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/** |
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* Description of Maintainer. |
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* |
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* @author dude920228 |
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*/ |
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class Maintainer |
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{ |
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private $ttl; |
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private $lastBackupRun; |
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private $backupDir; |
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private $backupTime; |
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private $memoryLimit; |
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public function __construct( |
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int $ttl, |
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string $backupDir, |
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int $backupTime, |
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int $memoryLimit |
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) { |
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$this->ttl = $ttl; |
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$this->lastBackupRun = time(); |
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$this->backupDir = $backupDir; |
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$this->backupTime = $backupTime; |
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$this->memoryLimit = $memoryLimit; |
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} |
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/** |
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* @param Bucket $bucket |
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*/ |
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public function maintainBucket(Bucket $bucket): void |
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{ |
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$entries = $bucket->getEntries(); |
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foreach ($entries as $key => $entry) { |
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$entryElapsedTime = time() - $entry['created_time']; |
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if ($entryElapsedTime >= $this->ttl) { |
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$bucket->delete($key); |
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} |
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} |
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} |
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private function checkMemory(Bucket $bucket): int |
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{ |
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$size = 0; |
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foreach ($bucket->getEntries() as $entry) { |
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$size += strlen($entry['content']); |
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} |
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return $size; |
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} |
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public function backup(Bucket $bucket): void |
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{ |
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$this->createBackupDir(); |
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$this->backupToFile($bucket); |
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} |
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public function checkBackup(int $time, Bucket $bucket): void |
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{ |
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if ($time - $this->lastBackupRun >= $this->backupTime || |
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$this->checkMemory($bucket) >= $this->memoryLimit) { |
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$this->backup($bucket); |
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$this->free($bucket); |
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} |
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} |
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private function free(Bucket $bucket): void |
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{ |
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foreach ($bucket->getEntries() as $key => $entry) { |
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$bucket->delete($key); |
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} |
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} |
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private function createBackupDir(): void |
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{ |
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if (!file_exists($this->backupDir)) { |
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mkdir($this->backupDir); |
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} |
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} |
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private function backupToFile(Bucket $bucket): void |
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{ |
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foreach ($bucket->getEntries() as $key => $entry) { |
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file_put_contents( |
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$this->backupDir.'/'.$key.'.dat', |
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serialize($entry) |
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); |
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} |
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} |
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} |
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dude920228 /
php-cache
