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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Log\Target\File; |
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/** |
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* FileRotator takes care of rotating files. |
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* |
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* If the size of the file exceeds [[maxFileSize]] (in kilo-bytes), a rotation will be performed, which renames |
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* the current file by suffixing the file name with '.1'. |
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* |
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* All existing files are moved backwards by one place, i.e., '.2' to '.3', '.1' to '.2', and so on. |
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* The property [[maxFiles]] specifies how many history files to keep. |
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*/ |
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class FileRotator implements FileRotatorInterface |
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{ |
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/** |
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* @var int maximum file size, in kilo-bytes. Defaults to 10240, meaning 10MB. |
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*/ |
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private int $maxFileSize; |
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/** |
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* @var int number of files used for rotation. Defaults to 5. |
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*/ |
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private int $maxFiles; |
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/** |
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* @var int|null the permission to be set for newly created files. |
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* This value will be used by PHP chmod() function. No umask will be applied. |
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* If not set, the permission will be determined by the current environment. |
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*/ |
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private ?int $fileMode; |
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/** |
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* @var bool|null Whether to rotate files by copy and truncate in contrast to rotation by |
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* renaming files. Defaults to `true` to be more compatible with log tailers and is windows |
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* systems which do not play well with rename on open files. Rotation by renaming however is |
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* a bit faster. |
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* |
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* The problem with windows systems where the [rename()](http://www.php.net/manual/en/function.rename.php) |
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* function does not work with files that are opened by some process is described in a |
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* [comment by Martin Pelletier](http://www.php.net/manual/en/function.rename.php#102274) in |
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* the PHP documentation. By setting rotateByCopy to `true` you can work |
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* around this problem. |
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*/ |
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private ?bool $rotateByCopy; |
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public function __construct(int $maxFileSize = 10240, int $maxFiles = 5, int $fileMode = null, bool $rotateByCopy = null) |
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{ |
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$this->setMaxFileSize($maxFileSize); |
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$this->setMaxFiles($maxFiles); |
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$this->fileMode = $fileMode; |
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$this->rotateByCopy = $rotateByCopy ?? $this->isRunningOnWindows(); |
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} |
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/** |
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* Sets the value of maxFileSize. |
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* @param int $maxFileSize |
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* @return FileRotator |
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*/ |
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public function setMaxFileSize(int $maxFileSize): self |
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{ |
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$this->maxFileSize = $maxFileSize; |
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if ($this->maxFileSize < 1) { |
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$this->maxFileSize = 1; |
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} |
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return $this; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function getMaxFileSize(): int |
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{ |
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return $this->maxFileSize; |
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} |
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/** |
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* Sets the value of maxFiles. |
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* |
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* @param int $maxFiles |
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* @return FileRotator |
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*/ |
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public function setMaxFiles(int $maxFiles): self |
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{ |
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$this->maxFiles = $maxFiles; |
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if ($this->maxFiles < 1) { |
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$this->maxFiles = 1; |
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} |
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return $this; |
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} |
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/** |
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* Gets the value of maxFiles. |
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* @return int |
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*/ |
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public function getMaxFiles(): int |
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{ |
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return $this->maxFiles; |
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} |
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/** |
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* @inheritDoc |
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*/ |
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public function rotateFile(string $file): void |
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{ |
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for ($i = $this->maxFiles; $i >= 0; --$i) { |
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// $i == 0 is the original file |
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$rotateFile = $file . ($i === 0 ? '' : '.' . $i); |
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if (is_file($rotateFile)) { |
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// suppress errors because it's possible multiple processes enter into this section |
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if ($i === $this->maxFiles) { |
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@unlink($rotateFile); |
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continue; |
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} |
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$newFile = $file . '.' . ($i + 1); |
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if ($this->rotateByCopy) { |
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$this->rotateByCopy($rotateFile, $newFile); |
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} else { |
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$this->rotateByRename($rotateFile, $newFile); |
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} |
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if ($i === 0) { |
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$this->clearFile($rotateFile); |
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} |
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} |
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} |
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} |
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/*** |
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* Clears the file without closing any other process open handles |
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* @param string $rotateFile |
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*/ |
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private function clearFile(string $rotateFile): void |
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{ |
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if ($filePointer = @fopen($rotateFile, 'ab')) { |
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@ftruncate($filePointer, 0); |
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@fclose($filePointer); |
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} |
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} |
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/*** |
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* Copy rotated file into new file |
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* @param string $rotateFile |
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* @param string $newFile |
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*/ |
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private function rotateByCopy(string $rotateFile, string $newFile): void |
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{ |
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@copy($rotateFile, $newFile); |
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if ($this->fileMode !== null) { |
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1 |
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@chmod($newFile, $this->fileMode); |
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} |
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} |
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/** |
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* Renames rotated file into new file |
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* @param string $rotateFile |
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* @param string $newFile |
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*/ |
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private function rotateByRename(string $rotateFile, string $newFile): void |
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{ |
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@rename($rotateFile, $newFile); |
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} |
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private function isRunningOnWindows(): bool |
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{ |
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return DIRECTORY_SEPARATOR === '\\'; |
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} |
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} |
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yiisoft /
log-target-file
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