FileSystemSegmentHandler.class.php

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00001 <?php
00002 /***************************************************************************
00003  *   Copyright (C) 2006-2008 by Konstantin V. Arkhipov                     *
00004  *                                                                         *
00005  *   This program is free software; you can redistribute it and/or modify  *
00006  *   it under the terms of the GNU Lesser General Public License as        *
00007  *   published by the Free Software Foundation; either version 3 of the    *
00008  *   License, or (at your option) any later version.                       *
00009  *                                                                         *
00010  ***************************************************************************/
00011 
00015     final class FileSystemSegmentHandler implements SegmentHandler
00016     {
00017         private $path = null;
00018         
00019         public function __construct($segmentId)
00020         {
00021             $path =
00022                 ONPHP_TEMP_PATH
00023                 .'fsdw'.DIRECTORY_SEPARATOR
00024                 .$segmentId
00025                 .DIRECTORY_SEPARATOR;
00026             
00027             try {
00028                 mkdir($path, 0700, true);
00029             } catch (BaseException $e) {
00030                 // already created in race
00031             }
00032             
00033             $this->path = $path;
00034         }
00035         
00036         public function touch($key)
00037         {
00038             try {
00039                 return touch($this->path.$key);
00040             } catch (BaseException $e) {
00041                 return false;
00042             }
00043             
00044             Assert::isUnreachable();
00045         }
00046         
00047         public function unlink($key)
00048         {
00049             try {
00050                 return unlink($this->path.$key);
00051             } catch (BaseException $e) {
00052                 return false;
00053             }
00054             
00055             Assert::isUnreachable();
00056         }
00057         
00058         public function ping($key)
00059         {
00060             return is_readable($this->path.$key);
00061         }
00062         
00063         public function drop()
00064         {
00065             // removed, but not created yet
00066             if (!is_writable($this->path))
00067                 return true;
00068             
00069             $toRemove =
00070                 realpath($this->path)
00071                 .'.'.microtime(true)
00072                 .getmypid().'.'
00073                 .'.removing';
00074             
00075             try {
00076                 rename($this->path, $toRemove);
00077             } catch (BaseException $e) {
00078                 // already removed during race
00079                 return true;
00080             }
00081             
00082             FileUtils::removeDirectory($toRemove, true);
00083             
00084             return true;
00085         }
00086     }
00087 ?>