[Sommaire] [Imprimer]

   1  <?php
   2  //
   3  // Definition of eZClusterFileHandler class
   4  //
   5  // Created on: <07-Mar-2006 16:14:02 vs>
   6  //
   7  // SOFTWARE NAME: eZ publish
   8  // SOFTWARE RELEASE: 3.9.0
   9  // BUILD VERSION: 17785
  10  // COPYRIGHT NOTICE: Copyright (C) 1999-2006 eZ systems AS
  11  // SOFTWARE LICENSE: GNU General Public License v2.0
  12  // NOTICE: >
  13  //   This program is free software; you can redistribute it and/or
  14  //   modify it under the terms of version 2.0  of the GNU General
  15  //   Public License as published by the Free Software Foundation.
  16  //
  17  //   This program is distributed in the hope that it will be useful,
  18  //   but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  //   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  //   GNU General Public License for more details.
  21  //
  22  //   You should have received a copy of version 2.0 of the GNU General
  23  //   Public License along with this program; if not, write to the Free
  24  //   Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  25  //   MA 02110-1301, USA.
  26  //
  27  //
  28  
  29  /*! \file ezclusterfilehandler.php
  30  */
  31  
  32  class eZClusterFileHandler
  33  {
  34      /**
  35       * \public
  36       * \static
  37       * \return filehandler
  38       */
  39      function instance( $filename = false )
  40      {
  41          // Determine handler to use and cache its name in a global variable.
  42          if ( !isset( $GLOBALS['eZClusterFileHandler_chosen_handler_class'] ) )
  43          {
  44              require_once ( 'lib/ezutils/classes/ezini.php' );
  45              $fileINI = eZINI::instance( 'file.ini' );
  46              $handlerName = 'ezfs';
  47              if ( $fileINI->hasVariable( 'ClusteringSettings', 'FileHandler' ) )
  48                  $handlerName = $fileINI->variable( 'ClusteringSettings', 'FileHandler' );
  49  
  50              // Create list of directories used to search cluster file handlers for.
  51              $searchPathArray = eZClusterFileHandler::searchPathArray();
  52  
  53              // Find chosen handler.
  54              $handlerClass = $handlerName . 'filehandler';
  55              foreach ( $searchPathArray as $searchPath )
  56              {
  57                  $includeFileName = $searchPath . '/' . $handlerClass . '.php';
  58                  if ( is_readable( $includeFileName ) )
  59                  {
  60                      include_once( $includeFileName );
  61                      $GLOBALS['eZClusterFileHandler_chosen_handler_class'] = $handlerClass;
  62                      break;
  63                  }
  64              }
  65  
  66              if ( !isset( $GLOBALS['eZClusterFileHandler_chosen_handler_class'] ) )
  67              {
  68                  eZDebug::writeError( "Cannot find cluster file handler '$handlerName'." );
  69                  return null;
  70              }
  71          }
  72  
  73          // Instantiate the handler.
  74          if ( $filename !== false )
  75          {
  76              // return new FileHandler based on INI setting.
  77              $handlerClass = $GLOBALS['eZClusterFileHandler_chosen_handler_class'];
  78              return new $handlerClass( $filename );
  79          }
  80          else
  81          {
  82              // return Filehandler from GLOBALS based on ini setting.
  83              if ( !isset( $GLOBALS['eZClusterFileHandler_chosen_handler'] ) )
  84              {
  85                  $handlerClass = $GLOBALS['eZClusterFileHandler_chosen_handler_class'];
  86                  $handler = new $handlerClass;
  87                  $GLOBALS['eZClusterFileHandler_chosen_handler'] = $handler;
  88              }
  89              else
  90                  $handler = $GLOBALS['eZClusterFileHandler_chosen_handler'];
  91  
  92              return $handler;
  93          }
  94      }
  95  
  96      /**
  97       * \public
  98       * \static
  99       * \return list of directories used to search cluster file handlers for.
 100       */
 101      function searchPathArray()
 102      {
 103          if ( !isset( $GLOBALS['eZClusterFileHandler_search_path_array'] ) )
 104          {
 105              $fileINI = eZINI::instance( 'file.ini' );
 106              $searchPathArray = array( 'kernel/classes/clusterfilehandlers' );
 107              if ( $fileINI->hasVariable( 'ClusteringSettings', 'ExtensionDirectories' ) )
 108              {
 109                  $extensionDirectories = $fileINI->variable( 'ClusteringSettings', 'ExtensionDirectories' );
 110                  require_once ( 'lib/ezutils/classes/ezextension.php' );
 111                  $baseDirectory = eZExtension::baseDirectory();
 112                  foreach ( $extensionDirectories as $extensionDirectory )
 113                  {
 114                      $customSearchPath = $baseDirectory . '/' . $extensionDirectory . '/clusterfilehandlers';
 115                      if ( file_exists( $customSearchPath ) )
 116                          $searchPathArray[] = $customSearchPath;
 117                  }
 118              }
 119  
 120              $GLOBALS['eZClusterFileHandler_search_path_array'] = $searchPathArray;
 121          }
 122  
 123          return $GLOBALS['eZClusterFileHandler_search_path_array'];
 124      }
 125  }
 126  
 127  ?>