includes/libs/eventrelayer/EventRelayerGroup.php

   1 <?php
   2 /**
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16  * http://www.gnu.org/copyleft/gpl.html
  17  *
  18  * @file
  19  */
  20
  21 namespace Wikimedia\EventRelayer;
  22
  23 use UnexpectedValueException;
  24
  25 /**
  26  * Factory class for spawning EventRelayer objects using configuration
  27  *
  28  * @since 1.27
  29  */
  30 class EventRelayerGroup {
  31         /** @var array[] */
  32         protected $configByChannel = [];
  33
  34         /** @var EventRelayer[] */
  35         protected $relayers = [];
  36
  37         /**
  38          * @param array[] $config Channel configuration
  39          */
  40         public function __construct( array $config ) {
  41                 $this->configByChannel = $config;
  42         }
  43
  44         /**
  45          * @param string $channel
  46          * @return EventRelayer Relayer instance that handles the given channel
  47          */
  48         public function getRelayer( $channel ) {
  49                 $channelKey = isset( $this->configByChannel[$channel] )
  50                         ? $channel
  51                         : 'default';
  52
  53                 if ( !isset( $this->relayers[$channelKey] ) ) {
  54                         if ( !isset( $this->configByChannel[$channelKey] ) ) {
  55                                 throw new UnexpectedValueException( "No config for '$channelKey'" );
  56                         }
  57
  58                         $config = $this->configByChannel[$channelKey];
  59                         $class = $config['class'];
  60
  61                         $this->relayers[$channelKey] = new $class( $config );
  62                 }
  63
  64                 return $this->relayers[$channelKey];
  65         }
  66 }
  67
  68 /** @deprecated class alias since 1.41 */
  69 class_alias( EventRelayerGroup::class, 'EventRelayerGroup' );