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| 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 | namespace Wikimedia\Rdbms; |
| 21 | |
| 22 | use RuntimeException; |
| 23 | |
| 24 | /** |
| 25 | * Trivial LoadBalancer that always fails. |
| 26 | * Useful when running code with no config file present, |
| 27 | * e.g. during the installation process. |
| 28 | * |
| 29 | * @since 1.40 |
| 30 | * |
| 31 | * @ingroup Database |
| 32 | */ |
| 33 | class LoadBalancerDisabled extends LoadBalancer { |
| 34 | |
| 35 | public function __construct( $params = [] ) { |
| 36 | parent::__construct( [ |
| 37 | 'servers' => [ [ |
| 38 | 'type' => 'disabled', |
| 39 | 'host' => '(disabled)', |
| 40 | 'dbname' => null, |
| 41 | 'load' => 1, |
| 42 | ] ], |
| 43 | 'trxProfiler' => $params['trxProfiler'] ?? null, |
| 44 | 'srvCache' => $params['srvCache'] ?? null, |
| 45 | 'wanCache' => $params['wanCache'] ?? null, |
| 46 | 'localDomain' => $params['localDomain'] ?? '(disabled)', |
| 47 | 'readOnlyReason' => $params['readOnlyReason'] ?? false, |
| 48 | 'clusterName' => $params['clusterName'] ?? null, |
| 49 | ] ); |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * @param int $i |
| 54 | * @param DatabaseDomain $domain |
| 55 | * @param array $lbInfo |
| 56 | * |
| 57 | * @return never |
| 58 | */ |
| 59 | protected function reallyOpenConnection( $i, DatabaseDomain $domain, array $lbInfo ) { |
| 60 | throw new RuntimeException( 'Database backend disabled' ); |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * @param int $i Specific (overrides $groups) or virtual (DB_PRIMARY/DB_REPLICA) server index |
| 65 | * @param string[]|string $groups Query group(s) in preference order; [] for the default group |
| 66 | * @param string|false $domain DB domain ID or false for the local domain |
| 67 | * @param int $flags Bitfield of CONN_* class constants |
| 68 | * |
| 69 | * @return never |
| 70 | */ |
| 71 | public function getConnection( $i, $groups = [], $domain = false, $flags = 0 ) { |
| 72 | throw new RuntimeException( 'Database backend disabled' ); |
| 73 | } |
| 74 | |
| 75 | /** |
| 76 | * @internal Only to be used by DBConnRef |
| 77 | * @param int $i Specific (overrides $groups) or virtual (DB_PRIMARY/DB_REPLICA) server index |
| 78 | * @param string[]|string $groups Query group(s) in preference order; [] for the default group |
| 79 | * @param string|false $domain DB domain ID or false for the local domain |
| 80 | * @param int $flags Bitfield of CONN_* class constants (e.g. CONN_TRX_AUTOCOMMIT) |
| 81 | * @return never |
| 82 | */ |
| 83 | public function getConnectionInternal( $i, $groups = [], $domain = false, $flags = 0 ): IDatabase { |
| 84 | throw new RuntimeException( 'Database backend disabled' ); |
| 85 | } |
| 86 | |
| 87 | /** |
| 88 | * @param int $i Specific (overrides $groups) or virtual (DB_PRIMARY/DB_REPLICA) server index |
| 89 | * @param string[]|string $groups Query group(s) in preference order; [] for the default group |
| 90 | * @param string|false $domain DB domain ID or false for the local domain |
| 91 | * @param int $flags Bitfield of CONN_* class constants |
| 92 | * |
| 93 | * @return never |
| 94 | */ |
| 95 | public function getConnectionRef( $i, $groups = [], $domain = false, $flags = 0 ): DBConnRef { |
| 96 | throw new RuntimeException( 'Database backend disabled' ); |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * @param int $i Specific (overrides $groups) or virtual (DB_PRIMARY/DB_REPLICA) server index |
| 101 | * @param string[]|string $groups Query group(s) in preference order; [] for the default group |
| 102 | * @param string|false $domain DB domain ID or false for the local domain |
| 103 | * @param int $flags Bitfield of CONN_* class constants |
| 104 | * |
| 105 | * @return never |
| 106 | */ |
| 107 | public function getMaintenanceConnectionRef( $i, $groups = [], $domain = false, $flags = 0 ): DBConnRef { |
| 108 | throw new RuntimeException( 'Database backend disabled' ); |
| 109 | } |
| 110 | |
| 111 | public function reuseConnection( IDatabase $conn ) { |
| 112 | // noop |
| 113 | } |
| 114 | |
| 115 | } |