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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; under version 2 |
| 7 | * of the License (non-upgradable). |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 17 | * |
| 18 | * Copyright (c) 2015 (original work) Open Assessment Technologies SA; |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | namespace oat\tao\model\lock; |
| 23 | |
| 24 | use core_kernel_classes_Resource; |
| 25 | |
| 26 | /** |
| 27 | * manage lock on a given resource |
| 28 | * |
| 29 | * @author plichart |
| 30 | */ |
| 31 | interface LockSystem |
| 32 | { |
| 33 | public const SERVICE_ID = 'tao/lock'; |
| 34 | |
| 35 | /** |
| 36 | * set a lock on @resource with owner @user, succeeds also if there is a lock already exists but with the same owner |
| 37 | * |
| 38 | * @throws ResourceLockedException if the resource already has a lock with a different owner |
| 39 | * @param core_kernel_classes_Resource $resource |
| 40 | * @param core_kernel_classes_Resource $user |
| 41 | */ |
| 42 | public function setLock(core_kernel_classes_Resource $resource, $ownerId); |
| 43 | |
| 44 | /** |
| 45 | * return true is the resource is locked, else otherwise |
| 46 | * @return boolean |
| 47 | */ |
| 48 | public function isLocked(core_kernel_classes_Resource $resource); |
| 49 | |
| 50 | /** |
| 51 | * release the lock if owned by @user |
| 52 | * @param core_kernel_classes_Resource $resource |
| 53 | * @param core_kernel_classes_Resource $user |
| 54 | * @throw common_Exception no lock to release |
| 55 | */ |
| 56 | public function releaseLock(core_kernel_classes_Resource $resource, $ownerId); |
| 57 | |
| 58 | /** |
| 59 | * release the lock |
| 60 | * @param core_kernel_classes_Resource $resource |
| 61 | * @throw common_Exception no lock to release |
| 62 | */ |
| 63 | public function forceReleaseLock(core_kernel_classes_Resource $resource); |
| 64 | |
| 65 | /** |
| 66 | * Return lock details or null if no lock found |
| 67 | * |
| 68 | * @param core_kernel_classes_Resource $resource |
| 69 | * @return Lock |
| 70 | */ |
| 71 | public function getLockData(core_kernel_classes_Resource $resource); |
| 72 | } |