Mercurial > hg > orthanc-databases
diff MySQL/Plugins/MySQLDefinitions.h @ 137:52b3859ee0b7
MySQL: acquiring named locks instead of numbers
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 09 May 2019 11:29:17 +0200 |
parents | |
children | 4cd7e45b671e |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MySQL/Plugins/MySQLDefinitions.h Thu May 09 11:29:17 2019 +0200 @@ -0,0 +1,49 @@ +/** + * Orthanc - A Lightweight, RESTful DICOM Store + * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics + * Department, University Hospital of Liege, Belgium + * Copyright (C) 2017-2019 Osimis S.A., Belgium + * + * This program is free software: you can redistribute it and/or + * modify it under the terms of the GNU Affero General Public License + * as published by the Free Software Foundation, either version 3 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + **/ + + +#pragma once + +#include <stdint.h> + + +/** + * This advisory lock is used if the "Lock" option is set to "true", + * in order to prevent the execution of two PostgreSQL index plugins + * on the same database. + **/ +static const char* const MYSQL_LOCK_INDEX = "orthanc_index_lock"; + + +/** + * This advisory lock is used if the "Lock" option is set to "true", + * in order to prevent the execution of two PostgreSQL storage area + * plugins on the same database. + **/ +static const char* const MYSQL_LOCK_STORAGE = "orthanc_storage_lock"; + + +/** + * Transient advisory lock to protect the setup of the database, + * because concurrent statements like "CREATE TABLE" are not protected + * by transactions. + * https://groups.google.com/d/msg/orthanc-users/yV3LSTh_TjI/h3PRApJFBAAJ + **/ +static const char* const MYSQL_LOCK_DATABASE_SETUP = "orthanc_setup_lock";