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annotate PostgreSQL/Plugins/PostgreSQLStorageArea.cpp @ 269:567761f0c1ea

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fix issue #151: support of retries in the storage area plugins to deal with multiple writers
author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 21 Apr 2021 17:54:31 +0200
parents d663d9e44f8d
children 16aac0287485
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2021 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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22 #include "PostgreSQLStorageArea.h"
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23 #include "PostgreSQLDefinitions.h"
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25 #include "../../Framework/PostgreSQL/PostgreSQLTransaction.h"
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26 #include "../../Resources/Orthanc/Plugins/OrthancPluginCppWrapper.h"
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27
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28 #include <Compatibility.h> // For std::unique_ptr<>
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29 #include <Logging.h>
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32 namespace OrthancDatabases
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33 {
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34 void PostgreSQLStorageArea::ConfigureDatabase(PostgreSQLDatabase& db,
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35 const PostgreSQLParameters& parameters,
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36 bool clearAll)
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37 {
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38 if (parameters.HasLock())
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39 {
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40 db.AdvisoryLock(POSTGRESQL_LOCK_STORAGE);
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41 }
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43 {
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44 PostgreSQLDatabase::TransientAdvisoryLock lock(db, POSTGRESQL_LOCK_DATABASE_SETUP);
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46 if (clearAll)
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47 {
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48 db.ClearAll();
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49 }
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51 {
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52 PostgreSQLTransaction t(db, TransactionType_ReadWrite);
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54 if (!db.DoesTableExist("StorageArea"))
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55 {
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56 db.ExecuteMultiLines("CREATE TABLE IF NOT EXISTS StorageArea("
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57 "uuid VARCHAR NOT NULL PRIMARY KEY,"
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58 "content OID NOT NULL,"
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59 "type INTEGER NOT NULL)");
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60
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61 // Automatically remove the large objects associated with the table
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62 db.ExecuteMultiLines("CREATE OR REPLACE RULE StorageAreaDelete AS ON DELETE "
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63 "TO StorageArea DO SELECT lo_unlink(old.content);");
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64 }
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66 t.Commit();
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67 }
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72 PostgreSQLStorageArea::PostgreSQLStorageArea(const PostgreSQLParameters& parameters,
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73 bool clearAll) :
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74 StorageBackend(PostgreSQLDatabase::CreateDatabaseFactory(parameters),
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75 parameters.GetMaxConnectionRetries())
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76 {
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77 {
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78 AccessorBase accessor(*this);
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79 PostgreSQLDatabase& database = dynamic_cast<PostgreSQLDatabase&>(accessor.GetManager().GetDatabase());
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80 ConfigureDatabase(database, parameters, clearAll);
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81 }
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83 }