Mercurial > hg > orthanc-databases
annotate Framework/PostgreSQL/PostgreSQLDatabase.cpp @ 29:2fb9cd42af14
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Mon, 16 Jul 2018 15:20:35 +0200 |
| parents | b2ff1cd2907a |
| children | 6a574d810b98 |
| rev | line source |
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| 0 | 1 /** |
| 2 * Orthanc - A Lightweight, RESTful DICOM Store | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
| 5 * Copyright (C) 2017-2018 Osimis S.A., Belgium | |
| 6 * | |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU Affero General Public License | |
| 9 * as published by the Free Software Foundation, either version 3 of | |
| 10 * the License, or (at your option) any later version. | |
| 11 * | |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 * Affero General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU Affero General Public License | |
| 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 **/ | |
| 20 | |
| 21 | |
| 22 #include "PostgreSQLDatabase.h" | |
| 23 | |
| 24 #include "PostgreSQLResult.h" | |
| 25 #include "PostgreSQLStatement.h" | |
| 26 #include "PostgreSQLTransaction.h" | |
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27 #include "../Common/ImplicitTransaction.h" |
| 0 | 28 |
| 29 #include <Core/Logging.h> | |
| 30 #include <Core/OrthancException.h> | |
| 31 | |
| 32 #include <boost/lexical_cast.hpp> | |
| 33 | |
| 34 // PostgreSQL includes | |
| 35 #include <libpq-fe.h> | |
| 36 #include <c.h> | |
| 37 #include <catalog/pg_type.h> | |
| 38 | |
| 39 | |
| 40 namespace OrthancDatabases | |
| 41 { | |
| 42 void PostgreSQLDatabase::ThrowException(bool log) | |
| 43 { | |
| 44 if (log) | |
| 45 { | |
| 46 LOG(ERROR) << "PostgreSQL error: " | |
| 47 << PQerrorMessage(reinterpret_cast<PGconn*>(pg_)); | |
| 48 } | |
| 49 | |
| 50 if (PQstatus(reinterpret_cast<PGconn*>(pg_)) == CONNECTION_OK) | |
| 51 { | |
| 52 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); | |
| 53 } | |
| 54 else | |
| 55 { | |
| 56 throw Orthanc::OrthancException(Orthanc::ErrorCode_DatabaseUnavailable); | |
| 57 } | |
| 58 } | |
| 59 | |
| 60 | |
| 61 void PostgreSQLDatabase::Close() | |
| 62 { | |
| 63 if (pg_ != NULL) | |
| 64 { | |
| 65 LOG(INFO) << "Closing connection to PostgreSQL"; | |
| 66 PQfinish(reinterpret_cast<PGconn*>(pg_)); | |
| 67 pg_ = NULL; | |
| 68 } | |
| 69 } | |
| 70 | |
| 71 | |
| 72 void PostgreSQLDatabase::Open() | |
| 73 { | |
| 74 if (pg_ != NULL) | |
| 75 { | |
| 76 // Already connected | |
| 77 return; | |
| 78 } | |
| 79 | |
| 80 std::string s; | |
| 81 parameters_.Format(s); | |
| 82 | |
| 83 pg_ = PQconnectdb(s.c_str()); | |
| 84 | |
| 85 if (pg_ == NULL || | |
| 86 PQstatus(reinterpret_cast<PGconn*>(pg_)) != CONNECTION_OK) | |
| 87 { | |
| 88 std::string message; | |
| 89 | |
| 90 if (pg_) | |
| 91 { | |
| 92 message = PQerrorMessage(reinterpret_cast<PGconn*>(pg_)); | |
| 93 PQfinish(reinterpret_cast<PGconn*>(pg_)); | |
| 94 pg_ = NULL; | |
| 95 } | |
| 96 | |
| 97 LOG(ERROR) << "PostgreSQL error: " << message; | |
| 98 throw Orthanc::OrthancException(Orthanc::ErrorCode_DatabaseUnavailable); | |
| 99 } | |
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100 } |
| 0 | 101 |
| 102 | |
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103 void PostgreSQLDatabase::AdvisoryLock(int32_t lock) |
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104 { |
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105 PostgreSQLTransaction transaction(*this); |
| 0 | 106 |
| 29 | 107 Query query("select pg_try_advisory_lock(" + |
| 108 boost::lexical_cast<std::string>(lock) + ");", false); | |
| 109 PostgreSQLStatement s(*this, query); | |
| 0 | 110 |
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111 PostgreSQLResult result(s); |
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112 if (result.IsDone() || |
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113 !result.GetBoolean(0)) |
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114 { |
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115 LOG(ERROR) << "The PostgreSQL database is locked by another instance of Orthanc"; |
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116 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); |
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117 } |
| 0 | 118 |
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119 transaction.Commit(); |
| 0 | 120 } |
| 121 | |
| 122 | |
| 123 void PostgreSQLDatabase::Execute(const std::string& sql) | |
| 124 { | |
| 125 LOG(TRACE) << "PostgreSQL: " << sql; | |
| 126 Open(); | |
| 127 | |
| 128 PGresult* result = PQexec(reinterpret_cast<PGconn*>(pg_), sql.c_str()); | |
| 129 if (result == NULL) | |
| 130 { | |
| 131 ThrowException(true); | |
| 132 } | |
| 133 | |
| 134 bool ok = (PQresultStatus(result) == PGRES_COMMAND_OK || | |
| 135 PQresultStatus(result) == PGRES_TUPLES_OK); | |
| 136 | |
| 137 if (ok) | |
| 138 { | |
| 139 PQclear(result); | |
| 140 } | |
| 141 else | |
| 142 { | |
| 143 std::string message = PQresultErrorMessage(result); | |
| 144 PQclear(result); | |
| 145 | |
| 146 LOG(ERROR) << "PostgreSQL error: " << message; | |
| 147 ThrowException(false); | |
| 148 } | |
| 149 } | |
| 150 | |
| 151 | |
| 152 bool PostgreSQLDatabase::DoesTableExist(const char* name) | |
| 153 { | |
| 154 std::string lower(name); | |
| 155 std::transform(lower.begin(), lower.end(), lower.begin(), tolower); | |
| 156 | |
| 157 // http://stackoverflow.com/a/24089729/881731 | |
| 158 | |
| 159 PostgreSQLStatement statement(*this, | |
| 160 "SELECT 1 FROM pg_catalog.pg_class c " | |
| 161 "JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace " | |
| 162 "WHERE n.nspname = 'public' AND c.relkind='r' " | |
| 163 "AND c.relname=$1", true); | |
| 164 | |
| 165 statement.DeclareInputString(0); | |
| 166 statement.BindString(0, lower); | |
| 167 | |
| 168 PostgreSQLResult result(statement); | |
| 169 return !result.IsDone(); | |
| 170 } | |
| 171 | |
| 172 | |
| 173 void PostgreSQLDatabase::ClearAll() | |
| 174 { | |
| 175 PostgreSQLTransaction transaction(*this); | |
| 176 | |
| 177 // Remove all the large objects | |
| 178 Execute("SELECT lo_unlink(loid) FROM (SELECT DISTINCT loid FROM pg_catalog.pg_largeobject) as loids;"); | |
| 179 | |
| 180 // http://stackoverflow.com/a/21247009/881731 | |
| 181 Execute("DROP SCHEMA public CASCADE;"); | |
| 182 Execute("CREATE SCHEMA public;"); | |
| 183 Execute("GRANT ALL ON SCHEMA public TO postgres;"); | |
| 184 Execute("GRANT ALL ON SCHEMA public TO public;"); | |
| 185 Execute("COMMENT ON SCHEMA public IS 'standard public schema';"); | |
| 186 | |
| 187 transaction.Commit(); | |
| 188 } | |
| 189 | |
| 190 | |
| 191 IPrecompiledStatement* PostgreSQLDatabase::Compile(const Query& query) | |
| 192 { | |
| 193 return new PostgreSQLStatement(*this, query); | |
| 194 } | |
| 195 | |
| 196 | |
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197 namespace |
| 0 | 198 { |
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199 class PostgreSQLImplicitTransaction : public ImplicitTransaction |
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200 { |
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201 private: |
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202 PostgreSQLDatabase& db_; |
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203 |
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204 protected: |
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205 virtual IResult* ExecuteInternal(IPrecompiledStatement& statement, |
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206 const Dictionary& parameters) |
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207 { |
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208 return dynamic_cast<PostgreSQLStatement&>(statement).Execute(*this, parameters); |
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209 } |
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210 |
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211 virtual void ExecuteWithoutResultInternal(IPrecompiledStatement& statement, |
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212 const Dictionary& parameters) |
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213 { |
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214 dynamic_cast<PostgreSQLStatement&>(statement).ExecuteWithoutResult(*this, parameters); |
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215 } |
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216 |
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217 public: |
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218 PostgreSQLImplicitTransaction(PostgreSQLDatabase& db) : |
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219 db_(db) |
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220 { |
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221 } |
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222 }; |
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223 } |
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224 |
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225 |
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226 ITransaction* PostgreSQLDatabase::CreateTransaction(bool isImplicit) |
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227 { |
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228 if (isImplicit) |
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229 { |
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230 return new PostgreSQLImplicitTransaction(*this); |
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231 } |
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232 else |
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233 { |
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234 return new PostgreSQLTransaction(*this); |
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235 } |
| 0 | 236 } |
| 237 } |