Mercurial > hg > orthanc-databases
annotate Framework/PostgreSQL/PostgreSQLDatabase.cpp @ 46:6a574d810b98
Compatibility with MySQL 8.0
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Wed, 18 Jul 2018 12:27:40 +0200 |
| parents | 2fb9cd42af14 |
| children | 318c1ccb787c |
| rev | line source |
|---|---|
| 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 | |
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71 |
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72 PostgreSQLDatabase::~PostgreSQLDatabase() |
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73 { |
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74 try |
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75 { |
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76 Close(); |
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77 } |
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78 catch (Orthanc::OrthancException&) |
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79 { |
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80 // Ignore possible exceptions due to connection loss |
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81 } |
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82 } |
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83 |
| 0 | 84 |
| 85 void PostgreSQLDatabase::Open() | |
| 86 { | |
| 87 if (pg_ != NULL) | |
| 88 { | |
| 89 // Already connected | |
| 90 return; | |
| 91 } | |
| 92 | |
| 93 std::string s; | |
| 94 parameters_.Format(s); | |
| 95 | |
| 96 pg_ = PQconnectdb(s.c_str()); | |
| 97 | |
| 98 if (pg_ == NULL || | |
| 99 PQstatus(reinterpret_cast<PGconn*>(pg_)) != CONNECTION_OK) | |
| 100 { | |
| 101 std::string message; | |
| 102 | |
| 103 if (pg_) | |
| 104 { | |
| 105 message = PQerrorMessage(reinterpret_cast<PGconn*>(pg_)); | |
| 106 PQfinish(reinterpret_cast<PGconn*>(pg_)); | |
| 107 pg_ = NULL; | |
| 108 } | |
| 109 | |
| 110 LOG(ERROR) << "PostgreSQL error: " << message; | |
| 111 throw Orthanc::OrthancException(Orthanc::ErrorCode_DatabaseUnavailable); | |
| 112 } | |
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113 } |
| 0 | 114 |
| 115 | |
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116 void PostgreSQLDatabase::AdvisoryLock(int32_t lock) |
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117 { |
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118 PostgreSQLTransaction transaction(*this); |
| 0 | 119 |
| 29 | 120 Query query("select pg_try_advisory_lock(" + |
| 121 boost::lexical_cast<std::string>(lock) + ");", false); | |
| 122 PostgreSQLStatement s(*this, query); | |
| 0 | 123 |
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124 PostgreSQLResult result(s); |
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125 if (result.IsDone() || |
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126 !result.GetBoolean(0)) |
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127 { |
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128 LOG(ERROR) << "The PostgreSQL database is locked by another instance of Orthanc"; |
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129 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); |
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130 } |
| 0 | 131 |
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132 transaction.Commit(); |
| 0 | 133 } |
| 134 | |
| 135 | |
| 136 void PostgreSQLDatabase::Execute(const std::string& sql) | |
| 137 { | |
| 138 LOG(TRACE) << "PostgreSQL: " << sql; | |
| 139 Open(); | |
| 140 | |
| 141 PGresult* result = PQexec(reinterpret_cast<PGconn*>(pg_), sql.c_str()); | |
| 142 if (result == NULL) | |
| 143 { | |
| 144 ThrowException(true); | |
| 145 } | |
| 146 | |
| 147 bool ok = (PQresultStatus(result) == PGRES_COMMAND_OK || | |
| 148 PQresultStatus(result) == PGRES_TUPLES_OK); | |
| 149 | |
| 150 if (ok) | |
| 151 { | |
| 152 PQclear(result); | |
| 153 } | |
| 154 else | |
| 155 { | |
| 156 std::string message = PQresultErrorMessage(result); | |
| 157 PQclear(result); | |
| 158 | |
| 159 LOG(ERROR) << "PostgreSQL error: " << message; | |
| 160 ThrowException(false); | |
| 161 } | |
| 162 } | |
| 163 | |
| 164 | |
| 165 bool PostgreSQLDatabase::DoesTableExist(const char* name) | |
| 166 { | |
| 167 std::string lower(name); | |
| 168 std::transform(lower.begin(), lower.end(), lower.begin(), tolower); | |
| 169 | |
| 170 // http://stackoverflow.com/a/24089729/881731 | |
| 171 | |
| 172 PostgreSQLStatement statement(*this, | |
| 173 "SELECT 1 FROM pg_catalog.pg_class c " | |
| 174 "JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace " | |
| 175 "WHERE n.nspname = 'public' AND c.relkind='r' " | |
| 176 "AND c.relname=$1", true); | |
| 177 | |
| 178 statement.DeclareInputString(0); | |
| 179 statement.BindString(0, lower); | |
| 180 | |
| 181 PostgreSQLResult result(statement); | |
| 182 return !result.IsDone(); | |
| 183 } | |
| 184 | |
| 185 | |
| 186 void PostgreSQLDatabase::ClearAll() | |
| 187 { | |
| 188 PostgreSQLTransaction transaction(*this); | |
| 189 | |
| 190 // Remove all the large objects | |
| 191 Execute("SELECT lo_unlink(loid) FROM (SELECT DISTINCT loid FROM pg_catalog.pg_largeobject) as loids;"); | |
| 192 | |
| 193 // http://stackoverflow.com/a/21247009/881731 | |
| 194 Execute("DROP SCHEMA public CASCADE;"); | |
| 195 Execute("CREATE SCHEMA public;"); | |
| 196 Execute("GRANT ALL ON SCHEMA public TO postgres;"); | |
| 197 Execute("GRANT ALL ON SCHEMA public TO public;"); | |
| 198 Execute("COMMENT ON SCHEMA public IS 'standard public schema';"); | |
| 199 | |
| 200 transaction.Commit(); | |
| 201 } | |
| 202 | |
| 203 | |
| 204 IPrecompiledStatement* PostgreSQLDatabase::Compile(const Query& query) | |
| 205 { | |
| 206 return new PostgreSQLStatement(*this, query); | |
| 207 } | |
| 208 | |
| 209 | |
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210 namespace |
| 0 | 211 { |
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212 class PostgreSQLImplicitTransaction : public ImplicitTransaction |
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213 { |
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214 private: |
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215 PostgreSQLDatabase& db_; |
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216 |
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217 protected: |
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218 virtual IResult* ExecuteInternal(IPrecompiledStatement& statement, |
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219 const Dictionary& parameters) |
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220 { |
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221 return dynamic_cast<PostgreSQLStatement&>(statement).Execute(*this, parameters); |
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222 } |
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223 |
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224 virtual void ExecuteWithoutResultInternal(IPrecompiledStatement& statement, |
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225 const Dictionary& parameters) |
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226 { |
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227 dynamic_cast<PostgreSQLStatement&>(statement).ExecuteWithoutResult(*this, parameters); |
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228 } |
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229 |
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230 public: |
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231 PostgreSQLImplicitTransaction(PostgreSQLDatabase& db) : |
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232 db_(db) |
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233 { |
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234 } |
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235 }; |
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236 } |
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237 |
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238 |
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239 ITransaction* PostgreSQLDatabase::CreateTransaction(bool isImplicit) |
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240 { |
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241 if (isImplicit) |
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242 { |
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243 return new PostgreSQLImplicitTransaction(*this); |
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244 } |
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245 else |
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246 { |
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247 return new PostgreSQLTransaction(*this); |
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248 } |
| 0 | 249 } |
| 250 } |