Mercurial > hg > orthanc
annotate Core/SQLite/Connection.cpp @ 1079:7761be8eb327 Orthanc-0.8.1
Orthanc-0.8.1
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 29 Jul 2014 12:34:58 +0200 |
| parents | a811bdf8b8eb |
| children | 9b9026560a5f |
| rev | line source |
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| 0 | 1 /** |
| 59 | 2 * Orthanc - A Lightweight, RESTful DICOM Store |
| 689 | 3 * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege, |
| 0 | 4 * Belgium |
| 5 * | |
| 17 | 6 * Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 7 * | |
| 8 * Redistribution and use in source and binary forms, with or without | |
| 9 * modification, are permitted provided that the following conditions are | |
| 10 * met: | |
| 0 | 11 * |
| 17 | 12 * * Redistributions of source code must retain the above copyright |
| 13 * notice, this list of conditions and the following disclaimer. | |
| 14 * * Redistributions in binary form must reproduce the above | |
| 15 * copyright notice, this list of conditions and the following disclaimer | |
| 16 * in the documentation and/or other materials provided with the | |
| 17 * distribution. | |
| 18 * * Neither the name of Google Inc., the name of the CHU of Liege, | |
| 19 * nor the names of its contributors may be used to endorse or promote | |
| 20 * products derived from this software without specific prior written | |
| 21 * permission. | |
| 22 * | |
| 23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 27 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 29 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 33 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 0 | 34 **/ |
| 35 | |
| 36 | |
|
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37 #include "../PrecompiledHeaders.h" |
| 0 | 38 #include "Connection.h" |
| 39 | |
| 40 #include <memory> | |
| 41 #include <cassert> | |
| 42 #include <sqlite3.h> | |
| 43 #include <string.h> | |
| 44 | |
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45 #include <glog/logging.h> |
| 0 | 46 |
| 47 | |
| 59 | 48 namespace Orthanc |
| 0 | 49 { |
| 50 namespace SQLite | |
| 51 { | |
| 52 Connection::Connection() : | |
| 53 db_(NULL), | |
| 54 transactionNesting_(0), | |
| 55 needsRollback_(false) | |
| 56 { | |
| 57 } | |
| 58 | |
| 59 | |
| 60 Connection::~Connection() | |
| 61 { | |
| 62 Close(); | |
| 63 } | |
| 64 | |
| 65 | |
| 66 void Connection::CheckIsOpen() const | |
| 67 { | |
| 68 if (!db_) | |
| 69 { | |
| 59 | 70 throw OrthancException("SQLite: The database is not opened"); |
| 0 | 71 } |
| 72 } | |
| 73 | |
| 74 void Connection::Open(const std::string& path) | |
| 75 { | |
| 76 if (db_) | |
| 77 { | |
| 59 | 78 throw OrthancException("SQLite: Connection is already open"); |
| 0 | 79 } |
| 80 | |
| 81 int err = sqlite3_open(path.c_str(), &db_); | |
| 82 if (err != SQLITE_OK) | |
| 83 { | |
| 84 Close(); | |
| 85 db_ = NULL; | |
| 59 | 86 throw OrthancException("SQLite: Unable to open the database"); |
| 0 | 87 } |
| 88 | |
| 89 // Execute PRAGMAs at this point | |
| 90 // http://www.sqlite.org/pragma.html | |
| 91 Execute("PRAGMA FOREIGN_KEYS=ON;"); | |
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92 Execute("PRAGMA RECURSIVE_TRIGGERS=ON;"); |
| 0 | 93 } |
| 94 | |
| 95 void Connection::OpenInMemory() | |
| 96 { | |
| 97 Open(":memory:"); | |
| 98 } | |
| 99 | |
| 100 void Connection::Close() | |
| 101 { | |
| 102 ClearCache(); | |
| 103 | |
| 104 if (db_) | |
| 105 { | |
| 106 sqlite3_close(db_); | |
| 107 db_ = NULL; | |
| 108 } | |
| 109 } | |
| 110 | |
| 111 void Connection::ClearCache() | |
| 112 { | |
| 113 for (CachedStatements::iterator | |
| 114 it = cachedStatements_.begin(); | |
| 656 | 115 it != cachedStatements_.end(); ++it) |
| 0 | 116 { |
| 117 delete it->second; | |
| 118 } | |
| 119 | |
| 120 cachedStatements_.clear(); | |
| 121 } | |
| 122 | |
| 123 | |
| 124 StatementReference& Connection::GetCachedStatement(const StatementId& id, | |
| 125 const char* sql) | |
| 126 { | |
| 127 CachedStatements::iterator i = cachedStatements_.find(id); | |
| 128 if (i != cachedStatements_.end()) | |
| 129 { | |
| 130 if (i->second->GetReferenceCount() >= 1) | |
| 131 { | |
| 59 | 132 throw OrthancException("SQLite: This cached statement is already being referred to"); |
| 0 | 133 } |
| 134 | |
| 135 return *i->second; | |
| 136 } | |
| 137 else | |
| 138 { | |
| 139 StatementReference* statement = new StatementReference(db_, sql); | |
| 140 cachedStatements_[id] = statement; | |
| 141 return *statement; | |
| 142 } | |
| 143 } | |
| 144 | |
| 145 | |
| 146 bool Connection::Execute(const char* sql) | |
| 147 { | |
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148 VLOG(1) << "SQLite::Connection::Execute " << sql; |
| 0 | 149 CheckIsOpen(); |
| 150 | |
| 151 int error = sqlite3_exec(db_, sql, NULL, NULL, NULL); | |
| 152 if (error == SQLITE_ERROR) | |
| 153 { | |
| 59 | 154 throw OrthancException("SQLite Execute error: " + std::string(sqlite3_errmsg(db_))); |
| 0 | 155 } |
| 156 else | |
| 157 { | |
| 158 return error == SQLITE_OK; | |
| 159 } | |
| 160 } | |
| 161 | |
| 162 int Connection::ExecuteAndReturnErrorCode(const char* sql) | |
| 163 { | |
| 164 CheckIsOpen(); | |
| 165 return sqlite3_exec(db_, sql, NULL, NULL, NULL); | |
| 166 } | |
| 167 | |
| 168 // Info querying ------------------------------------------------------------- | |
| 169 | |
| 170 bool Connection::IsSQLValid(const char* sql) | |
| 171 { | |
| 172 sqlite3_stmt* stmt = NULL; | |
| 173 if (sqlite3_prepare_v2(db_, sql, -1, &stmt, NULL) != SQLITE_OK) | |
| 174 return false; | |
| 175 | |
| 176 sqlite3_finalize(stmt); | |
| 177 return true; | |
| 178 } | |
| 179 | |
| 180 bool Connection::DoesTableOrIndexExist(const char* name, | |
| 181 const char* type) const | |
| 182 { | |
| 183 // Our SQL is non-mutating, so this cast is OK. | |
| 184 Statement statement(const_cast<Connection&>(*this), | |
| 185 "SELECT name FROM sqlite_master WHERE type=? AND name=?"); | |
| 186 statement.BindString(0, type); | |
| 187 statement.BindString(1, name); | |
| 188 return statement.Step(); // Table exists if any row was returned. | |
| 189 } | |
| 190 | |
| 191 bool Connection::DoesTableExist(const char* table_name) const | |
| 192 { | |
| 193 return DoesTableOrIndexExist(table_name, "table"); | |
| 194 } | |
| 195 | |
| 196 bool Connection::DoesIndexExist(const char* index_name) const | |
| 197 { | |
| 198 return DoesTableOrIndexExist(index_name, "index"); | |
| 199 } | |
| 200 | |
| 201 bool Connection::DoesColumnExist(const char* table_name, const char* column_name) const | |
| 202 { | |
| 203 std::string sql("PRAGMA TABLE_INFO("); | |
| 204 sql.append(table_name); | |
| 205 sql.append(")"); | |
| 206 | |
| 207 // Our SQL is non-mutating, so this cast is OK. | |
| 208 Statement statement(const_cast<Connection&>(*this), sql.c_str()); | |
| 209 | |
| 210 while (statement.Step()) { | |
| 211 if (!statement.ColumnString(1).compare(column_name)) | |
| 212 return true; | |
| 213 } | |
| 214 return false; | |
| 215 } | |
| 216 | |
| 217 int64_t Connection::GetLastInsertRowId() const | |
| 218 { | |
| 219 return sqlite3_last_insert_rowid(db_); | |
| 220 } | |
| 221 | |
| 222 int Connection::GetLastChangeCount() const | |
| 223 { | |
| 224 return sqlite3_changes(db_); | |
| 225 } | |
| 226 | |
| 227 int Connection::GetErrorCode() const | |
| 228 { | |
| 229 return sqlite3_errcode(db_); | |
| 230 } | |
| 231 | |
| 232 int Connection::GetLastErrno() const | |
| 233 { | |
| 234 int err = 0; | |
| 235 if (SQLITE_OK != sqlite3_file_control(db_, NULL, SQLITE_LAST_ERRNO, &err)) | |
| 236 return -2; | |
| 237 | |
| 238 return err; | |
| 239 } | |
| 240 | |
| 241 const char* Connection::GetErrorMessage() const | |
| 242 { | |
| 243 return sqlite3_errmsg(db_); | |
| 244 } | |
| 245 | |
| 246 | |
| 247 bool Connection::BeginTransaction() | |
| 248 { | |
| 249 if (needsRollback_) | |
| 250 { | |
| 251 assert(transactionNesting_ > 0); | |
| 252 | |
| 253 // When we're going to rollback, fail on this begin and don't actually | |
| 254 // mark us as entering the nested transaction. | |
| 255 return false; | |
| 256 } | |
| 257 | |
| 258 bool success = true; | |
| 259 if (!transactionNesting_) | |
| 260 { | |
| 261 needsRollback_ = false; | |
| 262 | |
| 263 Statement begin(*this, SQLITE_FROM_HERE, "BEGIN TRANSACTION"); | |
| 264 if (!begin.Run()) | |
| 265 return false; | |
| 266 } | |
| 267 transactionNesting_++; | |
| 268 return success; | |
| 269 } | |
| 270 | |
| 271 void Connection::RollbackTransaction() | |
| 272 { | |
| 273 if (!transactionNesting_) | |
| 274 { | |
| 59 | 275 throw OrthancException("Rolling back a nonexistent transaction"); |
| 0 | 276 } |
| 277 | |
| 278 transactionNesting_--; | |
| 279 | |
| 280 if (transactionNesting_ > 0) | |
| 281 { | |
| 282 // Mark the outermost transaction as needing rollback. | |
| 283 needsRollback_ = true; | |
| 284 return; | |
| 285 } | |
| 286 | |
| 287 DoRollback(); | |
| 288 } | |
| 289 | |
| 290 bool Connection::CommitTransaction() | |
| 291 { | |
| 292 if (!transactionNesting_) | |
| 293 { | |
| 59 | 294 throw OrthancException("Committing a nonexistent transaction"); |
| 0 | 295 } |
| 296 transactionNesting_--; | |
| 297 | |
| 298 if (transactionNesting_ > 0) | |
| 299 { | |
| 300 // Mark any nested transactions as failing after we've already got one. | |
| 301 return !needsRollback_; | |
| 302 } | |
| 303 | |
| 304 if (needsRollback_) | |
| 305 { | |
| 306 DoRollback(); | |
| 307 return false; | |
| 308 } | |
| 309 | |
| 310 Statement commit(*this, SQLITE_FROM_HERE, "COMMIT"); | |
| 311 return commit.Run(); | |
| 312 } | |
| 313 | |
| 314 void Connection::DoRollback() | |
| 315 { | |
| 316 Statement rollback(*this, SQLITE_FROM_HERE, "ROLLBACK"); | |
| 317 rollback.Run(); | |
| 318 needsRollback_ = false; | |
| 319 } | |
| 320 | |
| 321 | |
| 322 | |
| 323 | |
| 324 | |
| 325 | |
| 326 static void ScalarFunctionCaller(sqlite3_context* rawContext, | |
| 327 int argc, | |
| 328 sqlite3_value** argv) | |
| 329 { | |
| 330 FunctionContext context(rawContext, argc, argv); | |
| 331 | |
| 332 void* payload = sqlite3_user_data(rawContext); | |
| 333 assert(payload != NULL); | |
| 334 | |
| 656 | 335 IScalarFunction& func = *reinterpret_cast<IScalarFunction*>(payload); |
| 0 | 336 func.Compute(context); |
| 337 } | |
| 338 | |
| 339 | |
| 340 static void ScalarFunctionDestroyer(void* payload) | |
| 341 { | |
| 342 assert(payload != NULL); | |
| 656 | 343 delete reinterpret_cast<IScalarFunction*>(payload); |
| 0 | 344 } |
| 345 | |
| 346 | |
| 347 IScalarFunction* Connection::Register(IScalarFunction* func) | |
| 348 { | |
| 349 int err = sqlite3_create_function_v2(db_, | |
| 350 func->GetName(), | |
| 351 func->GetCardinality(), | |
| 352 SQLITE_UTF8, | |
| 353 func, | |
| 354 ScalarFunctionCaller, | |
| 355 NULL, | |
| 356 NULL, | |
| 357 ScalarFunctionDestroyer); | |
| 358 | |
| 359 if (err != SQLITE_OK) | |
| 360 { | |
| 361 delete func; | |
| 59 | 362 throw OrthancException("SQLite: Unable to register a function"); |
| 0 | 363 } |
| 364 | |
| 365 return func; | |
| 366 } | |
| 367 | |
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369 void Connection::FlushToDisk() |
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370 { |
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371 VLOG(1) << "SQLite::Connection::FlushToDisk"; |
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372 int err = sqlite3_wal_checkpoint(db_, NULL); |
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373 |
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374 if (err != SQLITE_OK) |
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375 { |
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376 throw OrthancException("SQLite: Unable to flush the database"); |
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377 } |
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378 } |
| 0 | 379 } |
| 380 } |