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annotate Core/SQLite/Connection.cpp @ 1462:36143590479d
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Thu, 02 Jul 2015 16:57:35 +0200 |
| parents | 63d47b1fa239 |
| children | 3b68924ffb24 |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 59 | 2 * Orthanc - A Lightweight, RESTful DICOM Store |
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3 * |
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4 * Copyright (C) 2012-2015 Sebastien Jodogne <s.jodogne@gmail.com>, |
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5 * Medical Physics Department, CHU of Liege, Belgium |
| 0 | 6 * |
| 17 | 7 * Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 8 * | |
| 9 * Redistribution and use in source and binary forms, with or without | |
| 10 * modification, are permitted provided that the following conditions are | |
| 11 * met: | |
| 0 | 12 * |
| 17 | 13 * * Redistributions of source code must retain the above copyright |
| 14 * notice, this list of conditions and the following disclaimer. | |
| 15 * * Redistributions in binary form must reproduce the above | |
| 16 * copyright notice, this list of conditions and the following disclaimer | |
| 17 * in the documentation and/or other materials provided with the | |
| 18 * distribution. | |
| 19 * * Neither the name of Google Inc., the name of the CHU of Liege, | |
| 20 * nor the names of its contributors may be used to endorse or promote | |
| 21 * products derived from this software without specific prior written | |
| 22 * permission. | |
| 23 * | |
| 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 25 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 26 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 27 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 28 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 34 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 0 | 35 **/ |
| 36 | |
| 37 | |
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38 #if ORTHANC_SQLITE_STANDALONE != 1 |
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39 #include "../PrecompiledHeaders.h" |
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40 #endif |
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41 |
| 0 | 42 #include "Connection.h" |
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43 #include "OrthancSQLiteException.h" |
| 0 | 44 |
| 45 #include <memory> | |
| 46 #include <cassert> | |
| 47 #include <sqlite3.h> | |
| 48 #include <string.h> | |
| 49 | |
| 1225 | 50 #if ORTHANC_SQLITE_STANDALONE != 1 |
| 51 #include <glog/logging.h> | |
| 52 #endif | |
| 53 | |
| 54 | |
| 59 | 55 namespace Orthanc |
| 0 | 56 { |
| 57 namespace SQLite | |
| 58 { | |
| 59 Connection::Connection() : | |
| 60 db_(NULL), | |
| 61 transactionNesting_(0), | |
| 62 needsRollback_(false) | |
| 63 { | |
| 64 } | |
| 65 | |
| 66 | |
| 67 Connection::~Connection() | |
| 68 { | |
| 69 Close(); | |
| 70 } | |
| 71 | |
| 72 | |
| 73 void Connection::CheckIsOpen() const | |
| 74 { | |
| 75 if (!db_) | |
| 76 { | |
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77 throw OrthancSQLiteException("SQLite: The database is not opened"); |
| 0 | 78 } |
| 79 } | |
| 80 | |
| 81 void Connection::Open(const std::string& path) | |
| 82 { | |
| 83 if (db_) | |
| 84 { | |
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85 throw OrthancSQLiteException("SQLite: Connection is already open"); |
| 0 | 86 } |
| 87 | |
| 88 int err = sqlite3_open(path.c_str(), &db_); | |
| 89 if (err != SQLITE_OK) | |
| 90 { | |
| 91 Close(); | |
| 92 db_ = NULL; | |
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93 throw OrthancSQLiteException("SQLite: Unable to open the database"); |
| 0 | 94 } |
| 95 | |
| 96 // Execute PRAGMAs at this point | |
| 97 // http://www.sqlite.org/pragma.html | |
| 98 Execute("PRAGMA FOREIGN_KEYS=ON;"); | |
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99 Execute("PRAGMA RECURSIVE_TRIGGERS=ON;"); |
| 0 | 100 } |
| 101 | |
| 102 void Connection::OpenInMemory() | |
| 103 { | |
| 104 Open(":memory:"); | |
| 105 } | |
| 106 | |
| 107 void Connection::Close() | |
| 108 { | |
| 109 ClearCache(); | |
| 110 | |
| 111 if (db_) | |
| 112 { | |
| 113 sqlite3_close(db_); | |
| 114 db_ = NULL; | |
| 115 } | |
| 116 } | |
| 117 | |
| 118 void Connection::ClearCache() | |
| 119 { | |
| 120 for (CachedStatements::iterator | |
| 121 it = cachedStatements_.begin(); | |
| 656 | 122 it != cachedStatements_.end(); ++it) |
| 0 | 123 { |
| 124 delete it->second; | |
| 125 } | |
| 126 | |
| 127 cachedStatements_.clear(); | |
| 128 } | |
| 129 | |
| 130 | |
| 131 StatementReference& Connection::GetCachedStatement(const StatementId& id, | |
| 132 const char* sql) | |
| 133 { | |
| 134 CachedStatements::iterator i = cachedStatements_.find(id); | |
| 135 if (i != cachedStatements_.end()) | |
| 136 { | |
| 137 if (i->second->GetReferenceCount() >= 1) | |
| 138 { | |
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139 throw OrthancSQLiteException("SQLite: This cached statement is already being referred to"); |
| 0 | 140 } |
| 141 | |
| 142 return *i->second; | |
| 143 } | |
| 144 else | |
| 145 { | |
| 146 StatementReference* statement = new StatementReference(db_, sql); | |
| 147 cachedStatements_[id] = statement; | |
| 148 return *statement; | |
| 149 } | |
| 150 } | |
| 151 | |
| 152 | |
| 153 bool Connection::Execute(const char* sql) | |
| 154 { | |
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155 #if ORTHANC_SQLITE_STANDALONE != 1 |
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156 VLOG(1) << "SQLite::Connection::Execute " << sql; |
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157 #endif |
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158 |
| 0 | 159 CheckIsOpen(); |
| 160 | |
| 161 int error = sqlite3_exec(db_, sql, NULL, NULL, NULL); | |
| 162 if (error == SQLITE_ERROR) | |
| 163 { | |
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164 throw OrthancSQLiteException("SQLite Execute error: " + std::string(sqlite3_errmsg(db_))); |
| 0 | 165 } |
| 166 else | |
| 167 { | |
| 168 return error == SQLITE_OK; | |
| 169 } | |
| 170 } | |
| 171 | |
| 172 int Connection::ExecuteAndReturnErrorCode(const char* sql) | |
| 173 { | |
| 174 CheckIsOpen(); | |
| 175 return sqlite3_exec(db_, sql, NULL, NULL, NULL); | |
| 176 } | |
| 177 | |
| 178 // Info querying ------------------------------------------------------------- | |
| 179 | |
| 180 bool Connection::IsSQLValid(const char* sql) | |
| 181 { | |
| 182 sqlite3_stmt* stmt = NULL; | |
| 183 if (sqlite3_prepare_v2(db_, sql, -1, &stmt, NULL) != SQLITE_OK) | |
| 184 return false; | |
| 185 | |
| 186 sqlite3_finalize(stmt); | |
| 187 return true; | |
| 188 } | |
| 189 | |
| 190 bool Connection::DoesTableOrIndexExist(const char* name, | |
| 191 const char* type) const | |
| 192 { | |
| 193 // Our SQL is non-mutating, so this cast is OK. | |
| 194 Statement statement(const_cast<Connection&>(*this), | |
| 195 "SELECT name FROM sqlite_master WHERE type=? AND name=?"); | |
| 196 statement.BindString(0, type); | |
| 197 statement.BindString(1, name); | |
| 198 return statement.Step(); // Table exists if any row was returned. | |
| 199 } | |
| 200 | |
| 201 bool Connection::DoesTableExist(const char* table_name) const | |
| 202 { | |
| 203 return DoesTableOrIndexExist(table_name, "table"); | |
| 204 } | |
| 205 | |
| 206 bool Connection::DoesIndexExist(const char* index_name) const | |
| 207 { | |
| 208 return DoesTableOrIndexExist(index_name, "index"); | |
| 209 } | |
| 210 | |
| 211 bool Connection::DoesColumnExist(const char* table_name, const char* column_name) const | |
| 212 { | |
| 213 std::string sql("PRAGMA TABLE_INFO("); | |
| 214 sql.append(table_name); | |
| 215 sql.append(")"); | |
| 216 | |
| 217 // Our SQL is non-mutating, so this cast is OK. | |
| 218 Statement statement(const_cast<Connection&>(*this), sql.c_str()); | |
| 219 | |
| 220 while (statement.Step()) { | |
| 221 if (!statement.ColumnString(1).compare(column_name)) | |
| 222 return true; | |
| 223 } | |
| 224 return false; | |
| 225 } | |
| 226 | |
| 227 int64_t Connection::GetLastInsertRowId() const | |
| 228 { | |
| 229 return sqlite3_last_insert_rowid(db_); | |
| 230 } | |
| 231 | |
| 232 int Connection::GetLastChangeCount() const | |
| 233 { | |
| 234 return sqlite3_changes(db_); | |
| 235 } | |
| 236 | |
| 237 int Connection::GetErrorCode() const | |
| 238 { | |
| 239 return sqlite3_errcode(db_); | |
| 240 } | |
| 241 | |
| 242 int Connection::GetLastErrno() const | |
| 243 { | |
| 244 int err = 0; | |
| 245 if (SQLITE_OK != sqlite3_file_control(db_, NULL, SQLITE_LAST_ERRNO, &err)) | |
| 246 return -2; | |
| 247 | |
| 248 return err; | |
| 249 } | |
| 250 | |
| 251 const char* Connection::GetErrorMessage() const | |
| 252 { | |
| 253 return sqlite3_errmsg(db_); | |
| 254 } | |
| 255 | |
| 256 | |
| 257 bool Connection::BeginTransaction() | |
| 258 { | |
| 259 if (needsRollback_) | |
| 260 { | |
| 261 assert(transactionNesting_ > 0); | |
| 262 | |
| 263 // When we're going to rollback, fail on this begin and don't actually | |
| 264 // mark us as entering the nested transaction. | |
| 265 return false; | |
| 266 } | |
| 267 | |
| 268 bool success = true; | |
| 269 if (!transactionNesting_) | |
| 270 { | |
| 271 needsRollback_ = false; | |
| 272 | |
| 273 Statement begin(*this, SQLITE_FROM_HERE, "BEGIN TRANSACTION"); | |
| 274 if (!begin.Run()) | |
| 275 return false; | |
| 276 } | |
| 277 transactionNesting_++; | |
| 278 return success; | |
| 279 } | |
| 280 | |
| 281 void Connection::RollbackTransaction() | |
| 282 { | |
| 283 if (!transactionNesting_) | |
| 284 { | |
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285 throw OrthancSQLiteException("Rolling back a nonexistent transaction"); |
| 0 | 286 } |
| 287 | |
| 288 transactionNesting_--; | |
| 289 | |
| 290 if (transactionNesting_ > 0) | |
| 291 { | |
| 292 // Mark the outermost transaction as needing rollback. | |
| 293 needsRollback_ = true; | |
| 294 return; | |
| 295 } | |
| 296 | |
| 297 DoRollback(); | |
| 298 } | |
| 299 | |
| 300 bool Connection::CommitTransaction() | |
| 301 { | |
| 302 if (!transactionNesting_) | |
| 303 { | |
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304 throw OrthancSQLiteException("Committing a nonexistent transaction"); |
| 0 | 305 } |
| 306 transactionNesting_--; | |
| 307 | |
| 308 if (transactionNesting_ > 0) | |
| 309 { | |
| 310 // Mark any nested transactions as failing after we've already got one. | |
| 311 return !needsRollback_; | |
| 312 } | |
| 313 | |
| 314 if (needsRollback_) | |
| 315 { | |
| 316 DoRollback(); | |
| 317 return false; | |
| 318 } | |
| 319 | |
| 320 Statement commit(*this, SQLITE_FROM_HERE, "COMMIT"); | |
| 321 return commit.Run(); | |
| 322 } | |
| 323 | |
| 324 void Connection::DoRollback() | |
| 325 { | |
| 326 Statement rollback(*this, SQLITE_FROM_HERE, "ROLLBACK"); | |
| 327 rollback.Run(); | |
| 328 needsRollback_ = false; | |
| 329 } | |
| 330 | |
| 331 | |
| 332 | |
| 333 | |
| 334 | |
| 335 | |
| 336 static void ScalarFunctionCaller(sqlite3_context* rawContext, | |
| 337 int argc, | |
| 338 sqlite3_value** argv) | |
| 339 { | |
| 340 FunctionContext context(rawContext, argc, argv); | |
| 341 | |
| 342 void* payload = sqlite3_user_data(rawContext); | |
| 343 assert(payload != NULL); | |
| 344 | |
| 656 | 345 IScalarFunction& func = *reinterpret_cast<IScalarFunction*>(payload); |
| 0 | 346 func.Compute(context); |
| 347 } | |
| 348 | |
| 349 | |
| 350 static void ScalarFunctionDestroyer(void* payload) | |
| 351 { | |
| 352 assert(payload != NULL); | |
| 656 | 353 delete reinterpret_cast<IScalarFunction*>(payload); |
| 0 | 354 } |
| 355 | |
| 356 | |
| 357 IScalarFunction* Connection::Register(IScalarFunction* func) | |
| 358 { | |
| 359 int err = sqlite3_create_function_v2(db_, | |
| 360 func->GetName(), | |
| 361 func->GetCardinality(), | |
| 362 SQLITE_UTF8, | |
| 363 func, | |
| 364 ScalarFunctionCaller, | |
| 365 NULL, | |
| 366 NULL, | |
| 367 ScalarFunctionDestroyer); | |
| 368 | |
| 369 if (err != SQLITE_OK) | |
| 370 { | |
| 371 delete func; | |
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372 throw OrthancSQLiteException("SQLite: Unable to register a function"); |
| 0 | 373 } |
| 374 | |
| 375 return func; | |
| 376 } | |
| 377 | |
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378 |
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379 void Connection::FlushToDisk() |
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380 { |
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381 #if ORTHANC_SQLITE_STANDALONE != 1 |
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382 VLOG(1) << "SQLite::Connection::FlushToDisk"; |
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383 #endif |
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384 |
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385 int err = sqlite3_wal_checkpoint(db_, NULL); |
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386 |
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387 if (err != SQLITE_OK) |
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388 { |
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389 throw OrthancSQLiteException("SQLite: Unable to flush the database"); |
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390 } |
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391 } |
| 0 | 392 } |
| 393 } |