Mercurial > hg > orthanc
annotate Core/SQLite/Connection.cpp @ 206:4453a010d0db
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Wed, 28 Nov 2012 12:03:18 +0100 |
| parents | 2dece1526c06 |
| children | 42e87c17cab8 |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 59 | 2 * Orthanc - A Lightweight, RESTful DICOM Store |
| 0 | 3 * Copyright (C) 2012 Medical Physics Department, CHU of Liege, |
| 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 | |
| 37 #include "Connection.h" | |
| 38 | |
| 39 #include <memory> | |
| 40 #include <cassert> | |
| 41 #include <sqlite3.h> | |
| 42 #include <string.h> | |
| 43 | |
|
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44 #include <glog/logging.h> |
| 0 | 45 |
| 46 | |
| 59 | 47 namespace Orthanc |
| 0 | 48 { |
| 49 namespace SQLite | |
| 50 { | |
| 51 Connection::Connection() : | |
| 52 db_(NULL), | |
| 53 transactionNesting_(0), | |
| 54 needsRollback_(false) | |
| 55 { | |
| 56 } | |
| 57 | |
| 58 | |
| 59 Connection::~Connection() | |
| 60 { | |
| 61 Close(); | |
| 62 } | |
| 63 | |
| 64 | |
| 65 void Connection::CheckIsOpen() const | |
| 66 { | |
| 67 if (!db_) | |
| 68 { | |
| 59 | 69 throw OrthancException("SQLite: The database is not opened"); |
| 0 | 70 } |
| 71 } | |
| 72 | |
| 73 void Connection::Open(const std::string& path) | |
| 74 { | |
| 75 if (db_) | |
| 76 { | |
| 59 | 77 throw OrthancException("SQLite: Connection is already open"); |
| 0 | 78 } |
| 79 | |
| 80 int err = sqlite3_open(path.c_str(), &db_); | |
| 81 if (err != SQLITE_OK) | |
| 82 { | |
| 83 Close(); | |
| 84 db_ = NULL; | |
| 59 | 85 throw OrthancException("SQLite: Unable to open the database"); |
| 0 | 86 } |
| 87 | |
| 88 // Execute PRAGMAs at this point | |
| 89 // http://www.sqlite.org/pragma.html | |
| 90 Execute("PRAGMA FOREIGN_KEYS=ON;"); | |
| 91 | |
|
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92 Execute("PRAGMA RECURSIVE_TRIGGERS=ON;"); |
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93 |
| 0 | 94 // Performance tuning |
| 95 Execute("PRAGMA SYNCHRONOUS=NORMAL;"); | |
| 96 Execute("PRAGMA JOURNAL_MODE=WAL;"); | |
| 97 Execute("PRAGMA LOCKING_MODE=EXCLUSIVE;"); | |
| 98 Execute("PRAGMA WAL_AUTOCHECKPOINT=1000;"); | |
| 99 //Execute("PRAGMA TEMP_STORE=memory"); | |
| 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(); | |
| 122 it != cachedStatements_.end(); it++) | |
| 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 { | |
| 59 | 139 throw OrthancException("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 VLOG(1) << "SQLite::Connection::Execute " << sql; |
| 0 | 156 CheckIsOpen(); |
| 157 | |
| 158 int error = sqlite3_exec(db_, sql, NULL, NULL, NULL); | |
| 159 if (error == SQLITE_ERROR) | |
| 160 { | |
| 59 | 161 throw OrthancException("SQLite Execute error: " + std::string(sqlite3_errmsg(db_))); |
| 0 | 162 } |
| 163 else | |
| 164 { | |
| 165 return error == SQLITE_OK; | |
| 166 } | |
| 167 } | |
| 168 | |
| 169 int Connection::ExecuteAndReturnErrorCode(const char* sql) | |
| 170 { | |
| 171 CheckIsOpen(); | |
| 172 return sqlite3_exec(db_, sql, NULL, NULL, NULL); | |
| 173 } | |
| 174 | |
| 175 // Info querying ------------------------------------------------------------- | |
| 176 | |
| 177 bool Connection::IsSQLValid(const char* sql) | |
| 178 { | |
| 179 sqlite3_stmt* stmt = NULL; | |
| 180 if (sqlite3_prepare_v2(db_, sql, -1, &stmt, NULL) != SQLITE_OK) | |
| 181 return false; | |
| 182 | |
| 183 sqlite3_finalize(stmt); | |
| 184 return true; | |
| 185 } | |
| 186 | |
| 187 bool Connection::DoesTableOrIndexExist(const char* name, | |
| 188 const char* type) const | |
| 189 { | |
| 190 // Our SQL is non-mutating, so this cast is OK. | |
| 191 Statement statement(const_cast<Connection&>(*this), | |
| 192 "SELECT name FROM sqlite_master WHERE type=? AND name=?"); | |
| 193 statement.BindString(0, type); | |
| 194 statement.BindString(1, name); | |
| 195 return statement.Step(); // Table exists if any row was returned. | |
| 196 } | |
| 197 | |
| 198 bool Connection::DoesTableExist(const char* table_name) const | |
| 199 { | |
| 200 return DoesTableOrIndexExist(table_name, "table"); | |
| 201 } | |
| 202 | |
| 203 bool Connection::DoesIndexExist(const char* index_name) const | |
| 204 { | |
| 205 return DoesTableOrIndexExist(index_name, "index"); | |
| 206 } | |
| 207 | |
| 208 bool Connection::DoesColumnExist(const char* table_name, const char* column_name) const | |
| 209 { | |
| 210 std::string sql("PRAGMA TABLE_INFO("); | |
| 211 sql.append(table_name); | |
| 212 sql.append(")"); | |
| 213 | |
| 214 // Our SQL is non-mutating, so this cast is OK. | |
| 215 Statement statement(const_cast<Connection&>(*this), sql.c_str()); | |
| 216 | |
| 217 while (statement.Step()) { | |
| 218 if (!statement.ColumnString(1).compare(column_name)) | |
| 219 return true; | |
| 220 } | |
| 221 return false; | |
| 222 } | |
| 223 | |
| 224 int64_t Connection::GetLastInsertRowId() const | |
| 225 { | |
| 226 return sqlite3_last_insert_rowid(db_); | |
| 227 } | |
| 228 | |
| 229 int Connection::GetLastChangeCount() const | |
| 230 { | |
| 231 return sqlite3_changes(db_); | |
| 232 } | |
| 233 | |
| 234 int Connection::GetErrorCode() const | |
| 235 { | |
| 236 return sqlite3_errcode(db_); | |
| 237 } | |
| 238 | |
| 239 int Connection::GetLastErrno() const | |
| 240 { | |
| 241 int err = 0; | |
| 242 if (SQLITE_OK != sqlite3_file_control(db_, NULL, SQLITE_LAST_ERRNO, &err)) | |
| 243 return -2; | |
| 244 | |
| 245 return err; | |
| 246 } | |
| 247 | |
| 248 const char* Connection::GetErrorMessage() const | |
| 249 { | |
| 250 return sqlite3_errmsg(db_); | |
| 251 } | |
| 252 | |
| 253 | |
| 254 bool Connection::BeginTransaction() | |
| 255 { | |
| 256 if (needsRollback_) | |
| 257 { | |
| 258 assert(transactionNesting_ > 0); | |
| 259 | |
| 260 // When we're going to rollback, fail on this begin and don't actually | |
| 261 // mark us as entering the nested transaction. | |
| 262 return false; | |
| 263 } | |
| 264 | |
| 265 bool success = true; | |
| 266 if (!transactionNesting_) | |
| 267 { | |
| 268 needsRollback_ = false; | |
| 269 | |
| 270 Statement begin(*this, SQLITE_FROM_HERE, "BEGIN TRANSACTION"); | |
| 271 if (!begin.Run()) | |
| 272 return false; | |
| 273 } | |
| 274 transactionNesting_++; | |
| 275 return success; | |
| 276 } | |
| 277 | |
| 278 void Connection::RollbackTransaction() | |
| 279 { | |
| 280 if (!transactionNesting_) | |
| 281 { | |
| 59 | 282 throw OrthancException("Rolling back a nonexistent transaction"); |
| 0 | 283 } |
| 284 | |
| 285 transactionNesting_--; | |
| 286 | |
| 287 if (transactionNesting_ > 0) | |
| 288 { | |
| 289 // Mark the outermost transaction as needing rollback. | |
| 290 needsRollback_ = true; | |
| 291 return; | |
| 292 } | |
| 293 | |
| 294 DoRollback(); | |
| 295 } | |
| 296 | |
| 297 bool Connection::CommitTransaction() | |
| 298 { | |
| 299 if (!transactionNesting_) | |
| 300 { | |
| 59 | 301 throw OrthancException("Committing a nonexistent transaction"); |
| 0 | 302 } |
| 303 transactionNesting_--; | |
| 304 | |
| 305 if (transactionNesting_ > 0) | |
| 306 { | |
| 307 // Mark any nested transactions as failing after we've already got one. | |
| 308 return !needsRollback_; | |
| 309 } | |
| 310 | |
| 311 if (needsRollback_) | |
| 312 { | |
| 313 DoRollback(); | |
| 314 return false; | |
| 315 } | |
| 316 | |
| 317 Statement commit(*this, SQLITE_FROM_HERE, "COMMIT"); | |
| 318 return commit.Run(); | |
| 319 } | |
| 320 | |
| 321 void Connection::DoRollback() | |
| 322 { | |
| 323 Statement rollback(*this, SQLITE_FROM_HERE, "ROLLBACK"); | |
| 324 rollback.Run(); | |
| 325 needsRollback_ = false; | |
| 326 } | |
| 327 | |
| 328 | |
| 329 | |
| 330 | |
| 331 | |
| 332 | |
| 333 static void ScalarFunctionCaller(sqlite3_context* rawContext, | |
| 334 int argc, | |
| 335 sqlite3_value** argv) | |
| 336 { | |
| 337 FunctionContext context(rawContext, argc, argv); | |
| 338 | |
| 339 void* payload = sqlite3_user_data(rawContext); | |
| 340 assert(payload != NULL); | |
| 341 | |
| 342 IScalarFunction& func = *(IScalarFunction*) payload; | |
| 343 func.Compute(context); | |
| 344 } | |
| 345 | |
| 346 | |
| 347 static void ScalarFunctionDestroyer(void* payload) | |
| 348 { | |
| 349 assert(payload != NULL); | |
| 350 delete (IScalarFunction*) payload; | |
| 351 } | |
| 352 | |
| 353 | |
| 354 IScalarFunction* Connection::Register(IScalarFunction* func) | |
| 355 { | |
| 356 int err = sqlite3_create_function_v2(db_, | |
| 357 func->GetName(), | |
| 358 func->GetCardinality(), | |
| 359 SQLITE_UTF8, | |
| 360 func, | |
| 361 ScalarFunctionCaller, | |
| 362 NULL, | |
| 363 NULL, | |
| 364 ScalarFunctionDestroyer); | |
| 365 | |
| 366 if (err != SQLITE_OK) | |
| 367 { | |
| 368 delete func; | |
| 59 | 369 throw OrthancException("SQLite: Unable to register a function"); |
| 0 | 370 } |
| 371 | |
| 372 return func; | |
| 373 } | |
| 374 | |
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375 |
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376 void Connection::FlushToDisk() |
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377 { |
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378 VLOG(1) << "SQLite::Connection::FlushToDisk"; |
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379 int err = sqlite3_wal_checkpoint(db_, NULL); |
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380 |
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381 if (err != SQLITE_OK) |
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382 { |
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383 throw OrthancException("SQLite: Unable to flush the database"); |
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384 } |
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385 } |
| 0 | 386 } |
| 387 } |