Mercurial > hg > orthanc
annotate Core/SQLite/Connection.cpp @ 689:2d0a347e8cfc
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| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Mon, 03 Feb 2014 16:06:58 +0100 |
| parents | 08eca5d86aad |
| children | a811bdf8b8eb |
| rev | line source |
|---|---|
| 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 | |
| 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;"); | |
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91 Execute("PRAGMA RECURSIVE_TRIGGERS=ON;"); |
| 0 | 92 } |
| 93 | |
| 94 void Connection::OpenInMemory() | |
| 95 { | |
| 96 Open(":memory:"); | |
| 97 } | |
| 98 | |
| 99 void Connection::Close() | |
| 100 { | |
| 101 ClearCache(); | |
| 102 | |
| 103 if (db_) | |
| 104 { | |
| 105 sqlite3_close(db_); | |
| 106 db_ = NULL; | |
| 107 } | |
| 108 } | |
| 109 | |
| 110 void Connection::ClearCache() | |
| 111 { | |
| 112 for (CachedStatements::iterator | |
| 113 it = cachedStatements_.begin(); | |
| 656 | 114 it != cachedStatements_.end(); ++it) |
| 0 | 115 { |
| 116 delete it->second; | |
| 117 } | |
| 118 | |
| 119 cachedStatements_.clear(); | |
| 120 } | |
| 121 | |
| 122 | |
| 123 StatementReference& Connection::GetCachedStatement(const StatementId& id, | |
| 124 const char* sql) | |
| 125 { | |
| 126 CachedStatements::iterator i = cachedStatements_.find(id); | |
| 127 if (i != cachedStatements_.end()) | |
| 128 { | |
| 129 if (i->second->GetReferenceCount() >= 1) | |
| 130 { | |
| 59 | 131 throw OrthancException("SQLite: This cached statement is already being referred to"); |
| 0 | 132 } |
| 133 | |
| 134 return *i->second; | |
| 135 } | |
| 136 else | |
| 137 { | |
| 138 StatementReference* statement = new StatementReference(db_, sql); | |
| 139 cachedStatements_[id] = statement; | |
| 140 return *statement; | |
| 141 } | |
| 142 } | |
| 143 | |
| 144 | |
| 145 bool Connection::Execute(const char* sql) | |
| 146 { | |
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147 VLOG(1) << "SQLite::Connection::Execute " << sql; |
| 0 | 148 CheckIsOpen(); |
| 149 | |
| 150 int error = sqlite3_exec(db_, sql, NULL, NULL, NULL); | |
| 151 if (error == SQLITE_ERROR) | |
| 152 { | |
| 59 | 153 throw OrthancException("SQLite Execute error: " + std::string(sqlite3_errmsg(db_))); |
| 0 | 154 } |
| 155 else | |
| 156 { | |
| 157 return error == SQLITE_OK; | |
| 158 } | |
| 159 } | |
| 160 | |
| 161 int Connection::ExecuteAndReturnErrorCode(const char* sql) | |
| 162 { | |
| 163 CheckIsOpen(); | |
| 164 return sqlite3_exec(db_, sql, NULL, NULL, NULL); | |
| 165 } | |
| 166 | |
| 167 // Info querying ------------------------------------------------------------- | |
| 168 | |
| 169 bool Connection::IsSQLValid(const char* sql) | |
| 170 { | |
| 171 sqlite3_stmt* stmt = NULL; | |
| 172 if (sqlite3_prepare_v2(db_, sql, -1, &stmt, NULL) != SQLITE_OK) | |
| 173 return false; | |
| 174 | |
| 175 sqlite3_finalize(stmt); | |
| 176 return true; | |
| 177 } | |
| 178 | |
| 179 bool Connection::DoesTableOrIndexExist(const char* name, | |
| 180 const char* type) const | |
| 181 { | |
| 182 // Our SQL is non-mutating, so this cast is OK. | |
| 183 Statement statement(const_cast<Connection&>(*this), | |
| 184 "SELECT name FROM sqlite_master WHERE type=? AND name=?"); | |
| 185 statement.BindString(0, type); | |
| 186 statement.BindString(1, name); | |
| 187 return statement.Step(); // Table exists if any row was returned. | |
| 188 } | |
| 189 | |
| 190 bool Connection::DoesTableExist(const char* table_name) const | |
| 191 { | |
| 192 return DoesTableOrIndexExist(table_name, "table"); | |
| 193 } | |
| 194 | |
| 195 bool Connection::DoesIndexExist(const char* index_name) const | |
| 196 { | |
| 197 return DoesTableOrIndexExist(index_name, "index"); | |
| 198 } | |
| 199 | |
| 200 bool Connection::DoesColumnExist(const char* table_name, const char* column_name) const | |
| 201 { | |
| 202 std::string sql("PRAGMA TABLE_INFO("); | |
| 203 sql.append(table_name); | |
| 204 sql.append(")"); | |
| 205 | |
| 206 // Our SQL is non-mutating, so this cast is OK. | |
| 207 Statement statement(const_cast<Connection&>(*this), sql.c_str()); | |
| 208 | |
| 209 while (statement.Step()) { | |
| 210 if (!statement.ColumnString(1).compare(column_name)) | |
| 211 return true; | |
| 212 } | |
| 213 return false; | |
| 214 } | |
| 215 | |
| 216 int64_t Connection::GetLastInsertRowId() const | |
| 217 { | |
| 218 return sqlite3_last_insert_rowid(db_); | |
| 219 } | |
| 220 | |
| 221 int Connection::GetLastChangeCount() const | |
| 222 { | |
| 223 return sqlite3_changes(db_); | |
| 224 } | |
| 225 | |
| 226 int Connection::GetErrorCode() const | |
| 227 { | |
| 228 return sqlite3_errcode(db_); | |
| 229 } | |
| 230 | |
| 231 int Connection::GetLastErrno() const | |
| 232 { | |
| 233 int err = 0; | |
| 234 if (SQLITE_OK != sqlite3_file_control(db_, NULL, SQLITE_LAST_ERRNO, &err)) | |
| 235 return -2; | |
| 236 | |
| 237 return err; | |
| 238 } | |
| 239 | |
| 240 const char* Connection::GetErrorMessage() const | |
| 241 { | |
| 242 return sqlite3_errmsg(db_); | |
| 243 } | |
| 244 | |
| 245 | |
| 246 bool Connection::BeginTransaction() | |
| 247 { | |
| 248 if (needsRollback_) | |
| 249 { | |
| 250 assert(transactionNesting_ > 0); | |
| 251 | |
| 252 // When we're going to rollback, fail on this begin and don't actually | |
| 253 // mark us as entering the nested transaction. | |
| 254 return false; | |
| 255 } | |
| 256 | |
| 257 bool success = true; | |
| 258 if (!transactionNesting_) | |
| 259 { | |
| 260 needsRollback_ = false; | |
| 261 | |
| 262 Statement begin(*this, SQLITE_FROM_HERE, "BEGIN TRANSACTION"); | |
| 263 if (!begin.Run()) | |
| 264 return false; | |
| 265 } | |
| 266 transactionNesting_++; | |
| 267 return success; | |
| 268 } | |
| 269 | |
| 270 void Connection::RollbackTransaction() | |
| 271 { | |
| 272 if (!transactionNesting_) | |
| 273 { | |
| 59 | 274 throw OrthancException("Rolling back a nonexistent transaction"); |
| 0 | 275 } |
| 276 | |
| 277 transactionNesting_--; | |
| 278 | |
| 279 if (transactionNesting_ > 0) | |
| 280 { | |
| 281 // Mark the outermost transaction as needing rollback. | |
| 282 needsRollback_ = true; | |
| 283 return; | |
| 284 } | |
| 285 | |
| 286 DoRollback(); | |
| 287 } | |
| 288 | |
| 289 bool Connection::CommitTransaction() | |
| 290 { | |
| 291 if (!transactionNesting_) | |
| 292 { | |
| 59 | 293 throw OrthancException("Committing a nonexistent transaction"); |
| 0 | 294 } |
| 295 transactionNesting_--; | |
| 296 | |
| 297 if (transactionNesting_ > 0) | |
| 298 { | |
| 299 // Mark any nested transactions as failing after we've already got one. | |
| 300 return !needsRollback_; | |
| 301 } | |
| 302 | |
| 303 if (needsRollback_) | |
| 304 { | |
| 305 DoRollback(); | |
| 306 return false; | |
| 307 } | |
| 308 | |
| 309 Statement commit(*this, SQLITE_FROM_HERE, "COMMIT"); | |
| 310 return commit.Run(); | |
| 311 } | |
| 312 | |
| 313 void Connection::DoRollback() | |
| 314 { | |
| 315 Statement rollback(*this, SQLITE_FROM_HERE, "ROLLBACK"); | |
| 316 rollback.Run(); | |
| 317 needsRollback_ = false; | |
| 318 } | |
| 319 | |
| 320 | |
| 321 | |
| 322 | |
| 323 | |
| 324 | |
| 325 static void ScalarFunctionCaller(sqlite3_context* rawContext, | |
| 326 int argc, | |
| 327 sqlite3_value** argv) | |
| 328 { | |
| 329 FunctionContext context(rawContext, argc, argv); | |
| 330 | |
| 331 void* payload = sqlite3_user_data(rawContext); | |
| 332 assert(payload != NULL); | |
| 333 | |
| 656 | 334 IScalarFunction& func = *reinterpret_cast<IScalarFunction*>(payload); |
| 0 | 335 func.Compute(context); |
| 336 } | |
| 337 | |
| 338 | |
| 339 static void ScalarFunctionDestroyer(void* payload) | |
| 340 { | |
| 341 assert(payload != NULL); | |
| 656 | 342 delete reinterpret_cast<IScalarFunction*>(payload); |
| 0 | 343 } |
| 344 | |
| 345 | |
| 346 IScalarFunction* Connection::Register(IScalarFunction* func) | |
| 347 { | |
| 348 int err = sqlite3_create_function_v2(db_, | |
| 349 func->GetName(), | |
| 350 func->GetCardinality(), | |
| 351 SQLITE_UTF8, | |
| 352 func, | |
| 353 ScalarFunctionCaller, | |
| 354 NULL, | |
| 355 NULL, | |
| 356 ScalarFunctionDestroyer); | |
| 357 | |
| 358 if (err != SQLITE_OK) | |
| 359 { | |
| 360 delete func; | |
| 59 | 361 throw OrthancException("SQLite: Unable to register a function"); |
| 0 | 362 } |
| 363 | |
| 364 return func; | |
| 365 } | |
| 366 | |
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368 void Connection::FlushToDisk() |
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369 { |
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370 VLOG(1) << "SQLite::Connection::FlushToDisk"; |
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371 int err = sqlite3_wal_checkpoint(db_, NULL); |
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372 |
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373 if (err != SQLITE_OK) |
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374 { |
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375 throw OrthancException("SQLite: Unable to flush the database"); |
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376 } |
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377 } |
| 0 | 378 } |
| 379 } |