Mercurial > hg > orthanc
annotate Core/SQLite/Connection.cpp @ 2145:39f4207727db
fix
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 09 Nov 2016 17:09:29 +0100 |
parents | c746e2d42ac8 |
children | fa5ad4368fe3 |
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0 | 1 /** |
59 | 2 * Orthanc - A Lightweight, RESTful DICOM Store |
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3 * |
1900 | 4 * Copyright (C) 2012-2016 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 <string.h> | |
48 | |
1225 | 49 #if ORTHANC_SQLITE_STANDALONE != 1 |
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50 #include "../Logging.h" |
1225 | 51 #endif |
52 | |
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53 #include "sqlite3.h" |
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54 |
1225 | 55 |
59 | 56 namespace Orthanc |
0 | 57 { |
58 namespace SQLite | |
59 { | |
60 Connection::Connection() : | |
61 db_(NULL), | |
62 transactionNesting_(0), | |
63 needsRollback_(false) | |
64 { | |
65 } | |
66 | |
67 | |
68 Connection::~Connection() | |
69 { | |
70 Close(); | |
71 } | |
72 | |
73 | |
74 void Connection::CheckIsOpen() const | |
75 { | |
76 if (!db_) | |
77 { | |
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78 throw OrthancSQLiteException(ErrorCode_SQLiteNotOpened); |
0 | 79 } |
80 } | |
81 | |
82 void Connection::Open(const std::string& path) | |
83 { | |
84 if (db_) | |
85 { | |
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86 throw OrthancSQLiteException(ErrorCode_SQLiteAlreadyOpened); |
0 | 87 } |
88 | |
89 int err = sqlite3_open(path.c_str(), &db_); | |
90 if (err != SQLITE_OK) | |
91 { | |
92 Close(); | |
93 db_ = NULL; | |
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94 throw OrthancSQLiteException(ErrorCode_SQLiteCannotOpen); |
0 | 95 } |
96 | |
97 // Execute PRAGMAs at this point | |
98 // http://www.sqlite.org/pragma.html | |
99 Execute("PRAGMA FOREIGN_KEYS=ON;"); | |
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100 Execute("PRAGMA RECURSIVE_TRIGGERS=ON;"); |
0 | 101 } |
102 | |
103 void Connection::OpenInMemory() | |
104 { | |
105 Open(":memory:"); | |
106 } | |
107 | |
108 void Connection::Close() | |
109 { | |
110 ClearCache(); | |
111 | |
112 if (db_) | |
113 { | |
114 sqlite3_close(db_); | |
115 db_ = NULL; | |
116 } | |
117 } | |
118 | |
119 void Connection::ClearCache() | |
120 { | |
121 for (CachedStatements::iterator | |
122 it = cachedStatements_.begin(); | |
656 | 123 it != cachedStatements_.end(); ++it) |
0 | 124 { |
125 delete it->second; | |
126 } | |
127 | |
128 cachedStatements_.clear(); | |
129 } | |
130 | |
131 | |
132 StatementReference& Connection::GetCachedStatement(const StatementId& id, | |
133 const char* sql) | |
134 { | |
135 CachedStatements::iterator i = cachedStatements_.find(id); | |
136 if (i != cachedStatements_.end()) | |
137 { | |
138 if (i->second->GetReferenceCount() >= 1) | |
139 { | |
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140 throw OrthancSQLiteException(ErrorCode_SQLiteStatementAlreadyUsed); |
0 | 141 } |
142 | |
143 return *i->second; | |
144 } | |
145 else | |
146 { | |
147 StatementReference* statement = new StatementReference(db_, sql); | |
148 cachedStatements_[id] = statement; | |
149 return *statement; | |
150 } | |
151 } | |
152 | |
153 | |
154 bool Connection::Execute(const char* sql) | |
155 { | |
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156 #if ORTHANC_SQLITE_STANDALONE != 1 |
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157 VLOG(1) << "SQLite::Connection::Execute " << sql; |
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158 #endif |
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159 |
0 | 160 CheckIsOpen(); |
161 | |
162 int error = sqlite3_exec(db_, sql, NULL, NULL, NULL); | |
163 if (error == SQLITE_ERROR) | |
164 { | |
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165 #if ORTHANC_SQLITE_STANDALONE != 1 |
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166 LOG(ERROR) << "SQLite execute error: " << sqlite3_errmsg(db_) |
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167 << " (" << sqlite3_extended_errcode(db_) << ")"; |
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168 #endif |
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169 |
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170 throw OrthancSQLiteException(ErrorCode_SQLiteExecute); |
0 | 171 } |
172 else | |
173 { | |
174 return error == SQLITE_OK; | |
175 } | |
176 } | |
177 | |
178 int Connection::ExecuteAndReturnErrorCode(const char* sql) | |
179 { | |
180 CheckIsOpen(); | |
181 return sqlite3_exec(db_, sql, NULL, NULL, NULL); | |
182 } | |
183 | |
184 // Info querying ------------------------------------------------------------- | |
185 | |
186 bool Connection::IsSQLValid(const char* sql) | |
187 { | |
188 sqlite3_stmt* stmt = NULL; | |
189 if (sqlite3_prepare_v2(db_, sql, -1, &stmt, NULL) != SQLITE_OK) | |
190 return false; | |
191 | |
192 sqlite3_finalize(stmt); | |
193 return true; | |
194 } | |
195 | |
196 bool Connection::DoesTableOrIndexExist(const char* name, | |
197 const char* type) const | |
198 { | |
199 // Our SQL is non-mutating, so this cast is OK. | |
200 Statement statement(const_cast<Connection&>(*this), | |
201 "SELECT name FROM sqlite_master WHERE type=? AND name=?"); | |
202 statement.BindString(0, type); | |
203 statement.BindString(1, name); | |
204 return statement.Step(); // Table exists if any row was returned. | |
205 } | |
206 | |
207 bool Connection::DoesTableExist(const char* table_name) const | |
208 { | |
209 return DoesTableOrIndexExist(table_name, "table"); | |
210 } | |
211 | |
212 bool Connection::DoesIndexExist(const char* index_name) const | |
213 { | |
214 return DoesTableOrIndexExist(index_name, "index"); | |
215 } | |
216 | |
217 bool Connection::DoesColumnExist(const char* table_name, const char* column_name) const | |
218 { | |
219 std::string sql("PRAGMA TABLE_INFO("); | |
220 sql.append(table_name); | |
221 sql.append(")"); | |
222 | |
223 // Our SQL is non-mutating, so this cast is OK. | |
224 Statement statement(const_cast<Connection&>(*this), sql.c_str()); | |
225 | |
226 while (statement.Step()) { | |
227 if (!statement.ColumnString(1).compare(column_name)) | |
228 return true; | |
229 } | |
230 return false; | |
231 } | |
232 | |
233 int64_t Connection::GetLastInsertRowId() const | |
234 { | |
235 return sqlite3_last_insert_rowid(db_); | |
236 } | |
237 | |
238 int Connection::GetLastChangeCount() const | |
239 { | |
240 return sqlite3_changes(db_); | |
241 } | |
242 | |
243 int Connection::GetErrorCode() const | |
244 { | |
245 return sqlite3_errcode(db_); | |
246 } | |
247 | |
248 int Connection::GetLastErrno() const | |
249 { | |
250 int err = 0; | |
251 if (SQLITE_OK != sqlite3_file_control(db_, NULL, SQLITE_LAST_ERRNO, &err)) | |
252 return -2; | |
253 | |
254 return err; | |
255 } | |
256 | |
257 const char* Connection::GetErrorMessage() const | |
258 { | |
259 return sqlite3_errmsg(db_); | |
260 } | |
261 | |
262 | |
263 bool Connection::BeginTransaction() | |
264 { | |
265 if (needsRollback_) | |
266 { | |
267 assert(transactionNesting_ > 0); | |
268 | |
269 // When we're going to rollback, fail on this begin and don't actually | |
270 // mark us as entering the nested transaction. | |
271 return false; | |
272 } | |
273 | |
274 bool success = true; | |
275 if (!transactionNesting_) | |
276 { | |
277 needsRollback_ = false; | |
278 | |
279 Statement begin(*this, SQLITE_FROM_HERE, "BEGIN TRANSACTION"); | |
280 if (!begin.Run()) | |
281 return false; | |
282 } | |
283 transactionNesting_++; | |
284 return success; | |
285 } | |
286 | |
287 void Connection::RollbackTransaction() | |
288 { | |
289 if (!transactionNesting_) | |
290 { | |
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291 throw OrthancSQLiteException(ErrorCode_SQLiteRollbackWithoutTransaction); |
0 | 292 } |
293 | |
294 transactionNesting_--; | |
295 | |
296 if (transactionNesting_ > 0) | |
297 { | |
298 // Mark the outermost transaction as needing rollback. | |
299 needsRollback_ = true; | |
300 return; | |
301 } | |
302 | |
303 DoRollback(); | |
304 } | |
305 | |
306 bool Connection::CommitTransaction() | |
307 { | |
308 if (!transactionNesting_) | |
309 { | |
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310 throw OrthancSQLiteException(ErrorCode_SQLiteCommitWithoutTransaction); |
0 | 311 } |
312 transactionNesting_--; | |
313 | |
314 if (transactionNesting_ > 0) | |
315 { | |
316 // Mark any nested transactions as failing after we've already got one. | |
317 return !needsRollback_; | |
318 } | |
319 | |
320 if (needsRollback_) | |
321 { | |
322 DoRollback(); | |
323 return false; | |
324 } | |
325 | |
326 Statement commit(*this, SQLITE_FROM_HERE, "COMMIT"); | |
327 return commit.Run(); | |
328 } | |
329 | |
330 void Connection::DoRollback() | |
331 { | |
332 Statement rollback(*this, SQLITE_FROM_HERE, "ROLLBACK"); | |
333 rollback.Run(); | |
334 needsRollback_ = false; | |
335 } | |
336 | |
337 | |
338 | |
339 | |
340 | |
341 | |
342 static void ScalarFunctionCaller(sqlite3_context* rawContext, | |
343 int argc, | |
344 sqlite3_value** argv) | |
345 { | |
346 FunctionContext context(rawContext, argc, argv); | |
347 | |
348 void* payload = sqlite3_user_data(rawContext); | |
349 assert(payload != NULL); | |
350 | |
656 | 351 IScalarFunction& func = *reinterpret_cast<IScalarFunction*>(payload); |
0 | 352 func.Compute(context); |
353 } | |
354 | |
355 | |
356 static void ScalarFunctionDestroyer(void* payload) | |
357 { | |
358 assert(payload != NULL); | |
656 | 359 delete reinterpret_cast<IScalarFunction*>(payload); |
0 | 360 } |
361 | |
362 | |
363 IScalarFunction* Connection::Register(IScalarFunction* func) | |
364 { | |
365 int err = sqlite3_create_function_v2(db_, | |
366 func->GetName(), | |
367 func->GetCardinality(), | |
368 SQLITE_UTF8, | |
369 func, | |
370 ScalarFunctionCaller, | |
371 NULL, | |
372 NULL, | |
373 ScalarFunctionDestroyer); | |
374 | |
375 if (err != SQLITE_OK) | |
376 { | |
377 delete func; | |
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378 throw OrthancSQLiteException(ErrorCode_SQLiteRegisterFunction); |
0 | 379 } |
380 | |
381 return func; | |
382 } | |
383 | |
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384 |
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385 void Connection::FlushToDisk() |
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386 { |
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387 #if ORTHANC_SQLITE_STANDALONE != 1 |
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388 VLOG(1) << "SQLite::Connection::FlushToDisk"; |
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389 #endif |
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390 |
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391 int err = sqlite3_wal_checkpoint(db_, NULL); |
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392 |
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393 if (err != SQLITE_OK) |
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394 { |
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395 throw OrthancSQLiteException(ErrorCode_SQLiteFlush); |
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396 } |
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397 } |
0 | 398 } |
399 } |