Mercurial > hg > orthanc-databases
annotate Framework/Common/DatabaseManager.cpp @ 124:a981ef52bcf6
fix build with postgresql 11
author | jodogne |
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date | Fri, 08 Feb 2019 18:10:41 +0100 |
parents | 569e17419eae |
children | 260fc55f10cd 4cd7e45b671e |
rev | line source |
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0 | 1 /** |
2 * Orthanc - A Lightweight, RESTful DICOM Store | |
3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
4 * Department, University Hospital of Liege, Belgium | |
67 | 5 * Copyright (C) 2017-2019 Osimis S.A., Belgium |
0 | 6 * |
7 * This program is free software: you can redistribute it and/or | |
8 * modify it under the terms of the GNU Affero General Public License | |
9 * as published by the Free Software Foundation, either version 3 of | |
10 * the License, or (at your option) any later version. | |
11 * | |
12 * This program is distributed in the hope that it will be useful, but | |
13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 * Affero General Public License for more details. | |
16 * | |
17 * You should have received a copy of the GNU Affero General Public License | |
18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
19 **/ | |
20 | |
21 | |
22 #include "DatabaseManager.h" | |
23 | |
116 | 24 #include <Plugins/Samples/Common/OrthancPluginCppWrapper.h> |
25 | |
0 | 26 #include <Core/Logging.h> |
27 #include <Core/OrthancException.h> | |
28 | |
29 #include <boost/thread.hpp> | |
30 | |
31 namespace OrthancDatabases | |
32 { | |
33 IDatabase& DatabaseManager::GetDatabase() | |
34 { | |
35 static const unsigned int MAX_CONNECTION_ATTEMPTS = 10; // TODO: Parameter | |
36 | |
37 unsigned int count = 0; | |
38 | |
39 while (database_.get() == NULL) | |
40 { | |
41 transaction_.reset(NULL); | |
42 | |
43 try | |
44 { | |
45 database_.reset(factory_->Open()); | |
46 } | |
47 catch (Orthanc::OrthancException& e) | |
48 { | |
49 if (e.GetErrorCode() == Orthanc::ErrorCode_DatabaseUnavailable) | |
50 { | |
51 count ++; | |
52 | |
53 if (count <= MAX_CONNECTION_ATTEMPTS) | |
54 { | |
55 LOG(WARNING) << "Database is currently unavailable, retrying..."; | |
56 boost::this_thread::sleep(boost::posix_time::seconds(1)); | |
57 continue; | |
58 } | |
59 else | |
60 { | |
61 LOG(ERROR) << "Timeout when connecting to the database, giving up"; | |
62 } | |
63 } | |
64 | |
65 throw; | |
66 } | |
67 } | |
68 | |
69 if (database_.get() == NULL || | |
70 database_->GetDialect() != dialect_) | |
71 { | |
72 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
73 } | |
74 else | |
75 { | |
76 return *database_; | |
77 } | |
78 } | |
79 | |
80 | |
81 void DatabaseManager::Close() | |
82 { | |
83 LOG(TRACE) << "Closing the connection to the database"; | |
84 | |
85 // Rollback active transaction, if any | |
86 transaction_.reset(NULL); | |
87 | |
88 // Delete all the cached statements (must occur before closing | |
89 // the database) | |
90 for (CachedStatements::iterator it = cachedStatements_.begin(); | |
91 it != cachedStatements_.end(); ++it) | |
92 { | |
93 assert(it->second != NULL); | |
94 delete it->second; | |
95 } | |
96 | |
97 cachedStatements_.clear(); | |
98 | |
99 // Close the database | |
100 database_.reset(NULL); | |
101 | |
102 LOG(TRACE) << "Connection to the database is closed"; | |
103 } | |
104 | |
105 | |
106 void DatabaseManager::CloseIfUnavailable(Orthanc::ErrorCode e) | |
107 { | |
108 if (e != Orthanc::ErrorCode_Success) | |
109 { | |
110 transaction_.reset(NULL); | |
111 } | |
112 | |
113 if (e == Orthanc::ErrorCode_DatabaseUnavailable) | |
114 { | |
115 LOG(ERROR) << "The database is not available, closing the connection"; | |
116 Close(); | |
117 } | |
118 } | |
119 | |
120 | |
121 IPrecompiledStatement* DatabaseManager::LookupCachedStatement(const StatementLocation& location) const | |
122 { | |
123 CachedStatements::const_iterator found = cachedStatements_.find(location); | |
124 | |
125 if (found == cachedStatements_.end()) | |
126 { | |
127 return NULL; | |
128 } | |
129 else | |
130 { | |
131 assert(found->second != NULL); | |
132 return found->second; | |
133 } | |
134 } | |
135 | |
136 | |
137 IPrecompiledStatement& DatabaseManager::CacheStatement(const StatementLocation& location, | |
138 const Query& query) | |
139 { | |
140 LOG(TRACE) << "Caching statement from " << location.GetFile() << ":" << location.GetLine(); | |
141 | |
142 std::auto_ptr<IPrecompiledStatement> statement(GetDatabase().Compile(query)); | |
143 | |
144 IPrecompiledStatement* tmp = statement.get(); | |
145 if (tmp == NULL) | |
146 { | |
147 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
148 } | |
149 | |
150 assert(cachedStatements_.find(location) == cachedStatements_.end()); | |
151 cachedStatements_[location] = statement.release(); | |
152 | |
153 return *tmp; | |
154 } | |
155 | |
156 | |
157 ITransaction& DatabaseManager::GetTransaction() | |
158 { | |
159 if (transaction_.get() == NULL) | |
160 { | |
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161 LOG(TRACE) << "Automatically creating an implicit database transaction"; |
0 | 162 |
163 try | |
164 { | |
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165 transaction_.reset(GetDatabase().CreateTransaction(true)); |
0 | 166 } |
167 catch (Orthanc::OrthancException& e) | |
168 { | |
169 CloseIfUnavailable(e.GetErrorCode()); | |
170 throw; | |
171 } | |
172 } | |
173 | |
174 assert(transaction_.get() != NULL); | |
175 return *transaction_; | |
176 } | |
177 | |
23
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178 |
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179 void DatabaseManager::ReleaseImplicitTransaction() |
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180 { |
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181 if (transaction_.get() != NULL && |
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182 transaction_->IsImplicit()) |
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183 { |
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184 LOG(TRACE) << "Committing an implicit database transaction"; |
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185 |
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186 try |
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187 { |
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188 transaction_->Commit(); |
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189 transaction_.reset(NULL); |
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190 } |
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191 catch (Orthanc::OrthancException& e) |
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192 { |
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193 // Don't throw the exception, as we are in CachedStatement destructor |
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194 LOG(ERROR) << "Error while committing an implicit database transaction: " << e.What(); |
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195 } |
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196 } |
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197 } |
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198 |
0 | 199 |
200 DatabaseManager::DatabaseManager(IDatabaseFactory* factory) : // Takes ownership | |
201 factory_(factory) | |
202 { | |
203 if (factory == NULL) | |
204 { | |
205 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); | |
206 } | |
207 | |
208 dialect_ = factory->GetDialect(); | |
209 } | |
210 | |
211 | |
212 void DatabaseManager::StartTransaction() | |
213 { | |
214 boost::recursive_mutex::scoped_lock lock(mutex_); | |
215 | |
216 try | |
217 { | |
218 if (transaction_.get() != NULL) | |
219 { | |
23
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220 LOG(ERROR) << "Cannot start another transaction while there is an uncommitted transaction"; |
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221 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); |
0 | 222 } |
223 | |
23
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224 transaction_.reset(GetDatabase().CreateTransaction(false)); |
0 | 225 } |
226 catch (Orthanc::OrthancException& e) | |
227 { | |
228 CloseIfUnavailable(e.GetErrorCode()); | |
229 throw; | |
230 } | |
231 } | |
232 | |
233 | |
234 void DatabaseManager::CommitTransaction() | |
235 { | |
236 boost::recursive_mutex::scoped_lock lock(mutex_); | |
237 | |
238 if (transaction_.get() == NULL) | |
239 { | |
240 LOG(ERROR) << "Cannot commit a non-existing transaction"; | |
241 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
242 } | |
243 else | |
244 { | |
245 try | |
246 { | |
247 transaction_->Commit(); | |
248 transaction_.reset(NULL); | |
249 } | |
250 catch (Orthanc::OrthancException& e) | |
251 { | |
252 CloseIfUnavailable(e.GetErrorCode()); | |
253 throw; | |
254 } | |
255 } | |
256 } | |
257 | |
258 | |
259 void DatabaseManager::RollbackTransaction() | |
260 { | |
261 boost::recursive_mutex::scoped_lock lock(mutex_); | |
262 | |
263 if (transaction_.get() == NULL) | |
264 { | |
265 LOG(ERROR) << "Cannot rollback a non-existing transaction"; | |
266 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
267 } | |
268 else | |
269 { | |
270 try | |
271 { | |
272 transaction_->Rollback(); | |
273 transaction_.reset(NULL); | |
274 } | |
275 catch (Orthanc::OrthancException& e) | |
276 { | |
277 CloseIfUnavailable(e.GetErrorCode()); | |
278 throw; | |
279 } | |
280 } | |
281 } | |
282 | |
283 | |
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284 DatabaseManager::Transaction::Transaction(DatabaseManager& manager) : |
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285 lock_(manager.mutex_), |
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286 manager_(manager), |
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287 database_(manager.GetDatabase()), |
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288 committed_(false) |
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289 { |
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290 manager_.StartTransaction(); |
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291 } |
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292 |
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293 |
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294 DatabaseManager::Transaction::~Transaction() |
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295 { |
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296 if (!committed_) |
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297 { |
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298 try |
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299 { |
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300 manager_.RollbackTransaction(); |
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301 } |
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302 catch (Orthanc::OrthancException& e) |
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303 { |
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304 // Don't rethrow the exception as we are in a destructor |
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305 LOG(ERROR) << "Uncatched error during some transaction rollback: " << e.What(); |
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306 } |
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307 } |
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308 } |
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309 |
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310 |
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311 void DatabaseManager::Transaction::Commit() |
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312 { |
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313 if (committed_) |
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314 { |
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315 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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316 } |
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317 else |
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318 { |
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319 manager_.CommitTransaction(); |
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320 committed_ = true; |
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321 } |
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322 } |
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323 |
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324 |
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325 IResult& DatabaseManager::StatementBase::GetResult() const |
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326 { |
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327 if (result_.get() == NULL) |
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328 { |
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329 LOG(ERROR) << "Accessing the results of a statement without having executed it"; |
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330 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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331 } |
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332 |
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333 return *result_; |
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334 } |
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335 |
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336 |
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337 void DatabaseManager::StatementBase::SetQuery(Query* query) |
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338 { |
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339 std::auto_ptr<Query> protection(query); |
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340 |
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341 if (query_.get() != NULL) |
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342 { |
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343 LOG(ERROR) << "Cannot set twice a query"; |
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344 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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345 } |
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346 |
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347 if (query == NULL) |
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348 { |
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349 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); |
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350 } |
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351 |
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352 query_.reset(protection.release()); |
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353 } |
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354 |
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355 |
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356 void DatabaseManager::StatementBase::SetResult(IResult* result) |
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357 { |
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358 std::auto_ptr<IResult> protection(result); |
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359 |
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360 if (result_.get() != NULL) |
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361 { |
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362 LOG(ERROR) << "Cannot execute twice a statement"; |
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363 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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364 } |
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365 |
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366 if (result == NULL) |
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367 { |
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368 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); |
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369 } |
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370 |
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371 result_.reset(protection.release()); |
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372 } |
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373 |
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374 |
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375 DatabaseManager::StatementBase::StatementBase(DatabaseManager& manager) : |
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376 manager_(manager), |
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377 lock_(manager_.mutex_), |
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378 transaction_(manager_.GetTransaction()) |
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379 { |
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380 } |
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381 |
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382 |
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383 DatabaseManager::StatementBase::~StatementBase() |
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384 { |
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385 manager_.ReleaseImplicitTransaction(); |
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386 } |
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387 |
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388 |
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389 void DatabaseManager::StatementBase::SetReadOnly(bool readOnly) |
0 | 390 { |
391 if (query_.get() != NULL) | |
392 { | |
393 query_->SetReadOnly(readOnly); | |
394 } | |
395 } | |
396 | |
397 | |
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398 void DatabaseManager::StatementBase::SetParameterType(const std::string& parameter, |
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399 ValueType type) |
0 | 400 { |
401 if (query_.get() != NULL) | |
402 { | |
403 query_->SetType(parameter, type); | |
404 } | |
405 } | |
406 | |
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407 bool DatabaseManager::StatementBase::IsDone() const |
0 | 408 { |
409 try | |
410 { | |
411 return GetResult().IsDone(); | |
412 } | |
413 catch (Orthanc::OrthancException& e) | |
414 { | |
415 manager_.CloseIfUnavailable(e.GetErrorCode()); | |
416 throw; | |
417 } | |
418 } | |
419 | |
420 | |
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421 void DatabaseManager::StatementBase::Next() |
0 | 422 { |
423 try | |
424 { | |
425 GetResult().Next(); | |
426 } | |
427 catch (Orthanc::OrthancException& e) | |
428 { | |
429 manager_.CloseIfUnavailable(e.GetErrorCode()); | |
430 throw; | |
431 } | |
432 } | |
433 | |
434 | |
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435 size_t DatabaseManager::StatementBase::GetResultFieldsCount() const |
0 | 436 { |
437 try | |
438 { | |
439 return GetResult().GetFieldsCount(); | |
440 } | |
441 catch (Orthanc::OrthancException& e) | |
442 { | |
443 manager_.CloseIfUnavailable(e.GetErrorCode()); | |
444 throw; | |
445 } | |
446 } | |
447 | |
448 | |
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449 void DatabaseManager::StatementBase::SetResultFieldType(size_t field, |
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450 ValueType type) |
0 | 451 { |
452 try | |
453 { | |
454 if (!GetResult().IsDone()) | |
455 { | |
456 GetResult().SetExpectedType(field, type); | |
457 } | |
458 } | |
459 catch (Orthanc::OrthancException& e) | |
460 { | |
461 manager_.CloseIfUnavailable(e.GetErrorCode()); | |
462 throw; | |
463 } | |
464 } | |
465 | |
466 | |
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467 const IValue& DatabaseManager::StatementBase::GetResultField(size_t index) const |
0 | 468 { |
469 try | |
470 { | |
471 return GetResult().GetField(index); | |
472 } | |
473 catch (Orthanc::OrthancException& e) | |
474 { | |
475 manager_.CloseIfUnavailable(e.GetErrorCode()); | |
476 throw; | |
477 } | |
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478 } |
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479 |
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480 |
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481 DatabaseManager::CachedStatement::CachedStatement(const StatementLocation& location, |
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482 DatabaseManager& manager, |
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483 const std::string& sql) : |
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484 StatementBase(manager), |
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485 location_(location) |
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486 { |
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487 statement_ = GetManager().LookupCachedStatement(location_); |
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488 |
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489 if (statement_ == NULL) |
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490 { |
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491 SetQuery(new Query(sql)); |
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492 } |
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493 else |
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494 { |
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495 LOG(TRACE) << "Reusing cached statement from " |
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496 << location_.GetFile() << ":" << location_.GetLine(); |
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497 } |
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498 } |
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499 |
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500 |
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501 void DatabaseManager::CachedStatement::Execute(const Dictionary& parameters) |
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502 { |
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503 try |
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504 { |
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505 std::auto_ptr<Query> query(ReleaseQuery()); |
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506 |
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507 if (query.get() != NULL) |
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508 { |
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509 // Register the newly-created statement |
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510 assert(statement_ == NULL); |
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511 statement_ = &GetManager().CacheStatement(location_, *query); |
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512 } |
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513 |
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514 assert(statement_ != NULL); |
116 | 515 |
516 /* | |
517 TODO - Sample code to monitor the execution time of each | |
518 cached statement, and publish it as an Orthanc metrics | |
519 | |
520 #if HAS_ORTHANC_PLUGIN_METRICS == 1 | |
521 std::string name = (std::string(location_.GetFile()) + "_" + | |
522 boost::lexical_cast<std::string>(location_.GetLine())); | |
523 OrthancPlugins::MetricsTimer timer(name.c_str()); | |
524 #endif | |
525 */ | |
526 | |
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527 SetResult(GetTransaction().Execute(*statement_, parameters)); |
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528 } |
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529 catch (Orthanc::OrthancException& e) |
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530 { |
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531 GetManager().CloseIfUnavailable(e.GetErrorCode()); |
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532 throw; |
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533 } |
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534 } |
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535 |
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536 |
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537 DatabaseManager::StandaloneStatement::StandaloneStatement(DatabaseManager& manager, |
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538 const std::string& sql) : |
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539 StatementBase(manager) |
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540 { |
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541 SetQuery(new Query(sql)); |
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542 } |
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543 |
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544 |
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545 DatabaseManager::StandaloneStatement::~StandaloneStatement() |
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546 { |
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547 // The result must be removed before the statement, cf. (*) |
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548 ClearResult(); |
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549 statement_.reset(); |
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550 } |
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551 |
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552 |
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553 void DatabaseManager::StandaloneStatement::Execute(const Dictionary& parameters) |
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554 { |
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555 try |
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556 { |
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557 std::auto_ptr<Query> query(ReleaseQuery()); |
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558 assert(query.get() != NULL); |
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559 |
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560 // The "statement_" object must be kept as long as the "IResult" |
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561 // is not destroyed, as the "IResult" can make calls to the |
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562 // statement (this is the case for SQLite and MySQL) - (*) |
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563 statement_.reset(GetManager().GetDatabase().Compile(*query)); |
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564 assert(statement_.get() != NULL); |
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565 |
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566 SetResult(GetTransaction().Execute(*statement_, parameters)); |
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567 } |
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568 catch (Orthanc::OrthancException& e) |
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569 { |
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570 GetManager().CloseIfUnavailable(e.GetErrorCode()); |
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571 throw; |
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572 } |
0 | 573 } |
574 } |