Mercurial > hg > orthanc-databases
annotate Framework/Common/DatabaseManager.cpp @ 152:063aa53b5917
sync
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Wed, 01 Jul 2020 08:54:32 +0200 |
parents | 0b3e9ee53c46 |
children | 275e14f57f1e |
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 | |
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5 * Copyright (C) 2017-2020 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 | |
152 | 24 #include "../../Resources/Orthanc/Plugins/OrthancPluginCppWrapper.h" |
116 | 25 |
152 | 26 #include <Logging.h> |
27 #include <OrthancException.h> | |
0 | 28 |
29 #include <boost/thread.hpp> | |
30 | |
31 namespace OrthancDatabases | |
32 { | |
33 IDatabase& DatabaseManager::GetDatabase() | |
34 { | |
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35 unsigned int maxConnectionRetries = 10; |
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36 unsigned int connectionRetryInterval = 5; |
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37 unsigned int count = 0; |
0 | 38 |
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39 factory_->GetConnectionRetriesParameters(maxConnectionRetries, connectionRetryInterval); |
0 | 40 |
41 while (database_.get() == NULL) | |
42 { | |
43 transaction_.reset(NULL); | |
44 | |
45 try | |
46 { | |
47 database_.reset(factory_->Open()); | |
48 } | |
49 catch (Orthanc::OrthancException& e) | |
50 { | |
51 if (e.GetErrorCode() == Orthanc::ErrorCode_DatabaseUnavailable) | |
52 { | |
53 count ++; | |
54 | |
141
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55 if (count <= maxConnectionRetries) |
0 | 56 { |
57 LOG(WARNING) << "Database is currently unavailable, retrying..."; | |
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58 boost::this_thread::sleep(boost::posix_time::seconds(connectionRetryInterval)); |
0 | 59 continue; |
60 } | |
61 else | |
62 { | |
63 LOG(ERROR) << "Timeout when connecting to the database, giving up"; | |
64 } | |
65 } | |
66 | |
67 throw; | |
68 } | |
69 } | |
70 | |
71 if (database_.get() == NULL || | |
72 database_->GetDialect() != dialect_) | |
73 { | |
74 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
75 } | |
76 else | |
77 { | |
78 return *database_; | |
79 } | |
80 } | |
81 | |
82 | |
83 void DatabaseManager::Close() | |
84 { | |
85 LOG(TRACE) << "Closing the connection to the database"; | |
86 | |
87 // Rollback active transaction, if any | |
88 transaction_.reset(NULL); | |
89 | |
90 // Delete all the cached statements (must occur before closing | |
91 // the database) | |
92 for (CachedStatements::iterator it = cachedStatements_.begin(); | |
93 it != cachedStatements_.end(); ++it) | |
94 { | |
95 assert(it->second != NULL); | |
96 delete it->second; | |
97 } | |
98 | |
99 cachedStatements_.clear(); | |
100 | |
101 // Close the database | |
102 database_.reset(NULL); | |
103 | |
104 LOG(TRACE) << "Connection to the database is closed"; | |
105 } | |
106 | |
107 | |
108 void DatabaseManager::CloseIfUnavailable(Orthanc::ErrorCode e) | |
109 { | |
110 if (e != Orthanc::ErrorCode_Success) | |
111 { | |
112 transaction_.reset(NULL); | |
113 } | |
114 | |
115 if (e == Orthanc::ErrorCode_DatabaseUnavailable) | |
116 { | |
117 LOG(ERROR) << "The database is not available, closing the connection"; | |
118 Close(); | |
119 } | |
120 } | |
121 | |
122 | |
123 IPrecompiledStatement* DatabaseManager::LookupCachedStatement(const StatementLocation& location) const | |
124 { | |
125 CachedStatements::const_iterator found = cachedStatements_.find(location); | |
126 | |
127 if (found == cachedStatements_.end()) | |
128 { | |
129 return NULL; | |
130 } | |
131 else | |
132 { | |
133 assert(found->second != NULL); | |
134 return found->second; | |
135 } | |
136 } | |
137 | |
138 | |
139 IPrecompiledStatement& DatabaseManager::CacheStatement(const StatementLocation& location, | |
140 const Query& query) | |
141 { | |
142 LOG(TRACE) << "Caching statement from " << location.GetFile() << ":" << location.GetLine(); | |
143 | |
144 std::auto_ptr<IPrecompiledStatement> statement(GetDatabase().Compile(query)); | |
145 | |
146 IPrecompiledStatement* tmp = statement.get(); | |
147 if (tmp == NULL) | |
148 { | |
149 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
150 } | |
151 | |
152 assert(cachedStatements_.find(location) == cachedStatements_.end()); | |
153 cachedStatements_[location] = statement.release(); | |
154 | |
155 return *tmp; | |
156 } | |
157 | |
158 | |
159 ITransaction& DatabaseManager::GetTransaction() | |
160 { | |
161 if (transaction_.get() == NULL) | |
162 { | |
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163 LOG(TRACE) << "Automatically creating an implicit database transaction"; |
0 | 164 |
165 try | |
166 { | |
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167 transaction_.reset(GetDatabase().CreateTransaction(true)); |
0 | 168 } |
169 catch (Orthanc::OrthancException& e) | |
170 { | |
171 CloseIfUnavailable(e.GetErrorCode()); | |
172 throw; | |
173 } | |
174 } | |
175 | |
176 assert(transaction_.get() != NULL); | |
177 return *transaction_; | |
178 } | |
179 | |
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180 |
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181 void DatabaseManager::ReleaseImplicitTransaction() |
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182 { |
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183 if (transaction_.get() != NULL && |
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184 transaction_->IsImplicit()) |
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185 { |
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186 LOG(TRACE) << "Committing an implicit database transaction"; |
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187 |
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188 try |
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189 { |
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190 transaction_->Commit(); |
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191 transaction_.reset(NULL); |
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192 } |
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193 catch (Orthanc::OrthancException& e) |
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194 { |
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195 // Don't throw the exception, as we are in CachedStatement destructor |
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196 LOG(ERROR) << "Error while committing an implicit database transaction: " << e.What(); |
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197 } |
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198 } |
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199 } |
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200 |
0 | 201 |
202 DatabaseManager::DatabaseManager(IDatabaseFactory* factory) : // Takes ownership | |
203 factory_(factory) | |
204 { | |
205 if (factory == NULL) | |
206 { | |
207 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); | |
208 } | |
209 | |
210 dialect_ = factory->GetDialect(); | |
211 } | |
212 | |
213 | |
214 void DatabaseManager::StartTransaction() | |
215 { | |
216 boost::recursive_mutex::scoped_lock lock(mutex_); | |
217 | |
218 try | |
219 { | |
220 if (transaction_.get() != NULL) | |
221 { | |
23
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222 LOG(ERROR) << "Cannot start another transaction while there is an uncommitted transaction"; |
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223 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); |
0 | 224 } |
225 | |
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226 transaction_.reset(GetDatabase().CreateTransaction(false)); |
0 | 227 } |
228 catch (Orthanc::OrthancException& e) | |
229 { | |
230 CloseIfUnavailable(e.GetErrorCode()); | |
231 throw; | |
232 } | |
233 } | |
234 | |
235 | |
236 void DatabaseManager::CommitTransaction() | |
237 { | |
238 boost::recursive_mutex::scoped_lock lock(mutex_); | |
239 | |
240 if (transaction_.get() == NULL) | |
241 { | |
242 LOG(ERROR) << "Cannot commit a non-existing transaction"; | |
243 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
244 } | |
245 else | |
246 { | |
247 try | |
248 { | |
249 transaction_->Commit(); | |
250 transaction_.reset(NULL); | |
251 } | |
252 catch (Orthanc::OrthancException& e) | |
253 { | |
254 CloseIfUnavailable(e.GetErrorCode()); | |
255 throw; | |
256 } | |
257 } | |
258 } | |
259 | |
260 | |
261 void DatabaseManager::RollbackTransaction() | |
262 { | |
263 boost::recursive_mutex::scoped_lock lock(mutex_); | |
264 | |
265 if (transaction_.get() == NULL) | |
266 { | |
267 LOG(ERROR) << "Cannot rollback a non-existing transaction"; | |
268 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
269 } | |
270 else | |
271 { | |
272 try | |
273 { | |
274 transaction_->Rollback(); | |
275 transaction_.reset(NULL); | |
276 } | |
277 catch (Orthanc::OrthancException& e) | |
278 { | |
279 CloseIfUnavailable(e.GetErrorCode()); | |
280 throw; | |
281 } | |
282 } | |
283 } | |
284 | |
285 | |
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286 DatabaseManager::Transaction::Transaction(DatabaseManager& manager) : |
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287 lock_(manager.mutex_), |
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288 manager_(manager), |
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289 database_(manager.GetDatabase()), |
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290 committed_(false) |
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291 { |
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292 manager_.StartTransaction(); |
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293 } |
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294 |
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295 |
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296 DatabaseManager::Transaction::~Transaction() |
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297 { |
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298 if (!committed_) |
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299 { |
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300 try |
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301 { |
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302 manager_.RollbackTransaction(); |
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303 } |
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304 catch (Orthanc::OrthancException& e) |
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305 { |
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306 // Don't rethrow the exception as we are in a destructor |
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307 LOG(ERROR) << "Uncatched error during some transaction rollback: " << e.What(); |
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308 } |
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309 } |
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310 } |
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311 |
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312 |
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313 void DatabaseManager::Transaction::Commit() |
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314 { |
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315 if (committed_) |
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316 { |
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317 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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318 } |
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319 else |
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320 { |
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321 manager_.CommitTransaction(); |
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322 committed_ = true; |
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323 } |
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324 } |
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325 |
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326 |
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327 IResult& DatabaseManager::StatementBase::GetResult() const |
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328 { |
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329 if (result_.get() == NULL) |
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330 { |
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331 LOG(ERROR) << "Accessing the results of a statement without having executed it"; |
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332 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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333 } |
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334 |
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335 return *result_; |
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336 } |
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337 |
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338 |
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339 void DatabaseManager::StatementBase::SetQuery(Query* query) |
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340 { |
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341 std::auto_ptr<Query> protection(query); |
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342 |
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343 if (query_.get() != NULL) |
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344 { |
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345 LOG(ERROR) << "Cannot set twice a query"; |
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346 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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347 } |
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348 |
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349 if (query == NULL) |
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350 { |
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351 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); |
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352 } |
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353 |
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354 query_.reset(protection.release()); |
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355 } |
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356 |
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357 |
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358 void DatabaseManager::StatementBase::SetResult(IResult* result) |
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359 { |
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360 std::auto_ptr<IResult> protection(result); |
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361 |
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362 if (result_.get() != NULL) |
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363 { |
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364 LOG(ERROR) << "Cannot execute twice a statement"; |
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365 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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366 } |
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367 |
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368 if (result == NULL) |
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369 { |
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370 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); |
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371 } |
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372 |
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373 result_.reset(protection.release()); |
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374 } |
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375 |
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376 |
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377 DatabaseManager::StatementBase::StatementBase(DatabaseManager& manager) : |
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378 manager_(manager), |
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379 lock_(manager_.mutex_), |
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380 transaction_(manager_.GetTransaction()) |
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381 { |
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382 } |
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383 |
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384 |
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385 DatabaseManager::StatementBase::~StatementBase() |
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386 { |
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387 manager_.ReleaseImplicitTransaction(); |
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388 } |
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389 |
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390 |
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391 void DatabaseManager::StatementBase::SetReadOnly(bool readOnly) |
0 | 392 { |
393 if (query_.get() != NULL) | |
394 { | |
395 query_->SetReadOnly(readOnly); | |
396 } | |
397 } | |
398 | |
399 | |
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400 void DatabaseManager::StatementBase::SetParameterType(const std::string& parameter, |
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401 ValueType type) |
0 | 402 { |
403 if (query_.get() != NULL) | |
404 { | |
405 query_->SetType(parameter, type); | |
406 } | |
407 } | |
408 | |
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409 bool DatabaseManager::StatementBase::IsDone() const |
0 | 410 { |
411 try | |
412 { | |
413 return GetResult().IsDone(); | |
414 } | |
415 catch (Orthanc::OrthancException& e) | |
416 { | |
417 manager_.CloseIfUnavailable(e.GetErrorCode()); | |
418 throw; | |
419 } | |
420 } | |
421 | |
422 | |
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423 void DatabaseManager::StatementBase::Next() |
0 | 424 { |
425 try | |
426 { | |
427 GetResult().Next(); | |
428 } | |
429 catch (Orthanc::OrthancException& e) | |
430 { | |
431 manager_.CloseIfUnavailable(e.GetErrorCode()); | |
432 throw; | |
433 } | |
434 } | |
435 | |
436 | |
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437 size_t DatabaseManager::StatementBase::GetResultFieldsCount() const |
0 | 438 { |
439 try | |
440 { | |
441 return GetResult().GetFieldsCount(); | |
442 } | |
443 catch (Orthanc::OrthancException& e) | |
444 { | |
445 manager_.CloseIfUnavailable(e.GetErrorCode()); | |
446 throw; | |
447 } | |
448 } | |
449 | |
450 | |
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451 void DatabaseManager::StatementBase::SetResultFieldType(size_t field, |
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452 ValueType type) |
0 | 453 { |
454 try | |
455 { | |
456 if (!GetResult().IsDone()) | |
457 { | |
458 GetResult().SetExpectedType(field, type); | |
459 } | |
460 } | |
461 catch (Orthanc::OrthancException& e) | |
462 { | |
463 manager_.CloseIfUnavailable(e.GetErrorCode()); | |
464 throw; | |
465 } | |
466 } | |
467 | |
468 | |
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469 const IValue& DatabaseManager::StatementBase::GetResultField(size_t index) const |
0 | 470 { |
471 try | |
472 { | |
473 return GetResult().GetField(index); | |
474 } | |
475 catch (Orthanc::OrthancException& e) | |
476 { | |
477 manager_.CloseIfUnavailable(e.GetErrorCode()); | |
478 throw; | |
479 } | |
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480 } |
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481 |
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482 |
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483 DatabaseManager::CachedStatement::CachedStatement(const StatementLocation& location, |
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484 DatabaseManager& manager, |
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485 const std::string& sql) : |
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486 StatementBase(manager), |
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487 location_(location) |
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488 { |
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489 statement_ = GetManager().LookupCachedStatement(location_); |
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490 |
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491 if (statement_ == NULL) |
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492 { |
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493 SetQuery(new Query(sql)); |
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494 } |
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495 else |
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496 { |
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497 LOG(TRACE) << "Reusing cached statement from " |
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498 << location_.GetFile() << ":" << location_.GetLine(); |
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499 } |
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500 } |
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501 |
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502 |
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503 void DatabaseManager::CachedStatement::Execute(const Dictionary& parameters) |
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504 { |
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505 try |
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506 { |
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507 std::auto_ptr<Query> query(ReleaseQuery()); |
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508 |
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509 if (query.get() != NULL) |
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510 { |
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511 // Register the newly-created statement |
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512 assert(statement_ == NULL); |
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513 statement_ = &GetManager().CacheStatement(location_, *query); |
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514 } |
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515 |
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516 assert(statement_ != NULL); |
116 | 517 |
518 /* | |
519 TODO - Sample code to monitor the execution time of each | |
520 cached statement, and publish it as an Orthanc metrics | |
521 | |
522 #if HAS_ORTHANC_PLUGIN_METRICS == 1 | |
523 std::string name = (std::string(location_.GetFile()) + "_" + | |
524 boost::lexical_cast<std::string>(location_.GetLine())); | |
525 OrthancPlugins::MetricsTimer timer(name.c_str()); | |
526 #endif | |
527 */ | |
528 | |
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529 SetResult(GetTransaction().Execute(*statement_, parameters)); |
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530 } |
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531 catch (Orthanc::OrthancException& e) |
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532 { |
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533 GetManager().CloseIfUnavailable(e.GetErrorCode()); |
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534 throw; |
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535 } |
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536 } |
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537 |
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538 |
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539 DatabaseManager::StandaloneStatement::StandaloneStatement(DatabaseManager& manager, |
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540 const std::string& sql) : |
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541 StatementBase(manager) |
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542 { |
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543 SetQuery(new Query(sql)); |
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544 } |
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545 |
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546 |
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547 DatabaseManager::StandaloneStatement::~StandaloneStatement() |
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548 { |
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549 // The result must be removed before the statement, cf. (*) |
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550 ClearResult(); |
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551 statement_.reset(); |
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552 } |
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553 |
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554 |
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555 void DatabaseManager::StandaloneStatement::Execute(const Dictionary& parameters) |
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556 { |
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557 try |
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558 { |
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559 std::auto_ptr<Query> query(ReleaseQuery()); |
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560 assert(query.get() != NULL); |
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561 |
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562 // The "statement_" object must be kept as long as the "IResult" |
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563 // is not destroyed, as the "IResult" can make calls to the |
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564 // statement (this is the case for SQLite and MySQL) - (*) |
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565 statement_.reset(GetManager().GetDatabase().Compile(*query)); |
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566 assert(statement_.get() != NULL); |
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567 |
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568 SetResult(GetTransaction().Execute(*statement_, parameters)); |
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569 } |
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570 catch (Orthanc::OrthancException& e) |
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571 { |
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572 GetManager().CloseIfUnavailable(e.GetErrorCode()); |
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573 throw; |
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574 } |
0 | 575 } |
576 } |