Mercurial > hg > orthanc-databases
annotate Framework/Common/DatabaseManager.cpp @ 226:a4918d57435c
DatabaseManager doesn't IDatabaseFactory anymore
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 02 Apr 2021 19:23:36 +0200 |
parents | 90eb271f85b2 |
children | 0a9b48d19643 |
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 | |
193
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5 * Copyright (C) 2017-2021 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 |
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26 #include <Compatibility.h> // For std::unique_ptr<> |
152 | 27 #include <Logging.h> |
28 #include <OrthancException.h> | |
0 | 29 |
30 #include <boost/thread.hpp> | |
31 | |
32 namespace OrthancDatabases | |
33 { | |
34 void DatabaseManager::Close() | |
35 { | |
36 LOG(TRACE) << "Closing the connection to the database"; | |
37 | |
38 // Rollback active transaction, if any | |
39 transaction_.reset(NULL); | |
40 | |
41 // Delete all the cached statements (must occur before closing | |
42 // the database) | |
43 for (CachedStatements::iterator it = cachedStatements_.begin(); | |
44 it != cachedStatements_.end(); ++it) | |
45 { | |
46 assert(it->second != NULL); | |
47 delete it->second; | |
48 } | |
49 | |
50 cachedStatements_.clear(); | |
51 | |
52 // Close the database | |
53 database_.reset(NULL); | |
54 | |
55 LOG(TRACE) << "Connection to the database is closed"; | |
56 } | |
57 | |
58 | |
59 void DatabaseManager::CloseIfUnavailable(Orthanc::ErrorCode e) | |
60 { | |
61 if (e != Orthanc::ErrorCode_Success) | |
62 { | |
63 transaction_.reset(NULL); | |
64 } | |
65 | |
66 if (e == Orthanc::ErrorCode_DatabaseUnavailable) | |
67 { | |
68 LOG(ERROR) << "The database is not available, closing the connection"; | |
69 Close(); | |
70 } | |
71 } | |
72 | |
73 | |
74 IPrecompiledStatement* DatabaseManager::LookupCachedStatement(const StatementLocation& location) const | |
75 { | |
76 CachedStatements::const_iterator found = cachedStatements_.find(location); | |
77 | |
78 if (found == cachedStatements_.end()) | |
79 { | |
80 return NULL; | |
81 } | |
82 else | |
83 { | |
84 assert(found->second != NULL); | |
85 return found->second; | |
86 } | |
87 } | |
88 | |
89 | |
90 IPrecompiledStatement& DatabaseManager::CacheStatement(const StatementLocation& location, | |
91 const Query& query) | |
92 { | |
93 LOG(TRACE) << "Caching statement from " << location.GetFile() << ":" << location.GetLine(); | |
94 | |
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95 std::unique_ptr<IPrecompiledStatement> statement(GetDatabase().Compile(query)); |
0 | 96 |
97 IPrecompiledStatement* tmp = statement.get(); | |
98 if (tmp == NULL) | |
99 { | |
100 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
101 } | |
102 | |
103 assert(cachedStatements_.find(location) == cachedStatements_.end()); | |
104 cachedStatements_[location] = statement.release(); | |
105 | |
106 return *tmp; | |
107 } | |
108 | |
109 | |
110 ITransaction& DatabaseManager::GetTransaction() | |
111 { | |
112 if (transaction_.get() == NULL) | |
113 { | |
23
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114 LOG(TRACE) << "Automatically creating an implicit database transaction"; |
0 | 115 |
116 try | |
117 { | |
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118 transaction_.reset(GetDatabase().CreateTransaction(TransactionType_Implicit)); |
0 | 119 } |
120 catch (Orthanc::OrthancException& e) | |
121 { | |
122 CloseIfUnavailable(e.GetErrorCode()); | |
123 throw; | |
124 } | |
125 } | |
126 | |
127 assert(transaction_.get() != NULL); | |
128 return *transaction_; | |
129 } | |
130 | |
23
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131 |
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132 void DatabaseManager::ReleaseImplicitTransaction() |
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133 { |
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134 if (transaction_.get() != NULL && |
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135 transaction_->IsImplicit()) |
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136 { |
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137 LOG(TRACE) << "Committing an implicit database transaction"; |
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138 |
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139 try |
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140 { |
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141 transaction_->Commit(); |
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142 transaction_.reset(NULL); |
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143 } |
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144 catch (Orthanc::OrthancException& e) |
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145 { |
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146 // Don't throw the exception, as we are in CachedStatement destructor |
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147 LOG(ERROR) << "Error while committing an implicit database transaction: " << e.What(); |
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148 } |
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149 } |
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150 } |
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151 |
0 | 152 |
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153 DatabaseManager::DatabaseManager(IDatabase* database) : |
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154 database_(database) |
0 | 155 { |
226
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156 if (database == NULL) |
0 | 157 { |
158 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); | |
159 } | |
160 | |
226
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161 dialect_ = database->GetDialect(); |
0 | 162 } |
163 | |
164 | |
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165 void DatabaseManager::StartTransaction(TransactionType type) |
0 | 166 { |
167 boost::recursive_mutex::scoped_lock lock(mutex_); | |
168 | |
169 try | |
170 { | |
171 if (transaction_.get() != NULL) | |
172 { | |
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173 LOG(ERROR) << "Cannot start another transaction while there is an uncommitted transaction"; |
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174 throw Orthanc::OrthancException(Orthanc::ErrorCode_Database); |
0 | 175 } |
176 | |
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177 transaction_.reset(GetDatabase().CreateTransaction(type)); |
0 | 178 } |
179 catch (Orthanc::OrthancException& e) | |
180 { | |
181 CloseIfUnavailable(e.GetErrorCode()); | |
182 throw; | |
183 } | |
184 } | |
185 | |
186 | |
187 void DatabaseManager::CommitTransaction() | |
188 { | |
189 boost::recursive_mutex::scoped_lock lock(mutex_); | |
190 | |
191 if (transaction_.get() == NULL) | |
192 { | |
193 LOG(ERROR) << "Cannot commit a non-existing transaction"; | |
194 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
195 } | |
196 else | |
197 { | |
198 try | |
199 { | |
200 transaction_->Commit(); | |
201 transaction_.reset(NULL); | |
202 } | |
203 catch (Orthanc::OrthancException& e) | |
204 { | |
205 CloseIfUnavailable(e.GetErrorCode()); | |
206 throw; | |
207 } | |
208 } | |
209 } | |
210 | |
211 | |
212 void DatabaseManager::RollbackTransaction() | |
213 { | |
214 boost::recursive_mutex::scoped_lock lock(mutex_); | |
215 | |
216 if (transaction_.get() == NULL) | |
217 { | |
218 LOG(ERROR) << "Cannot rollback a non-existing transaction"; | |
219 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); | |
220 } | |
221 else | |
222 { | |
223 try | |
224 { | |
225 transaction_->Rollback(); | |
226 transaction_.reset(NULL); | |
227 } | |
228 catch (Orthanc::OrthancException& e) | |
229 { | |
230 CloseIfUnavailable(e.GetErrorCode()); | |
231 throw; | |
232 } | |
233 } | |
234 } | |
235 | |
236 | |
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237 DatabaseManager::Transaction::Transaction(DatabaseManager& manager, |
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238 TransactionType type) : |
23
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239 lock_(manager.mutex_), |
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240 manager_(manager), |
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241 database_(manager.GetDatabase()), |
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242 committed_(false) |
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243 { |
207
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244 manager_.StartTransaction(type); |
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245 } |
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246 |
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247 |
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248 DatabaseManager::Transaction::~Transaction() |
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249 { |
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250 if (!committed_) |
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251 { |
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252 try |
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253 { |
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254 manager_.RollbackTransaction(); |
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255 } |
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256 catch (Orthanc::OrthancException& e) |
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257 { |
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258 // Don't rethrow the exception as we are in a destructor |
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259 LOG(ERROR) << "Uncatched error during some transaction rollback: " << e.What(); |
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260 } |
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261 } |
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262 } |
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263 |
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264 |
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265 void DatabaseManager::Transaction::Commit() |
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266 { |
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267 if (committed_) |
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268 { |
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269 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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270 } |
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271 else |
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272 { |
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273 manager_.CommitTransaction(); |
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274 committed_ = true; |
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275 } |
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276 } |
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277 |
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278 |
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279 IResult& DatabaseManager::StatementBase::GetResult() const |
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280 { |
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281 if (result_.get() == NULL) |
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282 { |
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283 LOG(ERROR) << "Accessing the results of a statement without having executed it"; |
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284 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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285 } |
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286 |
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287 return *result_; |
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288 } |
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289 |
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290 |
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291 void DatabaseManager::StatementBase::SetQuery(Query* query) |
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292 { |
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293 std::unique_ptr<Query> protection(query); |
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294 |
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295 if (query_.get() != NULL) |
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296 { |
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297 LOG(ERROR) << "Cannot set twice a query"; |
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298 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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299 } |
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300 |
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301 if (query == NULL) |
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302 { |
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303 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); |
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304 } |
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305 |
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306 query_.reset(protection.release()); |
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307 } |
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308 |
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309 |
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310 void DatabaseManager::StatementBase::SetResult(IResult* result) |
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311 { |
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312 std::unique_ptr<IResult> protection(result); |
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313 |
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314 if (result_.get() != NULL) |
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315 { |
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316 LOG(ERROR) << "Cannot execute twice a statement"; |
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317 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls); |
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318 } |
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319 |
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320 if (result == NULL) |
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321 { |
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322 throw Orthanc::OrthancException(Orthanc::ErrorCode_NullPointer); |
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323 } |
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324 |
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325 result_.reset(protection.release()); |
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326 } |
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327 |
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328 |
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329 DatabaseManager::StatementBase::StatementBase(DatabaseManager& manager) : |
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330 manager_(manager), |
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331 lock_(manager_.mutex_), |
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332 transaction_(manager_.GetTransaction()) |
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333 { |
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334 } |
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335 |
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336 |
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337 DatabaseManager::StatementBase::~StatementBase() |
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338 { |
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339 manager_.ReleaseImplicitTransaction(); |
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340 } |
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341 |
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342 |
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343 void DatabaseManager::StatementBase::SetReadOnly(bool readOnly) |
0 | 344 { |
345 if (query_.get() != NULL) | |
346 { | |
347 query_->SetReadOnly(readOnly); | |
348 } | |
349 } | |
350 | |
351 | |
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352 void DatabaseManager::StatementBase::SetParameterType(const std::string& parameter, |
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353 ValueType type) |
0 | 354 { |
355 if (query_.get() != NULL) | |
356 { | |
357 query_->SetType(parameter, type); | |
358 } | |
359 } | |
360 | |
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361 bool DatabaseManager::StatementBase::IsDone() const |
0 | 362 { |
363 try | |
364 { | |
365 return GetResult().IsDone(); | |
366 } | |
367 catch (Orthanc::OrthancException& e) | |
368 { | |
369 manager_.CloseIfUnavailable(e.GetErrorCode()); | |
370 throw; | |
371 } | |
372 } | |
373 | |
374 | |
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375 void DatabaseManager::StatementBase::Next() |
0 | 376 { |
377 try | |
378 { | |
379 GetResult().Next(); | |
380 } | |
381 catch (Orthanc::OrthancException& e) | |
382 { | |
383 manager_.CloseIfUnavailable(e.GetErrorCode()); | |
384 throw; | |
385 } | |
386 } | |
387 | |
388 | |
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389 size_t DatabaseManager::StatementBase::GetResultFieldsCount() const |
0 | 390 { |
391 try | |
392 { | |
393 return GetResult().GetFieldsCount(); | |
394 } | |
395 catch (Orthanc::OrthancException& e) | |
396 { | |
397 manager_.CloseIfUnavailable(e.GetErrorCode()); | |
398 throw; | |
399 } | |
400 } | |
401 | |
402 | |
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403 void DatabaseManager::StatementBase::SetResultFieldType(size_t field, |
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404 ValueType type) |
0 | 405 { |
406 try | |
407 { | |
408 if (!GetResult().IsDone()) | |
409 { | |
410 GetResult().SetExpectedType(field, type); | |
411 } | |
412 } | |
413 catch (Orthanc::OrthancException& e) | |
414 { | |
415 manager_.CloseIfUnavailable(e.GetErrorCode()); | |
416 throw; | |
417 } | |
418 } | |
419 | |
420 | |
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421 const IValue& DatabaseManager::StatementBase::GetResultField(size_t index) const |
0 | 422 { |
423 try | |
424 { | |
425 return GetResult().GetField(index); | |
426 } | |
427 catch (Orthanc::OrthancException& e) | |
428 { | |
429 manager_.CloseIfUnavailable(e.GetErrorCode()); | |
430 throw; | |
431 } | |
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432 } |
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433 |
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434 |
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435 DatabaseManager::CachedStatement::CachedStatement(const StatementLocation& location, |
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436 DatabaseManager& manager, |
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437 const std::string& sql) : |
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438 StatementBase(manager), |
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439 location_(location) |
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440 { |
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441 statement_ = GetManager().LookupCachedStatement(location_); |
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442 |
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443 if (statement_ == NULL) |
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444 { |
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445 SetQuery(new Query(sql)); |
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446 } |
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447 else |
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448 { |
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449 LOG(TRACE) << "Reusing cached statement from " |
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450 << location_.GetFile() << ":" << location_.GetLine(); |
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451 } |
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452 } |
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453 |
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454 |
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455 void DatabaseManager::CachedStatement::Execute(const Dictionary& parameters) |
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456 { |
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457 try |
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458 { |
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459 std::unique_ptr<Query> query(ReleaseQuery()); |
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460 |
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461 if (query.get() != NULL) |
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462 { |
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463 // Register the newly-created statement |
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464 assert(statement_ == NULL); |
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465 statement_ = &GetManager().CacheStatement(location_, *query); |
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466 } |
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467 |
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468 assert(statement_ != NULL); |
116 | 469 |
470 /* | |
471 TODO - Sample code to monitor the execution time of each | |
472 cached statement, and publish it as an Orthanc metrics | |
473 | |
474 #if HAS_ORTHANC_PLUGIN_METRICS == 1 | |
475 std::string name = (std::string(location_.GetFile()) + "_" + | |
476 boost::lexical_cast<std::string>(location_.GetLine())); | |
477 OrthancPlugins::MetricsTimer timer(name.c_str()); | |
478 #endif | |
479 */ | |
480 | |
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481 SetResult(GetTransaction().Execute(*statement_, parameters)); |
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482 } |
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483 catch (Orthanc::OrthancException& e) |
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484 { |
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485 GetManager().CloseIfUnavailable(e.GetErrorCode()); |
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486 throw; |
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487 } |
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488 } |
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489 |
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490 |
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491 DatabaseManager::StandaloneStatement::StandaloneStatement(DatabaseManager& manager, |
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492 const std::string& sql) : |
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493 StatementBase(manager) |
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494 { |
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495 SetQuery(new Query(sql)); |
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496 } |
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497 |
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498 |
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499 DatabaseManager::StandaloneStatement::~StandaloneStatement() |
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500 { |
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501 // The result must be removed before the statement, cf. (*) |
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502 ClearResult(); |
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503 statement_.reset(); |
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504 } |
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505 |
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506 |
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507 void DatabaseManager::StandaloneStatement::Execute(const Dictionary& parameters) |
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508 { |
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509 try |
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510 { |
157
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511 std::unique_ptr<Query> query(ReleaseQuery()); |
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512 assert(query.get() != NULL); |
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513 |
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514 // The "statement_" object must be kept as long as the "IResult" |
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515 // is not destroyed, as the "IResult" can make calls to the |
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516 // statement (this is the case for SQLite and MySQL) - (*) |
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517 statement_.reset(GetManager().GetDatabase().Compile(*query)); |
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518 assert(statement_.get() != NULL); |
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519 |
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520 SetResult(GetTransaction().Execute(*statement_, parameters)); |
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521 } |
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522 catch (Orthanc::OrthancException& e) |
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523 { |
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524 GetManager().CloseIfUnavailable(e.GetErrorCode()); |
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525 throw; |
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526 } |
0 | 527 } |
528 } |