Mercurial > hg > orthanc
annotate Core/SQLite/Connection.h @ 1831:3ae2ff249675
"/instances/.../header" to get the meta information (header) of the DICOM instance
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Thu, 26 Nov 2015 18:53:00 +0100 |
| parents | 4c5a85c3ff43 |
| children | b1291df2f780 |
| rev | line source |
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| 0 | 1 /** |
| 59 | 2 * Orthanc - A Lightweight, RESTful DICOM Store |
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3 * |
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4 * Copyright (C) 2012-2015 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 | |
| 38 #pragma once | |
| 39 | |
| 40 #include "Statement.h" | |
| 41 #include "IScalarFunction.h" | |
| 42 | |
| 43 #include <string> | |
| 44 #include <map> | |
| 45 | |
| 46 struct sqlite3; | |
| 47 struct sqlite3_stmt; | |
| 48 | |
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49 #define SQLITE_FROM_HERE ::Orthanc::SQLite::StatementId(__FILE__, __LINE__) |
| 0 | 50 |
| 59 | 51 namespace Orthanc |
| 0 | 52 { |
| 53 namespace SQLite | |
| 54 { | |
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55 class Connection : NonCopyable |
| 0 | 56 { |
| 57 friend class Statement; | |
| 58 friend class Transaction; | |
| 59 | |
| 60 private: | |
| 61 // All cached statements. Keeping a reference to these statements means that | |
| 62 // they'll remain active. | |
| 63 typedef std::map<StatementId, StatementReference*> CachedStatements; | |
| 64 CachedStatements cachedStatements_; | |
| 65 | |
| 66 // The actual sqlite database. Will be NULL before Init has been called or if | |
| 67 // Init resulted in an error. | |
| 68 sqlite3* db_; | |
| 69 | |
| 70 // Number of currently-nested transactions. | |
| 71 int transactionNesting_; | |
| 72 | |
| 73 // True if any of the currently nested transactions have been rolled back. | |
| 74 // When we get to the outermost transaction, this will determine if we do | |
| 75 // a rollback instead of a commit. | |
| 76 bool needsRollback_; | |
| 77 | |
| 78 void ClearCache(); | |
| 79 | |
| 80 void CheckIsOpen() const; | |
| 81 | |
| 82 sqlite3* GetWrappedObject() | |
| 83 { | |
| 84 return db_; | |
| 85 } | |
| 86 | |
| 87 StatementReference& GetCachedStatement(const StatementId& id, | |
| 88 const char* sql); | |
| 89 | |
| 90 bool DoesTableOrIndexExist(const char* name, | |
| 91 const char* type) const; | |
| 92 | |
| 93 void DoRollback(); | |
| 94 | |
| 95 public: | |
| 96 // The database is opened by calling Open[InMemory](). Any uncommitted | |
| 97 // transactions will be rolled back when this object is deleted. | |
| 98 Connection(); | |
| 99 ~Connection(); | |
| 100 | |
| 101 void Open(const std::string& path); | |
| 102 | |
| 103 void OpenInMemory(); | |
| 104 | |
| 105 void Close(); | |
| 106 | |
| 107 bool Execute(const char* sql); | |
| 108 | |
| 109 bool Execute(const std::string& sql) | |
| 110 { | |
| 111 return Execute(sql.c_str()); | |
| 112 } | |
| 113 | |
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114 void FlushToDisk(); |
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115 |
| 0 | 116 IScalarFunction* Register(IScalarFunction* func); // Takes the ownership of the function |
| 117 | |
| 118 // Info querying ------------------------------------------------------------- | |
| 119 | |
| 120 // Used to check a |sql| statement for syntactic validity. If the | |
| 121 // statement is valid SQL, returns true. | |
| 122 bool IsSQLValid(const char* sql); | |
| 123 | |
| 124 // Returns true if the given table exists. | |
| 125 bool DoesTableExist(const char* table_name) const; | |
| 126 | |
| 127 // Returns true if the given index exists. | |
| 128 bool DoesIndexExist(const char* index_name) const; | |
| 129 | |
| 130 // Returns true if a column with the given name exists in the given table. | |
| 131 bool DoesColumnExist(const char* table_name, const char* column_name) const; | |
| 132 | |
| 133 // Returns sqlite's internal ID for the last inserted row. Valid only | |
| 134 // immediately after an insert. | |
| 135 int64_t GetLastInsertRowId() const; | |
| 136 | |
| 137 // Returns sqlite's count of the number of rows modified by the last | |
| 138 // statement executed. Will be 0 if no statement has executed or the database | |
| 139 // is closed. | |
| 140 int GetLastChangeCount() const; | |
| 141 | |
| 142 // Errors -------------------------------------------------------------------- | |
| 143 | |
| 144 // Returns the error code associated with the last sqlite operation. | |
| 145 int GetErrorCode() const; | |
| 146 | |
| 147 // Returns the errno associated with GetErrorCode(). See | |
| 148 // SQLITE_LAST_ERRNO in SQLite documentation. | |
| 149 int GetLastErrno() const; | |
| 150 | |
| 151 // Returns a pointer to a statically allocated string associated with the | |
| 152 // last sqlite operation. | |
| 153 const char* GetErrorMessage() const; | |
| 154 | |
| 155 | |
| 156 // Diagnostics (for unit tests) ---------------------------------------------- | |
| 157 | |
| 158 int ExecuteAndReturnErrorCode(const char* sql); | |
| 159 | |
| 160 bool HasCachedStatement(const StatementId& id) const | |
| 161 { | |
| 162 return cachedStatements_.find(id) != cachedStatements_.end(); | |
| 163 } | |
| 164 | |
| 165 int GetTransactionNesting() const | |
| 166 { | |
| 167 return transactionNesting_; | |
| 168 } | |
| 169 | |
| 170 // Transactions -------------------------------------------------------------- | |
| 171 | |
| 172 bool BeginTransaction(); | |
| 173 void RollbackTransaction(); | |
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174 bool CommitTransaction(); |
| 0 | 175 }; |
| 176 } | |
| 177 } |