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annotate Framework/Common/DatabaseManager.h @ 221:73cc85f3d9c1

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implementation of the "serverIdentifier" information for global properties
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 30 Mar 2021 10:40:34 +0200
parents d9ef3f16e6a2
children a4918d57435c
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2021 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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21
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22 #pragma once
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24 #include "IDatabaseFactory.h"
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25 #include "StatementLocation.h"
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27 #include <Compatibility.h> // For std::unique_ptr<>
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28 #include <Enumerations.h>
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30 #include <boost/thread/recursive_mutex.hpp>
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31 #include <memory>
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34 namespace OrthancDatabases
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35 {
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36 class DatabaseManager : public boost::noncopyable
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37 {
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38 private:
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39 typedef std::map<StatementLocation, IPrecompiledStatement*> CachedStatements;
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41 boost::recursive_mutex mutex_;
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42 std::unique_ptr<IDatabaseFactory> factory_;
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43 std::unique_ptr<IDatabase> database_;
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44 std::unique_ptr<ITransaction> transaction_;
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45 CachedStatements cachedStatements_;
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46 Dialect dialect_;
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47
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48 IDatabase& GetDatabase();
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49
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50 void CloseIfUnavailable(Orthanc::ErrorCode e);
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51
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52 IPrecompiledStatement* LookupCachedStatement(const StatementLocation& location) const;
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54 IPrecompiledStatement& CacheStatement(const StatementLocation& location,
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55 const Query& query);
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56
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57 ITransaction& GetTransaction();
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59 void ReleaseImplicitTransaction();
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61 public:
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62 explicit DatabaseManager(IDatabaseFactory* factory); // Takes ownership
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64 ~DatabaseManager()
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65 {
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66 Close();
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67 }
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68
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69 Dialect GetDialect() const
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70 {
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71 return dialect_;
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72 }
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73
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74 void Open()
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75 {
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76 GetDatabase();
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77 }
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78
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79 void Close();
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80
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81 void StartTransaction(TransactionType type);
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83 void CommitTransaction();
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84
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85 void RollbackTransaction();
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86
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88 // This class is only used in the "StorageBackend"
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89 class Transaction : public boost::noncopyable
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90 {
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91 private:
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92 boost::recursive_mutex::scoped_lock lock_;
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93 DatabaseManager& manager_;
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94 IDatabase& database_;
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95 bool committed_;
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97 public:
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98 explicit Transaction(DatabaseManager& manager,
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99 TransactionType type);
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100
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101 ~Transaction();
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102
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103 void Commit();
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104
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105 DatabaseManager& GetManager()
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106 {
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107 return manager_;
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108 }
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109
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110 IDatabase& GetDatabase()
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111 {
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112 return database_;
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113 }
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114 };
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115
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116
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117 class StatementBase : public boost::noncopyable
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118 {
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119 private:
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120 DatabaseManager& manager_;
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121 boost::recursive_mutex::scoped_lock lock_;
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122 ITransaction& transaction_;
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123 std::unique_ptr<Query> query_;
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124 std::unique_ptr<IResult> result_;
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125
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126 IResult& GetResult() const;
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127
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128 protected:
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129 DatabaseManager& GetManager() const
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130 {
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131 return manager_;
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132 }
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134 ITransaction& GetTransaction() const
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135 {
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136 return transaction_;
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137 }
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138
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139 void SetQuery(Query* query);
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140
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141 void SetResult(IResult* result);
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142
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143 void ClearResult()
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144 {
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145 result_.reset();
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146 }
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148 Query* ReleaseQuery()
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149 {
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150 return query_.release();
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151 }
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152
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153 public:
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154 explicit StatementBase(DatabaseManager& manager);
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155
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156 virtual ~StatementBase();
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157
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158 // Used only by SQLite
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159 IDatabase& GetDatabase()
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160 {
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161 return manager_.GetDatabase();
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162 }
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163
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164 void SetReadOnly(bool readOnly);
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165
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166 void SetParameterType(const std::string& parameter,
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167 ValueType type);
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168
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169 bool IsDone() const;
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170
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171 void Next();
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172
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173 size_t GetResultFieldsCount() const;
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174
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175 void SetResultFieldType(size_t field,
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176 ValueType type);
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177
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178 const IValue& GetResultField(size_t index) const;
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179 };
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180
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181
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182 class CachedStatement : public StatementBase
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183 {
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184 private:
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185 StatementLocation location_;
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186 IPrecompiledStatement* statement_;
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187
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188 public:
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189 CachedStatement(const StatementLocation& location,
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190 DatabaseManager& manager,
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191 const std::string& sql);
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192
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193 void Execute()
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194 {
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195 Dictionary parameters;
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196 Execute(parameters);
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197 }
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198
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199 void Execute(const Dictionary& parameters);
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200 };
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201
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202
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203 class StandaloneStatement : public StatementBase
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204 {
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205 private:
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206 std::unique_ptr<IPrecompiledStatement> statement_;
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207
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208 public:
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209 StandaloneStatement(DatabaseManager& manager,
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210 const std::string& sql);
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211
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212 virtual ~StandaloneStatement();
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213
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214 void Execute()
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215 {
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216 Dictionary parameters;
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217 Execute(parameters);
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218 }
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219
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220 void Execute(const Dictionary& parameters);
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221 };
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222 };
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223 }