Mercurial > hg > orthanc-databases

annotate Framework/Common/DatabaseManager.h @ 96:a060f97a1f72 db-changes

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 21 Jan 2019 14:37:32 +0100
parents 52c70007bb87
children 4cd7e45b671e
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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) 2017-2019 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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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 <Core/Enumerations.h>
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29 #include <boost/thread/recursive_mutex.hpp>
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30 #include <memory>
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32 namespace OrthancDatabases
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33 {
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34 class DatabaseManager : public boost::noncopyable
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35 {
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36 private:
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37 typedef std::map<StatementLocation, IPrecompiledStatement*> CachedStatements;
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39 boost::recursive_mutex mutex_;
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40 std::auto_ptr<IDatabaseFactory> factory_;
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41 std::auto_ptr<IDatabase> database_;
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42 std::auto_ptr<ITransaction> transaction_;
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43 CachedStatements cachedStatements_;
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44 Dialect dialect_;
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46 IDatabase& GetDatabase();
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48 void CloseIfUnavailable(Orthanc::ErrorCode e);
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50 IPrecompiledStatement* LookupCachedStatement(const StatementLocation& location) const;
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52 IPrecompiledStatement& CacheStatement(const StatementLocation& location,
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53 const Query& query);
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55 ITransaction& GetTransaction();
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57 void ReleaseImplicitTransaction();
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59 public:
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60 explicit DatabaseManager(IDatabaseFactory* factory); // Takes ownership
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61
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62 ~DatabaseManager()
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63 {
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64 Close();
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65 }
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66
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67 Dialect GetDialect() const
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68 {
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69 return dialect_;
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70 }
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71
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72 void Open()
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73 {
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74 GetDatabase();
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75 }
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77 void Close();
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79 void StartTransaction();
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80
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81 void CommitTransaction();
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82
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83 void RollbackTransaction();
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84
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86 // This class is only used in the "StorageBackend"
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87 class Transaction : public boost::noncopyable
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88 {
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89 private:
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90 boost::recursive_mutex::scoped_lock lock_;
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91 DatabaseManager& manager_;
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92 IDatabase& database_;
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93 bool committed_;
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95 public:
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96 explicit Transaction(DatabaseManager& manager);
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98 ~Transaction();
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99
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100 void Commit();
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101
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102 DatabaseManager& GetManager()
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103 {
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104 return manager_;
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105 }
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106
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107 IDatabase& GetDatabase()
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108 {
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109 return database_;
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110 }
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111 };
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112
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113
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114 class StatementBase : public boost::noncopyable
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115 {
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116 private:
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117 DatabaseManager& manager_;
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118 boost::recursive_mutex::scoped_lock lock_;
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119 ITransaction& transaction_;
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120 std::auto_ptr<Query> query_;
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121 std::auto_ptr<IResult> result_;
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122
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123 IResult& GetResult() const;
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124
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125 protected:
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126 DatabaseManager& GetManager() const
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127 {
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128 return manager_;
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129 }
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130
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131 ITransaction& GetTransaction() const
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132 {
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133 return transaction_;
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134 }
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135
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136 void SetQuery(Query* query);
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137
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138 void SetResult(IResult* result);
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139
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140 void ClearResult()
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141 {
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142 result_.reset();
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143 }
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144
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145 Query* ReleaseQuery()
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146 {
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147 return query_.release();
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148 }
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150 public:
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151 explicit StatementBase(DatabaseManager& manager);
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152
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153 virtual ~StatementBase();
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154
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155 // Used only by SQLite
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156 IDatabase& GetDatabase()
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157 {
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158 return manager_.GetDatabase();
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159 }
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160
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161 void SetReadOnly(bool readOnly);
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162
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163 void SetParameterType(const std::string& parameter,
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164 ValueType type);
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165
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166 bool IsDone() const;
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167
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168 void Next();
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169
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170 size_t GetResultFieldsCount() const;
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171
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172 void SetResultFieldType(size_t field,
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173 ValueType type);
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174
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175 const IValue& GetResultField(size_t index) const;
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176 };
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177
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178
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179 class CachedStatement : public StatementBase
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180 {
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181 private:
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182 StatementLocation location_;
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183 IPrecompiledStatement* statement_;
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184
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185 public:
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186 CachedStatement(const StatementLocation& location,
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187 DatabaseManager& manager,
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188 const std::string& sql);
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189
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190 void Execute()
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191 {
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192 Dictionary parameters;
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193 Execute(parameters);
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194 }
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195
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196 void Execute(const Dictionary& parameters);
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197 };
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198
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199
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200 class StandaloneStatement : public StatementBase
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201 {
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202 private:
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203 std::auto_ptr<IPrecompiledStatement> statement_;
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204
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205 public:
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206 StandaloneStatement(DatabaseManager& manager,
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207 const std::string& sql);
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208
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209 virtual ~StandaloneStatement();
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210
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211 void Execute()
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212 {
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213 Dictionary parameters;
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214 Execute(parameters);
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215 }
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216
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217 void Execute(const Dictionary& parameters);
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218 };
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219 };
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220 }