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annotate Core/Logging.h @ 2147:8466aa60544a

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 09 Nov 2016 17:37:47 +0100
parents 595cf22b3e7e
children 2dbfdafc2512
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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 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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33 #pragma once
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34
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35 #include <iostream>
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36
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37 #if !defined(ORTHANC_ENABLE_LOGGING)
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38 # error The macro ORTHANC_ENABLE_LOGGING must be defined
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39 #endif
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40
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41 namespace Orthanc
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42 {
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43 namespace Logging
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44 {
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45 void Initialize();
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46
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47 void Finalize();
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48
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49 void Reset();
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50
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51 void Flush();
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52
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53 void EnableInfoLevel(bool enabled);
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54
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55 void EnableTraceLevel(bool enabled);
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56
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57 void SetTargetFile(const std::string& path);
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58
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59 void SetTargetFolder(const std::string& path);
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60
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61 struct NullStream : public std::ostream
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62 {
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63 NullStream() :
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64 std::ios(0),
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65 std::ostream(0)
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66 {
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67 }
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68
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69 std::ostream& operator<< (const std::string& message)
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70 {
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71 return *this;
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72 }
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73
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74 // This overload fixes build problems with Visual Studio 2015
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75 std::ostream& operator<< (const char* message)
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76 {
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77 return *this;
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78 }
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79 };
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80 }
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81 }
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82
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83
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84 #if ORTHANC_ENABLE_LOGGING != 1
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85
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86 # define LOG(level) ::Orthanc::Logging::NullStream()
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87 # define VLOG(level) ::Orthanc::Logging::NullStream()
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88
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89 #else /* ORTHANC_ENABLE_LOGGING == 1 */
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90
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91 # include <boost/thread/mutex.hpp>
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92 # define LOG(level) ::Orthanc::Logging::InternalLogger(#level, __FILE__, __LINE__)
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93 # define VLOG(level) ::Orthanc::Logging::InternalLogger("TRACE", __FILE__, __LINE__)
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94
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95 namespace Orthanc
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96 {
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97 namespace Logging
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98 {
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99 class InternalLogger
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100 {
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101 private:
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102 boost::mutex::scoped_lock lock_;
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103 NullStream null_;
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104 std::ostream* stream_;
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105
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106 public:
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107 InternalLogger(const char* level,
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108 const char* file,
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109 int line);
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110
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111 ~InternalLogger();
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112
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113 std::ostream& operator<< (const std::string& message)
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114 {
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115 return (*stream_) << message;
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116 }
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117
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118 // This overload fixes build problems with Visual Studio 2015
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119 std::ostream& operator<< (const char* message)
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120 {
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121 return (*stream_) << message;
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122 }
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123 };
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124 }
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125 }
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126
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127 #endif // ORTHANC_ENABLE_LOGGING