Mercurial > hg > orthanc
annotate Resources/Samples/CppHelpers/Logging/ILogger.h @ 3466:b61e74e68d41
fix ILogger in non threaded environment (Emscripten)
| author | Alain Mazy <alain@mazy.be> |
|---|---|
| date | Thu, 11 Jul 2019 10:23:15 +0200 |
| parents | fbe22748cd9c |
| children | 324f6b966c7a |
| rev | line source |
|---|---|
| 3460 | 1 #pragma once |
| 2 | |
| 3 #include <string> | |
| 4 #include <vector> | |
| 5 #include <boost/algorithm/string.hpp> | |
| 6 #include <boost/thread.hpp> | |
| 7 | |
| 8 namespace OrthancHelpers | |
| 9 { | |
| 10 | |
| 11 // Interface for loggers providing the same interface | |
| 12 // in Orthanc framework or in an Orthanc plugins. | |
| 13 // Furthermore, compared to the LOG and VLOG macros, | |
| 14 // these loggers will provide "contexts". | |
| 15 class ILogger | |
| 16 { | |
| 17 public: | |
| 18 virtual ~ILogger() {} | |
| 19 virtual void Trace(const char* message) = 0; | |
| 20 virtual void Trace(const std::string& message) = 0; | |
| 21 virtual void Info(const char* message) = 0; | |
| 22 virtual void Info(const std::string& message) = 0; | |
| 23 virtual void Warning(const char* message) = 0; | |
| 24 virtual void Warning(const std::string& message) = 0; | |
| 25 virtual void Error(const char* message) = 0; | |
| 26 virtual void Error(const std::string& message) = 0; | |
| 27 | |
| 28 virtual void EnterContext(const char* message) = 0; | |
| 29 virtual void EnterContext(const std::string& message) = 0; | |
| 30 virtual void LeaveContext() = 0; | |
| 31 }; | |
| 32 | |
| 33 | |
| 34 // Implements ILogger by providing contexts. Contexts defines | |
| 35 // the "call-stack" of the logs and are prepended to the log. | |
| 36 // check LogContext class for more details | |
| 37 class BaseLogger : public ILogger | |
| 38 { | |
|
3466
b61e74e68d41
fix ILogger in non threaded environment (Emscripten)
Alain Mazy <alain@mazy.be>
parents:
3460
diff
changeset
|
39 #if defined(BOOST_ENABLE_THREADS) |
| 3460 | 40 boost::thread_specific_ptr<std::vector<std::string>> contexts_; |
|
3466
b61e74e68d41
fix ILogger in non threaded environment (Emscripten)
Alain Mazy <alain@mazy.be>
parents:
3460
diff
changeset
|
41 #else |
|
b61e74e68d41
fix ILogger in non threaded environment (Emscripten)
Alain Mazy <alain@mazy.be>
parents:
3460
diff
changeset
|
42 boost::thread_specific_ptr<std::vector<std::string>> contexts_; |
|
b61e74e68d41
fix ILogger in non threaded environment (Emscripten)
Alain Mazy <alain@mazy.be>
parents:
3460
diff
changeset
|
43 #endif |
| 3460 | 44 bool logContextChanges_; |
| 45 | |
| 46 public: | |
| 47 | |
| 48 BaseLogger() | |
| 49 : logContextChanges_(false) | |
| 50 { | |
| 51 } | |
| 52 | |
| 53 void EnableLogContextChanges(bool enable) | |
| 54 { | |
| 55 logContextChanges_ = enable; | |
| 56 } | |
| 57 | |
| 58 virtual void EnterContext(const char* message) | |
| 59 { | |
| 60 EnterContext(std::string(message)); | |
| 61 } | |
| 62 | |
| 63 virtual void EnterContext(const std::string& message) | |
| 64 { | |
| 65 if (!contexts_.get()) | |
| 66 { | |
| 67 contexts_.reset(new std::vector<std::string>()); | |
| 68 } | |
| 69 contexts_->push_back(message); | |
| 70 | |
| 71 if (logContextChanges_) | |
| 72 { | |
| 73 Info(".. entering"); | |
| 74 } | |
| 75 } | |
| 76 | |
| 77 virtual void LeaveContext() | |
| 78 { | |
| 79 if (logContextChanges_) | |
| 80 { | |
| 81 Info(".. leaving"); | |
| 82 } | |
| 83 | |
| 84 contexts_->pop_back(); | |
| 85 if (contexts_->size() == 0) | |
| 86 { | |
| 87 contexts_.reset(NULL); | |
| 88 } | |
| 89 } | |
| 90 | |
| 91 protected: | |
| 92 | |
| 93 virtual std::string GetContext() | |
| 94 { | |
| 95 if (contexts_.get() != NULL && contexts_->size() > 0) | |
| 96 { | |
| 97 return "|" + boost::algorithm::join(*contexts_, " | ") + "|"; | |
| 98 } | |
| 99 else | |
| 100 { | |
| 101 return std::string("|"); | |
| 102 } | |
| 103 } | |
| 104 }; | |
| 105 | |
| 106 | |
| 107 /* RAII to set a Log context. | |
| 108 * Example: | |
| 109 * ILogger* logger = new OrthancPluginLogger(..); | |
| 110 * { | |
| 111 * LogContext logContext(logger, "A"); | |
| 112 * { | |
| 113 * LogContext nestedLogContext(logger, "B"); | |
| 114 * logger->Error("out of memory"); | |
| 115 * } | |
| 116 * } | |
| 117 * will produce: | |
| 118 * |A | B| out of memory | |
| 119 * | |
| 120 * furthermore, if LogContextChanges are enabled in the BaseLogger, | |
| 121 * you'll get; | |
| 122 * |A| .. entering | |
| 123 * |A | B| .. entering | |
| 124 * |A | B| out of memory | |
| 125 * |A | B| .. leaving | |
| 126 * |A| .. leaving | |
| 127 */ | |
| 128 class LogContext | |
| 129 { | |
| 130 ILogger* logger_; | |
| 131 public: | |
| 132 LogContext(ILogger* logger, const char* context) : | |
| 133 logger_(logger) | |
| 134 { | |
| 135 logger_->EnterContext(context); | |
| 136 } | |
| 137 | |
| 138 LogContext(ILogger* logger, const std::string& context) : | |
| 139 logger_(logger) | |
| 140 { | |
| 141 logger_->EnterContext(context); | |
| 142 } | |
| 143 | |
| 144 ~LogContext() | |
| 145 { | |
| 146 logger_->LeaveContext(); | |
| 147 } | |
| 148 | |
| 149 }; | |
| 150 } |