Mercurial > hg > orthanc
view Resources/Samples/CppHelpers/Logging/ILogger.h @ 3717:914f783ef085
development snapshot of the Orthanc framework for DICOMweb 1.1
author | Sebastien Jodogne <s.jodogne@gmail.com> |
---|---|
date | Wed, 04 Mar 2020 10:13:34 +0100 |
parents | 427a13084241 |
children |
line wrap: on
line source
#pragma once #include <string> #include <vector> #include <boost/algorithm/string.hpp> #include <boost/thread.hpp> namespace OrthancHelpers { inline std::string ShortenId(const std::string& orthancUuid) { size_t firstHyphenPos = orthancUuid.find_first_of('-'); if (firstHyphenPos == std::string::npos) { return orthancUuid; } else { return orthancUuid.substr(0, firstHyphenPos); } } // Interface for loggers providing the same interface // in Orthanc framework or in an Orthanc plugins. // Furthermore, compared to the LOG and VLOG macros, // these loggers will provide "contexts". class ILogger { public: virtual ~ILogger() {} virtual void Trace(const char* message) = 0; virtual void Trace(const std::string& message) = 0; virtual void Info(const char* message) = 0; virtual void Info(const std::string& message) = 0; virtual void Warning(const char* message) = 0; virtual void Warning(const std::string& message) = 0; virtual void Error(const char* message) = 0; virtual void Error(const std::string& message) = 0; virtual void EnterContext(const char* message, bool forceLogContextChange = false) = 0; virtual void EnterContext(const std::string& message, bool forceLogContextChange = false) = 0; virtual void LeaveContext(bool forceLogContextChange = false) = 0; }; // Implements ILogger by providing contexts. Contexts defines // the "call-stack" of the logs and are prepended to the log. // check LogContext class for more details class BaseLogger : public ILogger { #if ORTHANC_ENABLE_THREADS == 1 boost::thread_specific_ptr<std::vector<std::string>> contexts_; #else std::auto_ptr<std::vector<std::string>> contexts_; #endif bool logContextChanges_; public: BaseLogger() : logContextChanges_(false) { } void EnableLogContextChanges(bool enable) { logContextChanges_ = enable; } virtual void EnterContext(const char* message, bool forceLogContextChange = false) { EnterContext(std::string(message), forceLogContextChange); } virtual void EnterContext(const std::string& message, bool forceLogContextChange = false) { if (!contexts_.get()) { contexts_.reset(new std::vector<std::string>()); } contexts_->push_back(message); if (logContextChanges_ || forceLogContextChange) { Info(".. entering"); } } virtual void LeaveContext(bool forceLogContextChange = false) { if (logContextChanges_ || forceLogContextChange) { Info(".. leaving"); } contexts_->pop_back(); if (contexts_->size() == 0) { contexts_.reset(NULL); } } protected: virtual std::string GetContext() { if (contexts_.get() != NULL && contexts_->size() > 0) { return "|" + boost::algorithm::join(*contexts_, " | ") + "|"; } else { return std::string("|"); } } }; /* RAII to set a Log context. * Example: * ILogger* logger = new OrthancPluginLogger(..); * { * LogContext logContext(logger, "A"); * { * LogContext nestedLogContext(logger, "B"); * logger->Error("out of memory"); * } * } * will produce: * |A | B| out of memory * * furthermore, if LogContextChanges are enabled in the BaseLogger, * you'll get; * |A| .. entering * |A | B| .. entering * |A | B| out of memory * |A | B| .. leaving * |A| .. leaving */ class LogContext { ILogger* logger_; bool forceLogContextChange_; public: LogContext(ILogger* logger, const char* context, bool forceLogContextChange = false) : logger_(logger), forceLogContextChange_(forceLogContextChange) { logger_->EnterContext(context, forceLogContextChange_); } LogContext(ILogger* logger, const std::string& context, bool forceLogContextChange = false) : logger_(logger), forceLogContextChange_(forceLogContextChange) { logger_->EnterContext(context, forceLogContextChange_); } ~LogContext() { logger_->LeaveContext(forceLogContextChange_); } }; }