src/gromacs/utility/loggerbuilder.cpp

   1 /*
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  35 #include "gmxpre.h"
  36
  37 #include "loggerbuilder.h"
  38
  39 #include <memory>
  40 #include <vector>
  41
  42 #include "gromacs/utility/filestream.h"
  43 #include "gromacs/utility/logger.h"
  44 #include "gromacs/utility/stringutil.h"
  45 #include "gromacs/utility/textwriter.h"
  46
  47 namespace gmx
  48 {
  49
  50 class LogTargetCollection : public ILogTarget
  51 {
  52 public:
  53     void addTarget(ILogTarget* target) { targets_.push_back(target); }
  54
  55     void writeEntry(const LogEntry& entry) override
  56     {
  57         for (ILogTarget* target : targets_)
  58         {
  59             target->writeEntry(entry);
  60         }
  61     }
  62
  63 private:
  64     std::vector<ILogTarget*> targets_;
  65 };
  66
  67 class LogTargetFormatter : public ILogTarget
  68 {
  69 public:
  70     explicit LogTargetFormatter(TextOutputStream* stream) : writer_(stream) {}
  71
  72     void writeEntry(const LogEntry& entry) override;
  73
  74 private:
  75     TextWriter writer_;
  76 };
  77
  78
  79 void LogTargetFormatter::writeEntry(const LogEntry& entry)
  80 {
  81     if (entry.asParagraph)
  82     {
  83         writer_.ensureEmptyLine();
  84     }
  85     writer_.writeLine(entry.text);
  86     if (entry.asParagraph)
  87     {
  88         writer_.ensureEmptyLine();
  89     }
  90 }
  91
  92 /********************************************************************
  93  * LoggerOwner::Impl
  94  */
  95
  96 class LoggerOwner::Impl
  97 {
  98 public:
  99     explicit Impl(ILogTarget* loggerTargets[MDLogger::LogLevelCount]) : logger_(loggerTargets) {}
 100
 101     MDLogger                                       logger_;
 102     std::vector<std::unique_ptr<TextOutputStream>> streams_;
 103     std::vector<std::unique_ptr<ILogTarget>>       targets_;
 104 };
 105
 106 /********************************************************************
 107  * LoggerOwner
 108  */
 109
 110 LoggerOwner::LoggerOwner(std::unique_ptr<Impl> impl) :
 111     impl_(impl.release()),
 112     logger_(&impl_->logger_)
 113 {
 114 }
 115
 116 LoggerOwner::LoggerOwner(LoggerOwner&& other) noexcept :
 117     impl_(std::move(other.impl_)),
 118     logger_(&impl_->logger_)
 119 {
 120 }
 121
 122 LoggerOwner& LoggerOwner::operator=(LoggerOwner&& other) noexcept
 123 {
 124     impl_   = std::move(other.impl_);
 125     logger_ = &impl_->logger_;
 126     return *this;
 127 }
 128
 129 LoggerOwner::~LoggerOwner() {}
 130
 131 /********************************************************************
 132  * LoggerBuilder::Impl
 133  */
 134
 135 class LoggerBuilder::Impl
 136 {
 137 public:
 138     std::vector<std::unique_ptr<TextOutputStream>> streams_;
 139     std::vector<std::unique_ptr<ILogTarget>>       targets_;
 140     std::vector<ILogTarget*>                       loggerTargets_[MDLogger::LogLevelCount];
 141 };
 142
 143 /********************************************************************
 144  * LoggerBuilder
 145  */
 146
 147 LoggerBuilder::LoggerBuilder() : impl_(new Impl) {}
 148
 149 LoggerBuilder::~LoggerBuilder() {}
 150
 151 void LoggerBuilder::addTargetStream(MDLogger::LogLevel level, TextOutputStream* stream)
 152 {
 153     impl_->targets_.push_back(std::unique_ptr<ILogTarget>(new LogTargetFormatter(stream)));
 154     ILogTarget* target = impl_->targets_.back().get();
 155     for (int i = 0; i <= static_cast<int>(level); ++i)
 156     {
 157         impl_->loggerTargets_[i].push_back(target);
 158     }
 159 }
 160
 161 void LoggerBuilder::addTargetFile(MDLogger::LogLevel level, FILE* fp)
 162 {
 163     std::unique_ptr<TextOutputStream> stream(new TextOutputFile(fp));
 164     addTargetStream(level, stream.get());
 165     impl_->streams_.push_back(std::move(stream));
 166 }
 167
 168 LoggerOwner LoggerBuilder::build()
 169 {
 170     ILogTarget* loggerTargets[MDLogger::LogLevelCount];
 171     for (int i = 0; i < MDLogger::LogLevelCount; ++i)
 172     {
 173         auto& levelTargets = impl_->loggerTargets_[i];
 174         loggerTargets[i]   = nullptr;
 175         if (!levelTargets.empty())
 176         {
 177             if (levelTargets.size() == 1)
 178             {
 179                 loggerTargets[i] = levelTargets[0];
 180             }
 181             else
 182             {
 183                 std::unique_ptr<LogTargetCollection> collection(new LogTargetCollection);
 184                 for (auto& target : levelTargets)
 185                 {
 186                     collection->addTarget(target);
 187                 }
 188                 loggerTargets[i] = collection.get();
 189                 impl_->targets_.push_back(std::move(collection));
 190             }
 191         }
 192         levelTargets.clear();
 193     }
 194     std::unique_ptr<LoggerOwner::Impl> data(new LoggerOwner::Impl(loggerTargets));
 195     data->targets_ = std::move(impl_->targets_);
 196     data->streams_ = std::move(impl_->streams_);
 197     return LoggerOwner(std::move(data));
 198 }
 199
 200 } // namespace gmx