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#pragma once |
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#include <plog/Appenders/IAppender.h> |
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#include <plog/Converters/UTF8Converter.h> |
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#include <plog/Util.h> |
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#include <algorithm> |
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|
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namespace plog |
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{ |
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template<class Formatter, class Converter = UTF8Converter> |
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class RollingFileAppender : public IAppender |
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{ |
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public: |
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RollingFileAppender(const util::nchar* fileName, size_t maxFileSize = 0, int maxFiles = 0) |
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: m_fileSize() |
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, m_maxFileSize((std::max)(static_cast<off_t>(maxFileSize), static_cast<off_t>(1000))) // set a lower limit for the maxFileSize |
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, m_lastFileNumber((std::max)(maxFiles - 1, 0)) |
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, m_firstWrite(true) |
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{ |
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util::splitFileName(fileName, m_fileNameNoExt, m_fileExt); |
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} |
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|
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#ifdef _WIN32 |
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RollingFileAppender(const char* fileName, size_t maxFileSize = 0, int maxFiles = 0) |
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: m_fileSize() |
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, m_maxFileSize((std::max)(static_cast<off_t>(maxFileSize), static_cast<off_t>(1000))) // set a lower limit for the maxFileSize |
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, m_lastFileNumber((std::max)(maxFiles - 1, 0)) |
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, m_firstWrite(true) |
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{ |
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util::splitFileName(util::toWide(fileName).c_str(), m_fileNameNoExt, m_fileExt); |
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} |
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#endif |
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|
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virtual void write(const Record& record) |
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{ |
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util::MutexLock lock(m_mutex); |
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|
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if (m_firstWrite) |
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{ |
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openLogFile(); |
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m_firstWrite = false; |
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} |
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else if (m_lastFileNumber > 0 && m_fileSize > m_maxFileSize && -1 != m_fileSize) |
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{ |
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rollLogFiles(); |
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} |
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|
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int bytesWritten = m_file.write(Converter::convert(Formatter::format(record))); |
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|
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if (bytesWritten > 0) |
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{ |
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m_fileSize += bytesWritten; |
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} |
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} |
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|
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private: |
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void rollLogFiles() |
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{ |
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m_file.close(); |
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|
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util::nstring lastFileName = buildFileName(m_lastFileNumber); |
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util::File::unlink(lastFileName.c_str()); |
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|
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for (int fileNumber = m_lastFileNumber - 1; fileNumber >= 0; --fileNumber) |
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{ |
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util::nstring currentFileName = buildFileName(fileNumber); |
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util::nstring nextFileName = buildFileName(fileNumber + 1); |
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|
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util::File::rename(currentFileName.c_str(), nextFileName.c_str()); |
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} |
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|
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openLogFile(); |
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} |
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|
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void openLogFile() |
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{ |
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util::nstring fileName = buildFileName(); |
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m_fileSize = m_file.open(fileName.c_str()); |
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|
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if (0 == m_fileSize) |
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{ |
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int bytesWritten = m_file.write(Converter::header(Formatter::header())); |
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|
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if (bytesWritten > 0) |
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{ |
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m_fileSize += bytesWritten; |
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} |
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} |
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} |
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|
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util::nstring buildFileName(int fileNumber = 0) |
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{ |
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util::nstringstream ss; |
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ss << m_fileNameNoExt; |
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|
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if (fileNumber > 0) |
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{ |
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ss << '.' << fileNumber; |
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} |
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|
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if (!m_fileExt.empty()) |
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{ |
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ss << '.' << m_fileExt; |
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} |
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|
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return ss.str(); |
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} |
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|
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private: |
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util::Mutex m_mutex; |
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util::File m_file; |
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off_t m_fileSize; |
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const off_t m_maxFileSize; |
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const int m_lastFileNumber; |
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util::nstring m_fileExt; |
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util::nstring m_fileNameNoExt; |
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bool m_firstWrite; |
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}; |
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} |
