////  FileLogger.cpp//  interface/src////  Created by Stojce Slavkovski on 12/22/13.//  Copyright 2013 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #include "FileLogger.h" #include <QtCore/QDateTime>#include <QtCore/QFile>#include <QtCore/QDir>#include <QtGui/QDesktopServices> #include <NumericalConstants.h>#include <FileUtils.h>#include <SharedUtil.h> #include "HifiSockAddr.h" static const QString FILENAME_FORMAT = "hifi-log_%1_%2.txt";static const QString DATETIME_FORMAT = "yyyy-MM-dd_hh.mm.ss";static const QString LOGS_DIRECTORY = "Logs";// Max log size is 1 MBstatic const qint64 MAX_LOG_SIZE = 1024 * 1024;// Max log age is 1 hourstatic const uint64_t MAX_LOG_AGE_USECS = USECS_PER_SECOND * 3600; QString getLogRollerFilename() {    QString result = FileUtils::standardPath(LOGS_DIRECTORY);    QHostAddress clientAddress = getLocalAddress();    QDateTime now = QDateTime::currentDateTime();    result.append(QString(FILENAME_FORMAT).arg(clientAddress.toString(), now.toString(DATETIME_FORMAT)));    return result;} const QString& getLogFilename() {    static QString fileName = FileUtils::standardPath(LOGS_DIRECTORY) + "hifi-log.txt";    return fileName;}  class FilePersistThread : public GenericQueueThread < QString > {    public:    FilePersistThread(const FileLogger& logger) : _logger(logger) {        setObjectName("LogFileWriter");    } protected:    void rollFileIfNecessary(QFile& file) {        uint64_t now = usecTimestampNow();        if ((file.size() > MAX_LOG_SIZE) || (now - _lastRollTime) > MAX_LOG_AGE_USECS) {            QString newFileName = getLogRollerFilename();            if (file.copy(newFileName)) {                _lastRollTime = now;                file.open(QIODevice::WriteOnly | QIODevice::Truncate);                file.close();                qDebug() << "Rolled log file:" << newFileName;            }        }    }     virtual bool processQueueItems(const Queue& messages) {        QFile file(_logger._fileName);        rollFileIfNecessary(file);        if (file.open(QIODevice::WriteOnly | QIODevice::Append | QIODevice::Text)) {            QTextStream out(&file);            foreach(const QString& message, messages) {                out << message;            }        }        return true;    }private:    const FileLogger& _logger;    uint64_t _lastRollTime = 0; }; static FilePersistThread* _persistThreadInstance; FileLogger::FileLogger(QObject* parent) :    AbstractLoggerInterface(parent), _fileName(getLogFilename()){    _persistThreadInstance = new FilePersistThread(*this);    _persistThreadInstance->initialize(true, QThread::LowestPriority); } FileLogger::~FileLogger() {    _persistThreadInstance->terminate();} void FileLogger::addMessage(const QString& message) {    _persistThreadInstance->queueItem(message);    emit logReceived(message);} void FileLogger::locateLog() {    FileUtils::locateFile(_fileName);} QString FileLogger::getLogData() {    QString result;    QFile f(_fileName);    if (f.open(QFile::ReadOnly | QFile::Text)) {        result = QTextStream(&f).readAll();    }    return result;}