ubiqlogsaver.cpp

/*
 * Copyright (c) 2011 Nokia Corporation
 *
 * This file is part of the Push Snowboarding Project, More info at:
 * www.pushsnowboading.com
 *
 * Author: Clovis Scotti <scotti@ieee.org>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 *
 */

#include "ubiqlogsaver.h"

UbiqLogSaver::UbiqLogSaver(uint a_start_time)
{
    start_time = a_start_time;
    CreateRunDir();

    QString rawLogFilename = (dirName + FSC_FSYS_SLASH) + "RawLog.xml";

    qDebug() << "RawLog Filename: " << rawLogFilename;

    dataFile = new QFile(rawLogFilename);


    dataFile->open(QFile::WriteOnly | QFile::Text);
    xml.setDevice(dataFile);
    xml.setAutoFormatting(true);

    xml.writeStartDocument();
    xml.writeStartElement("N8SensorsLog");

    runEnd = false;
    this->start();

    tickcount = 0;
}

UbiqLogSaver::~UbiqLogSaver()
{
    this->run_end();//will return immediately if everything went ok since runEnd will be true
}

void UbiqLogSaver::run()
{
    while(true)
    {
        bool leaving = false;
        runControlLock.lock();
        if(!runEnd)
            runControlSignal.wait(&runControlLock);
        else
            leaving = true;
        runControlLock.unlock();

        dumpBuffers();

        if(leaving){
            break;
        }
    }
    exit(0);
}

void UbiqLogSaver::dumpBuffers()
{
    QMutexLocker onlyOneAtATime(&dumpBuffersLock);
    Q_UNUSED(onlyOneAtATime);

    ticksLock.lock();
    while(ticksBuffer.count() > 0){
        NPushLogTick * tick = ticksBuffer.dequeue();
        ticksLock.unlock();

        tick->dump_to_xml(xml);
        dataFile->flush();
        ticksLock.lock();
        tickcount++;
//            qDebug() << "saving tick = " << tickcount;
    }
    ticksLock.unlock();

    reportsLock.lock();
    while(reportBuffer.count() > 0){
        qDebug() << "report being dumped";
        NPushGenReport * repr = reportBuffer.dequeue();

        reportsLock.unlock();
        repr->save_to_dir(dirName);
        reportsLock.lock();
    }
    reportsLock.unlock();
}

void UbiqLogSaver::run_end()
{
    if(runEnd)
        return;
    qDebug() << "before signaling exit";
    runControlLock.lock();
    runEnd = true;
    runControlLock.unlock();
    qDebug() << "waking up saver";
    runControlSignal.wakeAll();
    this->wait();//Adding a timeout here? not!?
    qDebug() << "saver exited";
    xml.writeEndElement();//N8SensorsLog
    xml.writeEndDocument();
    dataFile->close();
    qDebug() << "File closed, dumped " << tickcount << " ticks";
}

void UbiqLogSaver::CreateRunDir()
{
    dirName = QString(FSC_RUNS_FOLDERS_ROOT)+QString(FSC_RUNS_PREFIX);

#ifdef Q_WS_MAEMO_5
    qDebug() << "In Maemo home = " << QDir::homePath();
    dirName = QDir::homePath() + QString("/PushSnowboarding/") + QString(FSC_RUNS_PREFIX);
#endif

    dirName += QString::number(start_time);
    dirName += QDateTime::fromTime_t(start_time).toString("_hhmm");
    QFSFileEngine fse;
    qDebug() << "Trying to create: " << dirName;
    if(!fse.mkdir(dirName, false)) {
        qDebug() << "Could not create run directory";
        QCoreApplication::exit();
    }
}


void UbiqLogSaver::log_tick_in(NPushLogTick* tick)
{
    ticksLock.lock();
    ticksBuffer.enqueue(tick);
    ticksLock.unlock();

    if(ticksBuffer.count() > maxBufferSize) {
        dumpBuffers();
    }

    runControlSignal.wakeAll();

}

void UbiqLogSaver::report_in(NPushGenReport* rep)
{
    reportsLock.lock();
    reportBuffer.enqueue(rep);
    reportsLock.unlock();

    if(reportBuffer.count() > maxBufferSize) {
        dumpBuffers();
    }

    runControlSignal.wakeAll();
}