Problems starting a QtService using QtServiceController

[Stiander]

Problem remains unsolved. Noone seems to want to touch it. Please reply here if one or more of the following is valid:
* you have the same problem, and you cannot solve it either
* you had the same problem, but you solved it
* you see whats wrong with the code
* you think the code looks ok, "there must be something else"
* you could perhaps see what's wrong, but you need more information

have a good weekend everyone!

[granan]

I have similar problem as You Stiander. I use Qt 4.7 and it doesn't see QtServiceController class. I have not found in doc on qt.nokia.com informations about this QtService module in Qt 4.7. It means that it is not support now? So how create program as service and control its cycle from Qt level?

[seven7]

Your CService::start() function shouldn´t be blocking. It is not supposed to be the service´s main function (it took me some time to figure that out...). Using these classes there is no main function. You just get an event loop which you start in your programs main() function using myservice.exec().

To implement your functionality you have to use an event driven approach (signals and slots). Look at the following example. It writes once a second a string to your applications event log.

#ifndef SVCMAIN_H
#define SVCMAIN_H
 
#include <QObject>
 
class SvcMain : public QObject
{
    Q_OBJECT
public:
    explicit SvcMain(QObject *parent = 0);
 
signals:
 
public slots:
    void handleTimerEvent();
};
 
#endif // SVCMAIN_H

#ifndef SVCMAIN_H
#define SVCMAIN_H

#include <QObject>

class SvcMain : public QObject
{
    Q_OBJECT
public:
    explicit SvcMain(QObject *parent = 0);

signals:

public slots:
    void handleTimerEvent();
};

#endif // SVCMAIN_H

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The constructor creates a periodic timer:

#include "svcmain.h"
#include <QTimer>
#include "qtservice/qtservice.h"
 
SvcMain::SvcMain(QObject *parent) :
    QObject(parent)
{
    QTimer *timer = new QTimer(this);
    connect(timer, SIGNAL(timeout()), this, SLOT(handleTimerEvent()));
    timer->start(1000);
}
 
void SvcMain::handleTimerEvent()
{
    QtServiceBase::instance()->logMessage(QString("handleTimerEvent"), QtServiceBase::Information );
}

#include "svcmain.h"
#include <QTimer>
#include "qtservice/qtservice.h"

SvcMain::SvcMain(QObject *parent) :
    QObject(parent)
{
    QTimer *timer = new QTimer(this);
    connect(timer, SIGNAL(timeout()), this, SLOT(handleTimerEvent()));
    timer->start(1000);
}

void SvcMain::handleTimerEvent()
{
    QtServiceBase::instance()->logMessage(QString("handleTimerEvent"), QtServiceBase::Information );
}

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Your start() function should look like this:

void CService::start()
{
    svcmain = new SvcMain();
}

void CService::start()
{
    svcmain = new SvcMain();
}

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svcmain is a private member variable:

private:
	SvcMain* svcmain;

private:
	SvcMain* svcmain;

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Look at the examples on how to implement the remaining functions (stop/resume/...).
Hope this helps.

Sebastian