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2010-12-15
, 22:32
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Posts: 60 |
Thanked: 40 times |
Joined on May 2010
@ Skovballe, Denmark
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#2
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Hi
You can use QtService, you can download it from qt.nokia.com.
I'm using it in one of my projects, and it works great with QtMobility and QDBus, only problem I had was when trying to use anything from user space (calendar in my case), as this is a service, it does not have readily access to user space.
Kim
You can use QtService, you can download it from qt.nokia.com.
I'm using it in one of my projects, and it works great with QtMobility and QDBus, only problem I had was when trying to use anything from user space (calendar in my case), as this is a service, it does not have readily access to user space.
Kim
| The Following User Says Thank You to kif For This Useful Post: | ||
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2010-12-15
, 23:53
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Posts: 1,048 |
Thanked: 979 times |
Joined on Mar 2008
@ SF Bay Area
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#3
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Originally Posted by smandava
It depends what you want to achieve. A service is fundamentally an application that has no user interaction and thus no need for a UI.
Hi,
My requirement is to create a Qt based backend service that runs when the device boots and call a function periodically (say every 15 minutes). Very similar to a cron tab.
So far I could find QDBus and QtMobility service framework modules that shows how to implement a service. It is not clear from the documentation weather these services can be run as daemons or the service die after serving the client request.
Can somebody provide a qt way of creating service that runs as daemon and doesn't hurt device battery? Any example projects or code snippets would be much appreciated.
Thanks,
Sateesh.
It may be instructed to perform certain functionality by "poking" it using an IPC mechanism like DBus.
If you intend your service to be cross platform to Windows or Mac, then you should use QtService.
Installing and starting the service is heavily dependent on the target OS:
eg. Most Linux variants have upstart / init.d / event.d, Windows would require you to setup registry entries or invoke SCM.
__________________
qgvdial: Google Voice client. All downloads
qgvtp: Phone integration for the n900 that dials out and sends texts using qgvdial.
mosquitto: message broker that implements the MQ Telemetry Transport protocol version 3.
qgvnotify: Google voice and contacts notifier for diablo and maemo.
If you want to thank me, click the Thanks button.
If you'd like to thank my applications, vote to move them to extras.
qgvdial: Google Voice client. All downloads
qgvtp: Phone integration for the n900 that dials out and sends texts using qgvdial.
mosquitto: message broker that implements the MQ Telemetry Transport protocol version 3.
qgvnotify: Google voice and contacts notifier for diablo and maemo.
If you want to thank me, click the Thanks button.
If you'd like to thank my applications, vote to move them to extras.
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2010-12-16
, 00:47
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Posts: 7 |
Thanked: 1 time |
Joined on Apr 2010
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#4
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Thanks for the leads about QTSevice. If QTService doesn't work in user space, I am afraid I cant use it. I will look at the QTService api closely.
To clarify what exactly what I am trying to achieve, I have a qt application that can sync Google contacts with N900 device contacts. I am trying to set it up as a service so that the service can call the sync function every 15 minutes without user interaction. Cross platform functionality is not my primary concern at this time.
This service needs to run under the user space and be started every time the device is rebooted. I am not sure if init.d/event.d scripts always run as root or if they can be configured to run under user space.
I will have another UI client that will poke the service to modify the update frequency etc..
Thanks,
Sateesh.
To clarify what exactly what I am trying to achieve, I have a qt application that can sync Google contacts with N900 device contacts. I am trying to set it up as a service so that the service can call the sync function every 15 minutes without user interaction. Cross platform functionality is not my primary concern at this time.
This service needs to run under the user space and be started every time the device is rebooted. I am not sure if init.d/event.d scripts always run as root or if they can be configured to run under user space.
I will have another UI client that will poke the service to modify the update frequency etc..
Thanks,
Sateesh.
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2010-12-16
, 01:17
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Posts: 1,048 |
Thanked: 979 times |
Joined on Mar 2008
@ SF Bay Area
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#5
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All of QT is user space. Do not even think of using it in kernel mode.
Also: I have a google contacts API parser ready in case you're interested.
I was supposed to work on a google contacts sync tool, but I've pushed it back until my other project is in better shape.
Also: I have a google contacts API parser ready in case you're interested.
I was supposed to work on a google contacts sync tool, but I've pushed it back until my other project is in better shape.
__________________
qgvdial: Google Voice client. All downloads
qgvtp: Phone integration for the n900 that dials out and sends texts using qgvdial.
mosquitto: message broker that implements the MQ Telemetry Transport protocol version 3.
qgvnotify: Google voice and contacts notifier for diablo and maemo.
If you want to thank me, click the Thanks button.
If you'd like to thank my applications, vote to move them to extras.
qgvdial: Google Voice client. All downloads
qgvtp: Phone integration for the n900 that dials out and sends texts using qgvdial.
mosquitto: message broker that implements the MQ Telemetry Transport protocol version 3.
qgvnotify: Google voice and contacts notifier for diablo and maemo.
If you want to thank me, click the Thanks button.
If you'd like to thank my applications, vote to move them to extras.
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2010-12-16
, 01:42
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Posts: 2,473 |
Thanked: 12,265 times |
Joined on Oct 2009
@ Jerusalem, PS/IL
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#6
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Why not just use a QTimer instance?
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2010-12-16
, 01:49
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Posts: 7 |
Thanked: 1 time |
Joined on Apr 2010
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#7
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Originally Posted by uvatbc
I guess what Kim mentioned above is QtMobilty Contacts Api opens the address book for the user who started the process. For instance QContactManager.contacts() calls gives different results for user account and developer account even tho its the same binary is making the call.
All of QT is user space. Do not even think of using it in kernel mode.
Also: I have a google contacts API parser ready in case you're interested.
I was supposed to work on a google contacts sync tool, but I've pushed it back until my other project is in better shape.
If the service is started (by init.d or upstart) as root user, the service will see the address book of root account instead of the intended default user account. Do you know if init.d or event.d scripts can start a process as default user?
I am noob to the Qt Programming. I would love to get the GData parser if you have available. Please PM me or post the link to this thread.
Thanks,
Sateesh.
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2010-12-16
, 01:59
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Posts: 7 |
Thanked: 1 time |
Joined on Apr 2010
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#8
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Originally Posted by MohammadAG
I am new to Qt and not sure if If this a common way to creating server in Qt. Not sure if the program consumes any resources (effecting the battery life) while sitting waiting for QTimer signal.
Why not just use a QTimer instance?
If this not CPU intensive, I will proceed with this option.
Thanks,
Sateesh.
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2010-12-16
, 02:13
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Posts: 2,355 |
Thanked: 5,249 times |
Joined on Jan 2009
@ Barcelona
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#9
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There's a cron-like daemon running on the device:
http://wiki.maemo.org/Documentation/...larm_Framework
http://wiki.maemo.org/Documentation/...larm_Framework
| The Following User Says Thank You to javispedro For This Useful Post: | ||
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2010-12-16
, 02:32
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Posts: 7 |
Thanked: 1 time |
Joined on Apr 2010
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#10
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Originally Posted by javispedro
Great. I wish there is a Qt API for alarmd.
There's a cron-like daemon running on the device:
http://wiki.maemo.org/Documentation/...larm_Framework
My requirement is to create a Qt based backend service that runs when the device boots and call a function periodically (say every 15 minutes). Very similar to a cron tab.
So far I could find QDBus and QtMobility service framework modules that shows how to implement a service. It is not clear from the documentation weather these services can be run as daemons or the service die after serving the client request.
Can somebody provide a qt way of creating service that runs as daemon and doesn't hurt device battery? Any example projects or code snippets would be much appreciated.
Thanks,
Sateesh.