Hello,

I would like to build a android smartphone application that receives
data from a server on a regular basis and
refresh screen
You can see it as a "IBM slam tracker" for tennis grand slam results
or a weather application ... whatever.
Anyway, the goal is to have a server that send messages to several
devices in a a way that looks like a continuous data flow or devices
that request data from server but I think push is the more accurate
way to do so ?
I found a so called C2DM Framework that looks like what I expect but,
according to google official documentation,
google apply several limitations to the framework :
- limit in the number of devices a server is able to contact
- limit in the number of messages a server can send to the same device
- 1ko limit for messages size
- no further information the number of messages or devices, we just
know that "there is a limit".

>From that point I have several questions :
- do you confirm that the push architecture is the accurate way to
achieve such a goal ?
- do you know about the C2DM limitations ?
- How do the existing applications based on continuous data flow
works ? What is there most common architecture ?

A last point is that if want to be able to control the devices allowed
to access the server data and therefore
I do not want something like RSS.

Thanks for your help
Regards

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