Re: [Bluez-devel] Moving towards a new API for BlueZ 4.0

[Manuel Naranjo <manuel@aircable.net>]

Marcel,
> With Bluetooth 2.1 and Extended Inquiry this problem  
> goes away anyway since the name will be part of the Inquiry Result. In  
> case of Bluetooth 2.0 or before, you can always cancel the inquiry  
> when you found the device you are looking for. The name resolving will  
> happen in the order of closest device first. So from the UI  
> perspective you will always have a good experience since users are  
> normally interested in the devices around them. So the only drawback  
> is a Bluetooth 1.1 or before host controller. They are quite rare  
> these days and thus we decided to ignore that problem. Once you  
> connect to a remote device we will automatically fetch the name. Also  
> the name is always cached and only retrieved when we have no  
> information about that device.
>   
Mhh this makes some sense but... Bluetooth 2.1 isn't out there yet
right? And it will also require a bluetooth 2.1 dongle too right?
What if I don't want a GUI, I just want to make a non interactive
application that needs to track devices that passes near me? Wouldn't I
loose time in resolving names?

> Also the DeviceFound has the Bluetooth address as first parameter.  
> This allows a simple D-Bus filter rule to find them quickly and then  
> for example cancel the discovery process. This helps a lot in the case  
> you are looking for a specific device.
>   
How does this work? In the past if name wasn't know you will firstly get
a DeviceFound call back, and then a DeviceNameUpdated call back. How
will this work in the future? Will I get one callback as soon as the
device is found, and another one once the name is resolved, or just one
with name resolved.

> You might have also seen that we stripped the whole API a lot.
Indeed, it looks quite easier now.

> We removed the support for functions that seems to be useful when we  
> designed the current API (about two years ago), but were never used  
> within bluez-gnome or the Maemo UI. The goal of the API is to provide  
> methods that are needed to implement a good Bluetooth experience for  
> without having a bloated and rich API.
>   
What if we don't want to target GUI devices? Suppose you have a device
in the door that tracks who comes by, and then opens the door depending
on the bluetooth address, each time a new not know device is discovered
it will make my discovery slower. In the case it only gives one
callback, if you get a callback as soon as the bt address is known.

Is there any chance I can implement resolveName as a property for Adapter?

Cheers,
Manuel

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