Re: [Opensync-users] opensync+isync breaks fast syncing, generates dupes

[Michael B. <mic...@cm...>]

Daniel Gollub schrieb:
> On Tuesday 12 February 2008, Michael Bell wrote:
>> Only an idea, is it possible to register connect functions for the main
>> sink and the object sinks at the same plugin? If yes then we could use
>> the main sink to detect the network connect and the object sink to check
>> which type of synchronization is necessary. So the correct sync type can
>> be configured before OpenSync calls get_changeinfo.
> 
> Good catch!
> 
> I'm quite sure (without checking the code) this is the root cause. SyncML 
> plugin flags the Main Sink to perform a SlowSync (since the connect function 
> detect an anchor mismatch).

No, this is wrong. The SyncML plugin flags the object sink to perform a 
slow-sync but this can happen sometime after get_changeinfo was called 
(please see _ds_*_recv_alert).

> BUT the slow-sync flag on the main-sink doesn't affect the other sinks. So the 
> file-sync plugin will never get asked to perform a slow-sync if this got 
> triggered by a plugin which is using a main-sink function (like the SyncML 
> plugin).

I think that the slow-sync flag is simply set too late for the other 
plugins. If the file-sync function get_changeinfo is called first 
(because it is the first group member) then it is too late for all other 
plugins to set the slow-sync flag.

The solution would be to put the alert handling into some new functions 
(like get_syncmode) and register them as connect functions for the 
object sinks. The "problem" is that we have to break up again the 
complete SyncML plugin code.

Best regards

Michael
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Michael Bell                    Humboldt-Universitaet zu Berlin

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