Re: [Tracker] Question on tracking changes..

[Sriram Ramkrishna <sri aracnet com>]

On Thu, Aug 10, 2006 at 09:51:14AM +0100, Jamie McCracken wrote:
> Sri Ramkrishna wrote:
> > So I'm working a bit on a rhythmbox backend using tracker.  I want to
> > know when tracker has detected a new music file.  Is there some kind of
> > DBus signal I can listen to for this?  How would I do that?
>
> not at the moment - I have disabled signals until we have live query 
> support.

OK.  So for now, I'll have to just set it up so that it fills the database
and then worry about what happens afterwards.

> With live query support you will be able to listen by filtering on the 
> live_query_id (usig dbus match rules) to get new hits and also deletes 
> for any particular query (any dbus method that has a live_query_id 
> parameter)

Sounds good.

> Implementing live query support is not hard but I am doing structural 
> changes at the moment and would like to get these completed before 
> adding new stuff.

Cool, no doubt a good foundation is a requirement before adding new
stories using a building analogy. :-)

> I am experimenting with replacing mysql's fulltext stuff with a much 
> faster and more scalable hash table using the super fast QDBM 
> (http://qdbm.sourceforge.net/spex.html). As Hash tables are O(1) in 
> performance it means it will be super fast no matter how much stuff you 
> index and it also means I can add custom stuff like stemming and custom 
> ranking.

Gotcha .. 

> If above is successful it could also pave the way to replace mysql with 
> the lighter and faster sqlite (as we are only using mysql for its full 
> text support)

I fully approve of that.  But wouldn't you have to use two database
engines? Or can sqlite use QDBM somehow?  SOrry I haven't looked at the 
link as of yet.

sri

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