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Date: Wed, 15 Feb 2012 10:13:20 +0100
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Subject: Re: DM modularization
From: "Raffaele P. Guidi" <raffaele.p.guidi@gmail.com>
To: directmemory-dev@incubator.apache.org
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Well josql could be replaced by lambdaj - with exactly the same problems at
all levels but more fanciness - or by plain for loops and if statements.
This can be the best option if requirements for eviction are clear and not
changing too often.

Ciao,
    R
Il giorno 15/feb/2012 08:51, "Simone Tripodi" <simonetripodi@apache.org> ha
scritto:

> Hello!
>
> I don't have a strong idea ATM how to replace the Josql, if you
> already have some hints I would be glad to do the legwork :)
>
> We're on the same boat, I thought on keeping the default Java
> serializer as well in the core module - as a second step, we could
> even think in a ServiceProvider based factory (find between services,
> use the default if no one has been found)
>
> +1 to Olivier's idea - I see the REST layer as an external module on
> top of the core... did you think about the same or had a different
> vision?
>
> Have a nice day, all the best!
> -Simo
>
> http://people.apache.org/~simonetripodi/
> http://simonetripodi.livejournal.com/
> http://twitter.com/simonetripodi
> http://www.99soft.org/
>
>
>
> On Wed, Feb 15, 2012 at 8:23 AM, Raffaele P. Guidi
> <raffaele.p.guidi@gmail.com> wrote:
> > regarding the formatting thing - I honestly don't remember why I did the
> > choice, di as you think best. Josql is used at the core level to select
> > items to purge in the background, I already pointed out it can also be a
> > performance bottleneck but it was easy to correct with ad-hoc code.
> > Regarding serializers - yes it should be done but I suggest to keep the
> > default one in the core. The java serializer is a bit too slow to be the
> > default one, IMHO. All other ideas and news are great, including the
> > memcached protocol, which I already investigated long ago (there's a java
> > me cached server with pluggable implementations somewhere in google code
> > that is a good starting point) and the fact that you'll be able to
> leverage
> > DM in some ways.
> >
> > Ciao,
> >    R
> > Il giorno 14/feb/2012 22:29, "Simone Tripodi" <simonetripodi@apache.org>
> ha
> > scritto:
> >
> >> Hi all guys,
> >>
> >> I've finally got the chance - because I also have the need - to do
> >> some serious work on DM - now setting up the environment, experiencing
> >> the following issues and also got following considerations (some of
> >> them already afforded but discussions where to nowhere):
> >>
> >> disclaimer: I am not an OSGi guru, but I've been a modularization
> >> advocate time before OSGi got popularity, so I would like to apply the
> >> same approach as well:
> >>
> >>  * serializers: all serializers are included by default, I am
> >> convinced that protostuff serializer can could be extracted as a
> >> separated module and maybe among other 3rd parties serializers, such
> >> as Kryo <http://code.google.com/p/kryo/>, ASF Thrift
> >> <http://thrift.apache.org/> and Avro <http://avro.apache.org/>, and
> >> the newer Message Pack <http://msgpack.org/> - users could plug their
> >> preferred serializer depending on their taste/needs/...
> >>
> >>  * net.sf.josql:gentlyweb-utils:1.5 artifact not found - I did a
> >> little research and found it on <http://josql.sourceforge.net/> -
> >> while the feature of having an embedded query language is really cool,
> >> IMHO it could be part of an auxiliary module. I mean, basic query
> >> system must be supported by combining objects (and fluent APIs could
> >> help) but I'm not fully convinced on having it as foundation of our
> >> core module...
> >>
> >> A side question for Raf: I am not aware about performances, but why
> >> did you prefer j.u.Formatter.format( messagePattern, Object... args
> >> ).toString() over String.format( messagePattern, Object... args ) ?
> >> I extensively used the j.u.Formatter in Commons-Digester3 but for
> >> chaining more than one format in the same message, but I didn't notice
> >> the benefit of using it for single shot... TIA!
> >>
> >> As you can see, my proposal is having a minimal DM core, with less
> >> dependencies as possible, that can be easily enriched with aux
> >> modules...
> >>
> >> please provide your feedbacks, I have some time/energy to put on DM
> >> and glad to do it!
> >> TIA,
> >> -Simo
> >>
> >> http://people.apache.org/~simonetripodi/
> >> http://simonetripodi.livejournal.com/
> >> http://twitter.com/simonetripodi
> >> http://www.99soft.org/
> >>
>

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