[SqueakDBX] About ports

[Mariano Martinez Peck]

Ok...Last night I commited all of these changes :)

So, you are now able to start when you can/want.

If you have questions or whatever, please ask here.

Best,

Mariano

On Tue, Oct 6, 2009 at 5:49 PM, Mariano Martinez Peck <marianopeck at gmail.com
> wrote:

>
>
> On Tue, Oct 6, 2009 at 1:18 PM, Juan <smalltalker.marcelo at gmail.com>wrote:
>
>> Mariano folks
>>
>>
>> On Tue, Oct 6, 2009 at 7:00 AM, Mariano Martinez Peck
>> <marianopeck at gmail.com> wrote:
>> > Hi folks: There is some interest in porting SqueakDBX to different
>> > Smalltalks. Jan Vrany wants to port it to Smalltalk/X and Marcelo Cortez
>> to
>> > Dolphin. So, the idea is to discuss here the necessary things I should
>> > modify so that this task is easier for you.
>> >
>> > I have been talking with Jan in ESUG and he found a couple of things I
>> > should do. In addition, I already did the stable release, so I can break
>> > whatever I want :)
>> >
>> > About the code, I will do these things:
>>
>> >
>> > 1) Create the abstract class SqueakDBXSmalltalkDialect with all of the
>> > messages like self subclassResponsibility. This class will be in the
>> core.
>>
>> like template pattern?.
>>
>
> yes
>
>
>>
>> >
>> > 2) Create a package in my monticello repo called
>> SqueakDBX-Dialect-Squeak
>> > and I will create there the class SqueakDBXSqueakDialect (subclass of
>> > SqueakDBXSmalltalkDialect ) . Now, for Squeak and Pharo users they will
>> need
>> > not only the core, but also this package. If you want to put here
>> packages
>> > like SqueakDBX-Dialect-SmalltalkX or SqueakDBX-Dialect-Dolphin, there is
>> no
>> > problem. But I don't know if this is useful for you.
>> >
>> Dolphin don't support monticello, changeset is more appropiated. i think.
>>
>
> Ok. We can create a changeset instead of monticello
>
>
>>
>> > 3) FFI calls. This is dialect dependent, but the current design is
>> perfect
>> > for this :)
>> > I will keep the class abstract class OpenDBX  in the core and that will
>> be
>> > the API. As you can see there are all the messages with a  self
>> > subclassResponsibility. I will then move my current subclasses of
>> OpenDBX to
>> > the package SqueakDBX-Dialect-Squeak.
>> > Then, what you should to in your dialects is to create a subclass of it
>> and
>> > use that. See the message OpenDBX class>>ffiImplementationForOS
>>
>> ok.
>>
>> >
>> > 4) WeakRegistry and GC: As you may know, we keep the connections in the
>> > WeakRegistry so that we can release the database connection when the GC
>> > collects a DBXConnection object.
>> > But this, again, is dialect dependent. So, the piece of code that was
>> doing
>> > this, now it will delegate to the current SqueakDBXSmalltalkDialect
>> > subclass. In my case it will be SqueakDBXSqueakDialect but in your case
>> it
>> > will be other.
>> >
>> Dolphin don't have weak collections.
>>
>
> Ok, but there is a way you can register an object somewhere so that the GC
> send a particular message to it when it is being garbage collected?
>
>
>
>>
>> > 5) Now, all the things that are dialect specific should be in
>> > SqueakDBXSmalltalkDialect and subclasses.
>> >
>> > 6) The core is thought in an ANSI Smalltalk. So, it will be difficult if
>> for
>> > every message or class you don't have in your dialect I have to change
>> > something. That would be part of the port work :)   Anyway, we can
>> discuss
>> > each of these situations and evaluate what to do.
>> >
>> >
>> > Now, about the procedure, as I talk with Marcelo, I think the best way
>> to do
>> > this is to do something like TDD:
>> >
>> > - First you port the tests
>> > - You port the rests of the things until the tests are green :)
>> Yes agree ,then refactoring for Dialect's support/
>>
>> in shot:
>> make it works.( green test)
>> refactoring ( plugability of dialects)
>>
>
> ok, but the idea is: if you will be the maintainer of the port of SqueakDBX
> to another dialect, it would be excellent if this port takes the less time
> as possible. If you have to change a lot, you won't want to do more ports
> anymore hahaha.
>
>
>> make run faster.
>>
>> Best
>> Mdc
>>
>>
>> >
>> > What do you think about this?
>> >
>> > Best,
>> >
>> > Mariano
>> >
>> >
>> >
>> >
>> >
>> >
>> > _______________________________________________
>> > SqueakDBX mailing list
>> > SqueakDBX at lists.squeakfoundation.org
>> > http://lists.squeakfoundation.org/mailman/listinfo/squeakdbx
>> >
>> >
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>>
>
>
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