[Kde-finance-apps] SoK coding time

Tue Jun 8 10:35:17 CEST 2010

On Thu, Jun 3, 2010 at 8:58 PM, Brian Cappello <briancappello at gmail.com>wrote:

>
>
> On Thu, Jun 3, 2010 at 4:50 AM, santosh kumar <santosh.k66 at gmail.com>wrote:
>
>> exams about to be over in next  two days :D
>>
>>
>>
>> I have started with my work ,but will need sometime to chalk out the
>> schedule.
>>
>> I need some help.
>>
>> can we use  dcop Knotify to send notification from a server to an
>> invidual machine. if not can u suggest an alternative routine?
>>
>> how do u send emails to people from your appplication without using a
>> mail client ? Is it weird? I'm a novice and u have to sculpt me
>> initially.
>>
>> if this is not possible how do I use Kmail for the same?
>>
>> I am trying to go over KDevelop and cmake thing myself from random
>> sources. Can someone suggest me great sources so that I can go beyond
>> the reading phase in a couple of days.
>>
>
> This is just what's been helpful to me for my style of learning, but, if
> you haven't already done so I guess I'd just recommend that during the
> reading phase it's best to just get any standalone code running, even if
> it's not directly related to your project.
> http://techbase.kde.org/Development/Tutorials/Using_KXmlGuiWindow and the
> following 4-5 tutorials might be a good place to start. That way, if you
> don't already have it, you can at least get a better grip on how to make
> your own cmake files for your own standalone code. Then once you've
> understood how all that works, you can focus on massaging the code to better
> fit your goals.
>
> As for example code, IMO the "best" examples are usually the smallest
> programs. I found the KEuroCalc project Thomas mentioned to be very
> useful... the code is simple enough, split up as a GUI frontend and a DBus
> backend, and shows how to make cmake work with multiple
> directories/programs. Sources can be grabbed from its kde-apps page:
> http://kde-apps.org/content/show.php/keurocalc?content=26033
> When it comes to finding other examples, personally, I just browsed
> kde-apps until I found something that looked like it might have
> functionality like what I wanted, and then I dug through the sources to see
> what was under the hood. I wish I could say I knew of a better way...
>
> alvaro ,as per your specification I am keeping the source and
>> notification different from core program  so they can be customized as
>> per need.
>>
>> Bryan, I suppose you are creating a backend based on SQLlite, what all
>> fields do you plan to have ? Will you have a time stamp field too?
>>
>
> I'll probably be using a database of some sort for private internal storage
> of at least intraday and company info/stats information,
>

  well ,will that not leave the historical perspective behind?.to track the
history of a stock we must have access to past stock value too .that will
make the database cumbersome ,that is why the class  structure has to
incorporate this functionality in the initial stage only.

.

> but as far as gaining access to that information, client applications (eg
> you) will all need to call DBus "functions" (aka interfaces in DBus-speak).
> And/or maybe DBus signals/slots.
>

what functions? where are they? is someone working on them?

> How familiar are you with address spaces and the differences between
> threads and processes and inter-thread communication (ITC) versus
> inter-process communication (IPC) and all that good stuff? (If that all
> sounds esoteric that's totally cool, you don't necessarily need to know much
> about all that stuff, but knowing how much you do know might help towards
> better explanations... :)
>

I know DBus is for IPC ,I have read (just read) about threads in java and
python.

>
>> please treat me as  a novice while replying and refrain from esoteric
>> replies . Is it possible to possible to query a database so that it
>> returns a struct datatype?
>
>
> I still have a fair amount of code to crank out before I'll have a more
> accurate idea of exactly how it'll work, but, a struct seems a likely
> candidate for intraday data. (It's being worked on... shouldn't be too long
> until I at least get something functional that you can interface with
> working... ;) The way I'm thinking it'll work is the client will tell the
> backend (via DBus) that it wants to start watching a symbol. The backend
> gets the request, downloads some data and gets itself setup, and sends a
> signal to the client telling them the data for that symbol is ready. Then,
> the client can "query" the backend (via DBus) for whatever information they
> want. At least for intraday data, there will also be a way for the client to
> "register" with the backend to receive broadcasted updates for whenever a
> certain symbol's data changes.
>

 should registering be a part of the backend ?  that has to be a part of my
layer of work otherwise your's will become bothersome.

the way I see my work : the application takes the query from the client (in
form of a file or command line switch or a simple gui )  and then retrieves
from the backend and notify's the user (through a plasmoid and  Knotify ).

so may be the backend should ignore such minor details and it shouldn't be
client specific ,gee imagine 100 thousand clients , can we employ hundreds
of servers.

As for the intraday query, it will return at least this information, but in
> what exact form is still to-be-determined:
> QString? DateAndTime
> AlkValue Open
> AlkValue High
> AlkValue Low
> AlkValue Close
> AlkValue? Volume
>

that will do . order is immaterial for me at present.

>
> any help on the code front or any page
>> suggestion?
>>
>
>>  I am reading 12 hours next couple of days so if anyone wants me to
>> go through some stuff they think is useful kindly recommend.
>>
>>  there must be some similar applications (which gets some input from
>> an user ,queries a database, do some processing and sends some
>> notifications,mails ).It will be great if someone suggest me one.
>>
>> want ot get something working ,that is the biggest motivator ,u see.
>>
>> waitng for responses
>>
>> your's truely (humbly if u like it that way)
>> santosh kumar
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>> https://mail.kde.org/mailman/listinfo/kde-finance-apps
>>
>
>
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>

-- 
encore
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