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Date: Fri, 27 May 2016 18:34:17 +0300
Message-ID: <CAMegbc+P6WHza4kk=sRoMOF_m_X35E-ppV8c=JvB0Fysso3ykw@mail.gmail.com>
Subject: Re: Simulating Graph Dependencies With Ignite
From: Alexei Scherbakov <alexey.scherbakoff@gmail.com>
To: user@ignite.apache.org
Content-Type: multipart/alternative; boundary=001a114a8a52d254180533d4a332
archived-at: Fri, 27 May 2016 15:34:30 -0000

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Hi,

You can store cell dependencies as Ignite's data grid of

IgniteCache<Cell, Cell> cells = ...

where relation between key and value is interpreted like: value depends on
key.

When the cell is updated you do the following:

Cell cell = updated;
do {
     recalculate(cell);
} while( (cell = cells.get(cell)) != null);

Did it help ?


2016-05-27 16:49 GMT+03:00 pragmaticbigdata <amits.84@gmail.com>:

> Hello,
>
> I have started exploring apache ignite by following the introductory
> videos.
> It looks quite promising and I wanted to understand if it will be well
> suited for the use case I brief out below. If so, I would be glad to hear
> out on how could I approach it
>
> The use case is
>
> We are trying to implement cell level dependencies within multiple tables.
> It's similar to the functionality excel offers just that in our case it
> could span across multiple tables. Imagine multiple cells in an excel
> worksheet having interdependent formula's where updating a value in one
> cell
> causes another cell value to change and that cell update causes another
> cell
> value to update and so on and so forth. It is kind of graph of dependencies
> that determines what is the next row cell that needs to be updated.
>
> With apache ignite, what api's and data structures could I use to maintain
> a
> graph of inter-dependencies between multiple tables? Note that these would
> be metadata dependencies and not data.
>
> I would appreciate to get inputs on this.
>
> Thanks,
> Amit
>
>
>
> --
> View this message in context:
> http://apache-ignite-users.70518.x6.nabble.com/Simulating-Graph-Dependencies-With-Ignite-tp5282.html
> Sent from the Apache Ignite Users mailing list archive at Nabble.com.
>


-- 

Best regards,
Alexei Scherbakov

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Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Hi,<div><br></div><div>You can store cell dependencies as =
Ignite&#39;s data grid of</div><div><br></div><div>IgniteCache&lt;Cell, Cel=
l&gt; cells =3D ...</div><div><br></div><div>where relation between key and=
 value is interpreted like: value depends on key.</div><div><br></div><div>=
When the cell is updated you do the following:</div><div><br></div><div>Cel=
l cell =3D updated;</div><div>do {</div><div>=C2=A0 =C2=A0 =C2=A0recalculat=
e(cell);</div><div>} while( (cell =3D cells.get(cell)) !=3D null);</div><di=
v><br></div><div>Did it help ?</div><div><br></div><div><br></div><div><br>=
</div><div><br></div></div><div class=3D"gmail_extra"><br><div class=3D"gma=
il_quote">2016-05-27 16:49 GMT+03:00 pragmaticbigdata <span dir=3D"ltr">&lt=
;<a href=3D"mailto:amits.84@gmail.com" target=3D"_blank">amits.84@gmail.com=
</a>&gt;</span>:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0=
 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br>
<br>
I have started exploring apache ignite by following the introductory videos=
.<br>
It looks quite promising and I wanted to understand if it will be well<br>
suited for the use case I brief out below. If so, I would be glad to hear<b=
r>
out on how could I approach it<br>
<br>
The use case is<br>
<br>
We are trying to implement cell level dependencies within multiple tables.<=
br>
It&#39;s similar to the functionality excel offers just that in our case it=
<br>
could span across multiple tables. Imagine multiple cells in an excel<br>
worksheet having interdependent formula&#39;s where updating a value in one=
 cell<br>
causes another cell value to change and that cell update causes another cel=
l<br>
value to update and so on and so forth. It is kind of graph of dependencies=
<br>
that determines what is the next row cell that needs to be updated.<br>
<br>
With apache ignite, what api&#39;s and data structures could I use to maint=
ain a<br>
graph of inter-dependencies between multiple tables? Note that these would<=
br>
be metadata dependencies and not data.<br>
<br>
I would appreciate to get inputs on this.<br>
<br>
Thanks,<br>
Amit<br>
<br>
<br>
<br>
--<br>
View this message in context: <a href=3D"http://apache-ignite-users.70518.x=
6.nabble.com/Simulating-Graph-Dependencies-With-Ignite-tp5282.html" rel=3D"=
noreferrer" target=3D"_blank">http://apache-ignite-users.70518.x6.nabble.co=
m/Simulating-Graph-Dependencies-With-Ignite-tp5282.html</a><br>
Sent from the Apache Ignite Users mailing list archive at Nabble.com.<br>
</blockquote></div><br><br clear=3D"all"><div><br></div>-- <br><div class=
=3D"gmail_signature" data-smartmail=3D"gmail_signature"><div dir=3D"ltr"><d=
iv><div dir=3D"ltr"><div dir=3D"ltr"></div><div><div dir=3D"ltr"><br>Best r=
egards,<br></div><div>Alexei Scherbakov<br></div></div></div></div></div></=
div>
</div>

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