Hi,

We are dealing with a large gas supplier company which has gas
distributors in cities, towns as well as remote villages. The gas
distributors may or may not have a broadband connections. They have to
synchronize their local data with central server data and also receive
latest updates from the central server.

The central headquarter systems would want to know the new customers
who have registered and assign each one a unique ID. These unique IDs
should then be sent to the local systems. Also, they would want
reports of the stock available at each distributor and the consumption
rate, so that they can plan the supply. The upload would typically be
reports of what new customers have registered, what revenue has been
collected, what is the supply backlog, etc. The data downloaded would
be rates, master info like regions, etc. Locally the application will
be on during business hours or may be running round the clock.
Connectivity to the central servers can be throughout the day or
intermittent.

The local systems should be capable of working on Win/Linux/Unix.

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2009 International Workshop on Multi-Core Computing Systems
(MuCoCoS'09)

Fukuoka, Japan, March 16-19, 2009, in conjunction with CISIS'09

<http://www.par.univie.ac.at/~pllana/mucocos09>
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Workshop Proceedings are Published by the IEEE Computer Society Press
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Context
-------

- The improvement of the processor performance by increasing the clock
rate has reached its technological limits. Increasing the number of
processor cores rather than clock rate can give better performance and
reduce problems like energy consumption, heat dissipation and design
complexity. We are witnessing the emergence of multi-core processors
in all markets from laptops and game consoles to servers and
supercomputers.

Topics of Interest
------------------

Hi,

We are dealing with a large petrol supplier company which has petrol
stations in cities, towns as well as remote villages. The petrol
stations may or may not have a broadband connections. They have to
synchronize their local data with central server data and also receive
latest updates from the central server.
They have databases at the petrol stations, but we are not sure which
DBMS is being used. What options do we have to achieve this?
Any third party tools are available for doing this?

Thanks,
Yash

The context of this question is actually from the book "C# 3.0 Design
Patterns" (Bishop).

She makes the point that one of the reasons you'd use Decorator is if
you can't change the original component class. On p. 17, she explains
a code example: "...this code deviates from the [original] pattern
laid out...there is no IComponent interface. This is perfectly
acceptable; the decorators can inherit directly from the component and
maintain an object of that class as well. ...However, this code does
realy on the original Component [declaring a particular method as
virtual.] If this is not the case, and we cannot go in and change the
Component class, an interface is necessary."

Well, if we can't change the Component class, then how can the
Component class implement a common interface? Conceptually, this is
the same thing as inheriting in this context. If you don't have
access to changing the class, you can't do it. What am I missing?

http://Mountain.googlebong.com

Elmo Thurstonson GoogleBong

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Hello,

I'm trying to make a model of a program behaviour.

I want to use an UML state diagram and the State design pattern.

The program can be in one of these states:
- Stopped
- Running
- Paused
- Safe

Independently of these states, the program can be in these two other
states:
- Local
- Remote

Moreover, the states Local and Remote are nonsense in the Stopped
state.

I didn't get all possibilities of the UML state diagram tools. However
I did these two diagrams which are not correlated :
http://www.developpez.net/forums/attachment.php?attachmentid=34463&d=1218461391
and
http://www.developpez.net/forums/attachment.php?attachmentid=34464&d=1218461408

Good analysis & thinking. Just a few
follow-up comments (thus!) here,

It is obvious that writing self-documenting
code is good. But it also seems clear we
can try to make the "self-documentedness"
of a program always a little better, almost
like a piece of fiction or movie could probably
always be improved, just a little.

Well, I guess my point was that I would rather
not have to do any inferencing or deduction
to figure out how and why it works. Code should
not be a puzzle to be solved, even though that
is often the case.

Call for Participation - ACCU 2009
April 22-25, 2009. Barcelo Oxford Hotel, Oxford, UK
http://www.accu.org/conference
Submission deadline: 20th of October 2008
Highlight: Special track on patterns, please read on
Email proposals to: Giovanni Asproni, conference@accu.org

We would like to invite you to present a session at this leading
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Leading a session is a highly rewarding experience: the lively and
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you are likely to greatly enhance your understanding of the topic you
are exploring.

I looked at some of the links and it says
there's so far not much documentation. So
I would be glad if someone has the time to
give a bit of a description on this forum.

This design pattern may be developing as
we speak into multiple different directions.

I haven't looked at the groovy Builder source-
implementation yet because I think I know
approximately what is going on. I came up with
a similar idea some years ago. In Smalltalk-
syntax it means that rather than saying something
like

output := '... ... ' .

we can more simply say:

output :=
[HTML
addComponent: [HEAD ... ]
addComponent: [BODY ... ]
]

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