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<title>Building a Stock Quoter with TAO - A Tutorial</title>
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<h3>Building a Stock Quoter with CoSMIC and DAnCE - A
Tutorial<br />
</h3>
<p>This tutorial provides a step-by-step lesson on developing
component-based distributed applications using <a href="http://www.dre.vanderbilt.edu/cosmic/">CoSMIC</a> modeling
toolkit and <a href="http://www.cs.wustl.edu/%7Eschmidt/CIAO.html">CIAO/DAnCE</a>
framework. The example application used in this tutorial is a
Stock Quoter that consists of two components; the
<em>StockDistributor</em> and the <em>StockBroker</em>. The
<em>StockDistributor</em> notifies one or more stock brokers
whenever a stock price changes. Upon receiving the notification,
the <em>StockBroker</em> fetches information about a particular
stock from the <em>StockDistributor</em>. The figure bellow shows
the application diagram. This Stock Quoter application is based
on a series of <a href="http://www.cs.wustl.edu/%7Eschmidt/report-doc.html">CORBA
component model</a> columns written by <a href="http://www.cs.wustl.edu/%7Eschmidt/">Doug Schmidt</a> and
<a href="http://www.iona.com/hyplan/vinoski/">Steve Vinoski</a>
for <a href="http://www.cuj.com">C/C++ Users Journal</a> and has
consistently been used as an example for <a href="http://www.cs.wustl.edu/%7Eschmidt/TAO.html">TAO</a>.<br />
</p>
<div style="text-align: center;">
<img alt="" src="Images/fig1.jpg" style="width: 362px; height: 193px;" /><br />
<br />
Stock Quoter application Diagram<br />
</div>
<p>This tutorial will show you how to use generic modeling
techniques <a href="http://www.dre.vanderbilt.edu/cosmic/">CoSMIC</a> to assist the
development process of CIAO applications. All the necessary steps
to build a component-based application model via <a href="http://www.dre.vanderbilt.edu/cosmic/">CoSMIC</a> toolkit are
documented here.</p>
<blockquote>
<hr />
<strong>Note:</strong><br />
1. Although the descriptor files generated by CoSMIC toolkits
are portable, the modeling environment required by CoSMIC (GME)
only supports Microsoft Windows platforms.<br />
2. The CIAO/DAnCE codes used for this tutorial can be found in
<code>%CIAO_ROOT%/docs/tutorials/Quoter/Simple</code>.<br />
3. The current tutorial is tested under GME 5.9.21, and
CosMIC 0.5.2. It will be subject to change as version of GME
and CoSMIC evolves.<br />
<hr />
</blockquote>
<strong><big>Prerequisites</big></strong><br />
<br />
Before you start, you will need the following:
<ol>
<li><strong>ACE+TAO+CIAO (Component Integraated ACE
ORB).</strong> ACE + TAO + CIAO provide the CCM infrastructure
necessary to enable the CCM-based distributed component
interaction. You can click <a href="http://download.dre.vanderbilt.edu">here</a> to download
the latest ACE + TAO + CIAO and click <a href="../../../../../ACE-Install.html">
here</a> for information on how to build ACE+TAO+CIAO.</li>
<li><strong>Generic Modeling Environment (GME).</strong> GME is
a configurable toolkit for creating domain-specific modeling
and program synthesis environments. It provides the execution
environment for CoSMIC toolkits. Click <a href="http://www.isis.vanderbilt.edu/Projects/gme/download.html">here</a>
to download GME.</li>
<li><strong>CoSMIC toolkit.</strong> Click <a href="http://www.dre.vanderbilt.edu/cosmic/">here</a> to download
the latest CoSMIC release.</li>
</ol>
<blockquote>
<hr />
<strong>Note:</strong><br />
<ol>
<li>Please use only the version of GME that the CoSMIC
package you have downloaded requires. Attempts to use earlier
or later versions may result in undefined behavior.</li>
<li>Make sure you install GME before you install CoSMIC.</li>
</ol>
<hr />
</blockquote>
<strong><a href="01.html">Getting
Started</a></strong><br />
<br />
This section describes the IDL files used by the
example and shows you how to import IDL into <a href="http://www.cs.wustl.edu/%7Eschmidt/PDF/RTAS05-PICML.pdf">PICML
(Platform-Independent Component Modeling Language)</a>; a
domain-specific modeling language which is defined using GME.
PICML is designed to help to bridge the gap between design-time
verification and model-checking tools and the deployment of
component implementations.<br />
<br />
<strong><a href="02.html">Modeling StockQuoter system with
PICML</a></strong><br />
<br />
This section describes how to model the Stock
Quoter components in PICML.<br />
<br />
<a href="03.html"><strong>Implementing Quoter components with
DAnCE</strong></a><br />
<br />
This section provides codes for the Quoter
example.<br />
<br />
<strong><a href="04.html">Running the
application</a></strong><br />
<br />
After all the components and descriptors generated
by PICML are in place. You are ready to compile and run the
application.<br />
<br />
<hr />
<address>
<a href="mailto:ming.xiong@vanderbilt.edu">Ming Xiong<br />
</a>
</address>
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