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<h1>12. Web Application Development</h1>
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<h2>12.9. Deploying JSP Applications</h2>
<p>The Virtuoso server with Java hosting support can be used to execute
JSP pages, however, Virtuoso requires a JSP container engine first. Jakarta
provide such an engine that can be hosted inside Virtuoso with Java support.
This section describes how JSP's can be executed using Jakarta Tomcat JSP
implementation.</p>
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<td>Figure: 12.9.1. The HTTP JSP handler using Jakarta Tomcat</td>
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<h3>12.9.2. Environment Setup & Verification</h3>
<p>The following components are required:</p>
<ul>
<li>Java SDK (or runtime only) needs to be installed. Version 1.2 or later.</li>
<li>Jakarta Tomcat package must be installed and configured. This can
be obtained from the <a href="http://jakarta.apache.org/tomcat/">Jakarta project site</a>
(http://jakarta.apache.org/tomcat/)</li>
</ul>
<p>The virtuoso.ini file must edited to including the following settings in the
<span class="computeroutput">[Parameters]</span> section:</p>
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<pre class="programlisting">.....
JavaClasspath = <jdk install dir>/lib/tools.jar:<tomcat install dir>/bin/bootstrap.jar
JavaVMOption1 = -Djava.endorsed.dirs=<tomcat install dir>/bin:<tomcat install dir>/common/endorsed
JavaVMOption2 = -Dcatalina.base=<tomcat install dir>
JavaVMOption3 = -Dcatalina.home=<tomcat install dir>
JavaVMOption4 = -Djava.io.tmpdir=<tomcat install dir>/temp
.....</pre>
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<div class="note">
<div class="notetitle">Note:</div>
<p>The above has been tested for the jakarta-tomcat-4.1.18 distribution
only. Setting may vary for any other versions of Jakarta Tomcat, in which case we
advise you consult the Tomcat documentation.</p>
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<p>Run the <span class="computeroutput">virtuoso-*-javavm*-t</span> binary,
The Virtuoso server that includes Java hosting.</p>
<p>Start the Jakarta Tomcat server inside virtuoso server process using the
following command from ISQL:</p>
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<pre class="programlisting">
SQL> java_call_method ('org.apache.catalina.startup.BootstrapService', null, 'main', 'V',
vector ('[Ljava/lang/String;', vector ('start')));
</pre>
</div>
<p>
In order to invoke the above command automatically at server startup you might
put it in the autoexec.isql init script.
</p>
<p>Make a virtual directory for accessing JSP server, here is an example:</p>
<div>
<pre class="programlisting">vhost_define (lpath=>'/tomcat',ppath=>'http://localhost:8080/');</pre>
</div>
<p>Verify that your installations are correct by pointing your web browser
of choice to <span class="computeroutput">http://localhost:8890/tomcat/</span>
(assuming you are working on your local machine). Run some of JSP examples
provided with Tomcat distribution to verify that they are executed without errors.</p>
<div class="note">
<div class="notetitle">Note:</div>
<p>For debugging purposes you may run the virtuoso-*-javavm*-t server with
foreground option to receive Java error messages, if any occur.</p>
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<div class="tiptitle">See Also:</div>
<p>
<a href="inprocess.html">In-Process Data Access Client</a>
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