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Apache Lucene - Building and Installing the Basic Demo
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PDF</a>
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<h1>
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Apache Lucene - Building and Installing the Basic Demo
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</h1>
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<div id="minitoc-area">
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<ul class="minitoc">
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<li>
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<a href="#About this Document">About this Document</a>
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</li>
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<li>
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<a href="#About the Demos">About the Demos</a>
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</li>
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<li>
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<a href="#Indexing Files">Indexing Files</a>
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</li>
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<li>
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<a href="#Deploying the Demos">Deploying the Demos</a>
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</li>
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<li>
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<a href="#Configuration">Configuration</a>
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</li>
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<li>
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<a href="#Running the Demos">Running the Demos</a>
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</li>
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<li>
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<a href="#About the code...">About the code...</a>
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</li>
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</ul>
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</div>
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<a name="N10013"></a><a name="About this Document"></a>
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<h2 class="boxed">About this Document</h2>
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<div class="section">
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<p>
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This document is intended as a "getting started" guide to installing and running the Lucene
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web application demo. This guide assumes that you have read the information in the previous two
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examples. We'll use Tomcat as our reference web container. These demos should work with nearly any
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container, but you may have to adapt them appropriately.
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</p>
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</div>
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<a name="N1001C"></a><a name="About the Demos"></a>
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<h2 class="boxed">About the Demos</h2>
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<div class="section">
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<p>
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The Lucene Web Application demo is a template web application intended for deployment on Tomcat or a
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similar web container. It's NOT designed as a "best practices" implementation by ANY means. It's
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more of a "hello world" type Lucene Web App. The purpose of this application is to demonstrate
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Lucene. With that being said, it should be relatively simple to create a small searchable website
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in Tomcat or a similar application server.
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</p>
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</div>
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<a name="N10025"></a><a name="Indexing Files"></a>
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<h2 class="boxed">Indexing Files</h2>
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<div class="section">
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<p> Once you've gotten this far you're probably itching to go. Let's start by creating the index
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you'll need for the web examples. Since you've already set your CLASSPATH in the previous examples,
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all you need to do is type:
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<pre>
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java org.apache.lucene.demo.IndexHTML -create -index {index-dir} ..
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</pre>
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You'll need to do this from a (any) subdirectory of your <span class="codefrag">{tomcat}/webapps</span> directory
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(make sure you didn't leave off the <span class="codefrag">..</span> or you'll get a null pointer exception).
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<span class="codefrag">{index-dir}</span> should be a directory that Tomcat has permission to read and write, but is
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outside of a web accessible context. By default the webapp is configured to look in
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<span class="codefrag">/opt/lucene/index</span> for this index.
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</p>
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</div>
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<a name="N1003D"></a><a name="Deploying the Demos"></a>
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<h2 class="boxed">Deploying the Demos</h2>
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<div class="section">
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<p>Located in your distribution directory you should see a war file called
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<span class="codefrag">luceneweb.war</span>. If you're working with a Subversion checkout, this will be under the
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<span class="codefrag">build</span> subdirectory. Copy this to your <span class="codefrag">{tomcat-home}/webapps</span> directory.
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You may need to restart Tomcat. </p>
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</div>
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<a name="N1004F"></a><a name="Configuration"></a>
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<h2 class="boxed">Configuration</h2>
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<div class="section">
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<p> From your Tomcat directory look in the <span class="codefrag">webapps/luceneweb</span> subdirectory. If it's not
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present, try browsing to <span class="codefrag">http://localhost:8080/luceneweb</span> (which causes Tomcat to deploy
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the webapp), then look again. Edit a file called <span class="codefrag">configuration.jsp</span>. Ensure that the
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<span class="codefrag">indexLocation</span> is equal to the location you used for your index. You may also customize
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the <span class="codefrag">appTitle</span> and <span class="codefrag">appFooter</span> strings as you see fit. Once you have finished
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altering the configuration you may need to restart Tomcat. You may also wish to update the war file
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by typing <span class="codefrag">jar -uf luceneweb.war configuration.jsp</span> from the <span class="codefrag">luceneweb</span>
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subdirectory. (The -u option is not available in all versions of jar. In this case recreate the
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war file).
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</p>
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</div>
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<a name="N10070"></a><a name="Running the Demos"></a>
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<h2 class="boxed">Running the Demos</h2>
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<div class="section">
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<p>Now you're ready to roll. In your browser set the url to
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<span class="codefrag">http://localhost:8080/luceneweb</span> enter <span class="codefrag">test</span> and the number of items per
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page and press search.</p>
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<p>You should now be looking either at a number of results (provided you didn't erase the Tomcat
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examples) or nothing. If you get an error regarding opening the index, then you probably set the
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path in <span class="codefrag">configuration.jsp</span> incorrectly or Tomcat doesn't have permissions to the index
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(or you skipped the step of creating it). Try other search terms. Depending on the number of items
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per page you set and results returned, there may be a link at the bottom that says <b>More
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Results>></b>; clicking it takes you to subsequent pages. </p>
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</div>
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<a name="N10088"></a><a name="About the code..."></a>
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<h2 class="boxed">About the code...</h2>
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<div class="section">
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<p>
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If you want to know more about how this web app works or how to customize it then <a href="demo4.html">read on>>></a>.
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</p>
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</div>
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</div>
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Copyright ©
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2006 <a href="http://www.apache.org/licenses/">The Apache Software Foundation.</a>
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