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README.html
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<h3>Instructions to build, deploy and run JEST demo</h3>
<hr>
<dl>
<dt><b>Step 1: Download OpenJPA binary</b></dt>
<dd> OpenJPA binaries are available from OpenJPA
<a href="http://openjpa.apache.org/downloads.html" target="_blank">download site</a>.
The nightly snapshots of version <tt>2.2.0</tt> that includes JEST are ready for
<a href="https://repository.apache.org/snapshots/org/apache/openjpa/apache-openjpa/2.2.0-SNAPSHOT/"
target="_blank">download</a> at lower half of the page.
</dd>
<br>
<dt><b>Step 2: Get the JEST demo application</b></dt>
<dd> A simple servlet based application is used to demonstrate JEST usage. This simple
application merely defines a persistent unit with two persistent classes: <tt>Actor</tt>
and <tt>Movie</tt>. The source code, persistence unit descriptor
<tt>META-INF/persistence.xml</tt>, deployment descriptor <tt>WEB-INF/web.xml</tt>
and Ant-based build script are available from OpenJPA svn repository.<br>
Checkout these source files from the repository to a local directory.
The following command:<br>
<code>$ svn co https://svn.apache.org/repos/asf/openjpa/trunk/openjpa-examples/jest .</code><br>
will bring the code to the current directory, for example.
</dd>
<br>
<dt><b>Step 3: Configure for your environment</b></dt>
<dd>
The persistence unit descriptor <tt>META-INF/persistence.xml</tt> for the example application
needs to be configured with database details. By default, it is configured for a MySQL database.
<br>
The build script requires the location of openjpa library and servlet API library jar.
Edit <tt>build.properties</tt> file to set the variables to locations appropriate for
your environment.
</dd>
<br>
<dt><b>Step 4: Build the application</b></dt>
<dd>
Just run good old Ant.<br>
<code> $ ant</code> </br>
The build script <tt>buid.xml</tt> will compile few Java classes of the application, enhance
the persistent classes and package them into a web archive <tt>demo.war</tt> for deployment.
<br>
The deployment descriptor <tt>WEB-INF/web.xml</tt> for this web archive specifies two servlets:
one for this simple application and the other is JEST servlet. It may be instructive to take a
look at the <tt>WEB-INF/web.xml</tt> to see how JEST is deployed.
<br>
The web archive packages the openjpa library as well in <tt>WEB-INF/lib</tt>. You may prefer
other deployment options such as placing openjpa library in a shared library of your favorite
application server or servlet container. You do need to modify the build script in that case.
</dd>
<br>
<dt><b>Step 5: Deploy the web archive</b></dt>
<dd>
Once the web archive is ready, deploy it in an application server or servlet container by
following standard practice. Needless to say, the database driver specified in
<tt>META-INF/persistence.xml</tt> should also be available in the deployment environment.
</dd>
<br>
<dt><b>Step 6: Browse with JEST</b></dt>
<dd>
Once the web archive has been deployed, you can verify by visiting the home page (and the only page)
of the sample application in your browser<br>
<code>http://localhost:8080/demo/</code> <br>
The context path of the deployed servlet is <tt>demo</tt> as you may have noticed in <tt>WEB-INF/web.xml</tt>.
The JEST servlet is just next door at<br>
<code>http://localhost:8080/demo/jest/</code> <br>
<span class="warn">notice the trailing forward slash in the URL above</span><br>
Now you should see JEST home page with colorful icons. Enjoy browsing!
</dd>
</dl>
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