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| </script><!--End Google Analytics code--></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">5. Overview of the Virgo Kernel and User Region</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch04s06.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="ch05s02.html">Next</a></td></tr></table><hr></div><div class="chapter" lang="en"><div class="titlepage"><div><div><h2 class="title"><a name="kernel-regions-overview"></a>5. Overview of the Virgo Kernel and User Region</h2></div></div></div><p>Conceptually, VWS can be divided into two separate subsystems, one of which actually encompases the other:</p><div class="itemizedlist"><ul type="disc"><li>The <span class="emphasis"><em>kernel</em></span>, which is the heart of VWS. It makes up most of the VWS, except for the part that supports Web applications. In other words, the kernel provides full OSGi modular support for your applications, as long as they are not Web-based. | |
| <p>See <a class="link" href="ch05.html#kernel-overview" title="5.1 The Virgo Kernel">The Virgo Kernel</a> for additional information.</p></li><li>The <span class="emphasis"><em>user region</em></span> is the subsystem that manages user applications. It deliberately isolates the kernel from both your applications and those of the VWS itself, such as the Admin Console, making it much easier for you to administer VWS. | |
| <p>See <a class="link" href="ch05s02.html" title="5.2 The User Region">The User Region</a> for additional information.</p></li></ul></div><p>When you download and install Virgo Web Server you get both the kernel and web server support (configured in the user region). You can also <a class="ulink" href="http://www.eclipse.org/virgo/download/" target="_top">download and use the kernel</a> on its own if you do not plan on deploying Web applications. </p><p>The following graphic shows how the kernel and user region make up VWS:</p><table border="0" summary="manufactured viewport for HTML img" cellspacing="0" cellpadding="0" width="885"><tr style="height: 805px"><td><img src="images/kernel-user-region.png" width="885"></td></tr></table><div class="section" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="kernel-overview"></a>5.1 The Virgo Kernel</h2></div></div></div><p> | |
| The Virgo Kernel encapsulates almost all of VWS except for the deployment of Web applications. In sum, the kernel provides the following VWS features: | |
| </p><div class="itemizedlist"><ul type="disc"><li><p> | |
| Deployment of non-Web artifacts, such as OSGi bundles, PARs, plans, | |
| and configuration artifacts. | |
| </p></li><li><p> | |
| Local and hosted repositories | |
| </p></li><li><p> | |
| Scoping | |
| </p></li><li><p> | |
| Hot deployment | |
| </p></li><li><p> | |
| User region | |
| </p></li><li><p> | |
| Auto-provisioning | |
| </p></li><li><p> | |
| System and application tracing and dump support | |
| </p></li><li><p> | |
| Spring beans and Spring DM support | |
| </p></li></ul></div><p>See <a class="link" href="ch11.html" title="11. Configuration">Configuring VWS</a> for details about configuring the kernel to better suit your environment. </p></div></div><!--Begin LoopFuse code--><script src="http://loopfuse.net/webrecorder/js/listen.js" type="text/javascript"></script><script type="text/javascript"> | |
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