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VFS3 and symlinks
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reply from <a href="http://community.jboss.org/people/SkyBeam">Rainer Meier</a> in <i>JBoss Microcontainer Development</i> - <a href="http://community.jboss.org/message/549517#549517">View the full discussion</a>
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<div class="jive-rendered-content"><p>It seems my previous analysis was not entirely correct.</p><p><span>I just noticed that I did not install jboss-vfs.jar in version 2.2.0.GA but instead I've installed version 2.2.0.M4 from the official Maven repository (</span><a class="jive-link-external-small" href="http://repository.jboss.org/maven2/org/jboss/jboss-vfs/2.2.0.M4/" target="_blank">http://repository.jboss.org/maven2/org/jboss/jboss-vfs/2.2.0.M4/</a><span>). Then I found out that version 2.2.0.GA can be found at </span><a class="jive-link-external-small" href="http://repository.jboss.org/maven2-brew/org/jboss/jboss-vfs/2.2.0.GA/" target="_blank">http://repository.jboss.org/maven2-brew/org/jboss/jboss-vfs/2.2.0.GA/</a><span> (I hope this is the correct location). Just wondering why it's not in the official maven2 location.</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>After installing this version and setting the default vfs.xml configuration and adding the -Djboss.vfs.forceCanonical=true startup parameter it seems to work fine. Even if I use the jboss.server.home.url property in vfs.xml.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Here's my vfs.xml property for reference:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-xml">
<span class="jive-xml-tag"><?xml version="1.0" encoding="UTF-8"?></span><span class="jive-xml-comment"><!--   The JBossVFS initializer configuration.--><span class="jive-xml-tag"><deployment xmlns="urn:jboss:bean-deployer:2.0"></span>  <span class="jive-xml-tag"><bean name="VFSCache"></span>    <span class="jive-xml-tag"><constructor factoryClass="org.jboss.virtual.spi.cache.VFSCacheFactory" factoryMethod="getInstance"></span>      <!-- Use the CombinedVFSCache implementation --></span>      <span class="jive-xml-tag"><parameter></span>org.jboss.virtual.plugins.cache.CombinedVFSCache<span class="jive-xml-tag"></parameter></span>    <span class="jive-xml-tag"></constructor></span>    <span class="jive-xml-tag"><start ignored="true"/></span>    <span class="jive-xml-tag"><property name="permanentRoots"></span>      <span class="jive-xml-tag"><map keyClass="java.net.URL" valueClass="org.jboss.virtual.spi.ExceptionHandler"></span>        <span class="jive-xml-tag"><entry></span>          <span class="jive-xml-tag"><key></span>${jboss.lib.url}<span class="jive-xml-tag"></key></span>          <span class="jive-xml-tag"><value></span><span class="jive-xml-tag"><null/></span><span class="jive-xml-tag"></value></span>        <span class="jive-xml-tag"></entry></span>        <span class="jive-xml-tag"><entry></span>          <span class="jive-xml-tag"><key></span>${jboss.common.lib.url}<span class="jive-xml-tag"></key></span>          <span class="jive-xml-tag"><value></span><span class="jive-xml-tag"><inject bean="VfsNamesExceptionHandler"/></span><span class="jive-xml-tag"></value></span>        <span class="jive-xml-tag"></entry></span>        <span class="jive-xml-tag"><entry></span>          <span class="jive-xml-tag"><key></span>${jboss.server.lib.url}<span class="jive-xml-tag"></key></span>          <span class="jive-xml-tag"><value></span><span class="jive-xml-tag"><inject bean="VfsNamesExceptionHandler"/></span><span class="jive-xml-tag"></value></span>        <span class="jive-xml-tag"></entry></span>        <span class="jive-xml-tag"><entry></span>          <span class="jive-xml-tag"><key></span>${jboss.server.home.url}deploy<span class="jive-xml-tag"></key></span>          <span class="jive-xml-tag"><value></span><span class="jive-xml-tag"><inject bean="VfsNamesExceptionHandler"/></span><span class="jive-xml-tag"></value></span>        <span class="jive-xml-tag"></entry></span>        <span class="jive-xml-tag"><entry></span>          <span class="jive-xml-tag"><key></span>${jboss.server.home.url}farm<span class="jive-xml-tag"></key></span>          <span class="jive-xml-tag"><value></span><span class="jive-xml-tag"><inject bean="VfsNamesExceptionHandler"/></span><span class="jive-xml-tag"></value></span>        <span class="jive-xml-tag"></entry></span>      <span class="jive-xml-tag"></map></span>    <span class="jive-xml-tag"></property></span>    <span class="jive-xml-tag"><property name="realCache"></span>      <span class="jive-xml-tag"><bean/></span>    <span class="jive-xml-tag"></property></span>  <span class="jive-xml-tag"></bean></span>  <span class="jive-xml-tag"><bean name="VfsNamesExceptionHandler"></span>    <span class="jive-xml-tag"><constructor></span>      <span class="jive-xml-tag"><parameter></span>sqljdbc.jar<span class="jive-xml-tag"></parameter></span>    <span class="jive-xml-tag"></constructor></span>  <span class="jive-xml-tag"></bean></span><span class="jive-xml-tag"></deployment></span>
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Reading this thread it looks to me that some people seem to be concerned about possible performance drop when using/enforcing canonical names. Is this likely to be a real issue or just a small impact?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Personally I think it will not be a big issue at runtime. Maybe a small impact during startup and deployment when canonical paths of the files need to be looked up. But after deployment there should not be much canonical path lookups required.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>What do you think about? Or are there any benchmarks done with or without this option being enabled?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I am running JBoss 5.1.0 on Solaris 10 x86 (if this is relevant).</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks again for your help.</p></div>
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<p style="margin: 0;">Reply to this message by <a href="http://community.jboss.org/message/549517#549517">going to Community</a></p>
<p style="margin: 0;">Start a new discussion in JBoss Microcontainer Development at <a href="http://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2115">Community</a></p>
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