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<a href="http://community.jboss.org/index.jspa" style="text-decoration: none; color: #E1E1E1">JBoss Community</a></h1>
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Thoughts on filesystem action driven hot deployment
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reply from <a href="http://community.jboss.org/people/david.lloyd%40jboss.com">David Lloyd</a> in <i>JBoss AS7 Development</i> - <a href="http://community.jboss.org/message/560026#560026">View the full discussion</a>
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<div class="jive-rendered-content"><blockquote class="jive-quote"><p>Dimitris Andreadis wrote:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><blockquote class="jive-quote"><p>Brian Stansberry wrote:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Is it easier just to copy the exploded deployment and have the scanner keep the copy in sync. I've done that for farming; it's not such a big deal. I'm starting to feel like not doing that is leading to a lot of internal complication (e.g. needing to keep track of multiple locations where content is stored.)</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>That doesn't solve the atomic move problem, but maybe if people can't do atomic moves they should use the filesystem as their deployment API. <span> :) </span></p></blockquote><p>If the cost of deep copying and keeping in synch the exploded archive is not that high, that would solve the undeploy problems. Although I would personally leave the option to the user whether to disable deep copy of deployments, either globally (system property) or per deployment (e.g. META-INF/jboss-no-deep-copy).</p></blockquote><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Actually this doesn't really solve the problem at all.  Say you start deleting your deployment.  At what point does the scanner decide that you're not updating your deployment by removing files, you're actually deleting it?  The same problem basically exists except now you have the additional complication of having to detect and sync up changes.  My opinion remains: using delete to signal undeploy should not be done, especially for exploded deployments.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thus, I don't see any reason to copy exploded deployments.  I just don't think it buys us anything.</p></div>
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