October 2007
Intermediate to advanced
496 pages
16h 50m
English
Content preview from Tomcat: The Definitive Guide, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Hot Deployment
If you need to deploy and undeploy your webapp without needing to restart the Tomcat JVM in order for the deployment and undeployment to take effect, you want "Hot Deployment." In this section, we focus on local filesystem hot deployment, where everything happens on one machine, as opposed to remote hot deployment, where you hot deploy a webapp from one machine to another machine running Tomcat. For remote hot deployment, you should use the Manager webapp, detailed later in this chapter.
In the "Hosts" section, earlier in this chapter, we showed you how to
configure your Host for hot deployment (explicitly set
autoDeploy="true" and deployOnStartup= "false" on your Host). Once
you have that set, you may hot deploy your webapps into that Host in the following ways:
Create a
<Context>container XML element in your server.xml file, nested within theHostthat has hot deployment enabled.Copy your web application's WAR file into your hot deployment-enabled
Host'sappBaseand Tomcat will deploy it and start it up.Create a context XML fragment file that points to the webapp's unpacked directory or WAR file and drop the context XML fragment file into the CATALINA_HOME/conf/
[EngineName]/[HostName]/ directory.
If you're not placing a context XML fragment file in the
CATALINA_HOME/conf/[EngineName]/[HostName]/
directory, and your webapp contains a META-INF/context.xml file, that
context.xml file will be read and used by Tomcat (again, make sure
you do not set deployXML="false"
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.