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</style></head><body bgcolor="#ffffff" text="#000000" link="#525D76" alink="#525D76" vlink="#525D76"><table border="0" width="100%" cellspacing="0"><!--PAGE HEADER--><tr><td><!--PROJECT LOGO--><a href="http://tomcat.apache.org/"><img src="./images/tomcat.gif" align="right" alt="
The Apache Tomcat Servlet/JSP Container
" border="0"></a></td><td><h1><font face="arial,helvetica,sanserif">Apache Tomcat 7</font></h1><font face="arial,helvetica,sanserif">Version 7.0.42, Jul 2 2013</font></td><td><!--APACHE LOGO--><a href="http://www.apache.org/"><img src="./images/asf-logo.gif" align="right" alt="Apache Logo" border="0"></a></td></tr></table><table border="0" width="100%" cellspacing="4"><!--HEADER SEPARATOR--><tr><td colspan="2"><hr noshade size="1"></td></tr><tr><!--LEFT SIDE NAVIGATION--><td width="20%" valign="top" nowrap class="noPrint"><p><strong>Links</strong></p><ul><li><a href="index.html">Docs Home</a></li><li><a href="http://wiki.apache.org/tomcat/FAQ">FAQ</a></li><li><a href="#comments_section">User Comments</a></li></ul><p><strong>User Guide</strong></p><ul><li><a href="introduction.html">1) Introduction</a></li><li><a href="setup.html">2) Setup</a></li><li><a href="appdev/index.html">3) First webapp</a></li><li><a href="deployer-howto.html">4) Deployer</a></li><li><a href="manager-howto.html">5) Manager</a></li><li><a href="realm-howto.html">6) Realms and AAA</a></li><li><a href="security-manager-howto.html">7) Security Manager</a></li><li><a href="jndi-resources-howto.html">8) JNDI Resources</a></li><li><a href="jndi-datasource-examples-howto.html">9) JDBC DataSources</a></li><li><a href="class-loader-howto.html">10) Classloading</a></li><li><a href="jasper-howto.html">11) JSPs</a></li><li><a href="ssl-howto.html">12) SSL</a></li><li><a href="ssi-howto.html">13) SSI</a></li><li><a href="cgi-howto.html">14) CGI</a></li><li><a href="proxy-howto.html">15) Proxy Support</a></li><li><a href="mbeans-descriptor-howto.html">16) MBean Descriptor</a></li><li><a href="default-servlet.html">17) Default Servlet</a></li><li><a href="cluster-howto.html">18) Clustering</a></li><li><a href="balancer-howto.html">19) Load Balancer</a></li><li><a href="connectors.html">20) Connectors</a></li><li><a href="monitoring.html">21) Monitoring and Management</a></li><li><a href="logging.html">22) Logging</a></li><li><a href="apr.html">23) APR/Native</a></li><li><a href="virtual-hosting-howto.html">24) Virtual Hosting</a></li><li><a href="aio.html">25) Advanced IO</a></li><li><a href="extras.html">26) Additional Components</a></li><li><a href="maven-jars.html">27) Mavenized</a></li><li><a href="security-howto.html">28) Security Considerations</a></li><li><a href="windows-service-howto.html">29) Windows Service</a></li><li><a href="windows-auth-howto.html">30) Windows Authentication</a></li><li><a href="jdbc-pool.html">31) Tomcat's JDBC Pool</a></li><li><a href="web-socket-howto.html">32) WebSocket</a></li></ul><p><strong>Reference</strong></p><ul><li><a href="RELEASE-NOTES.txt">Release Notes</a></li><li><a href="config/index.html">Configuration</a></li><li><a href="api/index.html">Tomcat Javadocs</a></li><li><a href="servletapi/index.html">Servlet Javadocs</a></li><li><a href="jspapi/index.html">JSP 2.2 Javadocs</a></li><li><a href="elapi/index.html">EL 2.2 Javadocs</a></li><li><a href="http://tomcat.apache.org/connectors-doc/">JK 1.2 Documentation</a></li></ul><p><strong>Apache Tomcat Development</strong></p><ul><li><a href="building.html">Building</a></li><li><a href="changelog.html">Changelog</a></li><li><a href="http://wiki.apache.org/tomcat/TomcatVersions">Status</a></li><li><a href="developers.html">Developers</a></li><li><a href="architecture/index.html">Architecture</a></li><li><a href="funcspecs/index.html">Functional Specs.</a></li><li><a href="tribes/introduction.html">Tribes</a></li></ul></td><!--RIGHT SIDE MAIN BODY--><td width="80%" valign="top" align="left" id="mainBody"><h1>Tomcat Web Application Deployment</h1><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Table of Contents"><!--()--></a><a name="Table_of_Contents"><strong>Table of Contents</strong></a></font></td></tr><tr><td><blockquote>
<ul><li><a href="#Introduction">Introduction</a></li><li><a href="#Installation">Installation</a></li><li><a href="#A_word_on_Contexts">A word on Contexts</a></li><li><a href="#Deployment_on_Tomcat_startup">Deployment on Tomcat startup</a></li><li><a href="#Deploying_on_a_running_Tomcat_server">Deploying on a running Tomcat server</a></li><li><a href="#Deploying_using_the_Tomcat_Manager">Deploying using the Tomcat Manager</a></li><li><a href="#Deploying_using_the_Client_Deployer_Package">Deploying using the Client Deployer Package</a></li></ul>
</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Introduction"><strong>Introduction</strong></a></font></td></tr><tr><td><blockquote>
<p>
Deployment is the term used for the process of installing a web
application (either a 3rd party WAR or your own custom web application)
into the Tomcat server.
</p>
<p>
Web application deployment may be accomplished in a number of ways
within the Tomcat server.</p>
<ul>
<li>Statically; the web application is setup before Tomcat is started</li>
<li>
Dynamically; by directly manipulating already deployed web
applications (relying on <em>auto-deployment</em>
feature) or remotely by using the Tomcat Manager web
application
</li>
</ul>
<p>
The <a href="manager-howto.html">Tomcat Manager</a> is a web
application that can be used interactively (via HTML GUI) or
programmatically (via URL-based API) to deploy and manage web
applications.
</p>
<p>
There are a number of ways to perform deployment that rely on
the Manager web application. Apache Tomcat provides tasks
for Apache Ant build tool.
<a href="http://tomcat.apache.org/maven-plugin.html">Apache Tomcat Maven Plugin</a>
project provides integration with Apache Maven.
There is also a tool called the Client Deployer, which can be
used from a command line and provides additional functionality
such as compiling and validating web applications as well as
packaging web application into web application resource (WAR)
files.
</p>
</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Installation"><strong>Installation</strong></a></font></td></tr><tr><td><blockquote>
<p>
There is no installation required for static deployment of web
applications as this is provided out of the box by Tomcat. Nor is any
installation required for deployment functions with the Tomcat Manager,
although some configuration is required as detailed in the
<a href="manager-howto.html">Tomcat Manager manual</a>.
An installation is however required if you wish
to use the Tomcat Client Deployer (TCD).
</p>
<p>
The TCD is not packaged with the Tomcat core
distribution, and must therefore be downloaded separately from
the Downloads area. The download is usually labelled
<i>apache-tomcat-7.0.x-deployer</i>.
</p>
<p>
TCD has prerequisites of Apache Ant 1.6.2+ and a Java installation.
Your environment should define an ANT_HOME environment value pointing to
the root of your Ant installation, and a JAVA_HOME value pointing to
your Java installation. Additionally, you should ensure Ant's ant
command, and the Java javac compiler command run from the command shell
that your operating system provides.
</p>
<ol>
<li>Download the TCD distribution</li>
<li>
The TCD package need not be extracted into any existing Tomcat
installation, it can be extracted to any location.
</li>
<li>Read Using the <a href="#Deploying_using_the_Client_Deployer_Package">
Tomcat Client Deployer</a></li>
</ol>
</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="A word on Contexts"><!--()--></a><a name="A_word_on_Contexts"><strong>A word on Contexts</strong></a></font></td></tr><tr><td><blockquote>
<p>
In talking about deployment of web applications, the concept of a
<i>Context</i> is required to be understood. A Context is what Tomcat
calls a web application.
</p>
<p>
In order to configure a Context within Tomcat a <i>Context Descriptor</i>
is required. A Context Descriptor is simply an XML file that contains
Tomcat related configuration for a Context, e.g naming resources or
session manager configuration. In earlier versions of
Tomcat the content of a Context Descriptor configuration was often stored within
Tomcat's primary configuration file <i>server.xml</i> but this is now
discouraged (although it currently still works).
</p>
<p>
Context Descriptors not only help Tomcat to know how to configure
Contexts but other tools such as the Tomcat Manager and TCD often use
these Context Descriptors to perform their roles properly.
</p>
<p>
The locations for Context Descriptors are:
</p>
<ol>
<li>$CATALINA_BASE/conf/[enginename]/[hostname]/[webappname].xml</li>
<li>$CATALINA_BASE/webapps/[webappname]/META-INF/context.xml</li>
</ol>
<p>
Files in (1) are named [webappname].xml but files in (2) are named
context.xml. If a Context Descriptor is not provided for a Context,
Tomcat configures the Context using default values.
</p>
</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Deployment on Tomcat startup"><!--()--></a><a name="Deployment_on_Tomcat_startup"><strong>Deployment on Tomcat startup</strong></a></font></td></tr><tr><td><blockquote>
<p>
If you are not interested in using the Tomcat Manager, or TCD,
then you'll need to deploy your web applications
statically to Tomcat, followed by a Tomcat startup. The location you
deploy web applications to for this type of deployment is called the
<code>appBase</code> which is specified per Host. You either copy a
so-called <i>exploded web application</i>, i.e non-compressed, to this
location, or a compressed web application resource .WAR file.
</p>
<p>
The web applications present in the location specified by the Host's
(default Host is "localhost") <code>appBase</code> attribute (default
appBase is "$CATALINA_BASE/webapps") will be deployed on Tomcat startup
only if the Host's <code>deployOnStartup</code> attribute is "true".
</p>
<p>
The following deployment sequence will occur on Tomcat startup in that
case:
</p>
<ol>
<li>Any Context Descriptors will be deployed first.</li>
<li>
Exploded web applications not referenced by any Context
Descriptor will then be deployed. If they have an associated
.WAR file in the appBase and it is newer than the exploded web application,
the exploded directory will be removed and the webapp will be
redeployed from the .WAR
</li>
<li>.WAR files will be deployed</li>
</ol>
</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Deploying on a running Tomcat server"><!--()--></a><a name="Deploying_on_a_running_Tomcat_server"><strong>Deploying on a running Tomcat server</strong></a></font></td></tr><tr><td><blockquote>
<p>
It is possible to deploy web applications to a running Tomcat server.
</p>
<p>
If the Host <code>autoDeploy</code> attribute is "true", the Host will
attempt to deploy and update web applications dynamically, as needed,
for example if a new .WAR is dropped into the <code>appBase</code>.
For this to work, the Host needs to have background processing
enabled which is the default configuration.
</p>
<p>
<code>autoDeploy</code> set to "true" and a running Tomcat allows for:
</p>
<ul>
<li>Deployment of .WAR files copied into the Host <code>appBase</code>.</li>
<li>
Deployment of exploded web applications which are
copied into the Host <code>appBase</code>.
</li>
<li>
Re-deployment of a web application which has already been deployed from
a .WAR when the new .WAR is provided. In this case the exploded
web application is removed, and the .WAR is expanded again.
Note that the explosion will not occur if the Host is configured
so that .WARs are not exploded with a <code>unpackWARs</code>
attribute set to "false", in which case the web application
will be simply redeployed as a compressed archive.
</li>
<li>
Re-loading of a web application if the /WEB-INF/web.xml file (or
any other resource defined as a WatchedResource) is updated.
</li>
<li>
Re-deployment of a web application if the Context Descriptor
file from which the web application has been deployed is
updated.
</li>
<li>
Re-deployment of dependent web applications if the global or
per-host Context Descriptor file used by the web application is
updated.
</li>
<li>
Re-deployment of a web application if a Context Descriptor file (with a
filename corresponding to the Context path of the previously deployed
web application) is added to the
<code>$CATALINA_BASE/conf/[enginename]/[hostname]/</code>
directory.
</li>
<li>
Undeployment of a web application if its document base (docBase)
is deleted. Note that on Windows, this assumes that anti-locking
features (see Context configuration) are enabled, otherwise it is not
possible to delete the resources of a running web application.
</li>
</ul>
<p>
Note that web application reloading can also be configured in the loader, in which
case loaded classes will be tracked for changes.
</p>
</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Deploying using the Tomcat Manager"><!--()--></a><a name="Deploying_using_the_Tomcat_Manager"><strong>Deploying using the Tomcat Manager</strong></a></font></td></tr><tr><td><blockquote>
<p>
The Tomcat Manager is covered in its <a href="manager-howto.html">own manual page</a>.
</p>
</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Deploying using the Client Deployer Package"><!--()--></a><a name="Deploying_using_the_Client_Deployer_Package"><strong>Deploying using the Client Deployer Package</strong></a></font></td></tr><tr><td><blockquote>
<p>
Finally, deployment of web application may be achieved using the
Tomcat Client Deployer. This is a package which can be used to
validate, compile, compress to .WAR, and deploy web applications to
production or development Tomcat servers. It should be noted that this feature
uses the Tomcat Manager and as such the target Tomcat server should be
running.
</p>
<p>
It is assumed the user will be familiar with Apache Ant for using the TCD.
Apache Ant is a scripted build tool. The TCD comes pre-packaged with a
build script to use. Only a modest understanding of Apache Ant is
required (installation as listed earlier in this page, and familiarity
with using the operating system command shell and configuring
environment variables).
</p>
<p>
The TCD includes Ant tasks, the Jasper page compiler for JSP compilation
before deployment, as well as a task which
validates the web application Context Descriptor. The validator task (class
<code>org.apache.catalina.ant.ValidatorTask</code>) allows only one parameter:
the base path of an exploded web application.
</p>
<p>
The TCD uses an exploded web application as input (see the list of the
properties used below). A web application that is programmatically
deployed with the deployer may include a Context Descriptor in
<code>/META-INF/context.xml</code>.
</p>
<p>
The TCD includes a ready-to-use Ant script, with the following targets:
</p>
<ul>
<li>
<code>compile</code> (default): Compile and validate the web
application. This can be used standalone, and does not need a running
Tomcat server. The compiled application will only run on the associated
<em>Tomcat X.Y.Z</em> server release, and is not guaranteed to work
on another Tomcat release, as the code generated by Jasper depends on its runtime
component. It should also be noted that this target will also compile
automatically any Java source file located in the
<code>/WEB-INF/classes</code> folder of the web application.</li>
<li>
<code>deploy</code>: Deploy a web application (compiled or not) to
a Tomcat server.
</li>
<li><code>undeploy</code>: Undeploy a web application</li>
<li><code>start</code>: Start web application</li>
<li><code>reload</code>: Reload web application</li>
<li><code>stop</code>: Stop web application</li>
</ul>
<p>
In order for the deployment to be configured, create a file
called <code>deployer.properties</code> in the TCD installation
directory root. In this file, add the following name=value pairs per
line:
</p>
<p>
Additionally, you will need to ensure that a user has been
setup for the target Tomcat Manager (which TCD uses) otherwise the TCD
will not authenticate with the Tomcat Manager and the deployment will
fail. To do this, see the Tomcat Manager page.
</p>
<ul>
<li>
<code>build</code>: The build folder used will be, by default,
<code>${build}/webapp/${path}</code>. After the end of the execution
of the <code>compile</code> target, the web application .WAR will be
located at <code>${build}/webapp/${path}.war</code>.
</li>
<li>
<code>webapp</code>: The directory containing the exploded web application
which will be compiled and validated. By default, the folder is
<code>myapp</code>.
</li>
<li>
<code>path</code>: Deployed context path of the web application,
by default <code>/myapp</code>.
</li>
<li>
<code>url</code>: Absolute URL to the Tomcat Manager web application of a
running Tomcat server, which will be used to deploy and undeploy the
web application. By default, the deployer will attempt to access
a Tomcat instance running on localhost, at
<code>http://localhost:8080/manager/text</code>.
</li>
<li>
<code>username</code>: Tomcat Manager username (user should have a role of
manager-script)
</li>
<li><code>password</code>: Tomcat Manager password.</li>
</ul>
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