|  Version: 9.4.0.M0 | 
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jetty-env.xml is an optional Jetty file that configures JNDI resources for an individual webapp.
The format of jetty-env.xml is the same as jetty.xml –it is an XML mapping of the Jetty API.
When Jetty deploys a web application, it automatically looks for a file called ` WEB-INF/jetty-env.xml` within the web application (or WAR), and sets up the webapp naming environment so that naming references in the WEB-INF/web.xml file can be resolved from the information provided in the WEB-INF/jetty-env.xml and jetty.xml files.
You define global naming resources on the server via jetty.xml.
Jetty applies jetty-env.xml on a per-webapp basis, and configures an instance of org.eclipse.jetty.webapp.WebAppContext.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE Configure PUBLIC "-//Mort Bay Consulting//DTD Configure//EN" "http://www.eclipse.org/jetty/configure.dtd">
<Configure class="org.eclipse.jetty.webapp.WebAppContext">
 ..
</Configure>Caution
Make sure you are applying the configuration to an instance of the proper class.
jetty-env.xmlconfigures an instance of WebAppContext, and not an instance of Server.
Place the jetty-env.xml file in your web application’s WEB-INF folder.
 <?xml version="1.0"?>
 <!DOCTYPE Configure PUBLIC "-//Mort Bay Consulting//DTD Configure//EN" "http://jetty.mortbay.org/configure.dtd">
 <Configure class="org.eclipse.jetty.webapp.WebAppContext">
   <!-- Add an EnvEntry only valid for this webapp               -->
   <New id="gargle"  class="org.eclipse.jetty.plus.jndi.EnvEntry">
     <Arg>gargle</Arg>
     <Arg type="java.lang.Double">100</Arg>
     <Arg type="boolean">true</Arg>
   </New>
  <!-- Add an override for a global EnvEntry                           -->
   <New id="wiggle"  class="org.eclipse.jetty.plus.jndi.EnvEntry">
     <Arg>wiggle</Arg>
     <Arg type="java.lang.Double">55.0</Arg>
     <Arg type="boolean">true</Arg>
   </New>
   <!-- an XADataSource                                                -->
   <New id="mydatasource99" class="org.eclipse.jetty.plus.jndi.Resource">
     <Arg>jdbc/mydatasource99</Arg>
     <Arg>
       <New class="com.atomikos.jdbc.SimpleDataSourceBean">
         <Set name="xaDataSourceClassName">org.apache.derby.jdbc.EmbeddedXADataSource</Set>
         <Set name="xaDataSourceProperties">databaseName=testdb99;createDatabase=create</Set>
         <Set name="UniqueResourceName">mydatasource99</Set>
       </New>
     </Arg>
   </New>
 </Configure>jetty.xml –Configuration file for configuring the entire server.