gistfile1.xml

<subsystem name="undertow"  >

  <worker accept-threads="5" read-threads="5" write-threads="5" >
    <high-water-mark value="10000" />
    ... more options....
  </worker>

  <http-listener name="listener1" socket="my-binding" handler="myHandlerChain">
    <tcp-nodelay value="true" >
  </http-listener>

  <http-listener name="listener2" socket="my-sother-binding" handler="default">
    <tcp-nodelay value="true" >
  </http-listener>

  <handler-chain name="myHandlerChain">
     <handler name="connectionLimitingHandler"> 
     <handler name="virtualHostHandler">
     <handler-chain name="default" /> <!-- only executed if virtual host does not match -->
  </handler-chain>

  <connection-limiting-handler name="connectionLimitingHandler" requests-per-second="10" />

  <virtual-host-handler name="virtualHostHandler" >
    <host name="www.mysite.com" handler="mySite" />
    <host name="www.somesite.com" handler="myOtherSite" />
  </virtual-host-handler>

  <handler-chain name="mySite" >
    <handler name="someSecurityHandler" />
    <handler name="compressionHandler />
    <handler name="mySiteServlet />
  </handler-chain>

  <security-handler name="someSecurityHandler" >
    ...some security stuff
  </security-handler>
 
  
</subsystem>