jetty-alpn/jetty-alpn-server/src/main/config/etc/jetty-alpn.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE Configure PUBLIC "-//Jetty//Configure//EN" "http://www.eclipse.org/jetty/configure_9_3.dtd">

<Configure id="sslConnector" class="org.eclipse.jetty.server.ServerConnector">

  <Call name="addConnectionFactory">
    <Arg>
      <New class="org.eclipse.jetty.server.SslConnectionFactory">
        <Arg name="next">alpn</Arg>
        <Arg name="sslContextFactory"><Ref refid="sslContextFactory"/></Arg>
      </New>
    </Arg>
  </Call>
  
  <Call name="addConnectionFactory">
    <Arg>
      <New id="alpn" class="org.eclipse.jetty.alpn.server.ALPNServerConnectionFactory">
        <Arg type="String">
          <Property name="jetty.alpn.protocols" deprecated="alpn.protocols" default="" />
        </Arg>
        <Set name="defaultProtocol">
          <Property name="jetty.alpn.defaultProtocol" deprecated="alpn.defaultProtocol" />
        </Set>
      </New>
    </Arg>
  </Call>

  <!-- ALPN debugging on System.err -->
  <Set class="org.eclipse.jetty.alpn.ALPN" name="debug" type="boolean"><Property name="jetty.alpn.debug" default="false" /></Set>

</Configure>