Gradle + Jetty + AJP (Ajp13SocketConnector)

build.gradle

apply plugin: 'jetty'
apply plugin: 'java'
apply plugin: 'groovy'

repositories {
    mavenCentral()
}

dependencies {
    providedRuntime 'org.mortbay.jetty:jetty-ajp:6.1.26'

    // Servlet & JSP
    compile 'javax.servlet:servlet-api:2.5'
    compile 'javax.servlet:jsp-api:2.0'
}

[jettyRun, jettyRunWar]*.with {
    jettyConfig = new File('src/main/resources/jetty.xml')
    additionalRuntimeJars =  sourceSets.main.runtimeClasspath
}

jetty.xml

<?xml version="1.0"?>
<!DOCTYPE Configure PUBLIC "-//Mort Bay Consulting//DTD Configure//EN" "http://jetty.mortbay.org/configure.dtd">
<Configure id="Server" class="org.mortbay.jetty.Server">
  <Call name="addConnector">
        <Arg>
             <New class="org.mortbay.jetty.ajp.Ajp13SocketConnector">
               <Set name="port">8009</Set>
           </New>
       </Arg>
    </Call>
</Configure>