Estoy tratando de configurar Spring Plugin con la aplicación Strut 2 que ya se está ejecutando con el plugin convencional, así que estoy usando anotaciones. Estoy usando ExtJs para el envío de mi formulario, que inicialmente funcionaba bien hasta que introduje el plugin spring, ahora la solicitud ajax no puede localizar las acciones y no muestra ninguna respuesta en firebug.

pom.xml

    <!-- struts 2 dependencies -->
<dependency>
    <groupId>org.apache.struts</groupId>
    <artifactId>struts2-core</artifactId>
    <version>${struts2.version}</version>
</dependency>

<dependency>
    <groupId>org.apache.struts</groupId>
    <artifactId>struts2-convention-plugin</artifactId>
    <version>${struts2.version}</version>
</dependency>

<dependency>
    <groupId>org.apache.struts</groupId>
    <artifactId>struts2-json-plugin</artifactId>
    <version>${struts2.version}</version>
</dependency>

<dependency>
    <groupId>org.apache.struts</groupId>
    <artifactId>struts2-spring-plugin</artifactId>
    <version>${struts2.version}</version>
</dependency>

<!-- Import the CDI API -->
<dependency>
    <groupId>org.apache.struts</groupId>
    <artifactId>struts2-cdi-plugin</artifactId>
    <version>${struts2.version}</version>
</dependency>
<dependency>
<groupId>javax.enterprise</groupId>
    <artifactId>cdi-api</artifactId>
    <version>1.0-SP1</version><!--$NO-MVN-MAN-VER$-->
    <scope>provided</scope>
</dependency>

<!-- Spring framework -->
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>${spring.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-beans</artifactId>
    <version>${spring.version}</version>
</dependency>

struts.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
    <constant name="struts.custom.i18n.resources" value="ApplicationResources" />
    <constant name="struts.devMode" value="true" />
    <constant name="struts.convention.result.path" value="/content" />
    <constant name="struts.multipart.saveDir" value="/tmp" />
    <constant name="struts.multipart.maxSize" value="4194304" />
    <constant name="struts.action.excludePattern" value="/api/.*?" />

</struts>

web.xml

<display-name>Application</display-name>
<welcome-file-list>
  <welcome-file>index.html</welcome-file>
</welcome-file-list>

<filter>
    <filter-name>struts2</filter-name>
    <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>

<filter-mapping>
    <filter-name>struts2</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

<listener>  
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
</listener> 

<servlet>
  <servlet-name>Resteasy</servlet-name>
  <servlet-class>org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher</servlet-class>
</servlet>
<servlet-mapping>
  <servlet-name>Resteasy</servlet-name>
  <url-pattern>/api/*</url-pattern>
</servlet-mapping>
<context-param>
<param-name>resteasy.scan</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
  <param-name>resteasy.servlet.mapping.prefix</param-name>
  <param-value>/api</param-value>
</context-param>
<listener>
  <listener-class>org.jboss.resteasy.plugins.server.servlet.ResteasyBootstrap</listener-class>
</listener>

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
   xmlns:tx="http://www.springframework.org/schema/tx"
   xsi:schemaLocation="
      http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
</beans>

Clase de acción

@Namespace("/units")
@Result(
    type = "stream",
    params = {
        "inputName", "stream"
    }
)
public class PropertyTypeAction extends BaseAction implements ActionImpl{

    @PersistenceUnit
    private EntityManagerFactory emf;

    @Action(value="add")
    public String add() {
        .......

    }
}

Ajax Request firebug report, pestaña XML

XML Parsing Error: no element found Location: moz-nullprincipal:{7fc640bd-f293-4956-8cf2-178765cec735} Line Number 1, Column 1:

Mi pregunta es cómo puedo configurar el complemento struts-spring para que funcione con el complemento de convención struts con las anotaciones.