How to call DWR in login.jsp EXT

2015-10-20T12:50:28Z

Dear frds,
I have one requirement ,iam new at liferay ,I have one doubt , can u please help me.
i want to call dwr in login.jsp using Hook , so that i have followed below steps ,Iam unable to call dwr in login.jsp the DWR is not working,

I am new @liferay Iam trying to call DWR in Login.jsp using Ext portlet.

1) I Have created EXT as LogAct-ext ,In that i have copied dwr.jar in this path /ext-lib/portal/dwr.jar
2) i have added dwr servlet code in web.xml path is /ext-web/dockroot/WEB_INF/web.xml

<servlet>
<servlet-name>dwr-invoker</servlet-name>
<display-name>DWR Servlet</display-name>
<servlet-class>
org.directwebremoting.servlet.DwrServlet
</servlet-class>
<init-param>
<param-name>debug</param-name>
<param-value>true</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>dwr-invoker</servlet-name>
<url-pattern>/dwr/*</url-pattern>
</servlet-mapping>

3) I have created dwr.xml in /ext-web/dockroot/WEB_INF/dwr.xml in this path
<dwr>
<allow>
<create creator="new" javascript="Person" scope="script">
<param name="class" value="com.practice.Person"/>
</create>
</allow>
</dwr>

4) I have created my own class in docroot/WEB_INF/ext-impl/src/com/practice/Person.java
public class Person {

public String getData(int index) {
String name=new String("meera");
return name;
}

}
5) lastly i have called this dwr in login.jsp Path is /ext-web/dockroot/html/portlet/login/login.jsp
<script type='text/javascript' src='/dwr/interface/Person.js'> </script>
<script type='text/javascript' src='/dwr/engine.js'> </script>
<script type='text/javascript' src='/dwr/util.js'></script>
<button id="checkDwr">click1</button>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("#checkDwr").click(function(){
alert("hello");
Person.getData(42, {
callback:function(str) {
alert(str);
}
});
});
});
</script>

My problem is that i have not able to get the values from DWR .Iam getting "NOT FOUND " alert when iam calling dwr.

So please help me were iam going wrong in DWR using EXT

Regards
Shrikanth K Domala