Struts2 parameters is coming null in action class when using Interceptors

[Santhosh Kalisamy]

Hi,

When I am using Interceptors, the values on Action class coming as null. I have removed the Interceptors, the values coming perfect from the JSP page.

Login.jsp

<s:form id="loginFrm" name="loginFrm" action="LoginAction"> <s:textfield key="username"/> <s:password key="password"/> <s:submit/> </s:form>

LoginAction.java

public class LoginAction {

	private static Logger LOGGER = Logger.getLogger(LoginAction.class);

	private String username;
	private String password;
	
	public String execute() throws Exception {
		LOGGER.info("LoginAction : authenticate()");
		LOGGER.info("LoginAction : {[" + username + "],["+password+ "]}");
		return "success";
	}

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}
}

web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app id="WebApp_9" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <display-name>Bulk Fund Switching</display-name> <context-param> <param-name> org.apache.tiles.impl.BasicTilesContainer.DEFINITIONS_CONFIG </param-name> <param-value>/WEB-INF/tiles.xml</param-value> </context-param> <listener> <listener-class>org.apache.struts2.tiles.StrutsTilesListener </listener-class> </listener> <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> <welcome-file-list> <welcome-file>jsp/Login.jsp</welcome-file> </welcome-file-list> </web-app>

struts.xml (working version)
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts> <constant name="struts.enable.DynamicMethodInvocation" value="false" /> <constant name="struts.devMode" value="false" /> <constant name="struts.custom.i18n.resources" value="BFSView,BFSMessages" /> <package name="home-default" extends="struts-default" namespace="/"> <result-types> <result-type name="tiles" class="org.apache.struts2.views.tiles.TilesResult" /> </result-types> <interceptors> <interceptor name="AuthenticationInterceptor" class="com.lv.bfs.controller.interceptor.AuthenticationInterceptor"></interceptor> <interceptor-stack name="SecureStack"> <interceptor-ref name="AuthenticationInterceptor" /> </interceptor-stack> </interceptors> <action name="LoginAction" class="com.lv.bfs.controller.action.LoginAction"> <result name="success">jsp/Welcome.jsp</result> <result name="error">/jsp/Login.jsp</result> </action> </package> </struts>


struts.xml (Notworking version )
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts> <constant name="struts.enable.DynamicMethodInvocation" value="false" /> <constant name="struts.devMode" value="false" /> <constant name="struts.custom.i18n.resources" value="BFSView,BFSMessages" /> <package name="home-default" extends="struts-default" namespace="/"> <result-types> <result-type name="tiles" class="org.apache.struts2.views.tiles.TilesResult" /> </result-types> <interceptors> <interceptor name="AuthenticationInterceptor" class="com.lv.bfs.controller.interceptor.AuthenticationInterceptor"></interceptor> <interceptor-stack name="SecureStack"> <interceptor-ref name="AuthenticationInterceptor" /> </interceptor-stack> </interceptors> <action name="LoginAction" class="com.lv.bfs.controller.action.LoginAction"> <interceptor-ref name="SecureStack"></interceptor-ref> <result name="success">jsp/Welcome.jsp</result> <result name="error">/jsp/Login.jsp</result> </action> </package> </struts>

AuthenticationInterceptor.java

public class AuthenticationInterceptor extends AbstractInterceptor {

	private static Logger LOGGER = Logger.getLogger(AuthenticationInterceptor.class);

	private static final long serialVersionUID = 1844249996954274967L;

	public String intercept(ActionInvocation invocation) throws Exception {
		LOGGER.info("intercept : START");
		return invocation.invoke();
	}
}

Logs statements (both cases)
12:39:05,533 INFO [AuthenticationInterceptor] intercept : START 12:39:05,533 INFO [LoginAction] LoginAction : authenticate() 12:39:05,533 INFO [LoginAction] LoginAction : {[null],[null]}
12:09:05,533 INFO [LoginAction] LoginAction : authenticate() 12:09:05,533 INFO [LoginAction] LoginAction : {[admin],[admin]}

Any suggestions?

[Santhosh Kalisamy]

Fixed this issue by including default Interceptors.

<interceptor-ref name="defaultStack"/>

struts.xml
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts> <constant name="struts.enable.DynamicMethodInvocation" value="false" /> <constant name="struts.devMode" value="false" /> <constant name="struts.custom.i18n.resources" value="BFSView,BFSMessages" /> <package name="home-default" extends="struts-default" namespace="/"> <result-types> <result-type name="tiles" class="org.apache.struts2.views.tiles.TilesResult" /> </result-types> <interceptors> <interceptor name="AuthenticationInterceptor" class="com.lv.bfs.controller.interceptor.AuthenticationInterceptor"></interceptor> <interceptor-stack name="SecureStack"> <interceptor-ref name="AuthenticationInterceptor" /> <interceptor-ref name="defaultStack"/> <!-- include the defaultStack this way--> </interceptor-stack> </interceptors> <action name="LoginAction" class="com.lv.bfs.controller.action.LoginAction"> <result name="success">jsp/Welcome.jsp</result> <result name="error">/jsp/Login.jsp</result> </action> </package> </struts>

Hope this helps, you all.