I have an action in which I try to log in.
public class RegisteredUserAction extends ActionSupport implements SessionAware { .. .. public String login() throws Exception { DBLogic dBLogic = new DBLogic(); RegisteredUser user = null; try { user = dBLogic.getRegisteredUser(getUserUsername(), getUserPassword()); } catch (CredentialException e) { addFieldError("userUsername", e.getMessage()); addActionError(e.getMessage()); return INPUT; } if (user != null) { session.put("user", user); return SUCCESS; } return ERROR; } }
As you can see, if the username or password is invalid, I throw a CredentialException and populate this exception message in my Error field. I even tried to add an action error.
With some tips and searching on the Internet, I managed to use a message interceptor, using annotations in RegisteredUserAction.action and MainAction.action, respectively, storing and retrieving.
import org.apache.struts2.convention.annotation.InterceptorRef; import org.apache.struts2.convention.annotation.InterceptorRefs; @InterceptorRefs({ @InterceptorRef(value = "store", params = {"operationMode", "STORE"}), @InterceptorRef("defaultStack"),})
and
import org.apache.struts2.convention.annotation.InterceptorRefs; @InterceptorRefs({ @InterceptorRef(value = "store", params = {"operationMode", "RETRIEVE"}), @InterceptorRef("defaultStack"),})
This is the contents of the struts.xml file, which matters:
<package name="pages" extends="struts-default" namespace="/"> <global-results> <result name="displayPage">/WEB-INF/template/page.jsp</result> <result name="input">/WEB-INF/template/page.jsp</result> </global-results> <action name="registrationPage" class="actions.MainAction" method="loadRegistrationPage"></action> <action name="loginPage" class="actions.MainAction" method="loadLoginPage"></action> </package> <package name="operations" extends="struts-default" namespace="/"> <action name="userLogin" class="actions.RegisteredUserAction" method="login"> <result type="redirect" name="input">loginPage.action</result> <result type="redirect" name="success">homePage.action</result> </action> </package>
I use a template-based approach where the average content (in my case LoginPage.jsp) is dynamically included in the main page.
My page.jsp (which includes mainContent):
<s:include value="../%{mainContent}.jsp" ></s:include>
My login.jsp (which is included):
<%@taglib prefix="s" uri="/struts-tags"%> <s:form action="userLogin" method="POST"> <s:textfield name="userUsername" />Error:<s:fielderror name="userUsername" /> <s:password name="userPassword" /> <s:submit /> </s:form>
The redirect works correctly and the login form appears, but there are no errors. I even tried using the Message Store interceptor in struts.xml with no luck. :(