loginaction.java

the musiccollection struts 1 application i netbeans implementation (strut for dummies book source)

package dummies.struts.music;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.validator.DynaValidatorForm;

/**
 * @author Mike Robinson
 *
 */
public class LoginAction extends Action 
{
	/**
	 * Handles request from user
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @throws Exception
	 */
	public ActionForward execute( 	ActionMapping mapping,
									ActionForm form,
									HttpServletRequest request,
									HttpServletResponse response)
									throws Exception
	{
		// did the user click the Join button?
		Boolean bCancel = (Boolean)request.getAttribute("org.apache.struts.action.CANCEL");
		if(bCancel != null)
			if(bCancel.booleanValue())
				return (mapping.findForward("join"));
		
		// create a new LoginBean passing the datasource
		LoginBean lb = new LoginBean(getDataSource(request, "musiccollection"));
		
		// check to see if this user/password combination are valid
		// will return a non-null UserDTO if valid
		UserDTO user = lb.validateUser((String)((DynaValidatorForm)form).get("email"),
									   (String)((DynaValidatorForm)form).get("password"));
		if(user != null)
		{
			// save UserDTO in session
			request.getSession().setAttribute("user",user);
			return (mapping.findForward("success"));
		}
		else	// username/password not validated
		{
			// create ActionError and save in the request
			ActionErrors errors = new ActionErrors();
			ActionError error = new ActionError("error.login.invalid");
			errors.add("login",error);
			saveErrors(request,errors);
			
			return (mapping.findForward("failure"));
		}
	}
}