Hello, I have a problem. When a user types in his usename and
password, then hits a Validate button, i'd like to check whether the
String couple he just typed matches anything in a database.
I do that by calling execute() which is within the LoginCommand class
which implements Command.
However, it doesn't work, and I can't even run it as GWT hosted mode
application, I get the following error :
Failed to load module
Errors in 'file:/home/..../command/LoginCommand.java'
Line 42 : No source code is available for type .../LogonServiceImpl;
did you forget to inherit a required module ?
(Line 42 : LogonServiceImpl logservice = new LogonServiceImpl();)
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package com.enseirb.projecthandler.client.command;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;
import com.enseirb.projecthandler.server.servlet.LogonServiceImpl;
import com.enseirb.projecthandler.client.object.SerializableUser;
import com.enseirb.projecthandler.client.service.LogonService;
import com.enseirb.projecthandler.client.service.LogonServiceAsync;
import com.enseirb.projecthandler.client.view.Login;
import com.enseirb.projecthandler.client.view.Menu;
import com.enseirb.projecthandler.server.mapping.HibernateUtil;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.rpc.ServiceDefTarget;
public class LoginCommand implements Command {
private Login logSystem;
public void execute(){
//Gets informations on an onclick event
final String login = logSystem.getUsername();
final String pass = logSystem.getPassword();
//Gets the service and specifies its name
LogonServiceAsync logonService = (LogonServiceAsync) GWT.create
(LogonService.class);
ServiceDefTarget endpoint = (ServiceDefTarget) logonService;
String moduleRelativeURL = GWT.getModuleBaseURL() + "logon";
endpoint.setServiceEntryPoint(moduleRelativeURL);
//Creates callback
AsyncCallback callback = new AsyncCallback() {
public void onFailure(Throwable caught) {
Window.alert("Login process failed !");
}
public void onSuccess(Object result) {
SerializableUser user = (SerializableUser) result;
if (user!=null) {
LogonServiceImpl logservice = new LogonServiceImpl();
user = logservice.checkLogin(login, pass);
if(user.getStatus().equals("admin")){
logSystem.setLogin();
Command home = new ViewHomeCommand();
}
else if(user.getStatus().equals("student")){
logSystem.setLogin();
Command cmd = new LogStudentCommand();
}
else if(user.getStatus().equals("teacher")){
logSystem.setLogin();
Command cmd = new ShowCaseCommand(1);
}
}
else {//Maybe useless... to be checked
logSystem = null;
Window.alert("Invalid login/password !");
}
}
};
logonService.checkLogin(login, pass, callback);
}
public LoginCommand(Login login){
logSystem = login;
}
}
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package com.enseirb.projecthandler.server.servlet;
import java.util.HashMap;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.hibernate.Session;
import com.enseirb.projecthandler.client.object.SerializableUser;
import com.enseirb.projecthandler.client.service.LogonService;
import com.enseirb.projecthandler.server.mapping.HibernateUtil;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;
/*
* Implementation of our service interface with a server-side servlet
*/
public class LogonServiceImpl extends RemoteServiceServlet
implements LogonService{
private HttpSession getSession() {
// Get the current request and then return its session
return this.getThreadLocalRequest().getSession();
}
@Override
public SerializableUser checkLogin(String login, String password) {
// TODO Check login and password from a database
// return user from database if match
//Connection to database
Session session =
HibernateUtil.getSessionFactory().openSession();
List users = session.createQuery("from User").list();
SerializableUser[] userlist = new
SerializableUser[users.size()];
for(Integer i=0;i<userlist.length;i++){
if(userlist[i].getLogin().equals(login) &&
userlist[i].getPassword
().equals(password)){
SerializableUser user = new
SerializableUser(userlist[i].getLogin
(),
userlist[i].getLogin()+"@enseirb.fr", userlist[i].getStatus(),
userlist[i].getPassword());
getThreadLocalRequest().getSession().setAttribute("user", user);
HttpSession sessionObj =
getThreadLocalRequest().getSession();
return user;
}
}
return null;
}
}
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package com.enseirb.projecthandler.client.service;
import com.enseirb.projecthandler.client.object.SerializableUser;
import com.google.gwt.user.client.rpc.RemoteService;
/*
* Interface of service which checks login
* @param login
* @param password
* returns corresponding user if the couple is correct
*/
public interface LogonService extends RemoteService{
SerializableUser checkLogin(String username, String password);
}
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