The red colours are printed by me...



Initializing AppEngine server
The server is running at http://localhost:8888/
Jan 31, 2011 9:46:10 AM com.google.appengine.tools.development.LocalResourceFileServlet doGet
WARNING: No file found for: /war/LoginSample.css
Jan 31, 2011 9:46:10 AM com.google.appengine.tools.development.LocalResourceFileServlet doGet
WARNING: No file found for: /loginsample/war/LoginSample.css
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
UserName = a
asasasasassasasasasasaasasasassasas------======
31 [btpool0-1] INFO org.hibernate.cfg.Environment - Hibernate 3.3.2.GA
31 [btpool0-1] INFO org.hibernate.cfg.Environment - hibernate.properties not found
47 [btpool0-1] INFO org.hibernate.cfg.Environment - Bytecode provider name : javassist
47 [btpool0-1] INFO org.hibernate.cfg.Environment - using JDK 1.4 java.sql.Timestamp handling
asasasasassasasasasasaasasasassasas------======2
204 [btpool0-1] INFO org.hibernate.cfg.Configuration - configuring from resource: /hibernate.cfg.xml
204 [btpool0-1] INFO org.hibernate.cfg.Configuration - Configuration resource: /hibernate.cfg.xml
344 [btpool0-1] INFO org.hibernate.cfg.Configuration - Reading mappings from resource : javaObject/Login.hbm.xml
438 [btpool0-1] INFO org.hibernate.cfg.HbmBinder - Mapping class: javaObject/Login -> login
asasasasassasasasasasaasasasassasas------======3
469 [btpool0-1] INFO org.hibernate.cfg.Configuration - Configured SessionFactory: null
578 [btpool0-1] INFO org.hibernate.connection.DriverManagerConnectionProvider - Using Hibernate built-in connection pool (not for production use!)
578 [btpool0-1] INFO org.hibernate.connection.DriverManagerConnectionProvider - Hibernate connection pool size: 20
578 [btpool0-1] INFO org.hibernate.connection.DriverManagerConnectionProvider - autocommit mode: false
594 [btpool0-1] INFO org.hibernate.connection.DriverManagerConnectionProvider - using driver: com.mysql.jdbc.Driver at URL: jdbc:mysql://localhost:3306/test
594 [btpool0-1] INFO org.hibernate.connection.DriverManagerConnectionProvider - connection properties: {user=root, password=****}
fffffffffffffffffffffffffffffffffff
Initial Session Factory creation failed : java.lang.ExceptionInInitializerError
Jan 31, 2011 9:46:25 AM com.google.appengine.tools.development.ApiProxyLocalImpl log
SEVERE: [1296467185917000] javax.servlet.ServletContext log: Exception while dispatching incoming RPC call
com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract boolean javaClass.client.LoginService.isValidLogin(java.lang.String,java.lang.String)' threw an unexpected exception: java.lang.ExceptionInInitializerError
at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:378)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:581)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:188)
at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:224)
at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093)
at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:51)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:121)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:70)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:352)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:313)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:506)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:844)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:644)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:396)
at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)
Caused by: java.lang.ExceptionInInitializerError
at javaObject.HibernateUtil.<clinit>(HibernateUtil.java:22)
at javaClass.server.LoginServiceImpl.isValidLogin(LoginServiceImpl.java:26)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:100)
at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:562)
... 30 more
Caused by: java.lang.ExceptionInInitializerError
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:154)
at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:133)
at org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:111)
at org.hibernate.cfg.Configuration.buildSettingsInternal(Configuration.java:2119)
at org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2115)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1339)
at javaObject.HibernateUtil.<clinit>(HibernateUtil.java:16)
... 37 more
Caused by: java.security.AccessControlException: access denied (java.lang.RuntimePermission modifyThreadGroup)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:323)
at java.security.AccessController.checkPermission(AccessController.java:546)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkPermission(DevAppServerFactory.java:166)
at com.google.appengine.tools.development.DevAppServerFactory$CustomSecurityManager.checkAccess(DevAppServerFactory.java:191)
at java.lang.ThreadGroup.checkAccess(ThreadGroup.java:288)
at java.lang.Thread.init(Thread.java:332)
at java.lang.Thread.<init>(Thread.java:377)
at java.util.TimerThread.<init>(Timer.java:456)
at java.util.Timer.<init>(Timer.java:71)
at java.util.Timer.<init>(Timer.java:122)
at com.mysql.jdbc.ConnectionImpl.<clinit>(ConnectionImpl.java:208)
... 46 more

can any body tell me what is the cause for this error..I tried many thing..nothing is working.
This error is generated in a file whiose contentes are shown below...


package javaUtil;


import java.util.Iterator;
import javaObject.Student;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

public class HibernateUtil {
public static void main(String[] args){

final SessionFactory sessionFactory;
Session session = null;

try{
//SessionFactory sessionFactory = new Configuration().configure().buildSessionFactory();

System.out.println("asasasasassasasasasasaasasasassasas------======");
Configuration cfg = new Configuration();
System.out.println("asasasasassasasasasasaasasasassasas------======2");
Configuration cfg1 = cfg.configure();
System.out.println("asasasasassasasasasasaasasasassasas------======3");
sessionFactory = cfg1.buildSessionFactory();
System.out.println("asasasasassasasasasasaasasasassasas------======4");

session = sessionFactory.openSession();
String SQL = "from Student s";
Query query = session.createQuery(SQL);
System.out.println("\nS_Id\tF_Name\t\tL_Name\t\tD_No\n");
for(Iterator it=query.iterate();it.hasNext();){
Student s = (Student)it.next();
System.out.print(s.getStudentId());
System.out.print("\t"+s.getFirstName());
System.out.print("\t\t"+s.getLastName());
System.out.println("\t\t"+s.getDeptId());
}
session.close();
}catch(Exception e){
System.out.println(e.getMessage());
}
}
}



This above file "HibernateUtil.java" is called from the below file "LoginServiceImpl.java"

package javaClass.server;

import java.util.Iterator;

import org.hibernate.Query;
import org.hibernate.classic.Session;
import javaClass.client.LoginService;
import javaObject.HibernateUtil;
import javaObject.Login;

import com.google.gwt.user.server.rpc.RemoteServiceServlet;

public class LoginServiceImpl extends RemoteServiceServlet implements LoginService{
//private static final long serialVersionUID = 1L;
//private String VALID_USRNAME ;
//private String VALID_PSWD;

private Boolean flag = false;

public LoginServiceImpl(){
}

public boolean isValidLogin(String name, String pswd){
System.out.println("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
System.out.println("UserName = "+name);
Session session = HibernateUtil.getSessionFactory().getCurrentSession();
//Session session = HibernateUtil.getSessionFactory().openSession();
System.out.println("Password = "+pswd);
session.beginTransaction();
System.out.println("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");
String SQL = "from Login as l where l.username = "+name+" and l.password = "+pswd;
System.out.println("SQL ---------------------------------- : "+SQL);
Query query = session.createQuery(SQL);
for(Iterator it = query.iterate();it.hasNext();){
Login login = (Login)it.next();
if(name.equals(login.getUsername())&& pswd.equals(login.getPassword())){
flag = true;
}
}
//session.close();
session.getTransaction().commit();
return flag;
//return VALID_USRNAME.equals(name) && VALID_PSWD.equals(pswd);
}

}

This is a GWT+Hibernate+MySQL project....

1 Student does not appear to be mapped in hibernate.cfg.xml
2 Hibernateutil looks all wrong for starters, I suggest you try somthing like:



Your isValidLogin method becomes:

Thanx bolsover..I will try it and let you know what happend. Thanx a lot.