JSP and EJBs

[star111792]

helo all

i am working with JSP and EJBs. i have written a simple code for verifying username and password of user by using session beans. my problem is that i am getting the following error:


HTTP Status 500 -

--------------------------------------------------------------------------------

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasp er.JasperExcept ion: Unable to compile class for JSP

An error occurred at line: 15 in the jsp file: /Verify.jsp
Generated servlet error:
Type mismatch: cannot convert from boolean to Boolean


org.apache.jasp er.compiler.Def aultErrorHandle r.javacError(De faultErrorHandl er.java:84)
org.apache.jasp er.compiler.Err orDispatcher.ja vacError(ErrorD ispatcher.java: 328)
org.apache.jasp er.compiler.JDT Compiler.genera teClass(JDTComp iler.java:397)
org.apache.jasp er.compiler.Com piler.compile(C ompiler.java:28 8)
org.apache.jasp er.compiler.Com piler.compile(C ompiler.java:26 7)
org.apache.jasp er.compiler.Com piler.compile(C ompiler.java:25 5)
org.apache.jasp er.JspCompilati onContext.compi le(JspCompilati onContext.java: 556)
org.apache.jasp er.servlet.JspS ervletWrapper.s ervice(JspServl etWrapper.java: 293)
org.apache.jasp er.servlet.JspS ervlet.serviceJ spFile(JspServl et.java:314)
org.apache.jasp er.servlet.JspS ervlet.service( JspServlet.java :264)
javax.servlet.h ttp.HttpServlet .service(HttpSe rvlet.java:810)
org.jboss.web.t omcat.filters.R eplyHeaderFilte r.doFilter(Repl yHeaderFilter.j ava:81)


note The full stack trace of the root cause is available in the Apache Tomcat/5.5.9 logs.


--------------------------------------------------------------------------------

Apache Tomcat/5.5.9



im using jboss-4.0.2

im also presenting code for ur consideration


VerifyUser.java
------------------------


package hina.mahmood;


import javax.ejb.*;
import java.rmi.*;


public interface VerifyUser extends javax.ejb.EJBOb ject
{

public boolean Verify(String user, String pswd) throws RemoteException ;


}// end interface

---------------------------------------------------------------------------

VerifyUserHome. java
-------------------------------


package hina.mahmood;

import javax.ejb.*;
import java.rmi.*;
import javax.ejb.EJBHo me;


public interface VerifyUserHome extends javax.ejb.EJBHo me
{

public VerifyUser create() throws RemoteException ,CreateExceptio n;


}// end interface

--------------------------------------------------------------------------------

VerifyUserBean. java
-------------------------------


package hina.mahmood;



import javax.ejb.*;
import java.rmi.*;
import java.sql.*;


public class VerifyUserBean implements SessionBean
{

private SessionContext ctx;



public Boolean Verify(String user,String pswd) throws RemoteException
{

int flag=0;
Boolean bool=new Boolean("false" );


try{
Class.forName(" sun.jdbc.odbc.J dbcOdbcDriver") ;
Connection con=DriverManag er.getConnectio n("jdbc:odbc:ho nie");
Statement stmt=con.create Statement();
String query="Select username,passwo rd from hina";
ResultSet rs=stmt.execute Query(query);

while(rs.next() )
{
if((rs.getStrin g("username").e quals(user))&&( rs.getString("p assword").equal s(pswd)))
{
flag=1;
break;

}
}// end while



}// end try


catch(Exception e)
{System.out.pri ntln(e);}




if(flag==0)
{
bool=new Boolean("false" );
return bool;
}


else
if(flag==1)
{
bool=new Boolean("true") ;
return bool;
}


return bool;



}// end method



public void ejbcreate() throws RemoteException ,CreateExceptio n
{



}// end method




public void setSessionConte xt(SessionConte xt ctx)
{
this.ctx=ctx;
}



public void ejbPassivate()
{}


public void ejbActivate()
{}



public void ejbRemove()
{}


}// end class

----------------------------------------------------------------------------

Verify.jsp is tha page that uses the session bean

-------------------------------------

<%@ page import="java.rm i.*,javax.namin g.Context,javax .naming.Initial Context,hina.ma hmood.*"%>


<%

String username=reques t.getParameter( "user");
String password=reques t.getParameter( "pswd");

InitialContext cxt=new InitialContext( );

Object obj=cxt.lookup( "VerifyUser ");

VerifyUserHome userHome=(Verif yUserHome)javax .rmi.PortableRe moteObject.narr ow(obj,VerifyUs erHome.class);


VerifyUser vs=userHome.cre ate();


Boolean b=vs.Verify(use rname,password) ;

boolean bool=b.booleanV alue();

if(bool)
response.sendRe direct("main.js p");

else
response.sendRe direct("main.js p");


%>
-------------------------------------------

plz do reply to it to solve my problem.

thanks

[BigDaddyLH]

First off, please help out the forum members who try to read your code:

1. Use code tags.
2. Try not to put so many blanks lines in source code -- saves on scrolling.

I'm not a EJB programmer (I hear EJB is well on the way out, but that's another thread) but you seem to have a basic syntax problem:

[CODE=Java]VerifyUser vs=userHome.cre ate();
Boolean b=vs.Verify(use rname,password) ;[/CODE]
(I should have made a point #3: if you have an error message referring to line #42, please indicate which is line #42!)

I checked your interface VerifyUser and found:
[CODE=Java]public boolean Verify(String user, String pswd) throws RemoteException ;[/CODE]
Do you see the problem and the solution, now?

I could even add a point #4: the less Java you embed in a JSP the better, and the best is no Java at all. That way, among other things, you don't get these Java errors when compiling JSP.

[star111792]

im unable to understand ur view-point. will u kindly elaborate???

[BigDaddyLH]

[CODE=Java]VerifyUser vs=userHome.cre ate();
Boolean b=vs.Verify(use rname,password) ;

...

public boolean Verify(String user, String pswd) throws RemoteException ;[/CODE]

The return type of verify is Boolean, not boolean. Do you know the difference between java.lang.Boole an and boolean?

[star111792]

ooooooooooooooo ooooooooooo
yes i know the difference, this mistake was not intentional. anyways thanks 4 help, but now i m getting another exception. need ur help again

i m getting the following exception

[EXCEPTION]

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.S ervletException : VerifyUser not bound
org.apache.jasp er.runtime.Page ContextImpl.doH andlePageExcept ion(PageContext Impl.java:848)
org.apache.jasp er.runtime.Page ContextImpl.han dlePageExceptio n(PageContextIm pl.java:781)
org.apache.jsp. Verify_jsp._jsp Service(org.apa che.jsp.Verify_ jsp:98)
org.apache.jasp er.runtime.Http JspBase.service (HttpJspBase.ja va:97)
javax.servlet.h ttp.HttpServlet .service(HttpSe rvlet.java:810)
org.apache.jasp er.servlet.JspS ervletWrapper.s ervice(JspServl etWrapper.java: 322)
org.apache.jasp er.servlet.JspS ervlet.serviceJ spFile(JspServl et.java:314)
org.apache.jasp er.servlet.JspS ervlet.service( JspServlet.java :264)
javax.servlet.h ttp.HttpServlet .service(HttpSe rvlet.java:810)
org.jboss.web.t omcat.filters.R eplyHeaderFilte r.doFilter(Repl yHeaderFilter.j ava:81)


root cause

javax.naming.Na meNotFoundExcep tion: VerifyUser not bound
org.jnp.server. NamingServer.ge tBinding(Naming Server.java:491 )
org.jnp.server. NamingServer.ge tBinding(Naming Server.java:499 )
org.jnp.server. NamingServer.ge tObject(NamingS erver.java:505)
org.jnp.server. NamingServer.lo okup(NamingServ er.java:278)
org.jnp.interfa ces.NamingConte xt.lookup(Namin gContext.java:6 10)
org.jnp.interfa ces.NamingConte xt.lookup(Namin gContext.java:5 72)
javax.naming.In itialContext.lo okup(InitialCon text.java:347)
org.apache.jsp. Verify_jsp._jsp Service(org.apa che.jsp.Verify_ jsp:67)
org.apache.jasp er.runtime.Http JspBase.service (HttpJspBase.ja va:97)
javax.servlet.h ttp.HttpServlet .service(HttpSe rvlet.java:810)
org.apache.jasp er.servlet.JspS ervletWrapper.s ervice(JspServl etWrapper.java: 322)
org.apache.jasp er.servlet.JspS ervlet.serviceJ spFile(JspServl et.java:314)
org.apache.jasp er.servlet.JspS ervlet.service( JspServlet.java :264)
javax.servlet.h ttp.HttpServlet .service(HttpSe rvlet.java:810)
org.jboss.web.t omcat.filters.R eplyHeaderFilte r.doFilter(Repl yHeaderFilter.j ava:81)


note The full stack trace of the root cause is available in the Apache Tomcat/5.5.9 logs.


--------------------------------------------------------------------------------

Apache Tomcat/5.5.9

[/EXCEPTION]



what have i done wrong now????

[BigDaddyLH]

Someone else will have to help you. That looks like an EJB problem.

[star111792]

ok. thanks 4 ur support