a session bean contacts an entity bean

[sarah Marsh]

when a session bean wants to contact an entity bean,
it does not use JNDI to do the lookup. What kind of
way it should use? Does it depend on type of Server?
What if I use Weblogic Server? Could someone show me
that piece of code?
Please help ASAP!
Thanks in advance,
Sarah

[Madhu Juneja]

Calling of a entity bean from a session bean is not app server dependent. If a session bean needs to invoke methods of entity bean, it has to do in the same standard way. It does have to use the JNDI lookup too. And you can of course use weblogic server.
For example :

package myj2ee4;
import javax.ejb.SessionBean;
import java.rmi.RemoteException;
import javax.ejb.SessionContext;
import javax.ejb.CreateException;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;
public class Calc4Bean implements SessionBean
{
Bonus4Home bonushome = null;
public void ejbCreate() throws RemoteException, CreateException
{
System.out.println ("CB : ejbcreate");
}

public void ejbActivate() throws RemoteException
{
System.out.println ("CB : acti ");
}

public void ejbLoad () throws RemoteException
{
System.out.println ("CB : load ");
}

public void ejbPassivate() throws RemoteException
{
System.out.println ("CB : passi");
}

public void ejbStore() throws RemoteException
{
System.out.println ("CB : store");
}

public void setSessionContext (SessionContext ctx)
{
System.out.println ("CB :set ");
}

public void ejbRemove() throws RemoteException
{
System.out.println ("CB : remove");
}
public Bonus4 calcBonus(int multiplier, double bonus, String socsec) throws RemoteException
{
System.out.println ("CB : getbonus");

Bonus4 theBonus = null;

try
{
InitialContext ctx = new InitialContext();
Object objref = ctx.lookup ("bonusjndi");

bonushome = (Bonus4Home) PortableRemoteObject.narrow (objref, Bonus4Home.class);
theBonus = bonushome.create (socsec, bonus, multiplier);
} // try
catch (Exception e)
{
e.printStackTrace();
}

return theBonus;

}

public Bonus4 getRecord (String socsec) throws RemoteException
{
System.out.println ("CB : getsocsec");

Bonus4 record = null;

try 
{
record = bonushome.findByPrimaryKey (socsec);
} // try
catch (Exception e)
{
e.printStackTrace();
}

return record;
}
}

The above is session bean. The client invokes the calcBonus() method and this method creates an instance of Entity Bean, the code given as follows.

package myj2ee4;
import java.rmi.RemoteException;
import javax.ejb.EntityBean;
import javax.ejb.EntityContext;
import java.sql.*;
import javax.ejb.CreateException;

public class Bonus4Bean implements EntityBean
{
public String socSec = null;
public double bonus;
public int multiplier;
public EntityContext ctx;

public String ejbCreate (String socsec, double bonus, int multiplier) throws RemoteException, CreateException
{
System.out.println ("BB : ejbCreate()");
this.socSec = socsec;
this.bonus = bonus;
this.multiplier = multiplier;

return " ";
}

public void ejbPostCreate (String socsec, double bonus, int multiplier) throws RemoteException
{
System.out.println ("BB : ejbPostCreate()");
}

public void setEntityContext (EntityContext ctx)
{
System.out.println ("BB : setEntityContext()");
this.ctx = ctx;
}

public void unsetEntityContext()
{
System.out.println ("BB : unset");
this.ctx = null;
}

public void ejbActivate() throws RemoteException
{
System.out.println ("BB : ejbActivate()");
}

public void ejbLoad() throws RemoteException
{
System.out.println ("BB : ejbLoad()");
}

public void ejbPassivate() throws RemoteException
{
System.out.println ("BB : ejbPassivate()");
}

public void ejbStore() throws RemoteException
{
System.out.println ("BB : ejbStore()");
}

public void ejbRemove() throws RemoteException
{
System.out.println ("BB : ejbremove()");
}

public double getBonus() throws RemoteException
{
System.out.println ("BB : getb()");
return this.bonus;
}

public String getSocSec() throws RemoteException
{
System.out.println ("BB : getsocsec()");
return this.socSec;
}
}

Also refer : http://www.javaranch.com/ubb/Forum11/HTML/000594.html
The link mentioned in the above has examples with various combinations of J2EE technologies.
HTH