J2ee Ejb specification 2.0

Hi,
The latest Specifications for EJB 2.0 available on Sun's site talks about Entity Bean - bean managed persistance in Chapter 12 (page 257 - 258), where it states that
Bean Method bean method can
perform operations
-------------------------------------------------------ejbLoad/ejbStore Entity Context method :
getEJBHome, getEJBObject,
getcallerPrinciplal, getPrimaryKey,
getRollBackOnly, setRollBackOnly...
Business Method Entity Context method :
getEJBHome, getEJBObject,
getcallerPrinciplal,
getPrimaryKey, getRollBackOnly,
setRollBackOnly...
As per the above table, getRollBackOnly and setRollBackOnly methods can be used in different bean methods and container callback methods in Entity bean - Bean-Managed Persistence.
But as per our knowledge, the above methods can ONLY be used with Container Managed persistance beans.
Could you help me out in clearing the above confusion?
Thanks,
Gauri Tendulkar
Patni Computer Systems Ltd.
Sr. Software Engineer.

Hi!
getRollBackOnly and setRollBackOnly affects transactions of this bean, and transactios are handled by the container in any case (although you may begin and end usertransactions in the bean yourself). In the deployment-descriptor you specify how transacions should be handled for this bean (TX_REQUIRED, TX_SUPPORTED, ...)
I think even if you perform no transaction at all in the bean, you may use setRollBackOnly to mark the transaction currently open for rollback.
Hope this helps, ciao
Martin
Hi,
The latest Specifications for EJB 2.0 available on
on Sun's site talks about Entity Bean - bean managed
persistance in Chapter 12 (page 257 - 258), where it
states that
Bean Method bean method can
perform operations
jbLoad/ejbStore Entity Context method :
getEJBHome,
getEJBHome, getEJBObject,
getcallerPrinciplal,
getcallerPrinciplal, getPrimaryKey,
getRollBackOnly,
getRollBackOnly, setRollBackOnly...
Business Method Entity Context method :
getEJBHome,
getEJBHome, getEJBObject,
getcallerPrinciplal,
getcallerPrinciplal,
getPrimaryKey,
getPrimaryKey, getRollBackOnly,
setRollBackOnly...
As per the above table, getRollBackOnly and
setRollBackOnly methods can be used in different bean
methods and container callback methods in Entity bean
- Bean-Managed Persistence.
But as per our knowledge, the above methods can ONLY
be used with Container Managed persistance beans.
Could you help me out in clearing the above
confusion?
Thanks,
Gauri Tendulkar
Patni Computer Systems Ltd.
Sr. Software Engineer.

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>
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why
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and
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************calculatorHome**********
import java.io.Serializable;
import java.rmi.RemoteException;
import javax.ejb.CreateException;
import javax.ejb.EJBHome;
public interface calculatorHome extends EJBHome
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************calculator***************
import javax.ejb.EJBObject;
import java.rmi.RemoteException;
public interface calculator extends EJBObject
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**********calculatorEJB***********************
import java.rmi.RemoteException;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;
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***********************************descriptor*************
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ejb-jar PUBLIC '-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN' 'http://java.sun.com/dtd/ejb-jar_2_0.dtd'>
<ejb-jar>
<display-name>newcalculatorjar</display-name>
<enterprise-beans>
<session>
<display-name>calculatorEJB</display-name>
<ejb-name>calculatorEJB</ejb-name>
<home>calculatorHome</home>
<remote>calculator</remote>
<ejb-class>calculatorEJB</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Bean</transaction-type>
<security-identity>
<description></description>
<use-caller-identity></use-caller-identity>
</security-identity>
</session>
</enterprise-beans>
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***************************error message*****
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ejb-jar PUBLIC '-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN' 'http://java.sun.com/dtd/ejb-jar_2_0.dtd'>
<ejb-jar>
<display-name>newcalculatorjar</display-name>
<enterprise-beans>
<session>
<display-name>calculatorEJB</display-name>
<ejb-name>calculatorEJB</ejb-name>
<home>calculatorHome</home>
<remote>calculator</remote>
<ejb-class>calculatorEJB</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Bean</transaction-type>
<security-identity>
<description></description>
<use-caller-identity></use-caller-identity>
</security-identity>
</session>
</enterprise-beans>
</ejb-jar>
STATIC VERIFICATION RESULTS
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     # of Failures : 3
# of Warnings : 0
     # of Errors : 0
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     Test Name : tests.ejb.intf.remoteintf.RemoteInterfaceMatchMethodArgs
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     Test Description : For [ calculatorEJB ]
For Remote Interface [ calculator ] method [ dollorToRs ]
Error: No corresponding business method with matching arguments was found for method [ dollorToRs ].
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     Test Description : For Remote Interface [ calculator ] method [ dollorToRs ]
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     Test Assertion : Remote interface business methods have matching method return type test
     Test Description : For [ calculatorEJB ]
For Remote Interface [ calculator ] method [ dollorToRs ]
Error: No corresponding business method with matching return type was found for method [ dollorToRs ].
Thanks in advance.
Nagarajan

In EJB home you have -
public double dollorToRs (double dollars) throwsIn EJB you have -
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good
1-
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http://edocs.bea.com/wle/ejbsamp/stateles.htm
http://www.sitepoint.com/print/implement-first-ejbs
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http://home.tiscali.nl/illuminate/scbcd/My%20SCBCDE%20Study%20Notes%20-%204%20Session%20Bean%20Lifecycle.htm
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Hi,
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to stay compatible with all databases. Not all
databases support the IDENTITY field. I remember there
were some interesting discussions about other ways to
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J2ee Ejb specification 2.0

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