Keshav Prasad gurukul

Looking at your code, i see that you are explicitly managing relationship between the parent and child. You can implement relationship mapping using Hibernate only. That way it would be a better architecture. But currently i am reviewing your code

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <hibernate-mapping> <class name="savetwotablesusingset.Child" table="child"> <id name="child_id" column="child_id"> [b]<generator class="native"/> [/b] </id> <property column="parent_id" name="parent_id"/> <property column="age" name="age"/> <property column="name" name="name"/> </class> </hibernate-mapping>

change the generator class to incerment,hilo or other auto-numeric hibernate class.

Servlet was designed to be used as an Interface to be implemented on any protocol.

GenericServlet is an Abstract class and you can extends it for most of your protocol dependent fuctionalities.

HttpServlet is another Abstract class and is implemented for HTTP protocol.

Technically Servlet supports most of the commonly used protocols

Since only one Instance of Servlet is present for whole application,
We have take certain consideration while having thread safety.
Request Scoped attribute is thread safe.

You can implement SingleThreadModel interface but i recommend
you to use synchronized blocks.

Thanks Ulf Dittmer.

Deepthi wrote

I have another doubt. Are Orielly EJB3.0 textbook and Sun specs enough for preperation. Or do I have to consult any other book like EJB3.0 in Action.

both the books are good for the exam.
you can use any one of them.
Orielly EJB3.0 is best one for persistence related objectives.

Sun spec contains a everything asked in the exam
you can lower your burden by using MIKALAI ZAIKIN STUDY NOTES
which has copied all the spec pages related to exams into 250 odd pages.

to say the least avoid chapter related to Entity beans

mikalai zaikin exam study notes has copied all the chapters
required for the exam from the spec.

It is very well organised.and cover 59/61 objectives completely.

@karl
Mejb3 or ejb3IA boh are good books.
But i am new to this technology and
Was not feeling confident after
Reading Mejb3.
it was mostly the spec that helped for the
Exam.
Ejb3ia + spec is enough for the exam.

congrats nice score

Thanks...

@Mihai Radulescu
Since i have an aggrement not to disclose about the questions i see there.
I would only suggest you to go with the objectives and the spec.
Mikalai zaikin's notes(which is based on the spec)
covers all topics related to persistence.xml from the spec.

since during server crash destroy is not called
we must be prepared for this scenario and must
not depend on it completely for performing cleanup
codes.

Hi all rancher...
Today i passed scbcd 5 with 86%.
the exam was not that scary as i thought.

i would like to thank Mikalai Zaikin for his work.
His notes made it possible.
Prior to exam i have little programming experience in this technology.

I read HF EJB(2.0)...a big mistake
Then i read Mastering EJB 3.0 and
EJB 3.0 in action
then i studied mikalai zaikin notes.(covers everything we need to know)

i prepared all this in 1 month and practices no mock papers.

I have passed the scjp1.5 (94%) exam on march 12 2008.
I am not able to access certification database.
can anyone hwlp me how to register there.