EJB VS JDO

[Pardha Akalamkam]

Hi Kathy/Bert
With a lot of hype and enthu over JDO do you think EJB technology would sustain for a long time.Is it advisable to buy the book "head First EJB" and study for SCBCD. What is your opinion about EJB's future against JDO.

Pardha
SCJP
SCWCD

[viswanadh kasinadhuni]

I think EJBJDO Integration is on the way....(Stateless Session EJB and JDO Persistance)...anyhow you should be thorough with both and becoming scbcd is an advantage. I think I will buy this book. but still amazon is having preorder item link rather buy link on the book page.

[Surasak Leenapongpanit]

This link has many good opinions about EJB's future against JDO
URL=http://www.theserverside.com/home/thread.jsp?thread_id=19470&article_count=18]http://www.theserverside.com/home/thread.jsp?thread_id=19470&article_count=18[/URL]

[Pradeep bhatt]

https://coderanch.com/t/310557/EJB-JEE/java/Entity-vs-JDO

[Rishi Singh]

Hi All,
I am of the opinion that Sun is going to introduce the integration of JDO in the EJB specs very soon and it would co-exist along with Entity beans.
So there is no harm in getting this SCBCD cert in your kitty and in a longer run it would make one wise enough to decide between either to use Entity Beans or JDO..
Rishi

[krithika desai]

Originally posted by Pardha Akalamkam:
Hi Kathy/Bert
With a lot of hype and enthu over JDO do you think EJB technology would sustain for a long time.Is it advisable to buy the book "head First EJB" and study for SCBCD. What is your opinion about EJB's future against JDO.
Pardha
SCJP
SCWCD

from what I infer from the posts in the forums,
EJB = entity + stateful session + stateless session + message driven bean.
winners --> stateless session beans & message driven beans
losers --> entity beans + stateful session beans.

[Pradeep bhatt]

EJB has a good future. Entity beans overhead and persitent frame work are little lacking. JDO can be used with entity beans.

[krithika desai]

Originally posted by Pradeep Bhat:
EJB has a good future. Entity beans overhead and persitent frame work are little lacking. JDO can be used with entity beans.

ok I fail to understand this. It might be very basic. Will using JDO to provide CMP implementation improve performance drastically? What is it that brings down Entity bean performance?. The life cycle? , the way callback methods work? Guess it has to be. Ultimately SQLs have to run in the background. I have a feeling that what needs to happen in the ejbLoad and ejbStore , callback method calls brings down the performance?
If that is he case, how w'd using JDO improve performance.
If this is complicated, this is my actual question:
What is it that is there in the spec that brings down the entity bean performance?

[Pradeep bhatt]

Sorry for the typo! I was talking about using JDO with session beans.
http://www.onjava.com/pub/a/onjava/2003/05/21/jdo.html
[ October 29, 2003: Message edited by: Pradeep Bhat ]

[Pradeep bhatt]

https://coderanch.com/t/298845/JDBC/java/JDO-EJBs
[ October 29, 2003: Message edited by: Pradeep Bhat ]