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ejbLoad and ejbStore

simon khor
Greenhorn

Joined: Oct 02, 2002
Posts: 3
Please help.....
Using EJB version 1.1.
- Session Bean (Stateless)
- BMP
- DAO
This are the following step that i follow:-
1. Call ejbFindByPrimaryKey(key).
2. EJB container call ejbLoad().
The problem occur after calling the ejbLoad() where the container will call the ejbStore().
as what i know is, this ejbStore() method is use for update a record in the database.
In this case i just want to get a record of a particular user detail and display it on the jsp, i'm not doing any updating at all.
The question here is, is this the actual way of retrieving a record using a EJB, where once SELECT the record from database then update the record that we just retrieve before display it in JSP.I can't figure out how to avoid calling the ejbLoad().I did refer to the Pet Store 1.1.2. It make me even more confuse.
Any Suggestion.Thank in advance.
best regard,
simon khor
[ October 23, 2002: Message edited by: simon khor ]
Dave Coombes
Greenhorn

Joined: Nov 06, 2001
Posts: 19
Depending on which app server you are using, some (certainly Websphere does) let you indicate whether bean methods are read only and the container can then make optimizations by not calling ejbStore on bean instances which have only had read-only methods called on them.
Alternatively, as you are using BMP, you implement the ejbStore method so you can employ strategies to optimize this such as the Dirty Marker pattern described in the Core J2EE patterns book.
Hope this helps
 
It is sorta covered in the JavaRanch Style Guide.
 
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