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EJB calling syncronized method

 
Mike Nason
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Hello!

Does anybody knows is it allowed to call syncronized method from EjbBean(sync method in other object, not in ejb)?

My problem is the following: the database table has rows.
An operator uses GUI to get rows from db to browse, then can modify any single row(also do some other things).

Many operators are working with GUI, so 2 operators can browse the same rows, but one row can be modified by one operator only.
I use EJB to get & modify rows. My web module calls EJB to perform fetching and modification.

The problem is when EJB instance(operator1) is modifing some DB record, the other EJB instance(operator2) overwrite the changes.

The solution can be to place modification logic to syncronized method, so this method will be called from multiple EJB instances.
Is it allowed?
Any other ideas?

I use EJB 2.1.

Thanks.
 
Prabaharan Gopalan
Ranch Hand
Posts: 66
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http://www.coderanch.com/t/319884/EJB-JEE/java/EE-specifications-synchronized-keyword - does this answer your question?
 
It is sorta covered in the JavaRanch Style Guide.
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