Hi

I am thinking to evaluate Hibernate as DAO implementation for my next project.

How does Hibernate guarantee objects are synchronized with database state,
in typical enterprice situation which is many other processes, ususlly back end rocess, updates same tables?

EJB has "commit option" to handle this situation, but that kills performance.
With my knowledge, only read only objects are cachable, and others are just overhead and waste of the memory space.
How Hibernate solves this issue?

FYI, I have rsearched FAQ, but I could not find out this topic.
thanks,
Tak

Hibernate is an object/relational mapping tool. Like any multi-access datastore, you need to choose a locking method. Hibernate helps with implementing optamistic and pessamistic locking. See the documentation for how it does this.

Still not clear.
I might misunderstand the OR mapping mechanism.

When objects are updated in Hibernate, the locking would help this issue.
What about get property (read) from object?
How does hibernate guarantee the state of the object is same as the state in the database, which other processes might change the state.

Please give me a brief idea about it.
Tak