Does hibernate locks main thread?

Question

I'm using hibernate together with apache mina to build Multiplayer game server. I have separate client class for each (apache mina) client, separate transaction and session.
So, the question is:

Does hibernate blocks my main thread when i'm saving my entity to database or performing huge select query?

"Blocks" and "locks" are two very different things. Which are you asking? — markspace, Feb 16 '16 at 19:05
I mean lock i think. I don't want to have any delay with syncing player movements — Ruslan Devsaider, Feb 16 '16 at 19:07

score 0 · Accepted Answer · answered Feb 16 '16 at 19:17

0

Yes, your JDBC calls are synchronous so they will block until something is returned from the database, this is not specific to Hibernate.

You could create a separate thread and handle your DB actions using that. Be warned though you will run into issues sharing entities across threads such as fetching lazy relationships.

answered Feb 16 '16 at 19:17

francis

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Whoa. Seriously, there are issue in Hibernate with sharing entities across threads? Could point to documentation on that? – markspace Feb 17 '16 at 15:56
@markspace Sessions are not thread safe, though reattaching entities is not impossible. For write operations where you do not care about the result you won't have an issue. https://pveentjer.wordpress.com/2007/02/19/sharing-hibernate-entities-between-threads/, http://stackoverflow.com/questions/32549386/modifying-hibernate-entities-from-multiple-threads – francis Feb 17 '16 at 19:16

Does hibernate locks main thread?

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