Hmm, interesting. I wasn't aware of this so I did some research.
The question is discussed here:
http://stackoverflow.com/questions/464784/java-reentrantreadwritelocks-how-to-safely-acquire-write-lock
And there is an implementation here:
http://tutorials.jenkov.com/java-concurrency/read-write-loc
Hi,
> May I ask how it's currently implemented? Wait/notify?
Yes. java.util.concurrent can't be used because it doesn't support lock upgrade.
Regards,
Thomas
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On Sep 20, 2011, at 8:09 AM, Thomas Mueller wrote:
> Currently, locking is not fair.
Thanks, Thomas.
May I ask how it's currently implemented? Wait/notify?
Thanks,
-hendrik
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Hi,
Currently, locking is not fair.
Regards,
Thomas
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Hi,
I am wondering whether H2 table locking (not MVCC, but the regular
variant) is fair in the sense that, if one transaction locks a table
for a while, are other transactions/sessions queued in the order they
are trying to attempt to lock the table themselves?
So that, when the first
Hi,
Did you already read the documentation at
http://h2database.com/html/advanced.html#transaction_isolation ? The
documentation is not complete, I will add:
= Read Committed =
Read locks are released immediately after executing the statement, but
write locks are kept until the transaction commit
On Jun 23, 12:33 pm, Sergi Vladykin
wrote:
> > > I assume that once I commit, another waiting connection will be able
> > > to obtain the lock.
> > > Will it be *any* waiting connection or will it be the connection that
> > > has been waiting longest (FIFO)?
>
> > This one I'm still wondering abou
Hi,
On 23 июн, 13:08, hendrik wrote:
> On Jun 23, 9:56 am, hendrik wrote:
>
> > Say, I start a transaction on a table, then select and update some
> > stuff on it. For that it will be locked.
> > Now my guess is, H2 will only unlock the table once I commit or
> > rollback the transaction.
>
> >
On Jun 23, 9:56 am, hendrik wrote:
> Say, I start a transaction on a table, then select and update some
> stuff on it. For that it will be locked.
> Now my guess is, H2 will only unlock the table once I commit or
> rollback the transaction.
>
> Correct?
Did some more reading.. seems like my assum
Hi,
please excuse the rather general question, but I figured I might as
well ask here as I'm using H2.
Basically, my question is when are tables locked and unlocked?
Say, I start a transaction on a table, then select and update some
stuff on it. For that it will be locked.
Now my guess is, H2 wi
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