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Re: (Java) Synchronizing multiple app servers through Oracle

From: <chrism778_at_gmail.com>
Date: Wed, 12 Dec 2007 18:04:44 -0800 (PST)
Message-ID: <891f1536-701e-4046-8769-96c5662ec7ed@b40g2000prf.googlegroups.com>


On Dec 12, 8:33 pm, Steve Howard <stevedhow..._at_gmail.com> wrote:
> On Dec 12, 8:10 pm, chrism..._at_gmail.com wrote:
>
> > What is the recommended way for using an Oracle database to
> > synchronize multiple app servers? When I speak of synchronizing, I'm
> > referring to the Java use of the word, where you can lock a section of
> > code so other threads don't access that section at the same time.
>
> > I have multiple app servers that each need exclusive access to the
> > database for a certain operation. Does Oracle have a semaphore
> > utility that is available to apps? I know I could hack it by doing a
> > select for update on a dummy table with 1 row, but I was hoping Oracle
> > had something more elegant to use.
>
> > Thanks.
>
> Hi,
>
> Oracle locks rows by default (it doesn't matter if it's java, C#, VB,
> C, SQL*Plus, etc.), but I don't know what you mean "exclusive access
> to the database for a certain operation". If you have a need for more
> sophisticated application locking, look into the procedures in the
> dbms_lock package at tahiti.oracle.com
>
> HTH,
>
> Steve

dbms_lock sounds like exactly what I'm looking for. It doesn't appear to be part of Oracle 10g (the version I'm using). Is it downloadable from the Oracle web site? I didn't find it my first try.

Thanks. Received on Wed Dec 12 2007 - 20:04:44 CST

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