Mailing-List: contact users-help@tomcat.apache.org; run by ezmlm
Precedence: bulk
Reply-To: "Tomcat Users List" <users@tomcat.apache.org>
Received-SPF: pass (nike.apache.org: domain of Chuck.Caldarale@unisys.com
 designates 216.82.254.211 as permitted sender)
From: "Caldarale, Charles R" <Chuck.Caldarale@unisys.com>
To: Tomcat Users List <users@tomcat.apache.org>
Date: Fri, 1 Jun 2012 11:23:11 -0500
Subject: RE: Question about resetting datasources and changes to the
 BasicDataSource.close() method
Thread-Topic: Question about resetting datasources and changes to the
 BasicDataSource.close() method
Thread-Index: Ac1AEh5C9AeSlv9jRCizCl0kZvaNGQAAF11g
Message-ID: 
 <99C8B2929B39C24493377AC7A121E21FB028D31026@USEA-EXCH8.na.uis.unisys.com>
References: <Ac0+mtRSTPXDQoGAQN6besloJcfM8A==>
 <30A8B1E10B6694429B87D8D9FBF45C8E024EB9EC8261@Exchange02.rainhail.com>
 <CABzHfV=KPMdN59wGXGAH2rSM4OhB3fVpZ9AjVeeYhpKu47CNVQ@mail.gmail.com>
 <30A8B1E10B6694429B87D8D9FBF45C8E024EB9EC8270@Exchange02.rainhail.com>
 <4FC7C5F2.2000007@christopherschultz.net>
 <30A8B1E10B6694429B87D8D9FBF45C8E024EB9EC828A@Exchange02.rainhail.com>
 <4FC7EF38.2090006@christopherschultz.net>
 <30A8B1E10B6694429B87D8D9FBF45C8E024EB9EC8298@Exchange02.rainhail.com>
 <4FC8EB18.4040106@christopherschultz.net>
In-Reply-To: <4FC8EB18.4040106@christopherschultz.net>
Accept-Language: en-US
Content-Language: en-US
acceptlanguage: en-US
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0

> From: Christopher Schultz [mailto:chris@christopherschultz.net]=20
> Subject: Re: Question about resetting datasources and changes to the Basi=
cDataSource.close() method

> Locking "this" makes sure that the thread's local copy of
> whatever-you-are-getting is updated properly and not stale-cached. If
> you synchronize the setter, it is a very good idea to synchronize the
> getter too.

Also, unless you're absolutely certain that the entity being retrieved is a=
 primitive type, you must synchronize to insure that the structure you're f=
iddling with is not in an undefined state.

 - Chuck


THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MA=
TERIAL and is thus for use only by the intended recipient. If you received =
this in error, please contact the sender and delete the e-mail and its atta=
chments from all computers.


---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org