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From: Judd T. <ju...@or...> - 2006-10-11 15:47:04
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I'm thinking about using log4perl as an alternative to my current object logging system, but I'm not sure how it will handle a situation where I need to append to a master logfile from several processes at the same time. I need to append to this log from several programs, some of which are multi-threaded (fork) servers, as well as from several of the same programs at the same time. Avoiding conflicts where messages are lost, and atomicity are pretty critical. I also want to centralize the configuration for all clients in one place. Is this going to be easy with log4perl? What relevant docs should I be looking at first? I need something like this running pretty shortly, and my only alternative would be to write a forking Net::Server thing to handle the incoming requests. Getting something like that reliable will probably not be a quick thing... Thanks, Judd -- ____________________________ Judd Taylor Software Engineer Orbital Systems, Ltd. 8304 Esters Blvd, Suite 870 Irving, TX 75063-2209 ju...@or... (469) 442-1767 x127 |
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From: Mike S. <m...@pe...> - 2006-10-11 18:23:20
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On Wed, 11 Oct 2006, Judd Taylor wrote:
> I'm thinking about using log4perl as an alternative to my current object
> logging system, but I'm not sure how it will handle a situation where I
> need to append to a master logfile from several processes at the same
> time.
Log::Log4perl::Appender::Synchronized to the rescue:
http://log4perl.sourceforge.net/d/Log/Log4perl/FAQ.html#23804
-- Mike
Mike Schilli
m...@pe...
> I need to append to this log from several programs, some of which are
> multi-threaded (fork) servers, as well as from several of the same
> programs at the same time. Avoiding conflicts where messages are lost,
> and atomicity are pretty critical. I also want to centralize the
> configuration for all clients in one place.
>
> Is this going to be easy with log4perl? What relevant docs should I be
> looking at first?
>
> I need something like this running pretty shortly, and my only
> alternative would be to write a forking Net::Server thing to handle the
> incoming requests. Getting something like that reliable will probably
> not be a quick thing...
>
> Thanks,
> Judd
>
>
>
>
> --
> ____________________________
> Judd Taylor
> Software Engineer
>
> Orbital Systems, Ltd.
> 8304 Esters Blvd, Suite 870
> Irving, TX 75063-2209
>
> ju...@or...
> (469) 442-1767 x127
>
>
> -------------------------------------------------------------------------
> Using Tomcat but need to do more? Need to support web services, security?
> Get stuff done quickly with pre-integrated technology to make your job easier
> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
> http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> _______________________________________________
> log4perl-devel mailing list
> log...@li...
> https://lists.sourceforge.net/lists/listinfo/log4perl-devel
>
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From: Judd T. <ju...@or...> - 2006-10-17 19:35:02
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Ok, I've got the basic version of Log4perl::Appender::Synchronized running, but I'm running into a problem where the IPC::Shareable semaphores are created without group permissions. This causes apps starting with a different user to crash, as they don't have the correct permissions to be messing with those semaphores. Looking at the Synchronized.pm file, it shows an arg to new(), %options, that is passed to IPC::Shareable tie() call. That would be an ideal place to stick on the Mode => '775' option. How can I define options to the constructor, if it's only init'd with a call to read a config file (i.e. how can I pass the options through the config file)? Thanks, Judd On Wed, 2006-10-11 at 11:22 -0700, Mike Schilli wrote: > On Wed, 11 Oct 2006, Judd Taylor wrote: > > > I'm thinking about using log4perl as an alternative to my current object > > logging system, but I'm not sure how it will handle a situation where I > > need to append to a master logfile from several processes at the same > > time. > > Log::Log4perl::Appender::Synchronized to the rescue: > > http://log4perl.sourceforge.net/d/Log/Log4perl/FAQ.html#23804 > > -- Mike > > Mike Schilli > m...@pe... > > > I need to append to this log from several programs, some of which are > > multi-threaded (fork) servers, as well as from several of the same > > programs at the same time. Avoiding conflicts where messages are lost, > > and atomicity are pretty critical. I also want to centralize the > > configuration for all clients in one place. > > > > Is this going to be easy with log4perl? What relevant docs should I be > > looking at first? > > > > I need something like this running pretty shortly, and my only > > alternative would be to write a forking Net::Server thing to handle the > > incoming requests. Getting something like that reliable will probably > > not be a quick thing... > > > > Thanks, > > Judd > > > > > > > > > > -- > > ____________________________ > > Judd Taylor > > Software Engineer > > > > Orbital Systems, Ltd. > > 8304 Esters Blvd, Suite 870 > > Irving, TX 75063-2209 > > > > ju...@or... > > (469) 442-1767 x127 > > > > > > ------------------------------------------------------------------------- > > Using Tomcat but need to do more? Need to support web services, security? > > Get stuff done quickly with pre-integrated technology to make your job easier > > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > > _______________________________________________ > > log4perl-devel mailing list > > log...@li... > > https://lists.sourceforge.net/lists/listinfo/log4perl-devel > > > -- ____________________________ Judd Taylor Software Engineer Orbital Systems, Ltd. 8304 Esters Blvd, Suite 870 Irving, TX 75063-2209 ju...@or... (469) 442-1767 x127 |
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From: Mike S. <m...@pe...> - 2006-10-17 21:14:55
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On Tue, 17 Oct 2006, Judd Taylor wrote:
> Looking at the Synchronized.pm file, it shows an arg to new(), %options,
> that is passed to IPC::Shareable tie() call. That would be an ideal
> place to stick on the Mode => '775' option.
>
> How can I define options to the constructor, if it's only init'd with a
> call to read a config file (i.e. how can I pass the options through the
> config file)?
You can pass the IPC::Shareable options hash this way:
use Log::Log4perl qw(:easy);
my $conf = q[
log4perl.category = DEBUG, Syncer1
# Screen appender 1 (unsynchronized)
log4perl.appender.Screen = Log::Log4perl::Appender::Screen
log4perl.appender.Screen.layout = SimpleLayout
# Synchronizing appender, using the file appender above
log4perl.appender.Syncer1 = Log::Log4perl::Appender::Synchronized
log4perl.appender.Syncer1.appender = Screen
log4perl.appender.Syncer1.options = \
sub { { create=>1, destroy=>1, mode=>0775 } }
log4perl.appender.Syncer1.key = l4p1
];
Log::Log4perl->init(\$conf);
DEBUG "foo!";
-- Mike
Mike Schilli
m...@pe...
>
> Thanks,
> Judd
>
> Ok, I've got the basic version of Log4perl::Appender::Synchronized
> running, but I'm running into a problem where the IPC::Shareable
> semaphores are created without group permissions.
>
> This causes apps starting with a different user to crash, as they don't
> have the correct permissions to be messing with those semaphores.
>
>
> On Wed, 2006-10-11 at 11:22 -0700, Mike Schilli wrote:
> > On Wed, 11 Oct 2006, Judd Taylor wrote:
> >
> > > I'm thinking about using log4perl as an alternative to my current object
> > > logging system, but I'm not sure how it will handle a situation where I
> > > need to append to a master logfile from several processes at the same
> > > time.
> >
> > Log::Log4perl::Appender::Synchronized to the rescue:
> >
> > http://log4perl.sourceforge.net/d/Log/Log4perl/FAQ.html#23804
> >
> > -- Mike
> >
> > Mike Schilli
> > m...@pe...
> >
> > > I need to append to this log from several programs, some of which are
> > > multi-threaded (fork) servers, as well as from several of the same
> > > programs at the same time. Avoiding conflicts where messages are lost,
> > > and atomicity are pretty critical. I also want to centralize the
> > > configuration for all clients in one place.
> > >
> > > Is this going to be easy with log4perl? What relevant docs should I be
> > > looking at first?
> > >
> > > I need something like this running pretty shortly, and my only
> > > alternative would be to write a forking Net::Server thing to handle the
> > > incoming requests. Getting something like that reliable will probably
> > > not be a quick thing...
> > >
> > > Thanks,
> > > Judd
> > >
> > >
> > >
> > >
> > > --
> > > ____________________________
> > > Judd Taylor
> > > Software Engineer
> > >
> > > Orbital Systems, Ltd.
> > > 8304 Esters Blvd, Suite 870
> > > Irving, TX 75063-2209
> > >
> > > ju...@or...
> > > (469) 442-1767 x127
> > >
> > >
> > > -------------------------------------------------------------------------
> > > Using Tomcat but need to do more? Need to support web services, security?
> > > Get stuff done quickly with pre-integrated technology to make your job easier
> > > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
> > > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
> > > _______________________________________________
> > > log4perl-devel mailing list
> > > log...@li...
> > > https://lists.sourceforge.net/lists/listinfo/log4perl-devel
> > >
> >
> --
> ____________________________
> Judd Taylor
> Software Engineer
>
> Orbital Systems, Ltd.
> 8304 Esters Blvd, Suite 870
> Irving, TX 75063-2209
>
> ju...@or...
> (469) 442-1767 x127
>
>
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