log::log4perl::appender::socket(3pm) [debian man page]
Appender::Socket(3pm) User Contributed Perl Documentation Appender::Socket(3pm) NAME
Log::Log4perl::Appender::Socket - Log to a socket SYNOPSIS
use Log::Log4perl::Appender::Socket; my $appender = Log::Log4perl::Appender::Socket->new( PeerAddr => "server.foo.com", PeerPort => 1234, ); $appender->log(message => "Log me "); DESCRIPTION
This is a simple appender for writing to a socket. It relies on IO::Socket::INET and offers all parameters this module offers. Upon destruction of the object, pending messages will be flushed and the socket will be closed. If the appender cannot contact the server during the initialization phase (while running the constructor "new"), it will "die()". If the appender fails to log a message because the socket's "send()" method fails (most likely because the server went down), it will try to reconnect once. If it succeeds, the message will be sent. If the reconnect fails, a warning is sent to STDERR and the "log()" method returns, discarding the message. If the option "silent_recovery" is given to the constructor and set to a true value, the behaviour is different: If the socket connection can't be established at initialization time, a single warning is issued. Every log attempt will then try to establish the connection and discard the message silently if it fails. If you don't even want the warning, set the "no_warning" option to a true value. Connecting at initialization time may not be the best option when running under Apache1 Apache2/prefork, because the parent process creates the socket and the connections are shared among the forked children--all the children writing to the same socket could intermingle messages. So instead of that, you can use "defer_connection" which will put off making the connection until the first log message is sent. EXAMPLE
Write a server quickly using the IO::Socket::INET module: use IO::Socket::INET; my $sock = IO::Socket::INET->new( Listen => 5, LocalAddr => 'localhost', LocalPort => 12345, Proto => 'tcp'); while(my $client = $sock->accept()) { print "Client connected "; while(<$client>) { print "$_ "; } } Start it and then run the following script as a client: use Log::Log4perl qw(:easy); my $conf = q{ log4perl.category = WARN, Socket log4perl.appender.Socket = Log::Log4perl::Appender::Socket log4perl.appender.Socket.PeerAddr = localhost log4perl.appender.Socket.PeerPort = 12345 log4perl.appender.Socket.layout = SimpleLayout }; Log::Log4perl->init($conf); sleep(2); for(1..10) { ERROR("Quack!"); sleep(5); } COPYRIGHT AND LICENSE
Copyright 2002-2009 by Mike Schilli <m@perlmeister.com> and Kevin Goess <cpan@goess.org>. This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.10.1 2010-07-21 Appender::Socket(3pm)
Check Out this Related Man Page
Appender::Limit(3) User Contributed Perl Documentation Appender::Limit(3) NAME
Log::Log4perl::Appender::Limit - Limit message delivery via block period SYNOPSIS
use Log::Log4perl qw(:easy); my $conf = qq( log4perl.category = WARN, Limiter # Email appender log4perl.appender.Mailer = Log::Dispatch::Email::MailSend log4perl.appender.Mailer.to = drone@pageme.com log4perl.appender.Mailer.subject = Something's broken! log4perl.appender.Mailer.buffered = 0 log4perl.appender.Mailer.layout = PatternLayout log4perl.appender.Mailer.layout.ConversionPattern=%d %m %n # Limiting appender, using the email appender above log4perl.appender.Limiter = Log::Log4perl::Appender::Limit log4perl.appender.Limiter.appender = Mailer log4perl.appender.Limiter.block_period = 3600 ); Log::Log4perl->init($conf); WARN("This message will be sent immediately"); WARN("This message will be delayed by one hour."); sleep(3601); WARN("This message plus the last one will be sent now"); DESCRIPTION
"appender" Specifies the name of the appender used by the limiter. The appender specified must be defined somewhere in the configuration file, not necessarily before the definition of "Log::Log4perl::Appender::Limit". "block_period" Period in seconds between delivery of messages. If messages arrive in between, they will be either saved (if "accumulate" is set to a true value) or discarded (if "accumulate" isn't set). "persistent" File name in which "Log::Log4perl::Appender::Limit" persistently stores delivery times. If omitted, the appender will have no recollection of what happened when the program restarts. "max_until_flushed" Maximum number of accumulated messages. If exceeded, the appender flushes all messages, regardless if the interval set in "block_period" has passed or not. Don't mix with "max_until_discarded". "max_until_discarded" Maximum number of accumulated messages. If exceeded, the appender will simply discard additional messages, waiting for "block_period" to expire to flush all accumulated messages. Don't mix with "max_until_flushed". If the appender attached to "Limit" uses "PatternLayout" with a timestamp specifier, you will notice that the message timestamps are reflecting the original log event, not the time of the message rendering in the attached appender. Major trickery has been applied to accomplish this (Cough!). DEVELOPMENT NOTES
"Log::Log4perl::Appender::Limit" is a composite appender. Unlike other appenders, it doesn't log any messages, it just passes them on to its attached sub-appender. For this reason, it doesn't need a layout (contrary to regular appenders). If it defines none, messages are passed on unaltered. Custom filters are also applied to the composite appender only. They are not applied to the sub-appender. Same applies to appender thresholds. This behaviour might change in the future. COPYRIGHT AND LICENSE
Copyright 2002-2009 by Mike Schilli <m@perlmeister.com> and Kevin Goess <cpan@goess.org>. This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.12.1 2010-02-16 Appender::Limit(3)