Log::Log4perl::Appender::Limit - Limit message delivery via block period
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");
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
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).
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.
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
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
If the appender attached to
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!).
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 2002-2009 by Mike Schilli <firstname.lastname@example.org> and Kevin Goess <email@example.com>.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.