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12 Apr 2021 00:08:29 UTC
- Distribution: Log-Agent
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NAME
Log::Agent::Tag::Callback - a dynamic tag string
SYNOPSIS
require Log::Agent::Tag::Callback; # Inherits from Log::Agent::Tag. my $tag = Log::Agent::Tag::Callback->make( -name => "session id", -callback => Callback->new($obj, 'method', @args), -postfix => 1, -separator => " -- ", );
DESCRIPTION
This class represents a dynamic tag string, whose value is determined by invoking a pre-determined callback, which is described by a
Callback
object.You need to make your application depend on the
Callback
module from CPAN if you make use of this tagging feature, sinceLog::Agent
does not depend on it, on purpose (it does not really use it, it only offers an interface to plug it in). At least version 1.02 must be used.CREATION ROUTINE PARAMETERS
The following parameters are defined, in alphabetical order:
-callback
=>Callback
object-
The callback to invoke to determine the value of the tag. The call is protected via a busy flag, in case there is an unwanted recursion due to a call to one of the logging routines whilst within the callback.
If the callback is busy, the tag emitted is:
callback "user" busy
assuming
user
is the name you supplied via-name
for this tag. -name
=> name-
The name of this tag. Used to flag a callback as busy in case there is an unwanted recursion into the callback routine.
-postfix
=> flag-
Whether tag should be placed after or before the log message. By default, it is prepended to the log message, i.e. this parameter is false.
-separator
=> string-
The separation string between the tag and the log message. A single space by default.
AUTHOR
Raphael Manfredi <Raphael_Manfredi@pobox.com>
SEE ALSO
Callback(3), Log::Agent::Tag(3), Log::Agent::Message(3).
Module Install Instructions
To install Log::Agent, copy and paste the appropriate command in to your terminal.
cpanm Log::Agent
perl -MCPAN -e shell install Log::Agent
For more information on module installation, please visit the detailed CPAN module installation guide.