1MooseX::Log::Log4perl(3U)ser Contributed Perl DocumentatiMoonoseX::Log::Log4perl(3)
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NAME

6       MooseX::Log::Log4perl - A Logging Role for Moose based on Log::Log4perl
7

SYNOPSIS

9           package MyApp;
10           use Moose;
11
12           with 'MooseX::Log::Log4perl';
13
14           sub something {
15               my ($self) = @_;
16               $self->log->debug("started bar");    ### logs with default class catergory "MyApp"
17               ...
18               $self->log('special')->info('bar');  ### logs with category "special"
19               ...
20               $self->log('.special')->info('bar'); ### logs with category "MyApp.special"
21               $self->log('::special')->info('bar');### logs with category "MyApp.special"
22           }
23

DESCRIPTION

25       A logging role building a very lightweight wrapper to Log::Log4perl for
26       use with your Moose or Moo classes.  The initialization of the Log4perl
27       instance must be performed prior to logging the first log message.
28       Otherwise the default initialization will happen, probably not doing
29       the things you expect.
30
31       For compatibility the "logger" attribute can be accessed to use a
32       common interface for application logging.
33
34       Using the logger within a class is as simple as consuming a role:
35
36           package MyClass;
37           use Moose;
38           with 'MooseX::Log::Log4perl';
39
40           sub dummy {
41               my $self = shift;
42               $self->log->info("Dummy log entry");
43           }
44
45       The logger needs to be setup before using the logger, which could
46       happen in the main application:
47
48           package main;
49           use Log::Log4perl qw(:easy);
50           use MyClass;
51
52           BEGIN { Log::Log4perl->easy_init() };
53
54           my $myclass = MyClass->new();
55           $myclass->log->info("In my class"); # Access the log of the object
56           $myclass->dummy;                    # Will log "Dummy log entry"
57

EVEN SIMPLER USE

59       For simple logging needs use MooseX::Log::Log4perl::Easy to directly
60       add log_<level> methods to your class instance.
61
62           $self->log_info("Dummy");
63

USING WITH MOO INSTEAD OF MOOSE

65       As this module is using Moo, you can use it with Moo instead of Moose
66       too.
67
68       This will allow to simple use it as documented above in a Moo based
69       application, like shown in the example below:
70
71       This is your class consuming the MooseX::Log::Log4perl role.
72
73           package MyCat;
74           use Moo;
75
76           with 'MooseX::Log::Log4perl';
77
78           sub catch_it {
79               my $self = shift;
80               $self->log->debug("Say Miau");
81           }
82
83       Which can be simply used in your main application then.
84
85           package main;
86           use MyCat;
87           use Log::Log4perl qw(:easy);
88           BEGIN { Log::Log4perl->easy_init() };
89
90           my $log = Log::Log4perl->get_logger();
91           $log->info("Application startup...");
92           MyCat->new()->catch_it();   ### Will log "Dummy dodo"
93

ACCESSORS

95   logger
96       The "logger" attribute holds the Log::Log4perl object that implements
97       all logging methods for the defined log levels, such as "debug" or
98       "error". As this method is defined also in other logging roles/systems
99       like MooseX::Log::LogDispatch this can be thought of as a common
100       logging interface.
101
102         package MyApp::View::JSON;
103
104         extends 'MyApp::View';
105         with 'MooseX:Log::Log4perl';
106
107         sub bar {
108           $self->logger->info("Everything fine so far");    # logs a info message
109           $self->logger->debug("Something is fishy here");  # logs a debug message
110         }
111
112   log([$category])
113       Basically the same as logger, but also allowing to change the log
114       category for this log message. If the category starts with a "+", we
115       pre-pend the current class (what would have been the category if you
116       didn't specify one).
117
118        if ($myapp->log->is_debug()) {
119            $myapp->log->debug("Woot"); # category is class myapp
120        }
121        $myapp->log("TempCat")->info("Foobar"); # category TempCat
122        $myapp->log->info("Grumble"); # category class again myapp
123        $myapp->log(".TempCat")->info("Foobar"); # category myapp.TempCat
124        $myapp->log("::TempCat")->info("Foobar"); # category myapp.TempCat
125

SEE ALSO

127       Log::Log4perl, Moose, Moo, MooX::Log::Any, MooX::Role::Logger
128

BUGS AND LIMITATIONS

130       Please report any issues at
131       <https://github.com/lammel/moosex-log-log4perl>
132
133       Or come bother us in "#moose" on "irc.perl.org".
134

AUTHOR

136       Roland Lammel <lammel@cpan.org>
137
138       Inspired by the work by Chris Prather <perigrin@cpan.org> and Ash
139       Berlin <ash@cpan.org> on MooseX::LogDispatch
140

CONTRIBUTORS

142       In alphabetical order:
143
144       • abraxxa for Any::Moose deprectation
145
146       • Michael Schilli <m@perlmeister.com> for Log::Log4perl and interface
147         suggestions
148
149       • omega for catgory prefix support
150
151       • Tim Bunce <TIMB@cpan.org> for corrections in the
152         MooseX::Log::Log4perl::Easy module.
153

155       Copyright (c) 2008-2016, Roland Lammel <lammel@cpan.org>,
156       <http://www.quikit.at>
157
158       This module is free software; you can redistribute it and/or modify it
159       under the same terms as Perl itself. See perlartistic.
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163perl v5.34.0                      2022-01-21          MooseX::Log::Log4perl(3)
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