1Catalyst::Log(3)      User Contributed Perl Documentation     Catalyst::Log(3)
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NAME

6       Catalyst::Log - Catalyst Log Class
7

SYNOPSIS

9           $log = $c->log;
10           $log->debug($message);
11           $log->info($message);
12           $log->warn($message);
13           $log->error($message);
14           $log->fatal($message);
15
16           if ( $log->is_debug ) {
17                # expensive debugging
18           }
19
20       See Catalyst.
21

DESCRIPTION

23       This module provides the default, simple logging functionality for
24       Catalyst.  If you want something different set "$c->log" in your
25       application module, e.g.:
26
27           $c->log( MyLogger->new );
28
29       Your logging object is expected to provide the interface described
30       here.  Good alternatives to consider are Log::Log4Perl and
31       Log::Dispatch.
32
33       If you want to be able to log arbitrary warnings, you can do something
34       along the lines of
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36           $SIG{__WARN__} = sub { MyApp->log->warn(@_); };
37
38       however this is (a) global, (b) hairy and (c) may have unexpected side
39       effects.  Don't say we didn't warn you.
40

LOG LEVELS

42   debug
43           $log->is_debug;
44           $log->debug($message);
45
46   info
47           $log->is_info;
48           $log->info($message);
49
50   warn
51           $log->is_warn;
52           $log->warn($message);
53
54   error
55           $log->is_error;
56           $log->error($message);
57
58   fatal
59           $log->is_fatal;
60           $log->fatal($message);
61

METHODS

63   new
64       Constructor. Defaults to enable all levels unless levels are provided
65       in arguments.
66
67           $log = Catalyst::Log->new;
68           $log = Catalyst::Log->new( 'warn', 'error' );
69
70   level
71       Contains a bitmask of the currently set log levels.
72
73   levels
74       Set log levels
75
76           $log->levels( 'warn', 'error', 'fatal' );
77
78   enable
79       Enable log levels
80
81           $log->enable( 'warn', 'error' );
82
83   disable
84       Disable log levels
85
86           $log->disable( 'warn', 'error' );
87
88   is_debug
89   is_error
90   is_fatal
91   is_info
92   is_warn
93       Is the log level active?
94
95   abort
96       Should Catalyst emit logs for this request? Will be reset at the end of
97       each request.
98
99       *NOTE* This method is not compatible with other log apis, so if you
100       plan to use Log4Perl or another logger, you should call it like this:
101
102           $c->log->abort(1) if $c->log->can('abort');
103
104   autoflush
105       When enabled (default), messages are written to the log immediately
106       instead of queued until the end of the request.
107
108       This option, as well as "abort", is provided for modules such as
109       Catalyst::Plugin::Static::Simple to be able to programmatically
110       suppress the output of log messages. By turning off "autoflush"
111       (application-wide setting) and then setting the "abort" flag within a
112       given request, all log messages for the given request will be
113       suppressed. "abort" can still be set independently of turning off
114       "autoflush", however. It just means any messages sent to the log up
115       until that point in the request will obviously still be emitted, since
116       "autoflush" means they are written in real-time.
117
118       If you need to turn off autoflush you should do it like this (in your
119       main app class):
120
121           after setup_finalize => sub {
122             my $c = shift;
123             $c->log->autoflush(0) if $c->log->can('autoflush');
124           };
125
126   _send_to_log
127        $log->_send_to_log( @messages );
128
129       This protected method is what actually sends the log information to
130       STDERR.  You may subclass this module and override this method to get
131       finer control over the log output.
132
133   psgienv $env
134           $log->psgienv($env);
135
136       NOTE: This is not meant for public consumption.
137
138       Set the PSGI environment for this request. This ensures logs will be
139       sent to the right place. If the environment has a "psgix.logger", it
140       will be used. If not, we will send logs to "psgi.errors" if that
141       exists. As a last fallback, we will send to STDERR as before.
142
143   clear_psgi
144       Clears the PSGI environment attributes set by "psgienv".
145
146   meta

SEE ALSO

148       Catalyst.
149

AUTHORS

151       Catalyst Contributors, see Catalyst.pm
152

154       This library is free software. You can redistribute it and/or modify it
155       under the same terms as Perl itself.
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159perl v5.36.0                      2023-01-20                  Catalyst::Log(3)
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