… | |
… | |
2 | |
2 | |
3 | AnyEvent::Log - simple logging "framework" |
3 | AnyEvent::Log - simple logging "framework" |
4 | |
4 | |
5 | =head1 SYNOPSIS |
5 | =head1 SYNOPSIS |
6 | |
6 | |
7 | # simple use: |
7 | Simple uses: |
8 | |
8 | |
9 | use AnyEvent; |
9 | use AnyEvent; |
10 | |
10 | |
11 | AE::log debug => "hit my knee"; |
11 | AE::log debug => "hit my knee"; |
12 | AE::log warn => "it's a bit too hot"; |
12 | AE::log warn => "it's a bit too hot"; |
13 | AE::log error => "the flag was false!"; |
13 | AE::log error => "the flag was false!"; |
14 | AE::log fatal => "the bit toggled! run!"; # never returns |
14 | AE::log fatal => "the bit toggled! run!"; # never returns |
15 | |
15 | |
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16 | # available log levels in order: |
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17 | # fatal alert critical error warn note info debug trace |
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|
18 | |
16 | # "complex" use (for speed sensitive code): |
19 | "Complex" uses (for speed sensitive code): |
17 | |
20 | |
18 | use AnyEvent::Log; |
21 | use AnyEvent::Log; |
19 | |
22 | |
20 | my $tracer = AnyEvent::Log::logger trace => \$my $trace; |
23 | my $tracer = AnyEvent::Log::logger trace => \$my $trace; |
21 | |
24 | |
22 | $tracer->("i am here") if $trace; |
25 | $tracer->("i am here") if $trace; |
23 | $tracer->(sub { "lots of data: " . Dumper $self }) if $trace; |
26 | $tracer->(sub { "lots of data: " . Dumper $self }) if $trace; |
24 | |
27 | |
25 | # configuration: |
28 | Configuration (also look at the EXAMPLES section): |
26 | |
29 | |
27 | # set logging for the current package to errors and higher only |
30 | # set logging for the current package to errors and higher only |
28 | AnyEvent::Log::ctx->level ("error"); |
31 | AnyEvent::Log::ctx->level ("error"); |
29 | |
32 | |
30 | # set logging level to suppress anything below "notice" |
33 | # set logging level to suppress anything below "notice" |
… | |
… | |
32 | |
35 | |
33 | # send all critical and higher priority messages to syslog, |
36 | # send all critical and higher priority messages to syslog, |
34 | # regardless of (most) other settings |
37 | # regardless of (most) other settings |
35 | $AnyEvent::Log::COLLECT->attach (new AnyEvent::Log::Ctx |
38 | $AnyEvent::Log::COLLECT->attach (new AnyEvent::Log::Ctx |
36 | level => "critical", |
39 | level => "critical", |
37 | log_to_syslog => 0, |
40 | log_to_syslog => "user", |
38 | ); |
41 | ); |
39 | |
|
|
40 | # see also EXAMPLES, below |
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|
41 | |
42 | |
42 | =head1 DESCRIPTION |
43 | =head1 DESCRIPTION |
43 | |
44 | |
44 | This module implements a relatively simple "logging framework". It doesn't |
45 | This module implements a relatively simple "logging framework". It doesn't |
45 | attempt to be "the" logging solution or even "a" logging solution for |
46 | attempt to be "the" logging solution or even "a" logging solution for |
… | |
… | |
51 | will be logged, unless you set C<PERL_ANYEVENT_VERBOSE> to a higher number |
52 | will be logged, unless you set C<PERL_ANYEVENT_VERBOSE> to a higher number |
52 | before starting your program, or change the logging level at runtime with |
53 | before starting your program, or change the logging level at runtime with |
53 | something like: |
54 | something like: |
54 | |
55 | |
55 | use AnyEvent::Log; |
56 | use AnyEvent::Log; |
56 | AnyEvent::Log::FILTER->level ("info"); |
57 | $AnyEvent::Log::FILTER->level ("info"); |
57 | |
58 | |
58 | The design goal behind this module was to keep it simple (and small), |
59 | The design goal behind this module was to keep it simple (and small), |
59 | but make it powerful enough to be potentially useful for any module, and |
60 | but make it powerful enough to be potentially useful for any module, and |
60 | extensive enough for the most common tasks, such as logging to multiple |
61 | extensive enough for the most common tasks, such as logging to multiple |
61 | targets, or being able to log into a database. |
62 | targets, or being able to log into a database. |
62 | |
63 | |
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64 | The module is also usable before AnyEvent itself is initialised, in which |
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65 | case some of the functionality might be reduced. |
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66 | |
63 | The amount of documentation might indicate otherwise, but the module is |
67 | The amount of documentation might indicate otherwise, but the runtime part |
64 | still just below 300 lines of code. |
68 | of the module is still just below 300 lines of code. |
65 | |
69 | |
66 | =head1 LOGGING LEVELS |
70 | =head1 LOGGING LEVELS |
67 | |
71 | |
68 | Logging levels in this module range from C<1> (highest priority) to C<9> |
72 | Logging levels in this module range from C<1> (highest priority) to C<9> |
69 | (lowest priority). Note that the lowest numerical value is the highest |
73 | (lowest priority). Note that the lowest numerical value is the highest |
… | |
… | |
83 | 8 debug |
87 | 8 debug |
84 | 9 trace |
88 | 9 trace |
85 | |
89 | |
86 | As you can see, some logging levels have multiple aliases - the first one |
90 | As you can see, some logging levels have multiple aliases - the first one |
87 | is the "official" name, the second one the "syslog" name (if it differs) |
91 | is the "official" name, the second one the "syslog" name (if it differs) |
88 | and the third one the "perl" name, suggesting that you log C<die> messages |
92 | and the third one the "perl" name, suggesting (only!) that you log C<die> |
89 | at C<error> priority. |
93 | messages at C<error> priority. |
90 | |
94 | |
91 | You can normally only log a single message at highest priority level |
95 | You can normally only log a single message at highest priority level |
92 | (C<1>, C<fatal>), because logging a fatal message will also quit the |
96 | (C<1>, C<fatal>), because logging a fatal message will also quit the |
93 | program - so use it sparingly :) |
97 | program - so use it sparingly :) |
94 | |
98 | |
… | |
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110 | |
114 | |
111 | use Carp (); |
115 | use Carp (); |
112 | use POSIX (); |
116 | use POSIX (); |
113 | |
117 | |
114 | use AnyEvent (); BEGIN { AnyEvent::common_sense } |
118 | use AnyEvent (); BEGIN { AnyEvent::common_sense } |
115 | use AnyEvent::Util (); |
119 | #use AnyEvent::Util (); need to load this in a delayed fashion, as it uses AE::log |
116 | |
120 | |
117 | our $VERSION = $AnyEvent::VERSION; |
121 | our $VERSION = $AnyEvent::VERSION; |
118 | |
122 | |
119 | our ($COLLECT, $FILTER, $LOG); |
123 | our ($COLLECT, $FILTER, $LOG); |
120 | |
124 | |
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150 | =item AnyEvent::Log::log $level, $msg[, @args] |
154 | =item AnyEvent::Log::log $level, $msg[, @args] |
151 | |
155 | |
152 | Requests logging of the given C<$msg> with the given log level, and |
156 | Requests logging of the given C<$msg> with the given log level, and |
153 | returns true if the message was logged I<somewhere>. |
157 | returns true if the message was logged I<somewhere>. |
154 | |
158 | |
155 | For C<fatal> log levels, the program will abort. |
159 | For loglevel C<fatal>, the program will abort. |
156 | |
160 | |
157 | If only a C<$msg> is given, it is logged as-is. With extra C<@args>, the |
161 | If only a C<$msg> is given, it is logged as-is. With extra C<@args>, the |
158 | C<$msg> is interpreted as an sprintf format string. |
162 | C<$msg> is interpreted as an sprintf format string. |
159 | |
163 | |
160 | The C<$msg> should not end with C<\n>, but may if that is convenient for |
164 | The C<$msg> should not end with C<\n>, but may if that is convenient for |
… | |
… | |
205 | info => 7, |
209 | info => 7, |
206 | debug => 8, |
210 | debug => 8, |
207 | trace => 9, |
211 | trace => 9, |
208 | ); |
212 | ); |
209 | |
213 | |
210 | sub now () { time } |
214 | our $TIME_EXACT; |
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215 | |
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216 | sub exact_time($) { |
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217 | $TIME_EXACT = shift; |
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|
218 | *_ts = $AnyEvent::MODEL |
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|
219 | ? $TIME_EXACT ? \&AE::now : \&AE::time |
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|
220 | : sub () { $TIME_EXACT ? do { require Time::HiRes; Time::HiRes::time () } : time }; |
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|
221 | } |
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|
222 | |
|
|
223 | BEGIN { |
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|
224 | exact_time 0; |
|
|
225 | } |
211 | |
226 | |
212 | AnyEvent::post_detect { |
227 | AnyEvent::post_detect { |
213 | *now = \&AE::now; |
228 | exact_time $TIME_EXACT; |
214 | }; |
229 | }; |
215 | |
230 | |
216 | our @LEVEL2STR = qw(0 fatal alert crit error warn note info debug trace); |
231 | our @LEVEL2STR = qw(0 fatal alert crit error warn note info debug trace); |
217 | |
232 | |
218 | # time, ctx, level, msg |
233 | # time, ctx, level, msg |
… | |
… | |
251 | # now get raw message, unless we have it already |
266 | # now get raw message, unless we have it already |
252 | unless ($now) { |
267 | unless ($now) { |
253 | $format = $format->() if ref $format; |
268 | $format = $format->() if ref $format; |
254 | $format = sprintf $format, @args if @args; |
269 | $format = sprintf $format, @args if @args; |
255 | $format =~ s/\n$//; |
270 | $format =~ s/\n$//; |
256 | $now = AE::now; |
271 | $now = _ts; |
257 | }; |
272 | }; |
258 | |
273 | |
259 | # format msg |
274 | # format msg |
260 | my $str = $ctx->[4] |
275 | my $str = $ctx->[4] |
261 | ? $ctx->[4]($now, $_[0], $level, $format) |
276 | ? $ctx->[4]($now, $_[0], $level, $format) |
… | |
… | |
356 | |
371 | |
357 | $LOGGER{$logger+0} = $logger; |
372 | $LOGGER{$logger+0} = $logger; |
358 | |
373 | |
359 | _reassess $logger+0; |
374 | _reassess $logger+0; |
360 | |
375 | |
|
|
376 | require AnyEvent::Util; |
361 | my $guard = AnyEvent::Util::guard { |
377 | my $guard = AnyEvent::Util::guard (sub { |
362 | # "clean up" |
378 | # "clean up" |
363 | delete $LOGGER{$logger+0}; |
379 | delete $LOGGER{$logger+0}; |
364 | }; |
380 | }); |
365 | |
381 | |
366 | sub { |
382 | sub { |
367 | $guard if 0; # keep guard alive, but don't cause runtime overhead |
383 | $guard if 0; # keep guard alive, but don't cause runtime overhead |
368 | |
384 | |
369 | _log $ctx, $level, @_ |
385 | _log $ctx, $level, @_ |
… | |
… | |
374 | sub logger($;$) { |
390 | sub logger($;$) { |
375 | _logger |
391 | _logger |
376 | $CTX{ (caller)[0] } ||= _pkg_ctx +(caller)[0], |
392 | $CTX{ (caller)[0] } ||= _pkg_ctx +(caller)[0], |
377 | @_ |
393 | @_ |
378 | } |
394 | } |
|
|
395 | |
|
|
396 | =item AnyEvent::Log::exact_time $on |
|
|
397 | |
|
|
398 | By default, C<AnyEvent::Log> will use C<AE::now>, i.e. the cached |
|
|
399 | eventloop time, for the log timestamps. After calling this function with a |
|
|
400 | true value it will instead resort to C<AE::time>, i.e. fetch the current |
|
|
401 | time on each log message. This only makes a difference for event loops |
|
|
402 | that actually cache the time (such as L<EV> or L<AnyEvent::Loop>). |
|
|
403 | |
|
|
404 | This setting can be changed at any time by calling this function. |
|
|
405 | |
|
|
406 | Since C<AnyEvent::Log> has to work even before the L<AnyEvent> has been |
|
|
407 | initialised, this switch will also decide whether to use C<CORE::time> or |
|
|
408 | C<Time::HiRes::time> when logging a message before L<AnyEvent> becomes |
|
|
409 | available. |
379 | |
410 | |
380 | =back |
411 | =back |
381 | |
412 | |
382 | =head1 LOGGING CONTEXTS |
413 | =head1 LOGGING CONTEXTS |
383 | |
414 | |
… | |
… | |
515 | } |
546 | } |
516 | |
547 | |
517 | @$_ = ($_->[0], (1 << 10) - 1 - 1) |
548 | @$_ = ($_->[0], (1 << 10) - 1 - 1) |
518 | for $LOG, $FILTER, $COLLECT; |
549 | for $LOG, $FILTER, $COLLECT; |
519 | |
550 | |
520 | $LOG->slaves; |
551 | #$LOG->slaves; |
521 | $LOG->title ('$AnyEvent::Log::LOG'); |
552 | $LOG->title ('$AnyEvent::Log::LOG'); |
522 | $LOG->log_cb (sub { |
553 | $LOG->log_to_warn; |
523 | warn shift; |
|
|
524 | 0 |
|
|
525 | }); |
|
|
526 | |
554 | |
527 | $FILTER->slaves ($LOG); |
555 | $FILTER->slaves ($LOG); |
528 | $FILTER->title ('$AnyEvent::Log::FILTER'); |
556 | $FILTER->title ('$AnyEvent::Log::FILTER'); |
529 | $FILTER->level ($AnyEvent::VERBOSE); |
557 | $FILTER->level ($AnyEvent::VERBOSE); |
530 | |
558 | |
… | |
… | |
791 | logging context, the (numeric) logging level and the raw message string |
819 | logging context, the (numeric) logging level and the raw message string |
792 | and needs to return a formatted log message. In most cases this will be a |
820 | and needs to return a formatted log message. In most cases this will be a |
793 | string, but it could just as well be an array reference that just stores |
821 | string, but it could just as well be an array reference that just stores |
794 | the values. |
822 | the values. |
795 | |
823 | |
796 | If, for some reaosn, you want to use C<caller> to find out more baout the |
824 | If, for some reason, you want to use C<caller> to find out more baout the |
797 | logger then you should walk up the call stack until you are no longer |
825 | logger then you should walk up the call stack until you are no longer |
798 | inside the C<AnyEvent::Log> package. |
826 | inside the C<AnyEvent::Log> package. |
799 | |
827 | |
800 | Example: format just the raw message, with numeric log level in angle |
828 | Example: format just the raw message, with numeric log level in angle |
801 | brackets. |
829 | brackets. |
… | |
… | |
820 | "$msg->[3]"; |
848 | "$msg->[3]"; |
821 | |
849 | |
822 | 0 |
850 | 0 |
823 | }); |
851 | }); |
824 | |
852 | |
|
|
853 | =item $ctx->log_to_warn |
|
|
854 | |
|
|
855 | Sets the C<log_cb> to simply use C<CORE::warn> to report any messages |
|
|
856 | (usually this logs to STDERR). |
|
|
857 | |
825 | =item $ctx->log_to_file ($path) |
858 | =item $ctx->log_to_file ($path) |
826 | |
859 | |
827 | Sets the C<log_cb> to log to a file (by appending), unbuffered. |
860 | Sets the C<log_cb> to log to a file (by appending), unbuffered. |
828 | |
861 | |
829 | =item $ctx->log_to_path ($path) |
862 | =item $ctx->log_to_path ($path) |
830 | |
863 | |
831 | Same as C<< ->log_to_file >>, but opens the file for each message. This |
864 | Same as C<< ->log_to_file >>, but opens the file for each message. This |
832 | is much slower, but allows you to change/move/rename/delete the file at |
865 | is much slower, but allows you to change/move/rename/delete the file at |
833 | basically any time. |
866 | basically any time. |
834 | |
867 | |
|
|
868 | Needless(?) to say, if you do not want to be bitten by some evil person |
|
|
869 | calling C<chdir>, the path should be absolute. Doesn't help with |
|
|
870 | C<chroot>, but hey... |
|
|
871 | |
835 | =item $ctx->log_to_syslog ([$log_flags]) |
872 | =item $ctx->log_to_syslog ([$facility]) |
836 | |
873 | |
837 | Logs all messages via L<Sys::Syslog>, mapping C<trace> to C<debug> and all |
874 | Logs all messages via L<Sys::Syslog>, mapping C<trace> to C<debug> and |
838 | the others in the obvious way. If specified, then the C<$log_flags> are |
875 | all the others in the obvious way. If specified, then the C<$facility> is |
839 | simply or'ed onto the priority argument and can contain any C<LOG_xxx> |
876 | used as the facility (C<user>, C<auth>, C<local0> and so on). The default |
840 | flags valid for Sys::Syslog::syslog, except for the priority levels. |
877 | facility is C<user>. |
841 | |
878 | |
842 | Note that this function also sets a C<fmt_cb> - the logging part requires |
879 | Note that this function also sets a C<fmt_cb> - the logging part requires |
843 | an array reference with [$level, $str] as input. |
880 | an array reference with [$level, $str] as input. |
844 | |
881 | |
845 | =cut |
882 | =cut |
… | |
… | |
852 | |
889 | |
853 | sub fmt_cb { |
890 | sub fmt_cb { |
854 | my ($ctx, $cb) = @_; |
891 | my ($ctx, $cb) = @_; |
855 | |
892 | |
856 | $ctx->[4] = $cb; |
893 | $ctx->[4] = $cb; |
|
|
894 | } |
|
|
895 | |
|
|
896 | sub log_to_warn { |
|
|
897 | my ($ctx, $path) = @_; |
|
|
898 | |
|
|
899 | $ctx->log_cb (sub { |
|
|
900 | warn shift; |
|
|
901 | 0 |
|
|
902 | }); |
857 | } |
903 | } |
858 | |
904 | |
859 | sub log_to_file { |
905 | sub log_to_file { |
860 | my ($ctx, $path) = @_; |
906 | my ($ctx, $path) = @_; |
861 | |
907 | |
… | |
… | |
866 | syswrite $fh, shift; |
912 | syswrite $fh, shift; |
867 | 0 |
913 | 0 |
868 | }); |
914 | }); |
869 | } |
915 | } |
870 | |
916 | |
871 | sub log_to_file { |
917 | sub log_to_path { |
872 | my ($ctx, $path) = @_; |
918 | my ($ctx, $path) = @_; |
873 | |
919 | |
874 | $ctx->log_cb (sub { |
920 | $ctx->log_cb (sub { |
875 | open my $fh, ">>", $path |
921 | open my $fh, ">>", $path |
876 | or die "$path: $!"; |
922 | or die "$path: $!"; |
… | |
… | |
879 | 0 |
925 | 0 |
880 | }); |
926 | }); |
881 | } |
927 | } |
882 | |
928 | |
883 | sub log_to_syslog { |
929 | sub log_to_syslog { |
884 | my ($ctx, $flags) = @_; |
930 | my ($ctx, $facility) = @_; |
885 | |
931 | |
886 | require Sys::Syslog; |
932 | require Sys::Syslog; |
887 | |
933 | |
888 | $ctx->fmt_cb (sub { |
934 | $ctx->fmt_cb (sub { |
889 | my $str = $_[3]; |
935 | my $str = $_[3]; |
890 | $str =~ s/\n(?=.)/\n+ /g; |
936 | $str =~ s/\n(?=.)/\n+ /g; |
891 | |
937 | |
892 | [$_[2], "($_[1][0]) $str"] |
938 | [$_[2], "($_[1][0]) $str"] |
893 | }); |
939 | }); |
894 | |
940 | |
|
|
941 | $facility ||= "user"; |
|
|
942 | |
895 | $ctx->log_cb (sub { |
943 | $ctx->log_cb (sub { |
896 | my $lvl = $_[0][0] < 9 ? $_[0][0] : 8; |
944 | my $lvl = $_[0][0] < 9 ? $_[0][0] : 8; |
897 | |
945 | |
898 | Sys::Syslog::syslog ($flags | ($lvl - 1), $_) |
946 | Sys::Syslog::syslog ("$facility|" . ($lvl - 1), $_) |
899 | for split /\n/, $_[0][1]; |
947 | for split /\n/, $_[0][1]; |
900 | |
948 | |
901 | 0 |
949 | 0 |
902 | }); |
950 | }); |
903 | } |
951 | } |
… | |
… | |
923 | =cut |
971 | =cut |
924 | |
972 | |
925 | *log = \&AnyEvent::Log::_log; |
973 | *log = \&AnyEvent::Log::_log; |
926 | *logger = \&AnyEvent::Log::_logger; |
974 | *logger = \&AnyEvent::Log::_logger; |
927 | |
975 | |
|
|
976 | =back |
|
|
977 | |
|
|
978 | =cut |
|
|
979 | |
|
|
980 | package AnyEvent::Log; |
|
|
981 | |
|
|
982 | =head1 CONFIGURATION VIA $ENV{PERL_ANYEVENT_LOG} |
|
|
983 | |
|
|
984 | Logging can also be configured by setting the environment variable |
|
|
985 | C<PERL_ANYEVENT_LOG> (or C<AE_LOG>). |
|
|
986 | |
|
|
987 | The value consists of one or more logging context specifications separated |
|
|
988 | by C<:> or whitespace. Each logging specification in turn starts with a |
|
|
989 | context name, followed by C<=>, followed by zero or more comma-separated |
|
|
990 | configuration directives, here are some examples: |
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|
991 | |
|
|
992 | # set default logging level |
|
|
993 | filter=warn |
|
|
994 | |
|
|
995 | # log to file instead of to stderr |
|
|
996 | log=file=/tmp/mylog |
|
|
997 | |
|
|
998 | # log to file in addition to stderr |
|
|
999 | log=+%file:%file=file=/tmp/mylog |
|
|
1000 | |
|
|
1001 | # enable debug log messages, log warnings and above to syslog |
|
|
1002 | filter=debug:log=+%warnings:%warnings=warn,syslog=LOG_LOCAL0 |
|
|
1003 | |
|
|
1004 | # log trace messages (only) from AnyEvent::Debug to file |
|
|
1005 | AnyEvent::Debug=+%trace:%trace=only,trace,file=/tmp/tracelog |
|
|
1006 | |
|
|
1007 | A context name in the log specification can be any of the following: |
|
|
1008 | |
|
|
1009 | =over 4 |
|
|
1010 | |
|
|
1011 | =item C<collect>, C<filter>, C<log> |
|
|
1012 | |
|
|
1013 | Correspond to the three predefined C<$AnyEvent::Log::COLLECT>, |
|
|
1014 | C<AnyEvent::Log::FILTER> and C<$AnyEvent::Log::LOG> contexts. |
|
|
1015 | |
|
|
1016 | =item C<%name> |
|
|
1017 | |
|
|
1018 | Context names starting with a C<%> are anonymous contexts created when the |
|
|
1019 | name is first mentioned. The difference to package contexts is that by |
|
|
1020 | default they have no attached slaves. |
|
|
1021 | |
|
|
1022 | =item a perl package name |
|
|
1023 | |
|
|
1024 | Any other string references the logging context associated with the given |
|
|
1025 | Perl C<package>. In the unlikely case where you want to specify a package |
|
|
1026 | context that matches on of the other context name forms, you can add a |
|
|
1027 | C<::> to the package name to force interpretation as a package. |
|
|
1028 | |
|
|
1029 | =back |
|
|
1030 | |
|
|
1031 | The configuration specifications can be any number of the following: |
|
|
1032 | |
|
|
1033 | =over 4 |
|
|
1034 | |
|
|
1035 | =item C<stderr> |
|
|
1036 | |
|
|
1037 | Configures the context to use Perl's C<warn> function (which typically |
|
|
1038 | logs to C<STDERR>). Works like C<log_to_warn>. |
|
|
1039 | |
|
|
1040 | =item C<file=>I<path> |
|
|
1041 | |
|
|
1042 | Configures the context to log to a file with the given path. Works like |
|
|
1043 | C<log_to_file>. |
|
|
1044 | |
|
|
1045 | =item C<path=>I<path> |
|
|
1046 | |
|
|
1047 | Configures the context to log to a file with the given path. Works like |
|
|
1048 | C<log_to_path>. |
|
|
1049 | |
|
|
1050 | =item C<syslog> or C<syslog=>I<expr> |
|
|
1051 | |
|
|
1052 | Configures the context to log to syslog. If I<expr> is given, then it is |
|
|
1053 | evaluated in the L<Sys::Syslog> package, so you could use: |
|
|
1054 | |
|
|
1055 | log=syslog=LOG_LOCAL0 |
|
|
1056 | |
|
|
1057 | =item C<nolog> |
|
|
1058 | |
|
|
1059 | Configures the context to not log anything by itself, which is the |
|
|
1060 | default. Same as C<< $ctx->log_cb (undef) >>. |
|
|
1061 | |
|
|
1062 | =item C<0> or C<off> |
|
|
1063 | |
|
|
1064 | Sets the logging level of the context ot C<0>, i.e. all messages will be |
|
|
1065 | filtered out. |
|
|
1066 | |
|
|
1067 | =item C<all> |
|
|
1068 | |
|
|
1069 | Enables all logging levels, i.e. filtering will effectively be switched |
|
|
1070 | off (the default). |
|
|
1071 | |
|
|
1072 | =item C<only> |
|
|
1073 | |
|
|
1074 | Disables all logging levels, and changes the interpretation of following |
|
|
1075 | level specifications to enable the specified level only. |
|
|
1076 | |
|
|
1077 | Example: only enable debug messages for a context. |
|
|
1078 | |
|
|
1079 | context=only,debug |
|
|
1080 | |
|
|
1081 | =item C<except> |
|
|
1082 | |
|
|
1083 | Enables all logging levels, and changes the interpretation of following |
|
|
1084 | level specifications to disable that level. Rarely used. |
|
|
1085 | |
|
|
1086 | Example: enable all logging levels except fatal and trace (this is rather |
|
|
1087 | nonsensical). |
|
|
1088 | |
|
|
1089 | filter=exept,fatal,trace |
|
|
1090 | |
|
|
1091 | =item C<level> |
|
|
1092 | |
|
|
1093 | Enables all logging levels, and changes the interpretation of following |
|
|
1094 | level specifications to be "that level or any higher priority |
|
|
1095 | message". This is the default. |
|
|
1096 | |
|
|
1097 | Example: log anything at or above warn level. |
|
|
1098 | |
|
|
1099 | filter=warn |
|
|
1100 | |
|
|
1101 | # or, more verbose |
|
|
1102 | filter=only,level,warn |
|
|
1103 | |
|
|
1104 | =item C<1>..C<9> or a logging level name (C<error>, C<debug> etc.) |
|
|
1105 | |
|
|
1106 | A numeric loglevel or the name of a loglevel will be interpreted according |
|
|
1107 | to the most recent C<only>, C<except> or C<level> directive. By default, |
|
|
1108 | specifying a logging level enables that and any higher priority messages. |
|
|
1109 | |
|
|
1110 | =item C<+>I<context> |
|
|
1111 | |
|
|
1112 | Attaches the named context as slave to the context. |
|
|
1113 | |
|
|
1114 | =item C<+> |
|
|
1115 | |
|
|
1116 | A line C<+> detaches all contexts, i.e. clears the slave list from the |
|
|
1117 | context. Anonymous (C<%name>) contexts have no attached slaves by default, |
|
|
1118 | but package contexts have the parent context as slave by default. |
|
|
1119 | |
|
|
1120 | Example: log messages from My::Module to a file, do not send them to the |
|
|
1121 | default log collector. |
|
|
1122 | |
|
|
1123 | My::Module=+,file=/tmp/mymodulelog |
|
|
1124 | |
|
|
1125 | =back |
|
|
1126 | |
|
|
1127 | Any character can be escaped by prefixing it with a C<\> (backslash), as |
|
|
1128 | usual, so to log to a file containing a comma, colon, backslash and some |
|
|
1129 | spaces in the filename, you would do this: |
|
|
1130 | |
|
|
1131 | PERL_ANYEVENT_LOG='log=file=/some\ \:file\ with\,\ \\-escapes' |
|
|
1132 | |
|
|
1133 | Since whitespace (which includes newlines) is allowed, it is fine to |
|
|
1134 | specify multiple lines in C<PERL_ANYEVENT_LOG>, e.g.: |
|
|
1135 | |
|
|
1136 | PERL_ANYEVENT_LOG=" |
|
|
1137 | filter=warn |
|
|
1138 | AnyEvent::Debug=+%trace |
|
|
1139 | %trace=only,trace,+log |
|
|
1140 | " myprog |
|
|
1141 | |
|
|
1142 | Also, in the unlikely case when you want to concatenate specifications, |
|
|
1143 | use whitespace as separator, as C<::> will be interpreted as part of a |
|
|
1144 | module name, an empty spec with two separators: |
|
|
1145 | |
|
|
1146 | PERL_ANYEVENT_LOG="$PERL_ANYEVENT_LOG MyMod=debug" |
|
|
1147 | |
|
|
1148 | =cut |
|
|
1149 | |
|
|
1150 | for (my $spec = $ENV{PERL_ANYEVENT_LOG}) { |
|
|
1151 | my %anon; |
|
|
1152 | |
|
|
1153 | my $pkg = sub { |
|
|
1154 | $_[0] eq "log" ? $LOG |
|
|
1155 | : $_[0] eq "filter" ? $FILTER |
|
|
1156 | : $_[0] eq "collect" ? $COLLECT |
|
|
1157 | : $_[0] =~ /^%(.+)$/ ? ($anon{$1} ||= ctx undef) |
|
|
1158 | : $_[0] =~ /^(.*?)(?:::)?$/ ? ctx "$1" # egad :/ |
|
|
1159 | : die # never reached? |
|
|
1160 | }; |
|
|
1161 | |
|
|
1162 | /\G[[:space:]]+/gc; # skip initial whitespace |
|
|
1163 | |
|
|
1164 | while (/\G((?:[^:=[:space:]]+|::|\\.)+)=/gc) { |
|
|
1165 | my $ctx = $pkg->($1); |
|
|
1166 | my $level = "level"; |
|
|
1167 | |
|
|
1168 | while (/\G((?:[^,:[:space:]]+|::|\\.)+)/gc) { |
|
|
1169 | for ("$1") { |
|
|
1170 | if ($_ eq "stderr" ) { $ctx->log_to_warn; |
|
|
1171 | } elsif (/^file=(.+)/ ) { $ctx->log_to_file ("$1"); |
|
|
1172 | } elsif (/^path=(.+)/ ) { $ctx->log_to_path ("$1"); |
|
|
1173 | } elsif (/syslog(?:=(.*))?/ ) { require Sys::Syslog; $ctx->log_to_syslog ($1); |
|
|
1174 | } elsif ($_ eq "nolog" ) { $ctx->log_cb (undef); |
|
|
1175 | } elsif (/^\+(.+)$/ ) { $ctx->attach ($pkg->("$1")); |
|
|
1176 | } elsif ($_ eq "+" ) { $ctx->slaves; |
|
|
1177 | } elsif ($_ eq "off" or $_ eq "0") { $ctx->level (0); |
|
|
1178 | } elsif ($_ eq "all" ) { $ctx->level ("all"); |
|
|
1179 | } elsif ($_ eq "level" ) { $ctx->level ("all"); $level = "level"; |
|
|
1180 | } elsif ($_ eq "only" ) { $ctx->level ("off"); $level = "enable"; |
|
|
1181 | } elsif ($_ eq "except" ) { $ctx->level ("all"); $level = "disable"; |
|
|
1182 | } elsif (/^\d$/ ) { $ctx->$level ($_); |
|
|
1183 | } elsif (exists $STR2LEVEL{$_} ) { $ctx->$level ($_); |
|
|
1184 | } else { die "PERL_ANYEVENT_LOG ($spec): parse error at '$_'\n"; |
|
|
1185 | } |
|
|
1186 | } |
|
|
1187 | |
|
|
1188 | /\G,/gc or last; |
|
|
1189 | } |
|
|
1190 | |
|
|
1191 | /\G[:[:space:]]+/gc or last; |
|
|
1192 | } |
|
|
1193 | |
|
|
1194 | /\G[[:space:]]+/gc; # skip trailing whitespace |
|
|
1195 | |
|
|
1196 | if (/\G(.+)/g) { |
|
|
1197 | die "PERL_ANYEVENT_LOG ($spec): parse error at '$1'\n"; |
|
|
1198 | } |
|
|
1199 | } |
|
|
1200 | |
928 | 1; |
1201 | 1; |
929 | |
1202 | |
930 | =back |
|
|
931 | |
|
|
932 | =head1 EXAMPLES |
1203 | =head1 EXAMPLES |
933 | |
1204 | |
934 | This section shows some common configurations. |
1205 | This section shows some common configurations, both as code, and as |
|
|
1206 | C<PERL_ANYEVENT_LOG> string. |
935 | |
1207 | |
936 | =over 4 |
1208 | =over 4 |
937 | |
1209 | |
938 | =item Setting the global logging level. |
1210 | =item Setting the global logging level. |
939 | |
1211 | |
940 | Either put PERL_ANYEVENT_VERBOSE=<number> into your environment before |
1212 | Either put C<PERL_ANYEVENT_VERBOSE=><number> into your environment before |
941 | running your program, or modify the log level of the root context: |
1213 | running your program, use C<PERL_ANYEVENT_LOG> or modify the log level of |
|
|
1214 | the root context at runtime: |
942 | |
1215 | |
943 | PERL_ANYEVENT_VERBOSE=5 ./myprog |
1216 | PERL_ANYEVENT_VERBOSE=5 ./myprog |
944 | |
1217 | |
|
|
1218 | PERL_ANYEVENT_LOG=log=warn |
|
|
1219 | |
945 | $AnyEvent::Log::FILTER->level ("warn"); |
1220 | $AnyEvent::Log::FILTER->level ("warn"); |
946 | |
1221 | |
947 | =item Append all messages to a file instead of sending them to STDERR. |
1222 | =item Append all messages to a file instead of sending them to STDERR. |
948 | |
1223 | |
949 | This is affected by the global logging level. |
1224 | This is affected by the global logging level. |
950 | |
1225 | |
951 | $AnyEvent::Log::LOG->log_to_file ($path); (sub { |
1226 | $AnyEvent::Log::LOG->log_to_file ($path); |
|
|
1227 | |
|
|
1228 | PERL_ANYEVENT_LOG=log=file=/some/path |
952 | |
1229 | |
953 | =item Write all messages with priority C<error> and higher to a file. |
1230 | =item Write all messages with priority C<error> and higher to a file. |
954 | |
1231 | |
955 | This writes them only when the global logging level allows it, because |
1232 | This writes them only when the global logging level allows it, because |
956 | it is attached to the default context which is invoked I<after> global |
1233 | it is attached to the default context which is invoked I<after> global |
957 | filtering. |
1234 | filtering. |
958 | |
1235 | |
959 | $AnyEvent::Log::FILTER->attach |
1236 | $AnyEvent::Log::FILTER->attach |
960 | new AnyEvent::Log::Ctx log_to_file => $path); |
1237 | new AnyEvent::Log::Ctx log_to_file => $path); |
961 | |
1238 | |
|
|
1239 | PERL_ANYEVENT_LOG=filter=+%filelogger:%filelogger=file=/some/path |
|
|
1240 | |
962 | This writes them regardless of the global logging level, because it is |
1241 | This writes them regardless of the global logging level, because it is |
963 | attached to the toplevel context, which receives all messages I<before> |
1242 | attached to the toplevel context, which receives all messages I<before> |
964 | the global filtering. |
1243 | the global filtering. |
965 | |
1244 | |
966 | $AnyEvent::Log::COLLECT->attach ( |
1245 | $AnyEvent::Log::COLLECT->attach ( |
967 | new AnyEvent::Log::Ctx log_to_file => $path); |
1246 | new AnyEvent::Log::Ctx log_to_file => $path); |
968 | |
1247 | |
|
|
1248 | PERL_ANYEVENT_LOG=%filelogger=file=/some/path:collect=+%filelogger |
|
|
1249 | |
969 | In both cases, messages are still written to STDERR. |
1250 | In both cases, messages are still written to STDERR. |
970 | |
1251 | |
971 | =item Write trace messages (only) from L<AnyEvent::Debug> to the default logging target(s). |
1252 | =item Write trace messages (only) from L<AnyEvent::Debug> to the default logging target(s). |
972 | |
1253 | |
973 | Attach the C<$AnyEvent::Log::LOG> context to the C<AnyEvent::Debug> |
1254 | Attach the C<$AnyEvent::Log::LOG> context to the C<AnyEvent::Debug> |
974 | context - this simply circumvents the global filtering for trace messages. |
1255 | context - this simply circumvents the global filtering for trace messages. |
975 | |
1256 | |
976 | my $debug = AnyEvent::Debug->AnyEvent::Log::ctx; |
1257 | my $debug = AnyEvent::Debug->AnyEvent::Log::ctx; |
977 | $debug->attach ($AnyEvent::Log::LOG); |
1258 | $debug->attach ($AnyEvent::Log::LOG); |
|
|
1259 | |
|
|
1260 | PERL_ANYEVENT_LOG=AnyEvent::Debug=+log |
978 | |
1261 | |
979 | This of course works for any package, not just L<AnyEvent::Debug>, but |
1262 | This of course works for any package, not just L<AnyEvent::Debug>, but |
980 | assumes the log level for AnyEvent::Debug hasn't been changed from the |
1263 | assumes the log level for AnyEvent::Debug hasn't been changed from the |
981 | default. |
1264 | default. |
982 | |
1265 | |
… | |
… | |
986 | |
1269 | |
987 | Marc Lehmann <schmorp@schmorp.de> |
1270 | Marc Lehmann <schmorp@schmorp.de> |
988 | http://home.schmorp.de/ |
1271 | http://home.schmorp.de/ |
989 | |
1272 | |
990 | =cut |
1273 | =cut |
|
|
1274 | |