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… | |
49 | will be logged, unless you set C<PERL_ANYEVENT_VERBOSE> to a higher number |
49 | will be logged, unless you set C<PERL_ANYEVENT_VERBOSE> to a higher number |
50 | before starting your program, or change the logging level at runtime with |
50 | before starting your program, or change the logging level at runtime with |
51 | something like: |
51 | something like: |
52 | |
52 | |
53 | use AnyEvent::Log; |
53 | use AnyEvent::Log; |
54 | AnyEvent::Log::FILTER->level ("info"); |
54 | $AnyEvent::Log::FILTER->level ("info"); |
55 | |
55 | |
56 | The design goal behind this module was to keep it simple (and small), |
56 | The design goal behind this module was to keep it simple (and small), |
57 | but make it powerful enough to be potentially useful for any module, and |
57 | but make it powerful enough to be potentially useful for any module, and |
58 | extensive enough for the most common tasks, such as logging to multiple |
58 | extensive enough for the most common tasks, such as logging to multiple |
59 | targets, or being able to log into a database. |
59 | targets, or being able to log into a database. |
60 | |
60 | |
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61 | The module is also usable before AnyEvent itself is initialised, in which |
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|
62 | case some of the functionality might be reduced. |
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63 | |
61 | The amount of documentation might indicate otherwise, but the module is |
64 | The amount of documentation might indicate otherwise, but the runtime part |
62 | still just below 300 lines of code. |
65 | of the module is still just below 300 lines of code. |
63 | |
66 | |
64 | =head1 LOGGING LEVELS |
67 | =head1 LOGGING LEVELS |
65 | |
68 | |
66 | Logging levels in this module range from C<1> (highest priority) to C<9> |
69 | Logging levels in this module range from C<1> (highest priority) to C<9> |
67 | (lowest priority). Note that the lowest numerical value is the highest |
70 | (lowest priority). Note that the lowest numerical value is the highest |
… | |
… | |
108 | |
111 | |
109 | use Carp (); |
112 | use Carp (); |
110 | use POSIX (); |
113 | use POSIX (); |
111 | |
114 | |
112 | use AnyEvent (); BEGIN { AnyEvent::common_sense } |
115 | use AnyEvent (); BEGIN { AnyEvent::common_sense } |
113 | use AnyEvent::Util (); |
116 | #use AnyEvent::Util (); need to load this in a delayed fashion, as it uses AE::log |
114 | |
117 | |
115 | our $VERSION = $AnyEvent::VERSION; |
118 | our $VERSION = $AnyEvent::VERSION; |
116 | |
119 | |
117 | our ($COLLECT, $FILTER, $LOG); |
120 | our ($COLLECT, $FILTER, $LOG); |
118 | |
121 | |
… | |
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203 | info => 7, |
206 | info => 7, |
204 | debug => 8, |
207 | debug => 8, |
205 | trace => 9, |
208 | trace => 9, |
206 | ); |
209 | ); |
207 | |
210 | |
208 | sub now () { time } |
211 | our $TIME_EXACT; |
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212 | |
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213 | sub exact_time($) { |
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214 | $TIME_EXACT = shift; |
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215 | *_ts = $AnyEvent::MODEL |
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216 | ? $TIME_EXACT ? \&AE::now : \&AE::time |
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217 | : sub () { $TIME_EXACT ? do { require Time::HiRes; Time::HiRes::time () } : time }; |
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|
218 | } |
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|
219 | |
|
|
220 | BEGIN { |
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|
221 | exact_time 0; |
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|
222 | } |
209 | |
223 | |
210 | AnyEvent::post_detect { |
224 | AnyEvent::post_detect { |
211 | *now = \&AE::now; |
225 | exact_time $TIME_EXACT; |
212 | }; |
226 | }; |
213 | |
227 | |
214 | our @LEVEL2STR = qw(0 fatal alert crit error warn note info debug trace); |
228 | our @LEVEL2STR = qw(0 fatal alert crit error warn note info debug trace); |
215 | |
229 | |
216 | # time, ctx, level, msg |
230 | # time, ctx, level, msg |
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249 | # now get raw message, unless we have it already |
263 | # now get raw message, unless we have it already |
250 | unless ($now) { |
264 | unless ($now) { |
251 | $format = $format->() if ref $format; |
265 | $format = $format->() if ref $format; |
252 | $format = sprintf $format, @args if @args; |
266 | $format = sprintf $format, @args if @args; |
253 | $format =~ s/\n$//; |
267 | $format =~ s/\n$//; |
254 | $now = now; |
268 | $now = _ts; |
255 | }; |
269 | }; |
256 | |
270 | |
257 | # format msg |
271 | # format msg |
258 | my $str = $ctx->[4] |
272 | my $str = $ctx->[4] |
259 | ? $ctx->[4]($now, $_[0], $level, $format) |
273 | ? $ctx->[4]($now, $_[0], $level, $format) |
… | |
… | |
354 | |
368 | |
355 | $LOGGER{$logger+0} = $logger; |
369 | $LOGGER{$logger+0} = $logger; |
356 | |
370 | |
357 | _reassess $logger+0; |
371 | _reassess $logger+0; |
358 | |
372 | |
|
|
373 | require AnyEvent::Util; |
359 | my $guard = AnyEvent::Util::guard { |
374 | my $guard = AnyEvent::Util::guard (sub { |
360 | # "clean up" |
375 | # "clean up" |
361 | delete $LOGGER{$logger+0}; |
376 | delete $LOGGER{$logger+0}; |
362 | }; |
377 | }); |
363 | |
378 | |
364 | sub { |
379 | sub { |
365 | $guard if 0; # keep guard alive, but don't cause runtime overhead |
380 | $guard if 0; # keep guard alive, but don't cause runtime overhead |
366 | |
381 | |
367 | _log $ctx, $level, @_ |
382 | _log $ctx, $level, @_ |
… | |
… | |
372 | sub logger($;$) { |
387 | sub logger($;$) { |
373 | _logger |
388 | _logger |
374 | $CTX{ (caller)[0] } ||= _pkg_ctx +(caller)[0], |
389 | $CTX{ (caller)[0] } ||= _pkg_ctx +(caller)[0], |
375 | @_ |
390 | @_ |
376 | } |
391 | } |
|
|
392 | |
|
|
393 | =item AnyEvent::Log::exact_time $on |
|
|
394 | |
|
|
395 | By default, C<AnyEvent::Log> will use C<AE::now>, i.e. the cached |
|
|
396 | eventloop time, for the log timestamps. After calling this function with a |
|
|
397 | true value it will instead resort to C<AE::time>, i.e. fetch the current |
|
|
398 | time on each log message. This only makes a difference for event loops |
|
|
399 | that actually cache the time (such as L<EV> or L<AnyEvent::Loop>). |
|
|
400 | |
|
|
401 | Since C<AnyEvent::Log> has to work even before the L<AnyEvent> has been |
|
|
402 | initialised, this switch will also decide whether to use C<CORE::time> or |
|
|
403 | C<Time::HiRes::time> when logging a message before L<AnyEvent> becomes |
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|
404 | available. |
377 | |
405 | |
378 | =back |
406 | =back |
379 | |
407 | |
380 | =head1 LOGGING CONTEXTS |
408 | =head1 LOGGING CONTEXTS |
381 | |
409 | |
… | |
… | |
513 | } |
541 | } |
514 | |
542 | |
515 | @$_ = ($_->[0], (1 << 10) - 1 - 1) |
543 | @$_ = ($_->[0], (1 << 10) - 1 - 1) |
516 | for $LOG, $FILTER, $COLLECT; |
544 | for $LOG, $FILTER, $COLLECT; |
517 | |
545 | |
518 | $LOG->slaves; |
546 | #$LOG->slaves; |
519 | $LOG->title ('$AnyEvent::Log::LOG'); |
547 | $LOG->title ('$AnyEvent::Log::LOG'); |
520 | $LOG->log_to_warn; |
548 | $LOG->log_to_warn; |
521 | |
549 | |
522 | $FILTER->slaves ($LOG); |
550 | $FILTER->slaves ($LOG); |
523 | $FILTER->title ('$AnyEvent::Log::FILTER'); |
551 | $FILTER->title ('$AnyEvent::Log::FILTER'); |
… | |
… | |
1012 | Configures the context to log to a file with the given path. Works like |
1040 | Configures the context to log to a file with the given path. Works like |
1013 | C<log_to_path>. |
1041 | C<log_to_path>. |
1014 | |
1042 | |
1015 | =item C<syslog> or C<syslog=>I<expr> |
1043 | =item C<syslog> or C<syslog=>I<expr> |
1016 | |
1044 | |
1017 | Configured the context to log to syslog. If I<expr> is given, then it is |
1045 | Configures the context to log to syslog. If I<expr> is given, then it is |
1018 | evaluated in the L<Sys::Syslog> package, so you could use: |
1046 | evaluated in the L<Sys::Syslog> package, so you could use: |
1019 | |
1047 | |
1020 | log=syslog=LOG_LOCAL0 |
1048 | log=syslog=LOG_LOCAL0 |
1021 | |
1049 | |
1022 | =item C<nolog> |
1050 | =item C<nolog> |
… | |
… | |
1064 | filter=warn |
1092 | filter=warn |
1065 | |
1093 | |
1066 | # or, more verbose |
1094 | # or, more verbose |
1067 | filter=only,level,warn |
1095 | filter=only,level,warn |
1068 | |
1096 | |
1069 | =item C<1>..C<9>, a logging level name (C<error>, C<debug> etc.) |
1097 | =item C<1>..C<9> or a logging level name (C<error>, C<debug> etc.) |
1070 | |
1098 | |
1071 | A numeric loglevel or the name of a loglevel will be interpreted according |
1099 | A numeric loglevel or the name of a loglevel will be interpreted according |
1072 | to the most recent C<only>, C<except> or C<level> directive. By default, |
1100 | to the most recent C<only>, C<except> or C<level> directive. By default, |
1073 | specifying a logging level enables that and any higher priority messages. |
1101 | specifying a logging level enables that and any higher priority messages. |
1074 | |
1102 | |
1075 | =item C<+>I<context> |
1103 | =item C<+>I<context> |
1076 | |
1104 | |
1077 | Adds/attaches the named context as slave to the context. |
1105 | Attaches the named context as slave to the context. |
1078 | |
1106 | |
1079 | =item C<+> |
1107 | =item C<+> |
1080 | |
1108 | |
1081 | A line C<+> clears the slave list form the context. Anonymous (C<%name>) |
1109 | A line C<+> detaches all contexts, i.e. clears the slave list from the |
1082 | contexts have no slaves by default, but package contexts have the parent |
1110 | context. Anonymous (C<%name>) contexts have no attached slaves by default, |
1083 | context as slave by default. |
1111 | but package contexts have the parent context as slave by default. |
1084 | |
1112 | |
1085 | Example: log messages from My::Module to a file, do not send them to the |
1113 | Example: log messages from My::Module to a file, do not send them to the |
1086 | default log collector. |
1114 | default log collector. |
1087 | |
1115 | |
1088 | My::Module=+,file=/tmp/mymodulelog |
1116 | My::Module=+,file=/tmp/mymodulelog |
1089 | |
1117 | |
1090 | =back |
1118 | =back |
1091 | |
1119 | |
1092 | Any character can be escaped by prefixing it with a C<\> (backslash), as |
1120 | Any character can be escaped by prefixing it with a C<\> (backslash), as |
1093 | usual, so to log to a file containing a comma, colon, backslash and space in the |
1121 | usual, so to log to a file containing a comma, colon, backslash and some |
1094 | filename, you would do this: |
1122 | spaces in the filename, you would do this: |
1095 | |
1123 | |
1096 | PERL_ANYEVENT_LOG='log=file=/some\ \:file\ with\,\ \\-escapes' |
1124 | PERL_ANYEVENT_LOG='log=file=/some\ \:file\ with\,\ \\-escapes' |
1097 | |
1125 | |
1098 | Since whitespace (which includes newlines) is allowed, it is fine to |
1126 | Since whitespace (which includes newlines) is allowed, it is fine to |
1099 | specify multiple lines in C<PERL_ANYEVENT_LOG>, e.g.: |
1127 | specify multiple lines in C<PERL_ANYEVENT_LOG>, e.g.: |