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package EntityModel::Log; |
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# ABSTRACT: Logging class used by EntityModel |
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use strict; |
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use warnings FATAL => 'all', NONFATAL => 'redefine'; |
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use parent qw{Exporter}; |
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our $VERSION = '0.001'; |
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=head1 NAME |
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EntityModel::Log - simple logging support for L |
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=head1 SYNOPSIS |
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use EntityModel::Log ':all'; |
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logDebug("Test something"); |
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logInfo("Object [%s] found", $obj->name); |
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logError("Fatal problem"); |
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logInfo(sub { my $str = heavy_operation(); return 'Failed: %s', $str }); |
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=head1 DESCRIPTION |
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Yet another logging class. Provides a procedural and OO interface as usual. |
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=cut |
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# Need to be able to switch off logging in UNITCHECK stages, since that segfaults perl5.10.1 and possibly other versions |
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our $DISABLE = 0; |
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use Time::HiRes qw{time}; |
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use POSIX qw{strftime}; |
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use Exporter; |
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use List::Util qw{min max}; |
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use IO::Handle; |
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use Data::Dump (); |
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our %EXPORT_TAGS = ( 'all' => [qw/&logDebug &logInfo &logWarning &logError &logStack/] ); |
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our @EXPORT_OK = ( @{$EXPORT_TAGS{'all'}} ); |
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# Internal singleton instance |
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my $instance; |
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sub instance { my $class = shift; $instance ||= $class->new } |
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=head1 PROCEDURAL METHODS |
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46
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=cut |
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48
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my @LogType = ( |
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'Debug', |
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'Info', |
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'Warning', |
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'ERROR' |
53
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); |
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55
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0
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0
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sub logBase { __PACKAGE__->instance->raise(@_); } |
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57
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=head2 logDebug |
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59
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Raise a debug message, but only if the debug flag is set. Expect a high volume of these during normal operation |
60
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so live server has this switched off. |
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62
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=cut |
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64
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sub logDebug { unshift @_, 0; goto &logBase; } |
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65
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66
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=head2 logInfo |
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68
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Raise an informational message, which we'd like to track for stats |
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reasons - indicates normal operations rather than an error condition. |
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71
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=cut |
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sub logInfo { unshift @_, 1; goto &logBase; } |
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74
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75
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=head2 logWarning |
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77
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Raise a warning message, for things like 'article does not exist', expect a few of these in regular operations |
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but they aren't serious enough to be potential bugs or system problems. |
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80
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=cut |
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82
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sub logWarning { unshift @_, 2; goto &logBase; } |
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83
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84
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=head2 logError |
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86
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Raise an error - this is likely to be a genuine system problem. |
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88
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=cut |
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90
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sub logError { unshift @_, 3; goto &logBase; } |
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91
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92
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=head2 logStack |
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94
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Raise an error with stack - this is likely to be a genuine system problem. |
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96
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=cut |
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98
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sub logStack { |
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0
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my $txt = __PACKAGE__->instance->parseMessage(@_); |
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101
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$txt .= join("\n", map { |
102
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0
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sprintf("%s:%s %s", $_->{filename}, $_->{line}, $_->{subroutine}) |
103
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0
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} stackTrace()); |
104
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0
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logBase(3, $txt); |
105
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} |
106
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107
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=head2 stackTrace |
108
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109
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Get a stack trace, as an array of hashref entries, skipping the top two levels. |
110
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111
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=cut |
112
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113
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sub stackTrace { |
114
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0
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my $idx = 1; |
115
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0
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my @trace; |
116
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0
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my $basePath = ''; |
117
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0
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while($idx < 99 && (my @stack = caller($idx))) { |
118
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0
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my %info; |
119
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0
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foreach (qw/package filename line subroutine hasargs wantarray evaltext is_require hints bitmask hinthash/) { |
120
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0
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$info{$_} = (shift(@stack) // ''); |
121
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} |
122
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0
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if(0) { # could include source context using something like $info{filename} ~~ m{^$basePath/(.*)$} || $info{filename} ~~ m{^/perl-module-path/(.*)$}) { |
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my $file = $1; |
124
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if(-r $info{filename}) { |
125
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my $start = max(0, ($info{line} // 0) - 5); |
126
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$info{code} = ''; |
127
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open my $fh, '<', $info{filename} or die $!; |
128
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if($start) { |
129
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<$fh> for 0..$start; |
130
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} |
131
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$info{code} .= sprintf("%5d %s", $fh->input_line_number + 1, scalar(<$fh>)) for 0..10; |
132
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close $fh; |
133
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} |
134
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$info{filename} = $file; |
135
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} |
136
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0
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push @trace, \%info; |
137
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0
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++$idx; |
138
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} |
139
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0
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return @trace; |
140
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} |
141
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142
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sub levelFromString { |
143
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my $str = lc(shift); |
144
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my $idx = 0; |
145
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foreach (@LogType) { |
146
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return $idx if $str ~~ lc($_); |
147
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++$idx; |
148
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} |
149
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die "Bad log level [$str]"; |
150
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} |
151
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152
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sub timestamp { |
153
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my $now = Time::HiRes::time; |
154
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return strftime("%Y-%m-%d %H:%M:%S", gmtime($now)) . sprintf(".%03d", int($now * 1000.0) % 1000.0); |
155
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} |
156
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157
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=head2 OO METHODS |
158
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159
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=cut |
160
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161
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=head2 new |
162
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163
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Constructor - currently doesn't do much. |
164
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165
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=cut |
166
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167
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sub new { bless { path => 'entitymodel.log' }, shift } |
168
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169
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sub path { |
170
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my $self = shift; |
171
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if(@_) { |
172
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$self->close if $self->isOpen; |
173
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$self->{path} = shift; |
174
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$self->open; |
175
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return $self; |
176
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} |
177
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return $self->{path}; |
178
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} |
179
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180
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sub handle { |
181
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my $self = shift; |
182
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if(@_) { |
183
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$self->close if $self->isOpen; |
184
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$self->{handle} = shift; |
185
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$self->isOpen(1); |
186
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$self->pid($$); |
187
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return $self; |
188
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} |
189
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return $self->{handle}; |
190
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} |
191
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192
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sub pid { |
193
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my $self = shift; |
194
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if(@_) { |
195
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$self->{pid} = shift; |
196
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return $self; |
197
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} |
198
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return $self->{pid}; |
199
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} |
200
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201
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sub isOpen { |
202
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my $self = shift; |
203
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if(@_) { |
204
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$self->{isOpen} = shift; |
205
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return $self; |
206
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} |
207
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return $self->{isOpen}; |
208
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} |
209
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210
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sub disabled { |
211
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my $self = shift; |
212
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if(@_) { |
213
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$self->{disabled} = shift; |
214
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return $self; |
215
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} |
216
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return $self->{disabled}; |
217
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} |
218
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219
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sub close : method { |
220
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my $self = shift; |
221
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return $self unless $self->isOpen; |
222
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if($self->handle) { |
223
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close $self->handle; |
224
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} |
225
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226
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# Clear handle *after* isOpen status |
227
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$self->isOpen(0)->handle(undef); |
228
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} |
229
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230
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sub open : method { |
231
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my $self = shift; |
232
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return $self if $self->isOpen; |
233
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open my $fh, '>>', $self->path or die $! . " for " . $self->path; |
234
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binmode $fh, ':encoding(utf8)'; |
235
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$fh->autoflush(1); |
236
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$self->handle($fh)->isOpen(1)->pid($$); |
237
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} |
238
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239
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sub reopen { |
240
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my $self = shift; |
241
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$self->close if $self->isOpen; |
242
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$self->open; |
243
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return $self; |
244
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} |
245
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246
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=head2 parseMessage |
247
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248
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Generate appropriate text based on whatever we get passed. |
249
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250
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Each item in the parameter list is parsed first, then the resulting items are passed through L. If only a single item is in the list then the resulting string is returned directly. |
251
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252
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Item parsing handles the following types: |
253
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254
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=over 4 |
255
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256
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=item * Single string is passed through unchanged |
257
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258
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=item * Any coderef is expanded in place |
259
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260
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=item * Arrayref or hashref is expanded via L |
261
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262
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=item * Other references are stringified |
263
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264
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|
=item * Undef items are replaced with the text 'undef' |
265
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266
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=back |
267
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268
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=cut |
269
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270
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|
sub parseMessage { |
271
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|
my $self = shift; |
272
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|
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|
return '' unless @_; |
273
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274
|
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|
# Decompose parameters into strings |
275
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|
|
my @data; |
276
|
|
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|
|
ITEM: |
277
|
|
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|
|
|
|
while(@_) { |
278
|
|
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|
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|
|
my $entry = shift; |
279
|
|
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|
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|
|
|
280
|
|
|
|
|
|
|
# Convert to string if we can |
281
|
|
|
|
|
|
|
if(my $ref = ref $entry) { |
282
|
|
|
|
|
|
|
if($ref ~~ /^CODE/) { |
283
|
|
|
|
|
|
|
unshift @_, $entry->(); |
284
|
|
|
|
|
|
|
next ITEM; |
285
|
|
|
|
|
|
|
} elsif($ref ~~ [qw{ARRAY HASH}]) { |
286
|
|
|
|
|
|
|
$entry = Data::Dump::dump($entry); |
287
|
|
|
|
|
|
|
} else { |
288
|
|
|
|
|
|
|
$entry = "$entry"; |
289
|
|
|
|
|
|
|
} |
290
|
|
|
|
|
|
|
} |
291
|
|
|
|
|
|
|
$entry //= 'undef'; |
292
|
|
|
|
|
|
|
push @data, $entry; |
293
|
|
|
|
|
|
|
} |
294
|
|
|
|
|
|
|
|
295
|
|
|
|
|
|
|
# Format appropriately |
296
|
|
|
|
|
|
|
my $fmt = shift(@data) // ''; |
297
|
|
|
|
|
|
|
return $fmt unless @data; |
298
|
|
|
|
|
|
|
|
299
|
|
|
|
|
|
|
return sprintf($fmt, @data); |
300
|
|
|
|
|
|
|
} |
301
|
|
|
|
|
|
|
|
302
|
|
|
|
|
|
|
sub min_level { |
303
|
|
|
|
|
|
|
my $self = shift; |
304
|
|
|
|
|
|
|
if(@_) { |
305
|
|
|
|
|
|
|
$self->{min_level} = shift; |
306
|
|
|
|
|
|
|
return $self; |
307
|
|
|
|
|
|
|
} |
308
|
|
|
|
|
|
|
return $self->{min_level}; |
309
|
|
|
|
|
|
|
} |
310
|
|
|
|
|
|
|
|
311
|
|
|
|
|
|
|
=head2 raise |
312
|
|
|
|
|
|
|
|
313
|
|
|
|
|
|
|
Raise a log message |
314
|
|
|
|
|
|
|
|
315
|
|
|
|
|
|
|
=over 4 |
316
|
|
|
|
|
|
|
|
317
|
|
|
|
|
|
|
=item * $level - numeric log level |
318
|
|
|
|
|
|
|
|
319
|
|
|
|
|
|
|
=item * @data - message data |
320
|
|
|
|
|
|
|
|
321
|
|
|
|
|
|
|
=back |
322
|
|
|
|
|
|
|
|
323
|
|
|
|
|
|
|
=cut |
324
|
|
|
|
|
|
|
|
325
|
|
|
|
|
|
|
sub raise { |
326
|
|
|
|
|
|
|
my $self = shift; |
327
|
|
|
|
|
|
|
return $self if $self->disabled; |
328
|
|
|
|
|
|
|
|
329
|
|
|
|
|
|
|
my $level = shift; |
330
|
|
|
|
|
|
|
my ($pkg, $file, $line, $sub) = caller(1); |
331
|
|
|
|
|
|
|
|
332
|
|
|
|
|
|
|
# caller(0) gives us the wrong sub for our purposes - we want whatever raised the logXX line |
333
|
|
|
|
|
|
|
(undef, undef, undef, $sub) = caller(2); |
334
|
|
|
|
|
|
|
|
335
|
|
|
|
|
|
|
# Apply minimum log level based on method, then class, then default 'info' |
336
|
|
|
|
|
|
|
my $minLevel = ($sub ? $self->{mask}->{$sub}->{level} : undef); |
337
|
|
|
|
|
|
|
$minLevel //= $self->{mask}->{$pkg}->{level}; |
338
|
|
|
|
|
|
|
$minLevel //= $self->{min_level}; |
339
|
|
|
|
|
|
|
$minLevel //= 1; |
340
|
|
|
|
|
|
|
return $self if $minLevel > $level; |
341
|
|
|
|
|
|
|
|
342
|
|
|
|
|
|
|
my $txt = $self->parseMessage(@_); |
343
|
|
|
|
|
|
|
|
344
|
|
|
|
|
|
|
# Explicitly get time from Time::HiRes for ms accuracy |
345
|
|
|
|
|
|
|
my $ts = timestamp(); |
346
|
|
|
|
|
|
|
|
347
|
|
|
|
|
|
|
my $type = sprintf("%-8.8s", $LogType[$level]); |
348
|
|
|
|
|
|
|
$self->reopen unless $$ ~~ $self->pid; |
349
|
|
|
|
|
|
|
$self->open unless $self->isOpen; |
350
|
|
|
|
|
|
|
$self->handle->print("$ts $type $file:$line $txt\n"); |
351
|
|
|
|
|
|
|
return $self; |
352
|
|
|
|
|
|
|
} |
353
|
|
|
|
|
|
|
|
354
|
|
|
|
|
|
|
|
355
|
|
|
|
|
|
|
=head2 debug |
356
|
|
|
|
|
|
|
|
357
|
|
|
|
|
|
|
Log a message at debug level. |
358
|
|
|
|
|
|
|
|
359
|
|
|
|
|
|
|
=cut |
360
|
|
|
|
|
|
|
|
361
|
|
|
|
|
|
|
sub debug { |
362
|
|
|
|
|
|
|
my $self = shift; |
363
|
|
|
|
|
|
|
} |
364
|
|
|
|
|
|
|
|
365
|
|
|
|
|
|
|
END { $instance->close if $instance; } |
366
|
|
|
|
|
|
|
|
367
|
|
|
|
|
|
|
1; |
368
|
|
|
|
|
|
|
|
369
|
|
|
|
|
|
|
=head1 AUTHOR |
370
|
|
|
|
|
|
|
|
371
|
|
|
|
|
|
|
Tom Molesworth |
372
|
|
|
|
|
|
|
|
373
|
|
|
|
|
|
|
=head1 LICENSE |
374
|
|
|
|
|
|
|
|
375
|
|
|
|
|
|
|
Copyright Tom Molesworth 2008-2011. Licensed under the same terms as Perl itself. |
376
|
|
|
|
|
|
|
|