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package WebPAC::Common; |
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|
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use warnings; |
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use strict; |
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|
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use Log::Log4perl qw/get_logger :levels/; |
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use Time::HiRes qw/time/; |
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|
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# If ture, enable logging debug |
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my $log_debug = 0; |
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|
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=head1 NAME |
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|
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WebPAC::Common - internal methods called from other WebPAC modules |
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|
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=head1 VERSION |
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|
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Version 0.02 |
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=cut |
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our $VERSION = '0.02'; |
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|
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=head1 SYNOPSYS |
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|
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This module defines common functions, and is used as base for other, more |
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specific modules. |
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|
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=head1 FUNCTIONS |
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|
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=head2 progress_bar |
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|
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Draw progress bar on STDERR. |
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|
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$webpac->progress_bar($current, $max); |
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=cut |
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|
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sub progress_bar { |
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my $self = shift; |
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my ($curr,$max) = @_; |
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|
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my $log = $self->_get_logger(); |
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$log->logconfess("no current value!") if (! $curr); |
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$log->logconfess("no maximum value!") if (! $max); |
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|
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if ($curr > $max) { |
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$max = $curr; |
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$log->debug("overflow to $curr"); |
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} |
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|
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$self->{'last_pcnt'} ||= 1; |
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$self->{'start_t'} ||= time(); |
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|
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my $p = int($curr * 100 / $max) || 1; |
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|
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# reset on re-run |
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if ($p < $self->{'last_pcnt'}) { |
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$self->{'last_pcnt'} = $p; |
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$self->{'start_t'} = time(); |
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} |
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|
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if ($p != $self->{'last_pcnt'}) { |
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|
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my $t = time(); |
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my $rate = ($curr / ($t - $self->{'start_t'} || 1)); |
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my $eta = ($max-$curr) / ($rate || 1); |
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printf STDERR ("%5d [%-38s] %-5d %0.1f/s %s\r",$curr,"=" x ($p/3)."$p%>", $max, $rate, $self->fmt_time($eta)); |
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$self->{'last_pcnt'} = $p; |
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$self->{'last_curr'} = $curr; |
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} |
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print STDERR "\n" if ($p == 100); |
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} |
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|
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=head2 fmt_time |
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Format time (in seconds) for display. |
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print $webpac->fmt_time(time()); |
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This method is called by L<progress_bar> to display remaining time. |
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=cut |
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sub fmt_time { |
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my $self = shift; |
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my $t = shift || 0; |
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my $out = ""; |
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|
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my ($ss,$mm,$hh) = gmtime($t); |
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$out .= "${hh}h" if ($hh); |
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$out .= sprintf("%02d:%02d", $mm,$ss); |
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$out .= " " if ($hh == 0); |
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return $out; |
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} |
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|
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# |
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# |
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# |
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|
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=head1 INTERNAL METHODS |
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Here is a quick list of internal methods, mostly useful to turn debugging |
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on them (see L<LOGGING> below for explanation). |
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|
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=cut |
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|
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=head2 _eval |
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Internal function to eval code without C<strict 'subs'>. |
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=cut |
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sub _eval { |
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my $self = shift; |
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my $code = shift || return; |
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my $log = $self->_get_logger(); |
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no strict 'subs'; |
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my $ret = eval $code; |
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if ($@) { |
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$log->error("problem with eval code [$code]: $@"); |
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} |
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$log->debug("eval: ",$code," [",$ret,"]"); |
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return $ret || undef; |
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} |
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=head2 _init_logger |
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This function will init C<Log::Log4perl> using provided configuration file. |
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$webpac->_init_logger('/path/to/log.conf'); |
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If no path to configuration file is given, dummy empty configuration |
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will be created. If any mode which inherits from this one is called |
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with C<debug> flag, it will turn logging to debug level. |
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|
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This function will also read C<log_conf> value from current object and try |
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to read that as configuration file if it exists, if it doesn't it will |
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fallback to default C<conf/log.conf>. |
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|
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You can disable all logging by adding C<no_log> to constructor of WebPAC |
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object. Object in C<Test::Exception> class will disable logging |
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automatically. |
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|
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=cut |
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|
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sub _init_logger { |
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my $self = shift; |
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my $file = shift; |
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$file ||= $self->{'log_conf'}; |
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$file = 'conf/log.conf'; |
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my $name = (caller(2))[3] || caller; |
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|
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my $conf = q( ); |
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if ($self->{'no_log'}) { |
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warn "# $name disabled logging\n" if ($log_debug); |
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} elsif ($self->{'debug'}) { |
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$conf = << '_log4perl_'; |
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|
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log4perl.rootLogger=INFO, SCREEN |
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log4perl.logger.WebPAC.=DEBUG |
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log4perl.appender.SCREEN=Log::Log4perl::Appender::Screen |
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log4perl.appender.SCREEN.layout=PatternLayout |
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log4perl.appender.SCREEN.layout.ConversionPattern=%d %p> %F{1}:%L %M - %m%n |
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|
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_log4perl_ |
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warn "# $name is using debug logger\n" if ($log_debug); |
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} elsif ($name =~ m/Test::Exception/o) { |
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warn "# disabled logging for Text::Exception\n" if ($log_debug); |
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} elsif (-e $file) { |
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warn "# $name is using $file logger\n" if ($log_debug); |
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Log::Log4perl->init($file); |
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return 1; |
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} else { |
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warn "# $name is using null logger\n" if ($log_debug); |
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} |
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Log::Log4perl->init( \$conf ); |
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return 1; |
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} |
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=head2 _get_logger |
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Get C<Log::Log4perl> object with a twist: domains are defined for each |
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method |
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my $log = $webpac->_get_logger(); |
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=cut |
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|
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sub _get_logger { |
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my $self = shift; |
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my $name = (caller(2))[3] || caller; |
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$self->{'_logger_'} ||= $self->_init_logger; |
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warn "# get_logger( $name )\n" if ($log_debug); |
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return get_logger($name); |
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} |
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=head2 _log |
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Quick cludge to make logging object available to scripts which |
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use webpac line this: |
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my $log = _new WebPAC::Common()->_get_logger(); |
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|
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=cut |
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|
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sub _new { |
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my $class = shift; |
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my $self = {@_}; |
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bless($self, $class); |
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$self ? return $self : return undef; |
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} |
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=head1 LOGGING |
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Logging in WebPAC is performed by L<Log::Log4perl> with config file |
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C<log.conf>. |
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Methods defined above have different levels of logging, so |
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it's descriptions will be useful to turn (mostry B<debug> logging) on |
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or off to see why WabPAC isn't perforing as you expect it (it might even |
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be a bug!). |
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B<This is different from normal Log4perl behaviour>. To repeat, you can |
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also use method names, and not only classes (which are just few) |
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to filter logging. |
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