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package DTL::Fast::Cache; |
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use strict; use warnings FATAL => 'all'; |
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# This is a prototype class for caching templates |
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sub new |
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{ |
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my( $proto, %kwargs ) = @_; |
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@kwargs{'hits','misses'} = (0,0); |
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return bless{ %kwargs }, $proto; |
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} |
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sub get |
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{ |
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my( $self, $key ) = @_; |
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my $template = $self->validate_template( |
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$self->read_data( |
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$key |
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) |
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); |
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defined $template ? |
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$self->{'hits'}++ |
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: $self->{'misses'}++; |
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return $template; |
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} |
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sub put |
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{ |
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my( $self, $key, $template, %kwargs ) = @_; |
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if( defined $template ) |
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{ |
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my @keys = ('cache','url_source'); |
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my @backup = @{$template}{@keys}; |
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delete @{$template}{@keys}; |
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$self->write_data($key, $template, %kwargs); |
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@{$template}{@keys} = @backup; |
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} |
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return $self; |
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} |
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sub read_data |
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{ |
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my( $self, $key ) = @_; |
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die "read_data method was not defined in ".(ref $self); |
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} |
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sub clear |
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{ |
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my( $self ) = @_; |
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die "clear method was not defined in ".(ref $self); |
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} |
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sub write_data |
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{ |
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my( $self, $key, $value ) = @_; |
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die "write_data method was not defined in ".(ref $self); |
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} |
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sub validate_template |
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{ |
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my( $self, $template ) = @_; |
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100
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return if not defined $template; |
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# here we check if template is still valid |
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# check perl version |
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return if not $template->{'perl'} or $template->{'perl'} != $]; |
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# check modules version |
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if( my $modules = $template->{'modules'} ) |
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{ |
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foreach my $module (keys(%$modules)) |
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{ |
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my $current_version = $module->VERSION // $DTL::Fast::VERSION; |
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return if $modules->{$module} ne $current_version; |
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} |
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} |
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# check files modification |
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if( my $files = $template->{'inherits'} ) |
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{ |
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foreach my $file (keys( %$files )) |
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{ |
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next if $file eq 'inline'; |
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return if |
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not -e $file |
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or $files->{$file} != (stat($file))[9] |
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} |
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} |
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return $template; |
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} |
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1; |