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#!/usr/bin/perl |
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package KiokuDB::Role::Scan; |
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use MooseX::Role::Parameterized; |
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168699
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83567
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use namespace::clean -except => 'meta'; |
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parameter result_class => ( |
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isa => "Str", |
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is => "ro", |
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required => 1, |
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); |
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role { |
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my $meta = shift; |
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my $result_class = $meta->result_class; |
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with qw(KiokuDB::Role::Verbosity); |
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has backend => ( |
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does => "KiokuDB::Backend::Role::Scan", |
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is => "ro", |
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required => 1, |
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); |
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has scan_all => ( |
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isa => "Bool", |
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is => "ro", |
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default => 1, |
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); |
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has scan_ids => ( |
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isa => "Bool", |
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is => "ro", |
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); |
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has entries => ( |
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does => "Data::Stream::Bulk", |
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is => "ro", |
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lazy_build => 1, |
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); |
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sub _build_entries { |
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my $self = shift; |
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my $backend = $self->backend; |
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my $set = $self->scan_all ? "all" : "root"; |
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my $type = $self->scan_ids ? "entry_ids" : "entries"; |
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my $method = join("_", $set, $type); |
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$backend->$method; |
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} |
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has [qw(block_callback entry_callback)] => ( |
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isa => "CodeRef|Str", |
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is => "ro", |
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); |
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has results => ( |
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isa => $result_class, |
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is => "ro", |
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handles => qr/.*/, |
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lazy_build => 1, |
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); |
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requires "process_block"; |
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method _build_results => sub { |
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my $self = shift; |
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731
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my $res = $result_class->new; |
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my $i = my $j = 0; |
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while ( my $next = $self->entries->next ) { |
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$i += @$next; |
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$j += @$next; |
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if ( $j > 13 ) { # luv primes |
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$j = 0; |
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$self->v("\rscanning... $i"); |
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} |
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$self->process_block( block => $next, results => $res ); |
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} |
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$self->v("\rscanned $i entries \n"); |
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return $res; |
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} |
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}; |
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__PACKAGE__ |
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__END__ |
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=pod |
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102
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=head1 NAME |
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KiokuDB::Role::Scan - A role for entry scanning. |
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=head1 SYNOPSIS |
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package My::Entry::Processor; |
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use Moose; |
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with 'KiokuDB::Role::Scan' => { result_class => "My::Entry::Processor::Results" }; |
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sub process_block { |
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my ( $self, %args ) = @_; |
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$args{results}; # intermediate results |
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foreach my $entry ( @{ $args{block} } ) { |
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} |
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} |
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my $scan = My::Entry::Processor->new( |
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backend => $some_backend, |
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); |
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my $res = $scan->results; |
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$res->foo; |
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$scan->foo; # delegates to result |
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=head1 DESCRIPTION |
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This role is used by classes like L<KiokuDB::LinkChecker> to scan the whole |
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database and computing summary results. |
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=head1 ROLE PARAMETERS |
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=over 4 |
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=item result_class |
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The class of the results. |
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Will be used when creating the results initially by calling C<new> and also |
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sets up an attribute with delegations. |
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=back |
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153
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=cut |
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