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package KinoSearch1::Store::RAMInvIndex; |
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38
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38
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274077
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use strict; |
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588
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38
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1482
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3
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38
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634
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use warnings; |
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38
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1101
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4
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38
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38
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5648
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use KinoSearch1::Util::ToolSet; |
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104
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38
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6058
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5
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38
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38
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238
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use base qw( KinoSearch1::Store::InvIndex ); |
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75
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38
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9601
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6
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7
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BEGIN { |
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38
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38
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568
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__PACKAGE__->init_instance_vars( |
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# members |
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ramfiles => undef, |
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); |
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} |
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38
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38
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238
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use Digest::MD5 qw( md5_hex ); |
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82
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38
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2027
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15
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38
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38
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6623
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use KinoSearch1::Store::FSInvIndex; |
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38
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86
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38
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952
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38
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38
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341
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use KinoSearch1::Store::InStream; |
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90
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38
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1038
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17
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38
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38
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204
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use KinoSearch1::Store::OutStream; |
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38
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72
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38
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1070
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18
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38
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38
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21481
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use KinoSearch1::Store::RAMLock; |
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38
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155
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38
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32002
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sub init_instance { |
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48
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48
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1
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110
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my $self = shift; |
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48
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373
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$self->{ramfiles} = {}; |
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# read in an FSInvIndex if specified |
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100
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286
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$self->_read_invindex if defined $self->{path}; |
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} |
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sub _read_invindex { |
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1
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1
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my $self = shift; |
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31
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# open an FSInvIndex for reading |
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1
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my $source_invindex |
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= KinoSearch1::Store::FSInvIndex->new( path => $self->{path}, ); |
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35
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# copy every file in the FSInvIndex into RAM. |
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1
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for my $filename ( $source_invindex->list ) { |
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1
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my $source_stream = $source_invindex->open_instream($filename); |
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1
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my $outstream = $self->open_outstream($filename); |
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1
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$outstream->absorb($source_stream); |
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1
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$source_stream->close; |
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1
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$outstream->close; |
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} |
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1
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6
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$source_invindex->close; |
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} |
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47
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sub open_outstream { |
48
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839
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839
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0
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18636
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my ( $self, $filename ) = @_; |
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50
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# use perl scalars as virtual files; |
51
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839
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1160
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my $data = ''; |
52
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839
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2272
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$self->{ramfiles}{$filename} = \$data; |
53
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839
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50
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32
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9845
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open( my $fh, '>:scalar', \$data ) or die $!; |
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410
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32
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67
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32
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327
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54
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839
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53261
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binmode($fh); |
55
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839
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10740
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return KinoSearch1::Store::OutStream->new($fh); |
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} |
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58
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sub open_instream { |
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619
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619
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0
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1116
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my ( $self, $filename, $offset, $len ) = @_; |
60
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619
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50
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1891
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confess("File '$filename' not loaded into RAM") |
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unless exists $self->{ramfiles}{$filename}; |
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619
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50
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9240
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open( my $fh, '<:scalar', $self->{ramfiles}{$filename} ) or die $!; |
63
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619
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935
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binmode($fh); |
64
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619
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6305
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return KinoSearch1::Store::InStream->new( $$fh, $offset, $len ); |
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} |
66
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67
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sub list { |
68
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1
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1
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0
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590
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keys %{ $_[0]->{ramfiles} }; |
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1
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9
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69
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} |
70
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71
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sub file_exists { |
72
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1206
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1206
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0
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2150
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my ( $self, $filename ) = @_; |
73
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1206
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7462
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return ( exists $self->{ramfiles}{$filename} ); |
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} |
75
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76
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sub rename_file { |
77
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135
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135
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0
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299
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my ( $self, $from, $to ) = @_; |
78
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135
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50
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490
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confess("File '$from' not currently in RAM") |
79
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unless exists $self->{ramfiles}{$from}; |
80
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135
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1578
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$self->{ramfiles}{$to} = delete $self->{ramfiles}{$from}; |
81
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} |
82
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83
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sub delete_file { |
84
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672
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672
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0
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1600
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my ( $self, $filename ) = @_; |
85
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672
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1548
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my $file = delete $self->{ramfiles}{$filename}; |
86
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672
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50
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3531
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confess("File '$filename' not currently in RAM") |
87
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unless $file; |
88
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} |
89
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90
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sub slurp_file { |
91
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11
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11
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0
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21276
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my ( $self, $filename ) = @_; |
92
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11
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37
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my $virtual_file_ref = $self->{ramfiles}{$filename}; |
93
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11
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50
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41
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confess("File '$filename' not currently in RAM") |
94
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unless defined $virtual_file_ref; |
95
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96
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# return a copy of the virtual file's content |
97
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11
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79
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return $$virtual_file_ref; |
98
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} |
99
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100
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sub make_lock { |
101
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190
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190
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0
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1011
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my $self = shift; |
102
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190
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1401
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return KinoSearch1::Store::RAMLock->new( @_, invindex => $self ); |
103
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} |
104
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0
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0
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0
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0
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sub close { } |
105
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106
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1; |
107
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108
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__END__ |