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use warnings; |
use warnings; |
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use strict; |
use strict; |
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use blib; |
use lib 'lib'; |
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use WebPAC::Common; |
use WebPAC::Common; |
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use base qw/WebPAC::Common/; |
use base qw/WebPAC::Common/; |
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use Data::Dumper; |
use Data::Dump qw/dump/; |
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use Encode qw/from_to/; |
use Encode qw/decode from_to/; |
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use YAML; |
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=head1 NAME |
=head1 NAME |
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WebPAC::Input - read different file formats into WebPAC |
WebPAC::Input - read different file formats into WebPAC |
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=head1 VERSION |
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Version 0.12 |
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=cut |
=cut |
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our $VERSION = '0.12'; |
our $VERSION = '0.19'; |
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=head1 SYNOPSIS |
=head1 SYNOPSIS |
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40 |
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41 |
my $db = WebPAC::Input->new( |
my $db = WebPAC::Input->new( |
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module => 'WebPAC::Input::ISIS', |
module => 'WebPAC::Input::ISIS', |
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low_mem => 1, |
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); |
); |
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$db->open( path => '/path/to/database' ); |
$db->open( path => '/path/to/database' ); |
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my $db = new WebPAC::Input( |
my $db = new WebPAC::Input( |
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module => 'WebPAC::Input::MARC', |
module => 'WebPAC::Input::MARC', |
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encoding => 'ISO-8859-2', |
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low_mem => 1, |
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recode => 'char pairs', |
recode => 'char pairs', |
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no_progress_bar => 1, |
no_progress_bar => 1, |
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input_config => { |
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mapping => [ 'foo', 'bar', 'baz' ], |
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}, |
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); |
); |
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C<module> is low-level file format module. See L<WebPAC::Input::ISIS> and |
C<module> is low-level file format module. See L<WebPAC::Input::ISIS> and |
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L<WebPAC::Input::MARC>. |
L<WebPAC::Input::MARC>. |
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Optional parametar C<encoding> specify application code page (which will be |
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used internally). This should probably be your terminal encoding, and by |
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default, it C<ISO-8859-2>. |
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Default is not to use C<low_mem> options (see L<MEMORY USAGE> below). |
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C<recode> is optional string constisting of character or words pairs that |
C<recode> is optional string constisting of character or words pairs that |
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should be replaced in input stream. |
should be replaced in input stream. |
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my $log = $self->_get_logger; |
my $log = $self->_get_logger; |
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$log->logconfess("code_page argument is not suppored any more. change it to encoding") if ($self->{lookup}); |
$log->logconfess("code_page argument is not suppored any more.") if $self->{code_page}; |
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$log->logconfess("lookup argument is not suppored any more. rewrite call to lookup_ref") if ($self->{lookup}); |
$log->logconfess("encoding argument is not suppored any more.") if $self->{encoding}; |
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$log->logconfess("lookup argument is not suppored any more. rewrite call to lookup_ref") if $self->{lookup}; |
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$log->logconfess("low_mem argument is not suppored any more. rewrite it to load_row and save_row") if $self->{low_mem}; |
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$log->logconfess("specify low-level file format module") unless ($self->{module}); |
$log->logconfess("specify low-level file format module") unless ($self->{module}); |
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my $module = $self->{module}; |
my $module_path = $self->{module}; |
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$module =~ s#::#/#g; |
$module_path =~ s#::#/#g; |
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$module .= '.pm'; |
$module_path .= '.pm'; |
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$log->debug("require low-level module $self->{module} from $module"); |
$log->debug("require low-level module $self->{module} from $module_path"); |
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require $module; |
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#eval $self->{module} .'->import'; |
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# check if required subclasses are implemented |
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foreach my $subclass (qw/open_db fetch_rec init/) { |
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my $n = $self->{module} . '::' . $subclass; |
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if (! defined &{ $n }) { |
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my $missing = "missing $subclass in $self->{module}"; |
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$self->{$subclass} = sub { $log->logwarn($missing) }; |
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} else { |
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$self->{$subclass} = \&{ $n }; |
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} |
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} |
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if ($self->{init}) { |
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$log->debug("calling init"); |
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$self->{init}->($self, @_); |
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} |
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$self->{'encoding'} ||= 'ISO-8859-2'; |
require $module_path; |
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# running with low_mem flag? well, use DBM::Deep then. |
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if ($self->{'low_mem'}) { |
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$log->info("running with low_mem which impacts performance (<32 Mb memory usage)"); |
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my $db_file = "data.db"; |
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if (-e $db_file) { |
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unlink $db_file or $log->logdie("can't remove '$db_file' from last run"); |
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$log->debug("removed '$db_file' from last run"); |
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} |
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require DBM::Deep; |
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my $db = new DBM::Deep $db_file; |
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$log->logdie("DBM::Deep error: $!") unless ($db); |
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if ($db->error()) { |
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$log->logdie("can't open '$db_file' under low_mem: ",$db->error()); |
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} else { |
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$log->debug("using file '$db_file' for DBM::Deep"); |
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} |
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$self->{'db'} = $db; |
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} |
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$self ? return $self : return undef; |
$self ? return $self : return undef; |
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} |
} |
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This function will read whole database in memory and produce lookups. |
This function will read whole database in memory and produce lookups. |
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my $store; # simple in-memory hash |
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$input->open( |
$input->open( |
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path => '/path/to/database/file', |
path => '/path/to/database/file', |
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code_page => 'cp852', |
input_encoding => 'cp852', |
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strict_encoding => 0, |
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limit => 500, |
limit => 500, |
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offset => 6000, |
offset => 6000, |
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lookup => $lookup_obj, |
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stats => 1, |
stats => 1, |
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lookup_ref => sub { |
lookup_coderef => sub { |
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my ($k,$v) = @_; |
my $rec = shift; |
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# store lookup $k => $v |
# store lookups |
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}, |
}, |
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modify_records => { |
modify_records => { |
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900 => { '^a' => { ' : ' => '^b' } }, |
900 => { '^a' => { ' : ' => '^b' } }, |
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901 => { '*' => { '^b' => ' ; ' } }, |
901 => { '*' => { '^b' => ' ; ' } }, |
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}, |
}, |
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modify_file => 'conf/modify/mapping.map', |
modify_file => 'conf/modify/mapping.map', |
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save_row => sub { |
127 |
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my $a = shift; |
128 |
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$store->{ $a->{id} } = $a->{row}; |
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}, |
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load_row => sub { |
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my $a = shift; |
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return defined($store->{ $a->{id} }) && |
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$store->{ $a->{id} }; |
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}, |
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); |
); |
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By default, C<code_page> is assumed to be C<cp852>. |
By default, C<input_encoding> is assumed to be C<cp852>. |
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C<offset> is optional parametar to position at some offset before reading from database. |
C<offset> is optional parametar to position at some offset before reading from database. |
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C<stats> create optional report about usage of fields and subfields |
C<stats> create optional report about usage of fields and subfields |
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C<lookup_coderef> is closure to call when adding C<< key => 'value' >> combinations to |
C<lookup_coderef> is closure to called to save data into lookups |
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lookup. |
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C<modify_records> specify mapping from subfields to delimiters or from |
C<modify_records> specify mapping from subfields to delimiters or from |
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delimiters to subfields, as well as oprations on fields (if subfield is |
delimiters to subfields, as well as oprations on fields (if subfield is |
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(hopefully) simplier sintax than YAML or perl (see L</modify_file_regex>). This option |
(hopefully) simplier sintax than YAML or perl (see L</modify_file_regex>). This option |
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overrides C<modify_records> if both exists for same input. |
overrides C<modify_records> if both exists for same input. |
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C<save_row> and C<load_row> are low-level implementation of store engine. Calling convention |
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is documented in example above. |
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C<strict_encoding> should really default to 1, but it doesn't for now. |
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Returns size of database, regardless of C<offset> and C<limit> |
Returns size of database, regardless of C<offset> and C<limit> |
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parametars, see also C<size>. |
parametars, see also C<size>. |
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my $arg = {@_}; |
my $arg = {@_}; |
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my $log = $self->_get_logger(); |
my $log = $self->_get_logger(); |
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$log->debug( "arguments: ",dump( $arg )); |
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$log->logconfess("encoding argument is not suppored any more.") if $self->{encoding}; |
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$log->logconfess("code_page argument is not suppored any more.") if $self->{code_page}; |
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$log->logconfess("lookup argument is not suppored any more. rewrite call to lookup_coderef") if ($arg->{lookup}); |
$log->logconfess("lookup argument is not suppored any more. rewrite call to lookup_coderef") if ($arg->{lookup}); |
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$log->logconfess("lookup_coderef must be CODE, not ",ref($arg->{lookup_coderef})) |
$log->logconfess("lookup_coderef must be CODE, not ",ref($arg->{lookup_coderef})) |
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if ($arg->{lookup_coderef} && ref($arg->{lookup_coderef}) ne 'CODE'); |
if ($arg->{lookup_coderef} && ref($arg->{lookup_coderef}) ne 'CODE'); |
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$log->debug( $arg->{lookup_coderef} ? '' : 'not ', "using lookup_coderef"); |
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$log->logcroak("need path") if (! $arg->{'path'}); |
$log->logcroak("need path") if (! $arg->{'path'}); |
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my $code_page = $arg->{'code_page'} || 'cp852'; |
my $input_encoding = $arg->{'input_encoding'} || $self->{'input_encoding'} || 'cp852'; |
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# store data in object |
# store data in object |
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$self->{'input_code_page'} = $code_page; |
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foreach my $v (qw/path offset limit/) { |
foreach my $v (qw/path offset limit/) { |
186 |
$self->{$v} = $arg->{$v} if ($arg->{$v}); |
$self->{$v} = $arg->{$v} if ($arg->{$v}); |
187 |
} |
} |
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189 |
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if ($arg->{load_row} || $arg->{save_row}) { |
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$log->logconfess("save_row and load_row must be defined in pair and be CODE") unless ( |
191 |
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ref($arg->{load_row}) eq 'CODE' && |
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ref($arg->{save_row}) eq 'CODE' |
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); |
194 |
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$self->{load_row} = $arg->{load_row}; |
195 |
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$self->{save_row} = $arg->{save_row}; |
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$log->debug("using load_row and save_row instead of in-memory hash"); |
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} |
198 |
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199 |
my $filter_ref; |
my $filter_ref; |
200 |
my $recode_regex; |
my $recode_regex; |
201 |
my $recode_map; |
my $recode_map; |
223 |
$log->debug("using modify_file $p"); |
$log->debug("using modify_file $p"); |
224 |
$rec_regex = $self->modify_file_regexps( $p ); |
$rec_regex = $self->modify_file_regexps( $p ); |
225 |
} elsif (my $h = $arg->{modify_records}) { |
} elsif (my $h = $arg->{modify_records}) { |
226 |
$log->debug("using modify_records ", Dumper( $h )); |
$log->debug("using modify_records ", sub { dump( $h ) }); |
227 |
$rec_regex = $self->modify_record_regexps(%{ $h }); |
$rec_regex = $self->modify_record_regexps(%{ $h }); |
228 |
} |
} |
229 |
$log->debug("rec_regex: ", Dumper($rec_regex)) if ($rec_regex); |
$log->debug("rec_regex: ", sub { dump($rec_regex) }) if ($rec_regex); |
230 |
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231 |
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my $class = $self->{module} || $log->logconfess("can't get low-level module name!"); |
232 |
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233 |
my ($db, $size) = $self->{open_db}->( $self, |
my $ll_db = $class->new( |
234 |
path => $arg->{path}, |
path => $arg->{path}, |
235 |
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input_config => $arg->{input_config} || $self->{input_config}, |
236 |
# filter => sub { |
# filter => sub { |
237 |
# my ($l,$f_nr) = @_; |
# my ($l,$f_nr) = @_; |
238 |
# return unless defined($l); |
# return unless defined($l); |
239 |
# from_to($l, $code_page, $self->{'encoding'}); |
# $l = decode($input_encoding, $l); |
240 |
# $l =~ s/($recode_regex)/$recode_map->{$1}/g if ($recode_regex && $recode_map); |
# $l =~ s/($recode_regex)/$recode_map->{$1}/g if ($recode_regex && $recode_map); |
241 |
# return $l; |
# return $l; |
242 |
# }, |
# }, |
243 |
%{ $arg }, |
%{ $arg }, |
244 |
); |
); |
245 |
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246 |
unless (defined($db)) { |
unless (defined($ll_db)) { |
247 |
$log->logwarn("can't open database $arg->{path}, skipping..."); |
$log->logwarn("can't open database $arg->{path}, skipping..."); |
248 |
return; |
return; |
249 |
} |
} |
250 |
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251 |
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my $size = $ll_db->size; |
252 |
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253 |
unless ($size) { |
unless ($size) { |
254 |
$log->logwarn("no records in database $arg->{path}, skipping..."); |
$log->logwarn("no records in database $arg->{path}, skipping..."); |
255 |
return; |
return; |
274 |
# store size for later |
# store size for later |
275 |
$self->{size} = ($to_rec - $from_rec) ? ($to_rec - $from_rec + 1) : 0; |
$self->{size} = ($to_rec - $from_rec) ? ($to_rec - $from_rec + 1) : 0; |
276 |
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277 |
$log->info("processing $self->{size}/$size records [$from_rec-$to_rec] convert $code_page -> $self->{encoding}", $self->{stats} ? ' [stats]' : ''); |
my $strict_encoding = $arg->{strict_encoding} || $self->{strict_encoding}; ## FIXME should be 1 really |
278 |
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279 |
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$log->info("processing $self->{size}/$size records [$from_rec-$to_rec]", |
280 |
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" encoding $input_encoding ", $strict_encoding ? ' [strict]' : '', |
281 |
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$self->{stats} ? ' [stats]' : '', |
282 |
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); |
283 |
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284 |
# read database |
# read database |
285 |
for (my $pos = $from_rec; $pos <= $to_rec; $pos++) { |
for (my $pos = $from_rec; $pos <= $to_rec; $pos++) { |
286 |
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287 |
$log->debug("position: $pos\n"); |
$log->debug("position: $pos\n"); |
288 |
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289 |
my $rec = $self->{fetch_rec}->($self, $db, $pos, sub { |
my $rec = $ll_db->fetch_rec($pos, sub { |
290 |
my ($l,$f_nr) = @_; |
my ($l,$f_nr,$debug) = @_; |
291 |
# return unless defined($l); |
# return unless defined($l); |
292 |
# return $l unless ($rec_regex && $f_nr); |
# return $l unless ($rec_regex && $f_nr); |
293 |
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294 |
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return unless ( defined($l) && defined($f_nr) ); |
295 |
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296 |
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warn "-=> $f_nr ## |$l|\n" if ($debug); |
297 |
$log->debug("-=> $f_nr ## $l"); |
$log->debug("-=> $f_nr ## $l"); |
298 |
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|
299 |
# codepage conversion and recode_regex |
# codepage conversion and recode_regex |
300 |
from_to($l, $code_page, $self->{'encoding'}); |
$l = decode($input_encoding, $l, 1); |
301 |
$l =~ s/($recode_regex)/$recode_map->{$1}/g if ($recode_regex && $recode_map); |
$l =~ s/($recode_regex)/$recode_map->{$1}/g if ($recode_regex && $recode_map); |
302 |
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|
303 |
# apply regexps |
# apply regexps |
306 |
my $c = 0; |
my $c = 0; |
307 |
foreach my $r (@{ $rec_regex->{$f_nr} }) { |
foreach my $r (@{ $rec_regex->{$f_nr} }) { |
308 |
my $old_l = $l; |
my $old_l = $l; |
309 |
eval '$l =~ ' . $r; |
$log->logconfess("expected regex in ", dump( $r )) unless defined($r->{regex}); |
310 |
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eval '$l =~ ' . $r->{regex}; |
311 |
if ($old_l ne $l) { |
if ($old_l ne $l) { |
312 |
$log->debug("REGEX on $f_nr eval \$l =~ $r\n## old l: [$old_l]\n## new l: [$l]"); |
my $d = "|$old_l| -> |$l| "; # . $r->{regex}; |
313 |
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$d .= ' +' . $r->{line} . ' ' . $r->{file} if defined($r->{line}); |
314 |
|
$d .= ' ' . $r->{debug} if defined($r->{debug}); |
315 |
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$log->debug("MODIFY $d"); |
316 |
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warn "*** $d\n" if ($debug); |
317 |
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|
318 |
} |
} |
319 |
$log->error("error applying regex: $r") if ($@); |
$log->error("error applying regex: ",dump($r), $@) if $@; |
320 |
} |
} |
321 |
} |
} |
322 |
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323 |
$log->debug("<=- $f_nr ## $l"); |
$log->debug("<=- $f_nr ## |$l|"); |
324 |
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warn "<=- $f_nr ## $l\n" if ($debug); |
325 |
return $l; |
return $l; |
326 |
}); |
}); |
327 |
|
|
328 |
$log->debug(sub { Dumper($rec) }); |
$log->debug(sub { dump($rec) }); |
329 |
|
|
330 |
if (! $rec) { |
if (! $rec) { |
331 |
$log->warn("record $pos empty? skipping..."); |
$log->warn("record $pos empty? skipping..."); |
333 |
} |
} |
334 |
|
|
335 |
# store |
# store |
336 |
if ($self->{low_mem}) { |
if ($self->{save_row}) { |
337 |
$self->{db}->put($pos, $rec); |
$self->{save_row}->({ |
338 |
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id => $pos, |
339 |
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row => $rec, |
340 |
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}); |
341 |
} else { |
} else { |
342 |
$self->{data}->{$pos} = $rec; |
$self->{data}->{$pos} = $rec; |
343 |
} |
} |
349 |
if ($self->{stats}) { |
if ($self->{stats}) { |
350 |
|
|
351 |
# fetch clean record with regexpes applied for statistics |
# fetch clean record with regexpes applied for statistics |
352 |
my $rec = $self->{fetch_rec}->($self, $db, $pos); |
my $rec = $ll_db->fetch_rec($pos); |
353 |
|
|
354 |
foreach my $fld (keys %{ $rec }) { |
foreach my $fld (keys %{ $rec }) { |
355 |
$self->{_stats}->{fld}->{ $fld }++; |
$self->{_stats}->{fld}->{ $fld }++; |
356 |
|
|
357 |
$log->logdie("invalid record fild $fld, not ARRAY") |
#$log->logdie("invalid record fild $fld, not ARRAY") |
358 |
unless (ref($rec->{ $fld }) eq 'ARRAY'); |
next unless (ref($rec->{ $fld }) eq 'ARRAY'); |
359 |
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|
360 |
foreach my $row (@{ $rec->{$fld} }) { |
foreach my $row (@{ $rec->{$fld} }) { |
361 |
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|
386 |
$self->{max_pos} = $to_rec; |
$self->{max_pos} = $to_rec; |
387 |
$log->debug("max_pos: $to_rec"); |
$log->debug("max_pos: $to_rec"); |
388 |
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389 |
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# save for dump |
390 |
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$self->{ll_db} = $ll_db; |
391 |
|
|
392 |
return $size; |
return $size; |
393 |
} |
} |
394 |
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|
428 |
|
|
429 |
my $rec; |
my $rec; |
430 |
|
|
431 |
if ($self->{low_mem}) { |
if ($self->{load_row}) { |
432 |
$rec = $self->{db}->get($mfn); |
$rec = $self->{load_row}->({ id => $mfn }); |
433 |
} else { |
} else { |
434 |
$rec = $self->{data}->{$mfn}; |
$rec = $self->{data}->{$mfn}; |
435 |
} |
} |
484 |
|
|
485 |
sub seek { |
sub seek { |
486 |
my $self = shift; |
my $self = shift; |
487 |
my $pos = shift || return; |
my $pos = shift; |
488 |
|
|
489 |
my $log = $self->_get_logger(); |
my $log = $self->_get_logger(); |
490 |
|
|
491 |
|
$log->logconfess("called without pos") unless defined($pos); |
492 |
|
|
493 |
if ($pos < 1) { |
if ($pos < 1) { |
494 |
$log->warn("seek before first record"); |
$log->warn("seek before first record"); |
495 |
$pos = 1; |
$pos = 1; |
524 |
|
|
525 |
my $out = join("\n", |
my $out = join("\n", |
526 |
map { |
map { |
527 |
my $f = $_ || die "no field"; |
my $f = $_; |
528 |
|
die "no field in ", dump( $s->{fld} ) unless defined( $f ); |
529 |
my $v = $s->{fld}->{$f} || die "no s->{fld}->{$f}"; |
my $v = $s->{fld}->{$f} || die "no s->{fld}->{$f}"; |
530 |
$max_fld = $v if ($v > $max_fld); |
$max_fld = $v if ($v > $max_fld); |
531 |
|
|
532 |
my $o = sprintf("%4s %d ~", $f, $v); |
my $o = sprintf("%4s %d ~", $f, $v); |
533 |
|
|
534 |
if (defined($s->{sf}->{$f})) { |
if (defined($s->{sf}->{$f})) { |
535 |
|
my @subfields = keys %{ $s->{sf}->{$f} }; |
536 |
map { |
map { |
537 |
$o .= sprintf(" %s:%d%s", $_, |
$o .= sprintf(" %s:%d%s", $_, |
538 |
$s->{sf}->{$f}->{$_}->{count}, |
$s->{sf}->{$f}->{$_}->{count}, |
539 |
$s->{sf}->{$f}->{$_}->{repeatable} ? '*' : '', |
$s->{sf}->{$f}->{$_}->{repeatable} ? '*' : '', |
540 |
); |
); |
541 |
} sort keys %{ $s->{sf}->{$f} }; |
} ( |
542 |
|
# first indicators and other special subfields |
543 |
|
sort( grep { length($_) > 1 } @subfields ), |
544 |
|
# then subfileds (single char) |
545 |
|
sort( grep { length($_) == 1 } @subfields ), |
546 |
|
); |
547 |
} |
} |
548 |
|
|
549 |
if (my $v_r = $s->{repeatable}->{$f}) { |
if (my $v_r = $s->{repeatable}->{$f}) { |
551 |
} |
} |
552 |
|
|
553 |
$o; |
$o; |
554 |
} sort { $a cmp $b } keys %{ $s->{fld} } |
} sort { |
555 |
|
if ( $a =~ m/^\d+$/ && $b =~ m/^\d+$/ ) { |
556 |
|
$a <=> $b |
557 |
|
} else { |
558 |
|
$a cmp $b |
559 |
|
} |
560 |
|
} keys %{ $s->{fld} } |
561 |
); |
); |
562 |
|
|
563 |
$log->debug( sub { Dumper($s) } ); |
$log->debug( sub { dump($s) } ); |
564 |
|
|
565 |
|
my $path = 'var/stats.yml'; |
566 |
|
YAML::DumpFile( $path, $s ); |
567 |
|
$log->info( 'created ', $path, ' with ', -s $path, ' bytes' ); |
568 |
|
|
569 |
return $out; |
return $out; |
570 |
} |
} |
571 |
|
|
572 |
=head2 modify_record_regexps |
=head2 dump_ascii |
573 |
|
|
574 |
Generate hash with regexpes to be applied using l<filter>. |
Display humanly readable dump of record |
575 |
|
|
576 |
my $regexpes = $input->modify_record_regexps( |
=cut |
577 |
900 => { '^a' => { ' : ' => '^b' } }, |
|
578 |
901 => { '*' => { '^b' => ' ; ' } }, |
sub dump_ascii { |
579 |
); |
my $self = shift; |
580 |
|
|
581 |
|
return unless $self->{ll_db}; |
582 |
|
|
583 |
|
if ($self->{ll_db}->can('dump_ascii')) { |
584 |
|
return $self->{ll_db}->dump_ascii( $self->{pos} ); |
585 |
|
} else { |
586 |
|
return dump( $self->{ll_db}->fetch_rec( $self->{pos} ) ); |
587 |
|
} |
588 |
|
} |
589 |
|
|
590 |
|
=head2 _get_regex |
591 |
|
|
592 |
|
Helper function called which create regexps to be execute on code. |
593 |
|
|
594 |
|
_get_regex( 900, 'regex:[0-9]+' ,'numbers' ); |
595 |
|
_get_regex( 900, '^b', ' : ^b' ); |
596 |
|
|
597 |
|
It supports perl regexps with C<regex:> prefix to from value and has |
598 |
|
additional logic to skip empty subfields. |
599 |
|
|
600 |
=cut |
=cut |
601 |
|
|
602 |
sub _get_regex { |
sub _get_regex { |
603 |
my ($sf,$from,$to) = @_; |
my ($sf,$from,$to) = @_; |
604 |
|
|
605 |
|
# protect / |
606 |
|
$from =~ s!/!\\/!gs; |
607 |
|
$to =~ s!/!\\/!gs; |
608 |
|
|
609 |
|
if ($from =~ m/^regex:(.+)$/) { |
610 |
|
$from = $1; |
611 |
|
} else { |
612 |
|
$from = '\Q' . $from . '\E'; |
613 |
|
} |
614 |
if ($sf =~ /^\^/) { |
if ($sf =~ /^\^/) { |
615 |
|
my $need_subfield_data = '*'; # no |
616 |
|
# if from is also subfield, require some data in between |
617 |
|
# to correctly skip empty subfields |
618 |
|
$need_subfield_data = '+' if ($from =~ m/^\\Q\^/); |
619 |
return |
return |
620 |
's/\Q'. $sf .'\E([^\^]*?)\Q'. $from .'\E([^\^]*?)/'. $sf .'$1'. $to .'$2/'; |
's/\Q'. $sf .'\E([^\^]' . $need_subfield_data . '?)'. $from .'([^\^]*?)/'. $sf .'$1'. $to .'$2/'; |
621 |
} else { |
} else { |
622 |
return |
return |
623 |
's/\Q'. $from .'\E/'. $to .'/g'; |
's/'. $from .'/'. $to .'/g'; |
624 |
} |
} |
625 |
} |
} |
626 |
|
|
627 |
|
|
628 |
|
=head2 modify_record_regexps |
629 |
|
|
630 |
|
Generate hash with regexpes to be applied using L<filter>. |
631 |
|
|
632 |
|
my $regexpes = $input->modify_record_regexps( |
633 |
|
900 => { '^a' => { ' : ' => '^b' } }, |
634 |
|
901 => { '*' => { '^b' => ' ; ' } }, |
635 |
|
); |
636 |
|
|
637 |
|
=cut |
638 |
|
|
639 |
sub modify_record_regexps { |
sub modify_record_regexps { |
640 |
my $self = shift; |
my $self = shift; |
641 |
my $modify_record = {@_}; |
my $modify_record = {@_}; |
653 |
foreach my $from (keys %{ $modify_record->{$f}->{$sf} }) { |
foreach my $from (keys %{ $modify_record->{$f}->{$sf} }) { |
654 |
my $to = $modify_record->{$f}->{$sf}->{$from}; |
my $to = $modify_record->{$f}->{$sf}->{$from}; |
655 |
#die "no field?" unless defined($to); |
#die "no field?" unless defined($to); |
656 |
$log->debug("transform: |$from| -> |$to|"); |
my $d = "|$from| -> |$to|"; |
657 |
|
$log->debug("transform: $d"); |
658 |
|
|
659 |
my $regex = _get_regex($sf,$from,$to); |
my $regex = _get_regex($sf,$from,$to); |
660 |
push @{ $regexpes->{$f} }, $regex; |
push @{ $regexpes->{$f} }, { regex => $regex, debug => $d }; |
661 |
$log->debug("regex: $regex"); |
$log->debug("regex: $regex"); |
662 |
} |
} |
663 |
} |
} |
668 |
|
|
669 |
=head2 modify_file_regexps |
=head2 modify_file_regexps |
670 |
|
|
671 |
Generate hash with regexpes to be applied using l<filter> from |
Generate hash with regexpes to be applied using L<filter> from |
672 |
pseudo hash/yaml format for regex mappings. |
pseudo hash/yaml format for regex mappings. |
673 |
|
|
674 |
It should be obvious: |
It should be obvious: |
696 |
|
|
697 |
my $regexpes; |
my $regexpes; |
698 |
|
|
699 |
CORE::open(my $fh, $modify_path) || $log->die("can't open modify file $modify_path: $!"); |
CORE::open(my $fh, $modify_path) || $log->logdie("can't open modify file $modify_path: $!"); |
700 |
|
|
701 |
my ($f,$sf); |
my ($f,$sf); |
702 |
|
|
718 |
$log->debug("transform: |$from| -> |$to|"); |
$log->debug("transform: |$from| -> |$to|"); |
719 |
|
|
720 |
my $regex = _get_regex($sf,$from,$to); |
my $regex = _get_regex($sf,$from,$to); |
721 |
push @{ $regexpes->{$f} }, $regex; |
push @{ $regexpes->{$f} }, { |
722 |
|
regex => $regex, |
723 |
|
file => $modify_path, |
724 |
|
line => $., |
725 |
|
}; |
726 |
$log->debug("regex: $regex"); |
$log->debug("regex: $regex"); |
727 |
|
} else { |
728 |
|
die "can't parse: $_"; |
729 |
} |
} |
730 |
} |
} |
731 |
|
|
732 |
return $regexpes; |
return $regexpes; |
733 |
} |
} |
734 |
|
|
|
=head1 MEMORY USAGE |
|
|
|
|
|
C<low_mem> options is double-edged sword. If enabled, WebPAC |
|
|
will run on memory constraint machines (which doesn't have enough |
|
|
physical RAM to create memory structure for whole source database). |
|
|
|
|
|
If your machine has 512Mb or more of RAM and database is around 10000 records, |
|
|
memory shouldn't be an issue. If you don't have enough physical RAM, you |
|
|
might consider using virtual memory (if your operating system is handling it |
|
|
well, like on FreeBSD or Linux) instead of dropping to L<DBM::Deep> to handle |
|
|
parsed structure of ISIS database (this is what C<low_mem> option does). |
|
|
|
|
|
Hitting swap at end of reading source database is probably o.k. However, |
|
|
hitting swap before 90% will dramatically decrease performance and you will |
|
|
be better off with C<low_mem> and using rest of availble memory for |
|
|
operating system disk cache (Linux is particuallary good about this). |
|
|
However, every access to database record will require disk access, so |
|
|
generation phase will be slower 10-100 times. |
|
|
|
|
|
Parsed structures are essential - you just have option to trade RAM memory |
|
|
(which is fast) for disk space (which is slow). Be sure to have planty of |
|
|
disk space if you are using C<low_mem> and thus L<DBM::Deep>. |
|
|
|
|
|
However, when WebPAC is running on desktop machines (or laptops :-), it's |
|
|
highly undesireable for system to start swapping. Using C<low_mem> option can |
|
|
reduce WecPAC memory usage to around 64Mb for same database with lookup |
|
|
fields and sorted indexes which stay in RAM. Performance will suffer, but |
|
|
memory usage will really be minimal. It might be also more confortable to |
|
|
run WebPAC reniced on those machines. |
|
|
|
|
|
|
|
735 |
=head1 AUTHOR |
=head1 AUTHOR |
736 |
|
|
737 |
Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |