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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 Text::Iconv; |
use Data::Dump qw/dump/; |
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use Encode qw/decode from_to/; |
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=head1 NAME |
=head1 NAME |
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| 15 |
WebPAC::Input - core module for input file format |
WebPAC::Input - read different file formats into WebPAC |
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=head1 VERSION |
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Version 0.02 |
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=cut |
=cut |
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our $VERSION = '0.02'; |
our $VERSION = '0.19'; |
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=head1 SYNOPSIS |
=head1 SYNOPSIS |
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This module is used as base class for all database specific modules |
This module implements input as database which have fixed and known |
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(basically, files which have one handle, fixed size while indexing and some |
I<size> while indexing and single unique numeric identifier for database |
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kind of numeric idefinirier which goes from 1 to filesize). |
position ranging from 1 to I<size>. |
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Simply, something that is indexed by unmber from 1 .. I<size>. |
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Examples of such databases are CDS/ISIS files, MARC files, lines in |
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text file, and so on. |
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Specific file formats are implemented using low-level interface modules, |
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located in C<WebPAC::Input::*> namespace which export C<open_db>, |
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C<fetch_rec> and optional C<init> functions. |
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Perhaps a little code snippet. |
Perhaps a little code snippet. |
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use WebPAC::Input; |
use WebPAC::Input; |
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my $db = WebPAC::Input->new( |
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module => 'WebPAC::Input::ISIS', |
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); |
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| 44 |
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$db->open( path => '/path/to/database' ); |
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print "database size: ",$db->size,"\n"; |
| 46 |
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while (my $rec = $db->fetch) { |
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# do something with $rec |
| 48 |
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} |
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my $db = WebPAC::Input->new( |
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format => 'NULL', |
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config => $config, |
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lookup => $lookup_obj, |
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low_mem => 1, |
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); |
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$db->open('/path/to/database'); |
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print "database size: ",$db->size,"\n"; |
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while (my $row = $db->fetch) { |
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... |
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} |
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=head1 FUNCTIONS |
=head1 FUNCTIONS |
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Create new input database object. |
Create new input database object. |
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my $db = new WebPAC::Input( |
my $db = new WebPAC::Input( |
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format => 'NULL' |
module => 'WebPAC::Input::MARC', |
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code_page => 'ISO-8859-2', |
recode => 'char pairs', |
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low_mem => 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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Optional parametar C<code_page> specify application code page (which will be |
C<module> is low-level file format module. See L<WebPAC::Input::ISIS> and |
| 68 |
used internally). This should probably be your terminal encoding, and by |
L<WebPAC::Input::MARC>. |
| 69 |
default, it C<ISO-8859-2>. |
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C<recode> is optional string constisting of character or words pairs that |
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should be replaced in input stream. |
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Default is not to use C<low_mem> options (see L<MEMORY USAGE> below). |
C<no_progress_bar> disables progress bar output on C<STDOUT> |
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This function will also call low-level C<init> if it exists with same |
This function will also call low-level C<init> if it exists with same |
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parametars. |
parametars. |
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| 85 |
my $log = $self->_get_logger; |
my $log = $self->_get_logger; |
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| 87 |
# check if required subclasses are implemented |
$log->logconfess("code_page argument is not suppored any more.") if $self->{code_page}; |
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foreach my $subclass (qw/open_db fetch_rec/) { |
$log->logconfess("encoding argument is not suppored any more.") if $self->{encoding}; |
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$log->logdie("missing implementation of $subclass") unless ($self->SUPER::can($subclass)); |
$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 $self->{low_mem}; |
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| 92 |
if ($self->can('init')) { |
$log->logconfess("specify low-level file format module") unless ($self->{module}); |
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$log->debug("calling init"); |
my $module_path = $self->{module}; |
| 94 |
$self->init(@_); |
$module_path =~ s#::#/#g; |
| 95 |
} |
$module_path .= '.pm'; |
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$log->debug("require low-level module $self->{module} from $module_path"); |
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| 98 |
$self->{'code_page'} ||= 'ISO-8859-2'; |
require $module_path; |
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# running with low_mem flag? well, use DBM::Deep then. |
$self ? return $self : return undef; |
| 101 |
if ($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"; |
=head2 open |
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if (-e $db_file) { |
This function will read whole database in memory and produce lookups. |
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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; |
my $store; # simple in-memory hash |
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my $db = new DBM::Deep $db_file; |
$input->open( |
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path => '/path/to/database/file', |
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input_encoding => 'cp852', |
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strict_encoding => 0, |
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limit => 500, |
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offset => 6000, |
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stats => 1, |
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lookup_coderef => sub { |
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my $rec = shift; |
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# store lookups |
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}, |
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modify_records => { |
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900 => { '^a' => { ' : ' => '^b' } }, |
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901 => { '*' => { '^b' => ' ; ' } }, |
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}, |
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modify_file => 'conf/modify/mapping.map', |
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save_row => sub { |
| 126 |
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my $a = shift; |
| 127 |
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$store->{ $a->{id} } = $a->{row}; |
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}, |
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load_row => sub { |
| 130 |
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my $a = shift; |
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return defined($store->{ $a->{id} }) && |
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$store->{ $a->{id} }; |
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}, |
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$log->logdie("DBM::Deep error: $!") unless ($db); |
); |
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if ($db->error()) { |
By default, C<input_encoding> is assumed to be C<cp852>. |
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$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'} = $db; |
C<offset> is optional parametar to position at some offset before reading from database. |
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} |
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$self ? return $self : return undef; |
C<limit> is optional parametar to read just C<limit> records from database |
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} |
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=head2 open |
C<stats> create optional report about usage of fields and subfields |
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This function will read whole database in memory and produce lookups. |
C<lookup_coderef> is closure to called to save data into lookups |
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$isis->open( |
C<modify_records> specify mapping from subfields to delimiters or from |
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path => '/path/to/database/file', |
delimiters to subfields, as well as oprations on fields (if subfield is |
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code_page => '852', |
defined as C<*>. |
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limit_mfn => 500, |
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start_mfn => 6000, |
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lookup => $lookup_obj, |
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); |
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By default, C<code_page> is assumed to be C<852>. |
C<modify_file> is alternative for C<modify_records> above which preserves order and offers |
| 152 |
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(hopefully) simplier sintax than YAML or perl (see L</modify_file_regex>). This option |
| 153 |
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overrides C<modify_records> if both exists for same input. |
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If optional parametar C<start_mfn> is set, this will be first MFN to read |
C<save_row> and C<load_row> are low-level implementation of store engine. Calling convention |
| 156 |
from database (so you can skip beginning of your database if you need to). |
is documented in example above. |
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If optional parametar C<limit_mfn> is set, it will read just 500 records |
C<strict_encoding> should really default to 1, but it doesn't for now. |
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from database in example above. |
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Returns size of database, regardless of C<start_mfn> and C<limit_mfn> |
Returns size of database, regardless of C<offset> and C<limit> |
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parametars, see also C<$isis->size>. |
parametars, see also C<size>. |
| 162 |
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=cut |
=cut |
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| 167 |
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 ($arg->{lookup}); |
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$log->logconfess("lookup_coderef must be CODE, not ",ref($arg->{lookup_coderef})) |
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if ($arg->{lookup_coderef} && ref($arg->{lookup_coderef}) ne 'CODE'); |
| 177 |
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$log->debug( $arg->{lookup_coderef} ? '' : 'not ', "using lookup_coderef"); |
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| 180 |
$log->logcroak("need path") if (! $arg->{'path'}); |
$log->logcroak("need path") if (! $arg->{'path'}); |
| 181 |
my $code_page = $arg->{'code_page'} || '852'; |
my $input_encoding = $arg->{'input_encoding'} || $self->{'input_encoding'} || 'cp852'; |
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# store data in object |
# store data in object |
| 184 |
$self->{'code_page'} = $code_page; |
foreach my $v (qw/path offset limit/) { |
|
foreach my $v (qw/path start_mfn limit_mfn/) { |
|
| 185 |
$self->{$v} = $arg->{$v} if ($arg->{$v}); |
$self->{$v} = $arg->{$v} if ($arg->{$v}); |
| 186 |
} |
} |
| 187 |
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| 188 |
# create Text::Iconv object |
if ($arg->{load_row} || $arg->{save_row}) { |
| 189 |
$self->{iconv} = Text::Iconv->new($code_page,$self->{'code_page'}); |
$log->logconfess("save_row and load_row must be defined in pair and be CODE") unless ( |
| 190 |
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ref($arg->{load_row}) eq 'CODE' && |
| 191 |
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ref($arg->{save_row}) eq 'CODE' |
| 192 |
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); |
| 193 |
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$self->{load_row} = $arg->{load_row}; |
| 194 |
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$self->{save_row} = $arg->{save_row}; |
| 195 |
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$log->debug("using load_row and save_row instead of in-memory hash"); |
| 196 |
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} |
| 197 |
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| 198 |
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my $filter_ref; |
| 199 |
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my $recode_regex; |
| 200 |
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my $recode_map; |
| 201 |
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| 202 |
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if ($self->{recode}) { |
| 203 |
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my @r = split(/\s/, $self->{recode}); |
| 204 |
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if ($#r % 2 != 1) { |
| 205 |
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$log->logwarn("recode needs even number of elements (some number of valid pairs)"); |
| 206 |
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} else { |
| 207 |
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while (@r) { |
| 208 |
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my $from = shift @r; |
| 209 |
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my $to = shift @r; |
| 210 |
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$recode_map->{$from} = $to; |
| 211 |
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} |
| 212 |
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| 213 |
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$recode_regex = join '|' => keys %{ $recode_map }; |
| 214 |
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|
| 215 |
|
$log->debug("using recode regex: $recode_regex"); |
| 216 |
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} |
| 217 |
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| 218 |
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} |
| 219 |
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| 220 |
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my $rec_regex; |
| 221 |
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if (my $p = $arg->{modify_file}) { |
| 222 |
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$log->debug("using modify_file $p"); |
| 223 |
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$rec_regex = $self->modify_file_regexps( $p ); |
| 224 |
|
} elsif (my $h = $arg->{modify_records}) { |
| 225 |
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$log->debug("using modify_records ", sub { dump( $h ) }); |
| 226 |
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$rec_regex = $self->modify_record_regexps(%{ $h }); |
| 227 |
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} |
| 228 |
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$log->debug("rec_regex: ", sub { dump($rec_regex) }) if ($rec_regex); |
| 229 |
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| 230 |
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my $class = $self->{module} || $log->logconfess("can't get low-level module name!"); |
| 231 |
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| 232 |
my ($db, $size) = $self->open_db( |
my $ll_db = $class->new( |
| 233 |
path => $arg->{path}, |
path => $arg->{path}, |
| 234 |
|
input_config => $arg->{input_config} || $self->{input_config}, |
| 235 |
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# filter => sub { |
| 236 |
|
# my ($l,$f_nr) = @_; |
| 237 |
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# return unless defined($l); |
| 238 |
|
# $l = decode($input_encoding, $l); |
| 239 |
|
# $l =~ s/($recode_regex)/$recode_map->{$1}/g if ($recode_regex && $recode_map); |
| 240 |
|
# return $l; |
| 241 |
|
# }, |
| 242 |
|
%{ $arg }, |
| 243 |
); |
); |
| 244 |
|
|
| 245 |
unless ($db) { |
unless (defined($ll_db)) { |
| 246 |
$log->logwarn("can't open database $arg->{path}, skipping..."); |
$log->logwarn("can't open database $arg->{path}, skipping..."); |
| 247 |
return; |
return; |
| 248 |
} |
} |
| 249 |
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|
| 250 |
|
my $size = $ll_db->size; |
| 251 |
|
|
| 252 |
unless ($size) { |
unless ($size) { |
| 253 |
$log->logwarn("no records in database $arg->{path}, skipping..."); |
$log->logwarn("no records in database $arg->{path}, skipping..."); |
| 254 |
return; |
return; |
| 255 |
} |
} |
| 256 |
|
|
| 257 |
my $startmfn = 1; |
my $from_rec = 1; |
| 258 |
my $maxmfn = $size; |
my $to_rec = $size; |
| 259 |
|
|
| 260 |
if (my $s = $self->{start_mfn}) { |
if (my $s = $self->{offset}) { |
| 261 |
$log->info("skipping to MFN $s"); |
$log->debug("skipping to MFN $s"); |
| 262 |
$startmfn = $s; |
$from_rec = $s; |
| 263 |
} else { |
} else { |
| 264 |
$self->{start_mfn} = $startmfn; |
$self->{offset} = $from_rec; |
| 265 |
} |
} |
| 266 |
|
|
| 267 |
if ($self->{limit_mfn}) { |
if ($self->{limit}) { |
| 268 |
$log->info("limiting to ",$self->{limit_mfn}," records"); |
$log->debug("limiting to ",$self->{limit}," records"); |
| 269 |
$maxmfn = $startmfn + $self->{limit_mfn} - 1; |
$to_rec = $from_rec + $self->{limit} - 1; |
| 270 |
$maxmfn = $size if ($maxmfn > $size); |
$to_rec = $size if ($to_rec > $size); |
| 271 |
} |
} |
| 272 |
|
|
| 273 |
# store size for later |
# store size for later |
| 274 |
$self->{size} = ($maxmfn - $startmfn) ? ($maxmfn - $startmfn + 1) : 0; |
$self->{size} = ($to_rec - $from_rec) ? ($to_rec - $from_rec + 1) : 0; |
| 275 |
|
|
| 276 |
|
my $strict_encoding = $arg->{strict_encoding} || $self->{strict_encoding}; ## FIXME should be 1 really |
| 277 |
|
|
| 278 |
$log->info("processing $self->{size} records in $code_page, convert to $self->{code_page}"); |
$log->info("processing $self->{size}/$size records [$from_rec-$to_rec]", |
| 279 |
|
" encoding $input_encoding ", $strict_encoding ? ' [strict]' : '', |
| 280 |
|
$self->{stats} ? ' [stats]' : '', |
| 281 |
|
); |
| 282 |
|
|
| 283 |
# read database |
# read database |
| 284 |
for (my $mfn = $startmfn; $mfn <= $maxmfn; $mfn++) { |
for (my $pos = $from_rec; $pos <= $to_rec; $pos++) { |
| 285 |
|
|
| 286 |
|
$log->debug("position: $pos\n"); |
| 287 |
|
|
| 288 |
$log->debug("mfn: $mfn\n"); |
my $rec = $ll_db->fetch_rec($pos, sub { |
| 289 |
|
my ($l,$f_nr,$debug) = @_; |
| 290 |
|
# return unless defined($l); |
| 291 |
|
# return $l unless ($rec_regex && $f_nr); |
| 292 |
|
|
| 293 |
|
return unless ( defined($l) && defined($f_nr) ); |
| 294 |
|
|
| 295 |
|
warn "-=> $f_nr ## |$l|\n" if ($debug); |
| 296 |
|
$log->debug("-=> $f_nr ## $l"); |
| 297 |
|
|
| 298 |
|
# codepage conversion and recode_regex |
| 299 |
|
$l = decode($input_encoding, $l, 1); |
| 300 |
|
$l =~ s/($recode_regex)/$recode_map->{$1}/g if ($recode_regex && $recode_map); |
| 301 |
|
|
| 302 |
|
# apply regexps |
| 303 |
|
if ($rec_regex && defined($rec_regex->{$f_nr})) { |
| 304 |
|
$log->logconfess("regexps->{$f_nr} must be ARRAY") if (ref($rec_regex->{$f_nr}) ne 'ARRAY'); |
| 305 |
|
my $c = 0; |
| 306 |
|
foreach my $r (@{ $rec_regex->{$f_nr} }) { |
| 307 |
|
my $old_l = $l; |
| 308 |
|
$log->logconfess("expected regex in ", dump( $r )) unless defined($r->{regex}); |
| 309 |
|
eval '$l =~ ' . $r->{regex}; |
| 310 |
|
if ($old_l ne $l) { |
| 311 |
|
my $d = "|$old_l| -> |$l| "; # . $r->{regex}; |
| 312 |
|
$d .= ' +' . $r->{line} . ' ' . $r->{file} if defined($r->{line}); |
| 313 |
|
$d .= ' ' . $r->{debug} if defined($r->{debug}); |
| 314 |
|
$log->debug("MODIFY $d"); |
| 315 |
|
warn "*** $d\n" if ($debug); |
| 316 |
|
|
| 317 |
|
} |
| 318 |
|
$log->error("error applying regex: ",dump($r)) if ($@); |
| 319 |
|
} |
| 320 |
|
} |
| 321 |
|
|
| 322 |
|
$log->debug("<=- $f_nr ## |$l|"); |
| 323 |
|
warn "<=- $f_nr ## $l\n" if ($debug); |
| 324 |
|
return $l; |
| 325 |
|
}); |
| 326 |
|
|
| 327 |
my $rec = $self->fetch_rec( $db, $mfn ); |
$log->debug(sub { dump($rec) }); |
| 328 |
|
|
| 329 |
if (! $rec) { |
if (! $rec) { |
| 330 |
$log->warn("record $mfn empty? skipping..."); |
$log->warn("record $pos empty? skipping..."); |
| 331 |
next; |
next; |
| 332 |
} |
} |
| 333 |
|
|
| 334 |
# store |
# store |
| 335 |
if ($self->{'low_mem'}) { |
if ($self->{save_row}) { |
| 336 |
$self->{'db'}->put($mfn, $rec); |
$self->{save_row}->({ |
| 337 |
|
id => $pos, |
| 338 |
|
row => $rec, |
| 339 |
|
}); |
| 340 |
} else { |
} else { |
| 341 |
$self->{'data'}->{$mfn} = $rec; |
$self->{data}->{$pos} = $rec; |
| 342 |
} |
} |
| 343 |
|
|
| 344 |
# create lookup |
# create lookup |
| 345 |
$self->{'lookup'}->add( $rec ) if ($rec && $self->{'lookup'}); |
$arg->{'lookup_coderef'}->( $rec ) if ($rec && $arg->{'lookup_coderef'}); |
| 346 |
|
|
| 347 |
$self->progress_bar($mfn,$maxmfn); |
# update counters for statistics |
| 348 |
|
if ($self->{stats}) { |
| 349 |
|
|
| 350 |
} |
# fetch clean record with regexpes applied for statistics |
| 351 |
|
my $rec = $ll_db->fetch_rec($pos); |
| 352 |
|
|
| 353 |
|
foreach my $fld (keys %{ $rec }) { |
| 354 |
|
$self->{_stats}->{fld}->{ $fld }++; |
| 355 |
|
|
| 356 |
|
#$log->logdie("invalid record fild $fld, not ARRAY") |
| 357 |
|
next unless (ref($rec->{ $fld }) eq 'ARRAY'); |
| 358 |
|
|
| 359 |
|
foreach my $row (@{ $rec->{$fld} }) { |
| 360 |
|
|
| 361 |
|
if (ref($row) eq 'HASH') { |
| 362 |
|
|
| 363 |
|
foreach my $sf (keys %{ $row }) { |
| 364 |
|
next if ($sf eq 'subfields'); |
| 365 |
|
$self->{_stats}->{sf}->{ $fld }->{ $sf }->{count}++; |
| 366 |
|
$self->{_stats}->{sf}->{ $fld }->{ $sf }->{repeatable}++ |
| 367 |
|
if (ref($row->{$sf}) eq 'ARRAY'); |
| 368 |
|
} |
| 369 |
|
|
| 370 |
|
} else { |
| 371 |
|
$self->{_stats}->{repeatable}->{ $fld }++; |
| 372 |
|
} |
| 373 |
|
} |
| 374 |
|
} |
| 375 |
|
} |
| 376 |
|
|
| 377 |
|
$self->progress_bar($pos,$to_rec) unless ($self->{no_progress_bar}); |
| 378 |
|
|
| 379 |
$self->{'current_mfn'} = -1; |
} |
|
$self->{'last_pcnt'} = 0; |
|
| 380 |
|
|
| 381 |
$log->debug("max mfn: $maxmfn"); |
$self->{pos} = -1; |
| 382 |
|
$self->{last_pcnt} = 0; |
| 383 |
|
|
| 384 |
# store max mfn and return it. |
# store max mfn and return it. |
| 385 |
$self->{'max_mfn'} = $maxmfn; |
$self->{max_pos} = $to_rec; |
| 386 |
|
$log->debug("max_pos: $to_rec"); |
| 387 |
|
|
| 388 |
|
# save for dump |
| 389 |
|
$self->{ll_db} = $ll_db; |
| 390 |
|
|
| 391 |
return $size; |
return $size; |
| 392 |
} |
} |
| 407 |
|
|
| 408 |
my $log = $self->_get_logger(); |
my $log = $self->_get_logger(); |
| 409 |
|
|
| 410 |
$log->logconfess("it seems that you didn't load database!") unless ($self->{'current_mfn'}); |
$log->logconfess("it seems that you didn't load database!") unless ($self->{pos}); |
| 411 |
|
|
| 412 |
if ($self->{'current_mfn'} == -1) { |
if ($self->{pos} == -1) { |
| 413 |
$self->{'current_mfn'} = $self->{'start_mfn'}; |
$self->{pos} = $self->{offset}; |
| 414 |
} else { |
} else { |
| 415 |
$self->{'current_mfn'}++; |
$self->{pos}++; |
| 416 |
} |
} |
| 417 |
|
|
| 418 |
my $mfn = $self->{'current_mfn'}; |
my $mfn = $self->{pos}; |
| 419 |
|
|
| 420 |
if ($mfn > $self->{'max_mfn'}) { |
if ($mfn > $self->{max_pos}) { |
| 421 |
$self->{'current_mfn'} = $self->{'max_mfn'}; |
$self->{pos} = $self->{max_pos}; |
| 422 |
$log->debug("at EOF"); |
$log->debug("at EOF"); |
| 423 |
return; |
return; |
| 424 |
} |
} |
| 425 |
|
|
| 426 |
$self->progress_bar($mfn,$self->{'max_mfn'}); |
$self->progress_bar($mfn,$self->{max_pos}) unless ($self->{no_progress_bar}); |
| 427 |
|
|
| 428 |
my $rec; |
my $rec; |
| 429 |
|
|
| 430 |
if ($self->{'low_mem'}) { |
if ($self->{load_row}) { |
| 431 |
$rec = $self->{'db'}->get($mfn); |
$rec = $self->{load_row}->({ id => $mfn }); |
| 432 |
} else { |
} else { |
| 433 |
$rec = $self->{'data'}->{$mfn}; |
$rec = $self->{data}->{$mfn}; |
| 434 |
} |
} |
| 435 |
|
|
| 436 |
$rec ||= 0E0; |
$rec ||= 0E0; |
| 448 |
|
|
| 449 |
sub pos { |
sub pos { |
| 450 |
my $self = shift; |
my $self = shift; |
| 451 |
return $self->{'current_mfn'}; |
return $self->{pos}; |
| 452 |
} |
} |
| 453 |
|
|
| 454 |
|
|
| 462 |
|
|
| 463 |
foreach my $mfn ( 1 ... $isis->size ) { ... } |
foreach my $mfn ( 1 ... $isis->size ) { ... } |
| 464 |
|
|
| 465 |
because it takes into account C<start_mfn> and C<limit_mfn>. |
because it takes into account C<offset> and C<limit>. |
| 466 |
|
|
| 467 |
=cut |
=cut |
| 468 |
|
|
| 469 |
sub size { |
sub size { |
| 470 |
my $self = shift; |
my $self = shift; |
| 471 |
return $self->{'size'}; |
return $self->{size}; |
| 472 |
} |
} |
| 473 |
|
|
| 474 |
=head2 seek |
=head2 seek |
| 483 |
|
|
| 484 |
sub seek { |
sub seek { |
| 485 |
my $self = shift; |
my $self = shift; |
| 486 |
my $pos = shift || return; |
my $pos = shift; |
| 487 |
|
|
| 488 |
my $log = $self->_get_logger(); |
my $log = $self->_get_logger(); |
| 489 |
|
|
| 490 |
|
$log->logconfess("called without pos") unless defined($pos); |
| 491 |
|
|
| 492 |
if ($pos < 1) { |
if ($pos < 1) { |
| 493 |
$log->warn("seek before first record"); |
$log->warn("seek before first record"); |
| 494 |
$pos = 1; |
$pos = 1; |
| 495 |
} elsif ($pos > $self->{'max_mfn'}) { |
} elsif ($pos > $self->{max_pos}) { |
| 496 |
$log->warn("seek beyond last record"); |
$log->warn("seek beyond last record"); |
| 497 |
$pos = $self->{'max_mfn'}; |
$pos = $self->{max_pos}; |
| 498 |
|
} |
| 499 |
|
|
| 500 |
|
return $self->{pos} = (($pos - 1) || -1); |
| 501 |
|
} |
| 502 |
|
|
| 503 |
|
=head2 stats |
| 504 |
|
|
| 505 |
|
Dump statistics about field and subfield usage |
| 506 |
|
|
| 507 |
|
print $input->stats; |
| 508 |
|
|
| 509 |
|
=cut |
| 510 |
|
|
| 511 |
|
sub stats { |
| 512 |
|
my $self = shift; |
| 513 |
|
|
| 514 |
|
my $log = $self->_get_logger(); |
| 515 |
|
|
| 516 |
|
my $s = $self->{_stats}; |
| 517 |
|
if (! $s) { |
| 518 |
|
$log->warn("called stats, but there is no statistics collected"); |
| 519 |
|
return; |
| 520 |
|
} |
| 521 |
|
|
| 522 |
|
my $max_fld = 0; |
| 523 |
|
|
| 524 |
|
my $out = join("\n", |
| 525 |
|
map { |
| 526 |
|
my $f = $_; |
| 527 |
|
die "no field in ", dump( $s->{fld} ) unless defined( $f ); |
| 528 |
|
my $v = $s->{fld}->{$f} || die "no s->{fld}->{$f}"; |
| 529 |
|
$max_fld = $v if ($v > $max_fld); |
| 530 |
|
|
| 531 |
|
my $o = sprintf("%4s %d ~", $f, $v); |
| 532 |
|
|
| 533 |
|
if (defined($s->{sf}->{$f})) { |
| 534 |
|
my @subfields = keys %{ $s->{sf}->{$f} }; |
| 535 |
|
map { |
| 536 |
|
$o .= sprintf(" %s:%d%s", $_, |
| 537 |
|
$s->{sf}->{$f}->{$_}->{count}, |
| 538 |
|
$s->{sf}->{$f}->{$_}->{repeatable} ? '*' : '', |
| 539 |
|
); |
| 540 |
|
} ( |
| 541 |
|
# first indicators and other special subfields |
| 542 |
|
sort( grep { length($_) > 1 } @subfields ), |
| 543 |
|
# then subfileds (single char) |
| 544 |
|
sort( grep { length($_) == 1 } @subfields ), |
| 545 |
|
); |
| 546 |
|
} |
| 547 |
|
|
| 548 |
|
if (my $v_r = $s->{repeatable}->{$f}) { |
| 549 |
|
$o .= " ($v_r)" if ($v_r != $v); |
| 550 |
|
} |
| 551 |
|
|
| 552 |
|
$o; |
| 553 |
|
} sort { |
| 554 |
|
if ( $a =~ m/^\d+$/ && $b =~ m/^\d+$/ ) { |
| 555 |
|
$a <=> $b |
| 556 |
|
} else { |
| 557 |
|
$a cmp $b |
| 558 |
|
} |
| 559 |
|
} keys %{ $s->{fld} } |
| 560 |
|
); |
| 561 |
|
|
| 562 |
|
$log->debug( sub { dump($s) } ); |
| 563 |
|
|
| 564 |
|
return $out; |
| 565 |
|
} |
| 566 |
|
|
| 567 |
|
=head2 dump_ascii |
| 568 |
|
|
| 569 |
|
Display humanly readable dump of record |
| 570 |
|
|
| 571 |
|
=cut |
| 572 |
|
|
| 573 |
|
sub dump_ascii { |
| 574 |
|
my $self = shift; |
| 575 |
|
|
| 576 |
|
return unless $self->{ll_db}; |
| 577 |
|
|
| 578 |
|
if ($self->{ll_db}->can('dump_ascii')) { |
| 579 |
|
return $self->{ll_db}->dump_ascii( $self->{pos} ); |
| 580 |
|
} else { |
| 581 |
|
return dump( $self->{ll_db}->fetch_rec( $self->{pos} ) ); |
| 582 |
|
} |
| 583 |
|
} |
| 584 |
|
|
| 585 |
|
=head2 _get_regex |
| 586 |
|
|
| 587 |
|
Helper function called which create regexps to be execute on code. |
| 588 |
|
|
| 589 |
|
_get_regex( 900, 'regex:[0-9]+' ,'numbers' ); |
| 590 |
|
_get_regex( 900, '^b', ' : ^b' ); |
| 591 |
|
|
| 592 |
|
It supports perl regexps with C<regex:> prefix to from value and has |
| 593 |
|
additional logic to skip empty subfields. |
| 594 |
|
|
| 595 |
|
=cut |
| 596 |
|
|
| 597 |
|
sub _get_regex { |
| 598 |
|
my ($sf,$from,$to) = @_; |
| 599 |
|
|
| 600 |
|
# protect / |
| 601 |
|
$from =~ s!/!\\/!gs; |
| 602 |
|
$to =~ s!/!\\/!gs; |
| 603 |
|
|
| 604 |
|
if ($from =~ m/^regex:(.+)$/) { |
| 605 |
|
$from = $1; |
| 606 |
|
} else { |
| 607 |
|
$from = '\Q' . $from . '\E'; |
| 608 |
|
} |
| 609 |
|
if ($sf =~ /^\^/) { |
| 610 |
|
my $need_subfield_data = '*'; # no |
| 611 |
|
# if from is also subfield, require some data in between |
| 612 |
|
# to correctly skip empty subfields |
| 613 |
|
$need_subfield_data = '+' if ($from =~ m/^\\Q\^/); |
| 614 |
|
return |
| 615 |
|
's/\Q'. $sf .'\E([^\^]' . $need_subfield_data . '?)'. $from .'([^\^]*?)/'. $sf .'$1'. $to .'$2/'; |
| 616 |
|
} else { |
| 617 |
|
return |
| 618 |
|
's/'. $from .'/'. $to .'/g'; |
| 619 |
|
} |
| 620 |
|
} |
| 621 |
|
|
| 622 |
|
|
| 623 |
|
=head2 modify_record_regexps |
| 624 |
|
|
| 625 |
|
Generate hash with regexpes to be applied using L<filter>. |
| 626 |
|
|
| 627 |
|
my $regexpes = $input->modify_record_regexps( |
| 628 |
|
900 => { '^a' => { ' : ' => '^b' } }, |
| 629 |
|
901 => { '*' => { '^b' => ' ; ' } }, |
| 630 |
|
); |
| 631 |
|
|
| 632 |
|
=cut |
| 633 |
|
|
| 634 |
|
sub modify_record_regexps { |
| 635 |
|
my $self = shift; |
| 636 |
|
my $modify_record = {@_}; |
| 637 |
|
|
| 638 |
|
my $regexpes; |
| 639 |
|
|
| 640 |
|
my $log = $self->_get_logger(); |
| 641 |
|
|
| 642 |
|
foreach my $f (keys %$modify_record) { |
| 643 |
|
$log->debug("field: $f"); |
| 644 |
|
|
| 645 |
|
foreach my $sf (keys %{ $modify_record->{$f} }) { |
| 646 |
|
$log->debug("subfield: $sf"); |
| 647 |
|
|
| 648 |
|
foreach my $from (keys %{ $modify_record->{$f}->{$sf} }) { |
| 649 |
|
my $to = $modify_record->{$f}->{$sf}->{$from}; |
| 650 |
|
#die "no field?" unless defined($to); |
| 651 |
|
my $d = "|$from| -> |$to|"; |
| 652 |
|
$log->debug("transform: $d"); |
| 653 |
|
|
| 654 |
|
my $regex = _get_regex($sf,$from,$to); |
| 655 |
|
push @{ $regexpes->{$f} }, { regex => $regex, debug => $d }; |
| 656 |
|
$log->debug("regex: $regex"); |
| 657 |
|
} |
| 658 |
|
} |
| 659 |
} |
} |
| 660 |
|
|
| 661 |
return $self->{'current_mfn'} = (($pos - 1) || -1); |
return $regexpes; |
| 662 |
} |
} |
| 663 |
|
|
| 664 |
|
=head2 modify_file_regexps |
| 665 |
|
|
| 666 |
|
Generate hash with regexpes to be applied using L<filter> from |
| 667 |
|
pseudo hash/yaml format for regex mappings. |
| 668 |
|
|
| 669 |
=head1 MEMORY USAGE |
It should be obvious: |
| 670 |
|
|
| 671 |
C<low_mem> options is double-edged sword. If enabled, WebPAC |
200 |
| 672 |
will run on memory constraint machines (which doesn't have enough |
'^a' |
| 673 |
physical RAM to create memory structure for whole source database). |
' : ' => '^e' |
| 674 |
|
' = ' => '^d' |
| 675 |
|
|
| 676 |
If your machine has 512Mb or more of RAM and database is around 10000 records, |
In field I<200> find C<'^a'> and then C<' : '>, and replace it with C<'^e'>. |
| 677 |
memory shouldn't be an issue. If you don't have enough physical RAM, you |
In field I<200> find C<'^a'> and then C<' = '>, and replace it with C<'^d'>. |
|
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). |
|
| 678 |
|
|
| 679 |
Hitting swap at end of reading source database is probably o.k. However, |
my $regexpes = $input->modify_file_regexps( 'conf/modify/common.pl' ); |
|
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. |
|
| 680 |
|
|
| 681 |
Parsed structures are essential - you just have option to trade RAM memory |
On undef path it will just return. |
|
(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>. |
|
| 682 |
|
|
| 683 |
However, when WebPAC is running on desktop machines (or laptops :-), it's |
=cut |
| 684 |
highly undesireable for system to start swapping. Using C<low_mem> option can |
|
| 685 |
reduce WecPAC memory usage to around 64Mb for same database with lookup |
sub modify_file_regexps { |
| 686 |
fields and sorted indexes which stay in RAM. Performance will suffer, but |
my $self = shift; |
| 687 |
memory usage will really be minimal. It might be also more confortable to |
|
| 688 |
run WebPAC reniced on those machines. |
my $modify_path = shift || return; |
| 689 |
|
|
| 690 |
|
my $log = $self->_get_logger(); |
| 691 |
|
|
| 692 |
|
my $regexpes; |
| 693 |
|
|
| 694 |
|
CORE::open(my $fh, $modify_path) || $log->logdie("can't open modify file $modify_path: $!"); |
| 695 |
|
|
| 696 |
|
my ($f,$sf); |
| 697 |
|
|
| 698 |
|
while(<$fh>) { |
| 699 |
|
chomp; |
| 700 |
|
next if (/^#/ || /^\s*$/); |
| 701 |
|
|
| 702 |
|
if (/^\s*(\d+)\s*$/) { |
| 703 |
|
$f = $1; |
| 704 |
|
$log->debug("field: $f"); |
| 705 |
|
next; |
| 706 |
|
} elsif (/^\s*'([^']*)'\s*$/) { |
| 707 |
|
$sf = $1; |
| 708 |
|
$log->die("can't define subfiled before field in: $_") unless ($f); |
| 709 |
|
$log->debug("subfield: $sf"); |
| 710 |
|
} elsif (/^\s*'([^']*)'\s*=>\s*'([^']*)'\s*$/) { |
| 711 |
|
my ($from,$to) = ($1, $2); |
| 712 |
|
|
| 713 |
|
$log->debug("transform: |$from| -> |$to|"); |
| 714 |
|
|
| 715 |
|
my $regex = _get_regex($sf,$from,$to); |
| 716 |
|
push @{ $regexpes->{$f} }, { |
| 717 |
|
regex => $regex, |
| 718 |
|
file => $modify_path, |
| 719 |
|
line => $., |
| 720 |
|
}; |
| 721 |
|
$log->debug("regex: $regex"); |
| 722 |
|
} else { |
| 723 |
|
die "can't parse: $_"; |
| 724 |
|
} |
| 725 |
|
} |
| 726 |
|
|
| 727 |
|
return $regexpes; |
| 728 |
|
} |
| 729 |
|
|
| 730 |
=head1 AUTHOR |
=head1 AUTHOR |
| 731 |
|
|
| 733 |
|
|
| 734 |
=head1 COPYRIGHT & LICENSE |
=head1 COPYRIGHT & LICENSE |
| 735 |
|
|
| 736 |
Copyright 2005 Dobrica Pavlinusic, All Rights Reserved. |
Copyright 2005-2006 Dobrica Pavlinusic, All Rights Reserved. |
| 737 |
|
|
| 738 |
This program is free software; you can redistribute it and/or modify it |
This program is free software; you can redistribute it and/or modify it |
| 739 |
under the same terms as Perl itself. |
under the same terms as Perl itself. |
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Patch