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package WebPAC; |
package WebPAC; |
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use warnings; |
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use strict; |
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use Carp; |
use Carp; |
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use Text::Iconv; |
use Text::Iconv; |
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use Config::IniFiles; |
use Config::IniFiles; |
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use XML::Simple; |
use XML::Simple; |
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use Template; |
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use Log::Log4perl qw(get_logger :levels); |
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use Time::HiRes qw(time); |
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use Data::Dumper; |
use Data::Dumper; |
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#my $LOOKUP_REGEX = '\[[^\[\]]+\]'; |
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#my $LOOKUP_REGEX_SAVE = '\[([^\[\]]+)\]'; |
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my $LOOKUP_REGEX = 'lookup{[^\{\}]+}'; |
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my $LOOKUP_REGEX_SAVE = 'lookup{([^\{\}]+)}'; |
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=head1 NAME |
=head1 NAME |
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WebPAC - base class for WebPAC |
WebPAC - base class for WebPAC |
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=head2 new |
=head2 new |
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This will create new instance of WebPAC using configuration specified by C<config_file>. |
Create new instance of WebPAC using configuration specified by C<config_file>. |
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my $webpac = new WebPAC( |
my $webpac = new WebPAC( |
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config_file => 'name.conf', |
config_file => 'name.conf', |
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[code_page => 'ISO-8859-2',] |
code_page => 'ISO-8859-2', |
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low_mem => 1, |
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filter => { |
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'lower' => sub { lc($_[0]) }, |
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}, |
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); |
); |
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Default C<code_page> is C<ISO-8859-2>. |
Default C<code_page> is C<ISO-8859-2>. |
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It will also read configuration files |
Default is not to use C<low_mem> options (see L<MEMORY USAGE> below). |
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There is optinal parametar C<filter> which specify different filters which |
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can be applied using C<filter{name}> notation. |
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This method will also read configuration files |
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C<global.conf> (used by indexer and Web font-end) |
C<global.conf> (used by indexer and Web font-end) |
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and configuration file specified by C<config_file> |
and configuration file specified by C<config_file> |
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which describes databases to be indexed. |
which describes databases to be indexed. |
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my $self = {@_}; |
my $self = {@_}; |
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bless($self, $class); |
bless($self, $class); |
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$self->{'start_t'} = time(); |
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my $log_file = $self->{'log'} || "log.conf"; |
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Log::Log4perl->init($log_file); |
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my $log = $self->_get_logger(); |
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# fill in default values |
# fill in default values |
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# output codepage |
# output codepage |
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$self->{'code_page'} = 'ISO-8859-2' if (! $self->{'code_page'}); |
$self->{'code_page'} = 'ISO-8859-2' if (! $self->{'code_page'}); |
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# |
# |
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# read global.conf |
# read global.conf |
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# |
# |
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$log->debug("read 'global.conf'"); |
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$self->{global_config_file} = new Config::IniFiles( -file => 'global.conf' ) || croak "can't open 'global.conf'"; |
my $config = new Config::IniFiles( -file => 'global.conf' ) || $log->logcroak("can't open 'global.conf'"); |
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# read global config parametars |
# read global config parametars |
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foreach my $var (qw( |
foreach my $var (qw( |
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dbi_passwd |
dbi_passwd |
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show_progress |
show_progress |
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my_unac_filter |
my_unac_filter |
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output_template |
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)) { |
)) { |
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$self->{global_config}->{$var} = $self->{global_config_file}->val('global', $var); |
$self->{'global_config'}->{$var} = $config->val('global', $var); |
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} |
} |
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# |
# |
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# read indexer config file |
# read indexer config file |
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# |
# |
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$self->{indexer_config_file} = new Config::IniFiles( -file => $self->{config_file} ) || croak "can't open '$self->{config_file}'"; |
$self->{indexer_config_file} = new Config::IniFiles( -file => $self->{config_file} ) || $log->logcroak("can't open '",$self->{config_file},"'"); |
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# create UTF-8 convertor for import_xml files |
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$self->{'utf2cp'} = Text::Iconv->new('UTF-8' ,$self->{'code_page'}); |
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# create Template toolkit instance |
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$self->{'tt'} = Template->new( |
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INCLUDE_PATH => ($self->{'global_config_file'}->{'output_template'} || './output_template'), |
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# FILTERS => { |
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# 'foo' => \&foo_filter, |
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# }, |
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EVAL_PERL => 1, |
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); |
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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'} = $db; |
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} |
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$log->debug("filters defined: ",Dumper($self->{'filter'})); |
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return $self; |
return $self; |
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} |
} |
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$webpac->open_isis( |
$webpac->open_isis( |
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filename => '/data/ISIS/ISIS', |
filename => '/data/ISIS/ISIS', |
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code_page => '852', |
code_page => '852', |
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limit_mfn => '500', |
limit_mfn => 500, |
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start_mfn => 6000, |
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lookup => [ ... ], |
lookup => [ ... ], |
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); |
); |
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By default, ISIS code page is assumed to be C<852>. |
By default, ISIS code page is assumed to be C<852>. |
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If optional parametar C<start_mfn> is set, this will be first MFN to read |
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from database (so you can skip beginning of your database if you need to). |
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If optional parametar C<limit_mfn> is set, it will read just 500 records |
If optional parametar C<limit_mfn> is set, it will read just 500 records |
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from database in example above. |
from database in example above. |
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Returns number of last record read into memory (size of database, really). |
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C<lookup> argument is an array of lookups to create. Each lookup must have C<key> and |
C<lookup> argument is an array of lookups to create. Each lookup must have C<key> and |
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C<val>. Optional parametar C<eval> is perl code to evaluate before storing |
C<val>. Optional parametar C<eval> is perl code to evaluate before storing |
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value in index. |
value in index. |
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'val' => 'v900' }, |
'val' => 'v900' }, |
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] |
] |
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Returns number of last record read into memory (size of database, really). |
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=cut |
=cut |
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sub open_isis { |
sub open_isis { |
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my $self = shift; |
my $self = shift; |
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my $arg = {@_}; |
my $arg = {@_}; |
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croak "need filename" if (! $arg->{'filename'}); |
my $log = $self->_get_logger(); |
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$log->logcroak("need filename") if (! $arg->{'filename'}); |
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my $code_page = $arg->{'code_page'} || '852'; |
my $code_page = $arg->{'code_page'} || '852'; |
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$log->logdie("can't find database ",$arg->{'filename'}) unless (glob($arg->{'filename'}.'.*')); |
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# store data in object |
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$self->{'isis_filename'} = $arg->{'filename'}; |
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$self->{'isis_code_page'} = $code_page; |
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use OpenIsis; |
use OpenIsis; |
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#$self->{'isis_code_page'} = $code_page; |
#$self->{'isis_code_page'} = $code_page; |
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# create Text::Iconv object |
# create Text::Iconv object |
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my $cp = Text::Iconv->new($code_page,$self->{'code_page'}); |
my $cp = Text::Iconv->new($code_page,$self->{'code_page'}); |
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print STDERR "reading ISIS database '",$arg->{'filename'},"'\n" if ($self->{'debug'}); |
$log->info("reading ISIS database '",$arg->{'filename'},"'"); |
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$log->debug("isis code page: $code_page"); |
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my $isis_db = OpenIsis::open($arg->{'filename'}); |
my $isis_db = OpenIsis::open($arg->{'filename'}); |
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my $maxmfn = OpenIsis::maxRowid( $isis_db ) || 1; |
my $maxmfn = OpenIsis::maxRowid( $isis_db ) || 1; |
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my $startmfn = 1; |
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if (my $s = $self->{'start_mfn'}) { |
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$log->info("skipping to MFN $s"); |
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$startmfn = $s; |
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} else { |
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$self->{'start_mfn'} = $startmfn; |
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} |
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$maxmfn = $self->{limit_mfn} if ($self->{limit_mfn}); |
$maxmfn = $startmfn + $self->{limit_mfn} if ($self->{limit_mfn}); |
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print STDERR "processing $maxmfn records...\n" if ($self->{'debug'}); |
$log->info("processing ",($maxmfn-$startmfn)." records..."); |
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# read database |
# read database |
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for (my $mfn = 1; $mfn <= $maxmfn; $mfn++) { |
for (my $mfn = $startmfn; $mfn <= $maxmfn; $mfn++) { |
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$log->debug("mfn: $mfn\n"); |
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my $rec; |
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# read record |
# read record |
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my $row = OpenIsis::read( $isis_db, $mfn ); |
my $row = OpenIsis::read( $isis_db, $mfn ); |
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$val = $l; |
$val = $l; |
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} |
} |
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push @{$self->{'data'}->{$mfn}->{$k}}, $val; |
push @{$rec->{$k}}, $val; |
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} |
} |
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} else { |
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push @{$rec->{'000'}}, $mfn; |
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} |
} |
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} |
} |
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$log->confess("record $mfn empty?") unless ($rec); |
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# store |
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if ($self->{'low_mem'}) { |
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$self->{'db'}->put($mfn, $rec); |
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} else { |
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$self->{'data'}->{$mfn} = $rec; |
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} |
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# create lookup |
# create lookup |
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my $rec = $self->{'data'}->{$mfn}; |
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$self->create_lookup($rec, @{$arg->{'lookup'}}); |
$self->create_lookup($rec, @{$arg->{'lookup'}}); |
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$self->progress_bar($mfn,$maxmfn); |
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} |
} |
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$self->{'current_mfn'} = 1; |
$self->{'current_mfn'} = -1; |
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$self->{'last_pcnt'} = 0; |
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$log->debug("max mfn: $maxmfn"); |
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# store max mfn and return it. |
# store max mfn and return it. |
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return $self->{'max_mfn'} = $maxmfn; |
return $self->{'max_mfn'} = $maxmfn; |
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sub fetch_rec { |
sub fetch_rec { |
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my $self = shift; |
my $self = shift; |
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my $mfn = $self->{'current_mfn'}++ || confess "it seems that you didn't load database!"; |
my $log = $self->_get_logger(); |
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$log->logconfess("it seems that you didn't load database!") unless ($self->{'current_mfn'}); |
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if ($self->{'current_mfn'} == -1) { |
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$self->{'current_mfn'} = $self->{'start_mfn'}; |
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} else { |
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$self->{'current_mfn'}++; |
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} |
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my $mfn = $self->{'current_mfn'}; |
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if ($mfn > $self->{'max_mfn'}) { |
if ($mfn > $self->{'max_mfn'}) { |
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$self->{'current_mfn'} = $self->{'max_mfn'}; |
$self->{'current_mfn'} = $self->{'max_mfn'}; |
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$log->debug("at EOF"); |
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return; |
return; |
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} |
} |
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return $self->{'data'}->{$mfn}; |
$self->progress_bar($mfn,$self->{'max_mfn'}); |
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if ($self->{'low_mem'}) { |
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return $self->{'db'}->get($mfn); |
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} else { |
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return $self->{'data'}->{$mfn}; |
322 |
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} |
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} |
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=head2 mfn |
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Returns current record number (MFN). |
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print $webpac->mfn; |
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=cut |
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sub mfn { |
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my $self = shift; |
335 |
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return $self->{'current_mfn'}; |
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} |
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=head2 progress_bar |
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Draw progress bar on STDERR. |
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$webpac->progress_bar($current, $max); |
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=cut |
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sub progress_bar { |
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my $self = shift; |
348 |
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my ($curr,$max) = @_; |
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my $log = $self->_get_logger(); |
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$log->logconfess("no current value!") if (! $curr); |
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$log->logconfess("no maximum value!") if (! $max); |
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if ($curr > $max) { |
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$max = $curr; |
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$log->debug("overflow to $curr"); |
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} |
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$self->{'last_pcnt'} ||= 1; |
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my $p = int($curr * 100 / $max) || 1; |
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# reset on re-run |
366 |
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if ($p < $self->{'last_pcnt'}) { |
367 |
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$self->{'last_pcnt'} = $p; |
368 |
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$self->{'last_t'} = time(); |
369 |
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$self->{'last_curr'} = undef; |
370 |
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} |
371 |
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$self->{'last_t'} ||= time(); |
373 |
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374 |
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if ($p != $self->{'last_pcnt'}) { |
375 |
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376 |
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my $last_curr = $self->{'last_curr'} || $curr; |
377 |
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my $t = time(); |
378 |
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my $rate = ($curr - $last_curr) / (($t - $self->{'last_t'} || 1)); |
379 |
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my $eta = ($max-$curr) / ($rate || 1); |
380 |
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printf STDERR ("%5d [%-38s] %-5d %0.1f/s %s\r",$curr,"=" x ($p/3)."$p%>", $max, $rate, $self->fmt_time($eta)); |
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$self->{'last_pcnt'} = $p; |
382 |
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$self->{'last_t'} = time(); |
383 |
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$self->{'last_curr'} = $curr; |
384 |
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} |
385 |
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print STDERR "\n" if ($p == 100); |
386 |
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} |
387 |
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=head2 fmt_time |
389 |
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Format time (in seconds) for display. |
391 |
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print $webpac->fmt_time(time()); |
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This method is called by L<progress_bar> to display remaining time. |
395 |
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396 |
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=cut |
397 |
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398 |
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sub fmt_time { |
399 |
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my $self = shift; |
400 |
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401 |
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my $t = shift || 0; |
402 |
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my $out = ""; |
403 |
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404 |
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my ($ss,$mm,$hh) = gmtime($t); |
405 |
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$out .= "${hh}h" if ($hh); |
406 |
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$out .= sprintf("%02d:%02d", $mm,$ss); |
407 |
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$out .= " " if ($hh == 0); |
408 |
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return $out; |
409 |
} |
} |
410 |
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|
411 |
=head2 open_import_xml |
=head2 open_import_xml |
419 |
sub open_import_xml { |
sub open_import_xml { |
420 |
my $self = shift; |
my $self = shift; |
421 |
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422 |
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my $log = $self->_get_logger(); |
423 |
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|
424 |
my $arg = {@_}; |
my $arg = {@_}; |
425 |
confess "need type to load file from import_xml/" if (! $arg->{'type'}); |
$log->logconfess("need type to load file from import_xml/") if (! $arg->{'type'}); |
426 |
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|
427 |
my $type = $arg->{'type'}; |
$self->{'type'} = $arg->{'type'}; |
428 |
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|
429 |
my $type_base = $type; |
my $type_base = $arg->{'type'}; |
430 |
$type_base =~ s/_.*$//g; |
$type_base =~ s/_.*$//g; |
431 |
|
|
432 |
my $f = "./import_xml/$type.xml"; |
$self->{'tag'} = $type2tag{$type_base}; |
433 |
confess "import_xml file '$f' doesn't exist!" if (! -e "$f"); |
|
434 |
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$log->info("using type '",$self->{'type'},"' tag <",$self->{'tag'},">"); |
435 |
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436 |
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my $f = "./import_xml/".$self->{'type'}.".xml"; |
437 |
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$log->logconfess("import_xml file '$f' doesn't exist!") if (! -e "$f"); |
438 |
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|
439 |
print STDERR "reading '$f'\n" if ($self->{'debug'}); |
$log->info("reading '$f'"); |
440 |
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441 |
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$self->{'import_xml_file'} = $f; |
442 |
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|
443 |
$self->{'import_xml'} = XMLin($f, |
$self->{'import_xml'} = XMLin($f, |
444 |
ForceArray => [ $type2tag{$type_base}, 'config', 'format' ], |
ForceArray => [ $self->{'tag'}, 'config', 'format' ], |
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ForceContent => 1 |
|
445 |
); |
); |
446 |
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|
447 |
print Dumper($self->{'import_xml'}); |
$log->debug("import xml is ",sub { Dumper($self->{'import_xml'}) }); |
448 |
|
|
449 |
} |
} |
450 |
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452 |
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|
453 |
Create lookup from record using lookup definition. |
Create lookup from record using lookup definition. |
454 |
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455 |
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$self->create_lookup($rec, @lookups); |
456 |
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457 |
|
Called internally by C<open_*> methods. |
458 |
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|
459 |
=cut |
=cut |
460 |
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|
461 |
sub create_lookup { |
sub create_lookup { |
462 |
my $self = shift; |
my $self = shift; |
463 |
|
|
464 |
my $rec = shift || confess "need record to create lookup"; |
my $log = $self->_get_logger(); |
465 |
confess("need HASH as first argument!") if ($rec !~ /HASH/o); |
|
466 |
|
my $rec = shift || $log->logconfess("need record to create lookup"); |
467 |
|
$log->logconfess("need HASH as first argument!") if ($rec !~ /HASH/o); |
468 |
|
|
469 |
foreach my $i (@_) { |
foreach my $i (@_) { |
470 |
if ($i->{'eval'}) { |
$log->logconfess("need key") unless defined($i->{'key'}); |
471 |
my $eval = $self->fill_in($rec,$i->{'eval'}); |
$log->logconfess("need val") unless defined($i->{'val'}); |
472 |
my $key = $self->fill_in($rec,$i->{'key'}); |
|
473 |
my @val = $self->fill_in($rec,$i->{'val'}); |
if (defined($i->{'eval'})) { |
474 |
if ($key && @val && eval $eval) { |
# eval first, so we can skip fill_in for key and val |
475 |
|
my $eval = $self->fill_in($rec,$i->{'eval'}) || next; |
476 |
|
if ($self->_eval($eval)) { |
477 |
|
my $key = $self->fill_in($rec,$i->{'key'}) || next; |
478 |
|
my @val = $self->fill_in($rec,$i->{'val'}) || next; |
479 |
|
$log->debug("stored $key = ",sub { join(" | ",@val) }); |
480 |
push @{$self->{'lookup'}->{$key}}, @val; |
push @{$self->{'lookup'}->{$key}}, @val; |
481 |
} |
} |
482 |
} else { |
} else { |
483 |
my $key = $self->fill_in($rec,$i->{'key'}); |
my $key = $self->fill_in($rec,$i->{'key'}) || next; |
484 |
my @val = $self->fill_in($rec,$i->{'val'}); |
my @val = $self->fill_in($rec,$i->{'val'}) || next; |
485 |
if ($key && @val) { |
$log->debug("stored $key = ",sub { join(" | ",@val) }); |
486 |
push @{$self->{'lookup'}->{$key}}, @val; |
push @{$self->{'lookup'}->{$key}}, @val; |
|
} |
|
487 |
} |
} |
488 |
} |
} |
489 |
} |
} |
492 |
|
|
493 |
Returns value from record. |
Returns value from record. |
494 |
|
|
495 |
$self->get_data(\$rec,$f,$sf,$i,\$found); |
my $text = $self->get_data(\$rec,$f,$sf,$i,\$found); |
496 |
|
|
497 |
Arguments are: |
Arguments are: |
498 |
record reference C<$rec>, |
record reference C<$rec>, |
500 |
optional subfiled C<$sf>, |
optional subfiled C<$sf>, |
501 |
index for repeatable values C<$i>. |
index for repeatable values C<$i>. |
502 |
|
|
503 |
Optinal variable C<$found> will be incremeted if thre |
Optinal variable C<$found> will be incremeted if there |
504 |
is field. |
is field. |
505 |
|
|
506 |
Returns value or empty string. |
Returns value or empty string. |
511 |
my $self = shift; |
my $self = shift; |
512 |
|
|
513 |
my ($rec,$f,$sf,$i,$found) = @_; |
my ($rec,$f,$sf,$i,$found) = @_; |
514 |
|
|
515 |
if ($$rec->{$f}) { |
if ($$rec->{$f}) { |
516 |
|
return '' if (! $$rec->{$f}->[$i]); |
517 |
|
no strict 'refs'; |
518 |
if ($sf && $$rec->{$f}->[$i]->{$sf}) { |
if ($sf && $$rec->{$f}->[$i]->{$sf}) { |
519 |
$$found++ if (defined($$found)); |
$$found++ if (defined($$found)); |
520 |
return $$rec->{$f}->[$i]->{$sf}; |
return $$rec->{$f}->[$i]->{$sf}; |
521 |
} elsif ($$rec->{$f}->[$i]) { |
} elsif ($$rec->{$f}->[$i]) { |
522 |
$$found++ if (defined($$found)); |
$$found++ if (defined($$found)); |
523 |
return $$rec->{$f}->[$i]; |
# it still might have subfield, just |
524 |
|
# not specified, so we'll dump all |
525 |
|
if ($$rec->{$f}->[$i] =~ /HASH/o) { |
526 |
|
my $out; |
527 |
|
foreach my $k (keys %{$$rec->{$f}->[$i]}) { |
528 |
|
$out .= $$rec->{$f}->[$i]->{$k}." "; |
529 |
|
} |
530 |
|
return $out; |
531 |
|
} else { |
532 |
|
return $$rec->{$f}->[$i]; |
533 |
|
} |
534 |
} |
} |
535 |
} else { |
} else { |
536 |
return ''; |
return ''; |
543 |
strings with placeholders and returns string or array of with substituted |
strings with placeholders and returns string or array of with substituted |
544 |
values from record. |
values from record. |
545 |
|
|
546 |
$webpac->fill_in($rec,'v250^a'); |
my $text = $webpac->fill_in($rec,'v250^a'); |
547 |
|
|
548 |
Optional argument is ordinal number for repeatable fields. By default, |
Optional argument is ordinal number for repeatable fields. By default, |
549 |
it's assume to be first repeatable field (fields are perl array, so first |
it's assume to be first repeatable field (fields are perl array, so first |
550 |
element is 0). |
element is 0). |
551 |
Following example will read second value from repeatable field. |
Following example will read second value from repeatable field. |
552 |
|
|
553 |
$webpac->fill_in($rec,'Title: v250^a',1); |
my $text = $webpac->fill_in($rec,'Title: v250^a',1); |
554 |
|
|
555 |
This function B<does not> perform parsing of format to inteligenty skip |
This function B<does not> perform parsing of format to inteligenty skip |
556 |
delimiters before fields which aren't used. |
delimiters before fields which aren't used. |
557 |
|
|
558 |
|
This method will automatically decode UTF-8 string to local code page |
559 |
|
if needed. |
560 |
|
|
561 |
=cut |
=cut |
562 |
|
|
563 |
sub fill_in { |
sub fill_in { |
564 |
my $self = shift; |
my $self = shift; |
565 |
|
|
566 |
my $rec = shift || confess "need data record"; |
my $log = $self->_get_logger(); |
567 |
my $format = shift || confess "need format to parse"; |
|
568 |
|
my $rec = shift || $log->logconfess("need data record"); |
569 |
|
my $format = shift || $log->logconfess("need format to parse"); |
570 |
# iteration (for repeatable fields) |
# iteration (for repeatable fields) |
571 |
my $i = shift || 0; |
my $i = shift || 0; |
572 |
|
|
573 |
# FIXME remove for speedup? |
# FIXME remove for speedup? |
574 |
confess("need HASH as first argument!") if ($rec !~ /HASH/o); |
$log->logconfess("need HASH as first argument!") if ($rec !~ /HASH/o); |
575 |
|
|
576 |
|
if (utf8::is_utf8($format)) { |
577 |
|
$format = $self->_x($format); |
578 |
|
} |
579 |
|
|
580 |
my $found = 0; |
my $found = 0; |
581 |
|
|
583 |
# remove eval{...} from beginning |
# remove eval{...} from beginning |
584 |
$eval_code = $1 if ($format =~ s/^eval{([^}]+)}//s); |
$eval_code = $1 if ($format =~ s/^eval{([^}]+)}//s); |
585 |
|
|
586 |
|
my $filter_name; |
587 |
|
# remove filter{...} from beginning |
588 |
|
$filter_name = $1 if ($format =~ s/^filter{([^}]+)}//s); |
589 |
|
|
590 |
# do actual replacement of placeholders |
# do actual replacement of placeholders |
591 |
$format =~ s/v(\d+)(?:\^(\w))*/$self->get_data(\$rec,$1,$2,$i,\$found)/ges; |
$format =~ s/v(\d+)(?:\^(\w))?/$self->get_data(\$rec,$1,$2,$i,\$found)/ges; |
592 |
|
|
593 |
if ($found) { |
if ($found) { |
594 |
|
$log->debug("format: $format"); |
595 |
if ($eval_code) { |
if ($eval_code) { |
596 |
my $eval = $self->fill_in($rec,$eval_code,$i); |
my $eval = $self->fill_in($rec,$eval_code,$i); |
597 |
return if (! eval $eval); |
return if (! $self->_eval($eval)); |
598 |
|
} |
599 |
|
if ($filter_name && $self->{'filter'}->{$filter_name}) { |
600 |
|
$log->debug("filter '$filter_name' for $format"); |
601 |
|
$format = $self->{'filter'}->{$filter_name}->($format); |
602 |
|
return unless(defined($format)); |
603 |
|
$log->debug("filter result: $format"); |
604 |
} |
} |
605 |
# do we have lookups? |
# do we have lookups? |
606 |
if ($format =~ /\[[^\[\]]+\]/o) { |
if ($format =~ /$LOOKUP_REGEX/o) { |
607 |
|
$log->debug("format '$format' has lookup"); |
608 |
return $self->lookup($format); |
return $self->lookup($format); |
609 |
} else { |
} else { |
610 |
return $format; |
return $format; |
618 |
|
|
619 |
Perform lookups on format supplied to it. |
Perform lookups on format supplied to it. |
620 |
|
|
621 |
my $txt = $self->lookup('[v900]'); |
my $text = $self->lookup('[v900]'); |
622 |
|
|
623 |
Lookups can be nested (like C<[d:[a:[v900]]]>). |
Lookups can be nested (like C<[d:[a:[v900]]]>). |
624 |
|
|
627 |
sub lookup { |
sub lookup { |
628 |
my $self = shift; |
my $self = shift; |
629 |
|
|
630 |
my $tmp = shift || confess "need format"; |
my $log = $self->_get_logger(); |
631 |
|
|
632 |
|
my $tmp = shift || $log->logconfess("need format"); |
633 |
|
|
634 |
if ($tmp =~ /\[[^\[\]]+\]/o) { |
if ($tmp =~ /$LOOKUP_REGEX/o) { |
635 |
my @in = ( $tmp ); |
my @in = ( $tmp ); |
636 |
#print "##lookup $tmp\n"; |
|
637 |
|
$log->debug("lookup for: ",$tmp); |
638 |
|
|
639 |
my @out; |
my @out; |
640 |
while (my $f = shift @in) { |
while (my $f = shift @in) { |
641 |
if ($f =~ /\[([^\[\]]+)\]/) { |
if ($f =~ /$LOOKUP_REGEX_SAVE/o) { |
642 |
my $k = $1; |
my $k = $1; |
643 |
if ($self->{'lookup'}->{$k}) { |
if ($self->{'lookup'}->{$k}) { |
|
#print "## lookup key = $k\n"; |
|
644 |
foreach my $nv (@{$self->{'lookup'}->{$k}}) { |
foreach my $nv (@{$self->{'lookup'}->{$k}}) { |
645 |
my $tmp2 = $f; |
my $tmp2 = $f; |
646 |
$tmp2 =~ s/\[$k\]/$nv/g; |
$tmp2 =~ s/lookup{$k}/$nv/g; |
647 |
push @in, $tmp2; |
push @in, $tmp2; |
|
#print "## lookup in => $tmp2\n"; |
|
648 |
} |
} |
649 |
} else { |
} else { |
650 |
undef $f; |
undef $f; |
651 |
} |
} |
652 |
} elsif ($f) { |
} elsif ($f) { |
653 |
push @out, $f; |
push @out, $f; |
|
#print "## lookup out => $f\n"; |
|
654 |
} |
} |
655 |
} |
} |
656 |
|
$log->logconfess("return is array and it's not expected!") unless wantarray; |
657 |
return @out; |
return @out; |
658 |
} else { |
} else { |
659 |
return $tmp; |
return $tmp; |
666 |
defined. It can also eval code in format starting with C<eval{...}> and |
defined. It can also eval code in format starting with C<eval{...}> and |
667 |
return output or nothing depending on eval code. |
return output or nothing depending on eval code. |
668 |
|
|
669 |
$webpac->parse($rec,'eval{"v901^a" eq "Deskriptor"}descriptor: v250^a', $i); |
my $text = $webpac->parse($rec,'eval{"v901^a" eq "Deskriptor"}descriptor: v250^a', $i); |
670 |
|
|
671 |
=cut |
=cut |
672 |
|
|
673 |
sub parse { |
sub parse { |
674 |
my $self = shift; |
my $self = shift; |
675 |
|
|
676 |
my ($rec, $format, $i) = @_; |
my ($rec, $format_utf8, $i) = @_; |
677 |
|
|
678 |
|
return if (! $format_utf8); |
679 |
|
|
680 |
confess("need HASH as first argument!") if ($rec !~ /HASH/o); |
my $log = $self->_get_logger(); |
681 |
|
|
682 |
|
$log->logconfess("need HASH as first argument!") if ($rec !~ /HASH/o); |
683 |
|
$log->logconfess("need utf2cp Text::Iconv object!") if (! $self->{'utf2cp'}); |
684 |
|
|
685 |
$i = 0 if (! $i); |
$i = 0 if (! $i); |
686 |
|
|
687 |
|
my $format = $self->_x($format_utf8) || $log->logconfess("can't convert '$format_utf8' from UTF-8 to ",$self->{'code_page'}); |
688 |
|
|
689 |
my @out; |
my @out; |
690 |
|
|
691 |
|
$log->debug("format: $format"); |
692 |
|
|
693 |
my $eval_code; |
my $eval_code; |
694 |
# remove eval{...} from beginning |
# remove eval{...} from beginning |
695 |
$eval_code = $1 if ($format =~ s/^eval{([^}]+)}//s); |
$eval_code = $1 if ($format =~ s/^eval{([^}]+)}//s); |
696 |
|
|
697 |
|
my $filter_name; |
698 |
|
# remove filter{...} from beginning |
699 |
|
$filter_name = $1 if ($format =~ s/^filter{([^}]+)}//s); |
700 |
|
|
701 |
my $prefix; |
my $prefix; |
702 |
my $all_found=0; |
my $all_found=0; |
703 |
|
|
704 |
#print "## $format\n"; |
while ($format =~ s/^(.*?)v(\d+)(?:\^(\w))?//s) { |
|
while ($format =~ s/^(.*?)v(\d+)(?:\^(\w))*//s) { |
|
|
#print "## [ $1 | $2 | $3 ] $format\n"; |
|
705 |
|
|
706 |
my $del = $1 || ''; |
my $del = $1 || ''; |
707 |
$prefix ||= $del if ($all_found == 0); |
$prefix ||= $del if ($all_found == 0); |
718 |
|
|
719 |
return if (! $all_found); |
return if (! $all_found); |
720 |
|
|
721 |
my $out = join('',@out) . $format; |
my $out = join('',@out); |
722 |
|
|
723 |
|
if ($out) { |
724 |
|
# add rest of format (suffix) |
725 |
|
$out .= $format; |
726 |
|
|
727 |
|
# add prefix if not there |
728 |
|
$out = $prefix . $out if ($out !~ m/^\Q$prefix\E/); |
729 |
|
|
730 |
|
$log->debug("result: $out"); |
731 |
|
} |
732 |
|
|
|
# add prefix if not there |
|
|
$out = $prefix . $out if ($out !~ m/^\Q$prefix\E/); |
|
|
|
|
733 |
if ($eval_code) { |
if ($eval_code) { |
734 |
my $eval = $self->fill_in($rec,$eval_code,$i); |
my $eval = $self->fill_in($rec,$eval_code,$i) || return; |
735 |
return if (! eval $eval); |
$log->debug("about to eval{$eval} format: $out"); |
736 |
|
return if (! $self->_eval($eval)); |
737 |
|
} |
738 |
|
|
739 |
|
if ($filter_name && $self->{'filter'}->{$filter_name}) { |
740 |
|
$log->debug("about to filter{$filter_name} format: $out"); |
741 |
|
$out = $self->{'filter'}->{$filter_name}->($out); |
742 |
|
return unless(defined($out)); |
743 |
|
$log->debug("filter result: $out"); |
744 |
|
} |
745 |
|
|
746 |
|
return $out; |
747 |
|
} |
748 |
|
|
749 |
|
=head2 parse_to_arr |
750 |
|
|
751 |
|
Similar to C<parse>, but returns array of all repeatable fields |
752 |
|
|
753 |
|
my @arr = $webpac->parse_to_arr($rec,'v250^a'); |
754 |
|
|
755 |
|
=cut |
756 |
|
|
757 |
|
sub parse_to_arr { |
758 |
|
my $self = shift; |
759 |
|
|
760 |
|
my ($rec, $format_utf8) = @_; |
761 |
|
|
762 |
|
my $log = $self->_get_logger(); |
763 |
|
|
764 |
|
$log->logconfess("need HASH as first argument!") if ($rec !~ /HASH/o); |
765 |
|
return if (! $format_utf8); |
766 |
|
|
767 |
|
my $i = 0; |
768 |
|
my @arr; |
769 |
|
|
770 |
|
while (my $v = $self->parse($rec,$format_utf8,$i++)) { |
771 |
|
push @arr, $v; |
772 |
|
} |
773 |
|
|
774 |
|
$log->debug("format '$format_utf8' returned ",--$i," elements: ", sub { join(" | ",@arr) }) if (@arr); |
775 |
|
|
776 |
|
return @arr; |
777 |
|
} |
778 |
|
|
779 |
|
=head2 fill_in_to_arr |
780 |
|
|
781 |
|
Similar to C<fill_in>, but returns array of all repeatable fields. Usable |
782 |
|
for fields which have lookups, so they shouldn't be parsed but rather |
783 |
|
C<fill_id>ed. |
784 |
|
|
785 |
|
my @arr = $webpac->fill_in_to_arr($rec,'[v900];;[v250^a]'); |
786 |
|
|
787 |
|
=cut |
788 |
|
|
789 |
|
sub fill_in_to_arr { |
790 |
|
my $self = shift; |
791 |
|
|
792 |
|
my ($rec, $format_utf8) = @_; |
793 |
|
|
794 |
|
my $log = $self->_get_logger(); |
795 |
|
|
796 |
|
$log->logconfess("need HASH as first argument!") if ($rec !~ /HASH/o); |
797 |
|
return if (! $format_utf8); |
798 |
|
|
799 |
|
my $i = 0; |
800 |
|
my @arr; |
801 |
|
|
802 |
|
while (my @v = $self->fill_in($rec,$format_utf8,$i++)) { |
803 |
|
push @arr, @v; |
804 |
|
} |
805 |
|
|
806 |
|
$log->debug("format '$format_utf8' returned ",--$i," elements: ", sub { join(" | ",@arr) }) if (@arr); |
807 |
|
|
808 |
|
return @arr; |
809 |
|
} |
810 |
|
|
811 |
|
=head2 sort_arr |
812 |
|
|
813 |
|
Sort array ignoring case and html in data |
814 |
|
|
815 |
|
my @sorted = $webpac->sort_arr(@unsorted); |
816 |
|
|
817 |
|
=cut |
818 |
|
|
819 |
|
sub sort_arr { |
820 |
|
my $self = shift; |
821 |
|
|
822 |
|
my $log = $self->_get_logger(); |
823 |
|
|
824 |
|
# FIXME add Schwartzian Transformation? |
825 |
|
|
826 |
|
my @sorted = sort { |
827 |
|
$a =~ s#<[^>]+/*>##; |
828 |
|
$b =~ s#<[^>]+/*>##; |
829 |
|
lc($b) cmp lc($a) |
830 |
|
} @_; |
831 |
|
$log->debug("sorted values: ",sub { join(", ",@sorted) }); |
832 |
|
|
833 |
|
return @sorted; |
834 |
|
} |
835 |
|
|
836 |
|
|
837 |
|
=head2 data_structure |
838 |
|
|
839 |
|
Create in-memory data structure which represents layout from C<import_xml>. |
840 |
|
It is used later to produce output. |
841 |
|
|
842 |
|
my @ds = $webpac->data_structure($rec); |
843 |
|
|
844 |
|
This method will also set C<$webpac->{'currnet_filename'}> if there is |
845 |
|
<filename> tag in C<import_xml> and C<$webpac->{'headline'}> if there is |
846 |
|
<headline> tag. |
847 |
|
|
848 |
|
=cut |
849 |
|
|
850 |
|
sub data_structure { |
851 |
|
my $self = shift; |
852 |
|
|
853 |
|
my $log = $self->_get_logger(); |
854 |
|
|
855 |
|
my $rec = shift; |
856 |
|
$log->logconfess("need HASH as first argument!") if ($rec !~ /HASH/o); |
857 |
|
|
858 |
|
undef $self->{'currnet_filename'}; |
859 |
|
undef $self->{'headline'}; |
860 |
|
|
861 |
|
my @sorted_tags; |
862 |
|
if ($self->{tags_by_order}) { |
863 |
|
@sorted_tags = @{$self->{tags_by_order}}; |
864 |
|
} else { |
865 |
|
@sorted_tags = sort { $self->_sort_by_order } keys %{$self->{'import_xml'}->{'indexer'}}; |
866 |
|
$self->{tags_by_order} = \@sorted_tags; |
867 |
|
} |
868 |
|
|
869 |
|
my @ds; |
870 |
|
|
871 |
|
$log->debug("tags: ",sub { join(", ",@sorted_tags) }); |
872 |
|
|
873 |
|
foreach my $field (@sorted_tags) { |
874 |
|
|
875 |
|
my $row; |
876 |
|
|
877 |
|
#print "field $field [",$self->{'tag'},"] = ",Dumper($self->{'import_xml'}->{'indexer'}->{$field}->{$self->{'tag'}}); |
878 |
|
|
879 |
|
foreach my $tag (@{$self->{'import_xml'}->{'indexer'}->{$field}->{$self->{'tag'}}}) { |
880 |
|
my $format = $tag->{'value'} || $tag->{'content'}; |
881 |
|
|
882 |
|
$log->debug("format: $format"); |
883 |
|
|
884 |
|
my @v; |
885 |
|
if ($format =~ /$LOOKUP_REGEX/o) { |
886 |
|
@v = $self->fill_in_to_arr($rec,$format); |
887 |
|
} else { |
888 |
|
@v = $self->parse_to_arr($rec,$format); |
889 |
|
} |
890 |
|
next if (! @v); |
891 |
|
|
892 |
|
if ($tag->{'sort'}) { |
893 |
|
@v = $self->sort_arr(@v); |
894 |
|
$log->warn("sort within tag is usually not what you want!"); |
895 |
|
} |
896 |
|
|
897 |
|
# use format? |
898 |
|
if ($tag->{'format_name'}) { |
899 |
|
@v = map { $self->apply_format($tag->{'format_name'},$tag->{'format_delimiter'},$_) } @v; |
900 |
|
} |
901 |
|
|
902 |
|
if ($field eq 'filename') { |
903 |
|
$self->{'current_filename'} = join('',@v); |
904 |
|
$log->debug("filename: ",$self->{'current_filename'}); |
905 |
|
} elsif ($field eq 'headline') { |
906 |
|
$self->{'headline'} .= join('',@v); |
907 |
|
$log->debug("headline: ",$self->{'headline'}); |
908 |
|
next; # don't return headline in data_structure! |
909 |
|
} |
910 |
|
|
911 |
|
# delimiter will join repeatable fields |
912 |
|
if ($tag->{'delimiter'}) { |
913 |
|
@v = ( join($tag->{'delimiter'}, @v) ); |
914 |
|
} |
915 |
|
|
916 |
|
# default types |
917 |
|
my @types = qw(display swish); |
918 |
|
# override by type attribute |
919 |
|
@types = ( $tag->{'type'} ) if ($tag->{'type'}); |
920 |
|
|
921 |
|
foreach my $type (@types) { |
922 |
|
# append to previous line? |
923 |
|
$log->debug("type: $type ",sub { join(" ",@v) }, $row->{'append'} || 'no append'); |
924 |
|
if ($tag->{'append'}) { |
925 |
|
|
926 |
|
# I will delimit appended part with |
927 |
|
# delimiter (or ,) |
928 |
|
my $d = $tag->{'delimiter'}; |
929 |
|
# default delimiter |
930 |
|
$d ||= " "; |
931 |
|
|
932 |
|
my $last = pop @{$row->{$type}}; |
933 |
|
$d = "" if (! $last); |
934 |
|
$last .= $d . join($d, @v); |
935 |
|
push @{$row->{$type}}, $last; |
936 |
|
|
937 |
|
} else { |
938 |
|
push @{$row->{$type}}, @v; |
939 |
|
} |
940 |
|
} |
941 |
|
|
942 |
|
|
943 |
|
} |
944 |
|
|
945 |
|
if ($row) { |
946 |
|
$row->{'tag'} = $field; |
947 |
|
|
948 |
|
# TODO: name_sigular, name_plural |
949 |
|
my $name = $self->{'import_xml'}->{'indexer'}->{$field}->{'name'}; |
950 |
|
$row->{'name'} = $name ? $self->_x($name) : $field; |
951 |
|
|
952 |
|
# post-sort all values in field |
953 |
|
if ($self->{'import_xml'}->{'indexer'}->{$field}->{'sort'}) { |
954 |
|
$log->warn("sort at field tag not implemented"); |
955 |
|
} |
956 |
|
|
957 |
|
push @ds, $row; |
958 |
|
|
959 |
|
$log->debug("row $field: ",sub { Dumper($row) }); |
960 |
|
} |
961 |
|
|
962 |
} |
} |
963 |
|
|
964 |
|
return @ds; |
965 |
|
|
966 |
|
} |
967 |
|
|
968 |
|
=head2 output |
969 |
|
|
970 |
|
Create output from in-memory data structure using Template Toolkit template. |
971 |
|
|
972 |
|
my $text = $webpac->output( template => 'text.tt', data => @ds ); |
973 |
|
|
974 |
|
=cut |
975 |
|
|
976 |
|
sub output { |
977 |
|
my $self = shift; |
978 |
|
|
979 |
|
my $args = {@_}; |
980 |
|
|
981 |
|
my $log = $self->_get_logger(); |
982 |
|
|
983 |
|
$log->logconfess("need template name") if (! $args->{'template'}); |
984 |
|
$log->logconfess("need data array") if (! $args->{'data'}); |
985 |
|
|
986 |
|
my $out; |
987 |
|
|
988 |
|
$self->{'tt'}->process( |
989 |
|
$args->{'template'}, |
990 |
|
$args, |
991 |
|
\$out |
992 |
|
) || confess $self->{'tt'}->error(); |
993 |
|
|
994 |
return $out; |
return $out; |
995 |
} |
} |
996 |
|
|
997 |
|
=head2 output_file |
998 |
|
|
999 |
|
Create output from in-memory data structure using Template Toolkit template |
1000 |
|
to a file. |
1001 |
|
|
1002 |
|
$webpac->output_file( |
1003 |
|
file => 'out.txt', |
1004 |
|
template => 'text.tt', |
1005 |
|
data => @ds |
1006 |
|
); |
1007 |
|
|
1008 |
|
=cut |
1009 |
|
|
1010 |
|
sub output_file { |
1011 |
|
my $self = shift; |
1012 |
|
|
1013 |
|
my $args = {@_}; |
1014 |
|
|
1015 |
|
my $log = $self->_get_logger(); |
1016 |
|
|
1017 |
|
my $file = $args->{'file'} || $log->logconfess("need file name"); |
1018 |
|
|
1019 |
|
$log->debug("creating file ",$file); |
1020 |
|
|
1021 |
|
open(my $fh, ">", $file) || $log->logdie("can't open output file '$file': $!"); |
1022 |
|
print $fh $self->output( |
1023 |
|
template => $args->{'template'}, |
1024 |
|
data => $args->{'data'}, |
1025 |
|
) || $log->logdie("print: $!"); |
1026 |
|
close($fh) || $log->logdie("close: $!"); |
1027 |
|
} |
1028 |
|
|
1029 |
|
=head2 apply_format |
1030 |
|
|
1031 |
|
Apply format specified in tag with C<format_name="name"> and |
1032 |
|
C<format_delimiter=";;">. |
1033 |
|
|
1034 |
|
my $text = $webpac->apply_format($format_name,$format_delimiter,$data); |
1035 |
|
|
1036 |
|
Formats can contain C<lookup{...}> if you need them. |
1037 |
|
|
1038 |
|
=cut |
1039 |
|
|
1040 |
|
sub apply_format { |
1041 |
|
my $self = shift; |
1042 |
|
|
1043 |
|
my ($name,$delimiter,$data) = @_; |
1044 |
|
|
1045 |
|
my $log = $self->_get_logger(); |
1046 |
|
|
1047 |
|
if (! $self->{'import_xml'}->{'format'}->{$name}) { |
1048 |
|
$log->warn("<format name=\"$name\"> is not defined in ",$self->{'import_xml_file'}); |
1049 |
|
return $data; |
1050 |
|
} |
1051 |
|
|
1052 |
|
$log->warn("no delimiter for format $name") if (! $delimiter); |
1053 |
|
|
1054 |
|
my $format = $self->_x($self->{'import_xml'}->{'format'}->{$name}->{'content'}) || $log->logdie("can't find format '$name'"); |
1055 |
|
|
1056 |
|
my @data = split(/\Q$delimiter\E/, $data); |
1057 |
|
|
1058 |
|
my $out = sprintf($format, @data); |
1059 |
|
$log->debug("using format $name [$format] on $data to produce: $out"); |
1060 |
|
|
1061 |
|
if ($out =~ m/$LOOKUP_REGEX/o) { |
1062 |
|
return $self->lookup($out); |
1063 |
|
} else { |
1064 |
|
return $out; |
1065 |
|
} |
1066 |
|
|
1067 |
|
} |
1068 |
|
|
1069 |
|
|
1070 |
|
# |
1071 |
|
# |
1072 |
|
# |
1073 |
|
|
1074 |
|
=head1 INTERNAL METHODS |
1075 |
|
|
1076 |
|
Here is a quick list of internal methods, mostly useful to turn debugging |
1077 |
|
on them (see L<LOGGING> below for explanation). |
1078 |
|
|
1079 |
|
=cut |
1080 |
|
|
1081 |
|
=head2 _eval |
1082 |
|
|
1083 |
|
Internal function to eval code without C<strict 'subs'>. |
1084 |
|
|
1085 |
|
=cut |
1086 |
|
|
1087 |
|
sub _eval { |
1088 |
|
my $self = shift; |
1089 |
|
|
1090 |
|
my $code = shift || return; |
1091 |
|
|
1092 |
|
my $log = $self->_get_logger(); |
1093 |
|
|
1094 |
|
no strict 'subs'; |
1095 |
|
my $ret = eval $code; |
1096 |
|
if ($@) { |
1097 |
|
$log->error("problem with eval code [$code]: $@"); |
1098 |
|
} |
1099 |
|
|
1100 |
|
$log->debug("eval: ",$code," [",$ret,"]"); |
1101 |
|
|
1102 |
|
return $ret || undef; |
1103 |
|
} |
1104 |
|
|
1105 |
|
=head2 _sort_by_order |
1106 |
|
|
1107 |
|
Sort xml tags data structure accoding to C<order=""> attribute. |
1108 |
|
|
1109 |
|
=cut |
1110 |
|
|
1111 |
|
sub _sort_by_order { |
1112 |
|
my $self = shift; |
1113 |
|
|
1114 |
|
my $va = $self->{'import_xml'}->{'indexer'}->{$a}->{'order'} || |
1115 |
|
$self->{'import_xml'}->{'indexer'}->{$a}; |
1116 |
|
my $vb = $self->{'import_xml'}->{'indexer'}->{$b}->{'order'} || |
1117 |
|
$self->{'import_xml'}->{'indexer'}->{$b}; |
1118 |
|
|
1119 |
|
return $va <=> $vb; |
1120 |
|
} |
1121 |
|
|
1122 |
|
=head2 _get_logger |
1123 |
|
|
1124 |
|
Get C<Log::Log4perl> object with a twist: domains are defined for each |
1125 |
|
method |
1126 |
|
|
1127 |
|
my $log = $webpac->_get_logger(); |
1128 |
|
|
1129 |
|
=cut |
1130 |
|
|
1131 |
|
sub _get_logger { |
1132 |
|
my $self = shift; |
1133 |
|
|
1134 |
|
my $name = (caller(1))[3] || caller; |
1135 |
|
return get_logger($name); |
1136 |
|
} |
1137 |
|
|
1138 |
|
=head2 _x |
1139 |
|
|
1140 |
|
Convert string from UTF-8 to code page defined in C<import_xml>. |
1141 |
|
|
1142 |
|
my $text = $webpac->_x('utf8 text'); |
1143 |
|
|
1144 |
|
=cut |
1145 |
|
|
1146 |
|
sub _x { |
1147 |
|
my $self = shift; |
1148 |
|
my $utf8 = shift || return; |
1149 |
|
|
1150 |
|
return $self->{'utf2cp'}->convert($utf8) || |
1151 |
|
$self->_get_logger()->logwarn("can't convert '$utf8'"); |
1152 |
|
} |
1153 |
|
|
1154 |
|
# |
1155 |
|
# |
1156 |
|
# |
1157 |
|
|
1158 |
|
=head1 LOGGING |
1159 |
|
|
1160 |
|
Logging in WebPAC is performed by L<Log::Log4perl> with config file |
1161 |
|
C<log.conf>. |
1162 |
|
|
1163 |
|
Methods defined above have different levels of logging, so |
1164 |
|
it's descriptions will be useful to turn (mostry B<debug> logging) on |
1165 |
|
or off to see why WabPAC isn't perforing as you expect it (it might even |
1166 |
|
be a bug!). |
1167 |
|
|
1168 |
|
B<This is different from normal Log4perl behaviour>. To repeat, you can |
1169 |
|
also use method names, and not only classes (which are just few) |
1170 |
|
to filter logging. |
1171 |
|
|
1172 |
|
|
1173 |
|
=head1 MEMORY USAGE |
1174 |
|
|
1175 |
|
C<low_mem> options is double-edged sword. If enabled, WebPAC |
1176 |
|
will run on memory constraint machines (which doesn't have enough |
1177 |
|
physical RAM to create memory structure for whole source database). |
1178 |
|
|
1179 |
|
If your machine has 512Mb or more of RAM and database is around 10000 records, |
1180 |
|
memory shouldn't be an issue. If you don't have enough physical RAM, you |
1181 |
|
might consider using virtual memory (if your operating system is handling it |
1182 |
|
well, like on FreeBSD or Linux) instead of dropping to L<DBD::Deep> to handle |
1183 |
|
parsed structure of ISIS database (this is what C<low_mem> option does). |
1184 |
|
|
1185 |
|
Hitting swap at end of reading source database is probably o.k. However, |
1186 |
|
hitting swap before 90% will dramatically decrease performance and you will |
1187 |
|
be better off with C<low_mem> and using rest of availble memory for |
1188 |
|
operating system disk cache (Linux is particuallary good about this). |
1189 |
|
However, every access to database record will require disk access, so |
1190 |
|
generation phase will be slower 10-100 times. |
1191 |
|
|
1192 |
|
Parsed structures are essential - you just have option to trade RAM memory |
1193 |
|
(which is fast) for disk space (which is slow). Be sure to have planty of |
1194 |
|
disk space if you are using C<low_mem> and thus L<DBD::Deep>. |
1195 |
|
|
1196 |
|
However, when WebPAC is running on desktop machines (or laptops :-), it's |
1197 |
|
highly undesireable for system to start swapping. Using C<low_mem> option can |
1198 |
|
reduce WecPAC memory usage to around 64Mb for same database with lookup |
1199 |
|
fields and sorted indexes which stay in RAM. Performance will suffer, but |
1200 |
|
memory usage will really be minimal. It might be also more confortable to |
1201 |
|
run WebPAC reniced on those machines. |
1202 |
|
|
1203 |
|
=cut |
1204 |
|
|
1205 |
1; |
1; |