use WebPAC::Common;
use base qw/WebPAC::Common/;
-use Data::Dumper;
+use Data::Dump qw/dump/;
use Encode qw/from_to/;
=head1 NAME
=head1 VERSION
-Version 0.12
+Version 0.17
=cut
-our $VERSION = '0.12';
+our $VERSION = '0.17';
=head1 SYNOPSIS
my $db = WebPAC::Input->new(
module => 'WebPAC::Input::ISIS',
- low_mem => 1,
);
$db->open( path => '/path/to/database' );
my $db = new WebPAC::Input(
module => 'WebPAC::Input::MARC',
encoding => 'ISO-8859-2',
- low_mem => 1,
recode => 'char pairs',
no_progress_bar => 1,
);
used internally). This should probably be your terminal encoding, and by
default, it C<ISO-8859-2>.
-Default is not to use C<low_mem> options (see L<MEMORY USAGE> below).
-
C<recode> is optional string constisting of character or words pairs that
should be replaced in input stream.
$log->logconfess("code_page argument is not suppored any more. change it to encoding") if ($self->{lookup});
$log->logconfess("lookup argument is not suppored any more. rewrite call to lookup_ref") if ($self->{lookup});
+ $log->logconfess("low_mem argument is not suppored any more. rewrite it to load_row and save_row") if ($self->{low_mem});
$log->logconfess("specify low-level file format module") unless ($self->{module});
- my $module = $self->{module};
- $module =~ s#::#/#g;
- $module .= '.pm';
- $log->debug("require low-level module $self->{module} from $module");
-
- require $module;
- #eval $self->{module} .'->import';
-
- # check if required subclasses are implemented
- foreach my $subclass (qw/open_db fetch_rec init dump_rec/) {
- my $n = $self->{module} . '::' . $subclass;
- if (! defined &{ $n }) {
- my $missing = "missing $subclass in $self->{module}";
- $self->{$subclass} = sub { $log->logwarn($missing) };
- } else {
- $self->{$subclass} = \&{ $n };
- }
- }
+ my $module_path = $self->{module};
+ $module_path =~ s#::#/#g;
+ $module_path .= '.pm';
+ $log->debug("require low-level module $self->{module} from $module_path");
- if ($self->{init}) {
- $log->debug("calling init");
- $self->{init}->($self, @_);
- }
+ require $module_path;
$self->{'encoding'} ||= 'ISO-8859-2';
- # running with low_mem flag? well, use DBM::Deep then.
- if ($self->{'low_mem'}) {
- $log->info("running with low_mem which impacts performance (<32 Mb memory usage)");
-
- my $db_file = "data.db";
-
- if (-e $db_file) {
- unlink $db_file or $log->logdie("can't remove '$db_file' from last run");
- $log->debug("removed '$db_file' from last run");
- }
-
- require DBM::Deep;
-
- my $db = new DBM::Deep $db_file;
-
- $log->logdie("DBM::Deep error: $!") unless ($db);
-
- if ($db->error()) {
- $log->logdie("can't open '$db_file' under low_mem: ",$db->error());
- } else {
- $log->debug("using file '$db_file' for DBM::Deep");
- }
-
- $self->{'db'} = $db;
- }
-
$self ? return $self : return undef;
}
This function will read whole database in memory and produce lookups.
+ my $store; # simple in-memory hash
+
$input->open(
path => '/path/to/database/file',
code_page => 'cp852',
limit => 500,
offset => 6000,
- lookup => $lookup_obj,
stats => 1,
- lookup_ref => sub {
- my ($k,$v) = @_;
- # store lookup $k => $v
+ lookup_coderef => sub {
+ my $rec = shift;
+ # store lookups
},
modify_records => {
900 => { '^a' => { ' : ' => '^b' } },
901 => { '*' => { '^b' => ' ; ' } },
},
modify_file => 'conf/modify/mapping.map',
+ save_row => sub {
+ my $a = shift;
+ $store->{ $a->{id} } = $a->{row};
+ },
+ load_row => sub {
+ my $a = shift;
+ return defined($store->{ $a->{id} }) &&
+ $store->{ $a->{id} };
+ },
+
);
By default, C<code_page> is assumed to be C<cp852>.
C<stats> create optional report about usage of fields and subfields
-C<lookup_coderef> is closure to call when adding C<< key => 'value' >> combinations to
-lookup.
+C<lookup_coderef> is closure to called to save data into lookups
C<modify_records> specify mapping from subfields to delimiters or from
delimiters to subfields, as well as oprations on fields (if subfield is
(hopefully) simplier sintax than YAML or perl (see L</modify_file_regex>). This option
overrides C<modify_records> if both exists for same input.
+C<save_row> and C<load_row> are low-level implementation of store engine. Calling convention
+is documented in example above.
+
Returns size of database, regardless of C<offset> and C<limit>
parametars, see also C<size>.
$log->logconfess("lookup_coderef must be CODE, not ",ref($arg->{lookup_coderef}))
if ($arg->{lookup_coderef} && ref($arg->{lookup_coderef}) ne 'CODE');
+ $log->debug( $arg->{lookup_coderef} ? '' : 'not ', "using lookup_coderef");
+
$log->logcroak("need path") if (! $arg->{'path'});
my $code_page = $arg->{'code_page'} || 'cp852';
$self->{$v} = $arg->{$v} if ($arg->{$v});
}
+ if ($arg->{load_row} || $arg->{save_row}) {
+ $log->logconfess("save_row and load_row must be defined in pair and be CODE") unless (
+ ref($arg->{load_row}) eq 'CODE' &&
+ ref($arg->{save_row}) eq 'CODE'
+ );
+ $self->{load_row} = $arg->{load_row};
+ $self->{save_row} = $arg->{save_row};
+ $log->debug("using load_row and save_row instead of in-memory hash");
+ }
+
my $filter_ref;
my $recode_regex;
my $recode_map;
$log->debug("using modify_file $p");
$rec_regex = $self->modify_file_regexps( $p );
} elsif (my $h = $arg->{modify_records}) {
- $log->debug("using modify_records ", Dumper( $h ));
+ $log->debug("using modify_records ", sub { dump( $h ) });
$rec_regex = $self->modify_record_regexps(%{ $h });
}
- $log->debug("rec_regex: ", Dumper($rec_regex)) if ($rec_regex);
+ $log->debug("rec_regex: ", sub { dump($rec_regex) }) if ($rec_regex);
- my ($db, $size) = $self->{open_db}->( $self,
+ my $class = $self->{module} || $log->logconfess("can't get low-level module name!");
+
+ my $ll_db = $class->new(
path => $arg->{path},
# filter => sub {
# my ($l,$f_nr) = @_;
%{ $arg },
);
- unless (defined($db)) {
+ unless (defined($ll_db)) {
$log->logwarn("can't open database $arg->{path}, skipping...");
return;
}
+ my $size = $ll_db->size;
+
unless ($size) {
$log->logwarn("no records in database $arg->{path}, skipping...");
return;
$log->debug("position: $pos\n");
- my $rec = $self->{fetch_rec}->($self, $pos, sub {
- my ($l,$f_nr) = @_;
+ my $rec = $ll_db->fetch_rec($pos, sub {
+ my ($l,$f_nr,$debug) = @_;
# return unless defined($l);
# return $l unless ($rec_regex && $f_nr);
+ return unless ( defined($l) && defined($f_nr) );
+
+ warn "-=> $f_nr ## |$l|\n" if ($debug);
$log->debug("-=> $f_nr ## $l");
# codepage conversion and recode_regex
my $c = 0;
foreach my $r (@{ $rec_regex->{$f_nr} }) {
my $old_l = $l;
- eval '$l =~ ' . $r;
+ $log->logconfess("expected regex in ", dump( $r )) unless defined($r->{regex});
+ eval '$l =~ ' . $r->{regex};
if ($old_l ne $l) {
- $log->debug("REGEX on $f_nr eval \$l =~ $r\n## old l: [$old_l]\n## new l: [$l]");
+ my $d = "|$old_l| -> |$l| "; # . $r->{regex};
+ $d .= ' +' . $r->{line} . ' ' . $r->{file} if defined($r->{line});
+ $d .= ' ' . $r->{debug} if defined($r->{debug});
+ $log->debug("MODIFY $d");
+ warn "*** $d\n" if ($debug);
+
}
$log->error("error applying regex: $r") if ($@);
}
}
- $log->debug("<=- $f_nr ## $l");
+ $log->debug("<=- $f_nr ## |$l|");
+ warn "<=- $f_nr ## $l\n" if ($debug);
return $l;
});
- $log->debug(sub { Dumper($rec) });
+ $log->debug(sub { dump($rec) });
if (! $rec) {
$log->warn("record $pos empty? skipping...");
}
# store
- if ($self->{low_mem}) {
- $self->{db}->put($pos, $rec);
+ if ($self->{save_row}) {
+ $self->{save_row}->({
+ id => $pos,
+ row => $rec,
+ });
} else {
$self->{data}->{$pos} = $rec;
}
if ($self->{stats}) {
# fetch clean record with regexpes applied for statistics
- my $rec = $self->{fetch_rec}->($self, $pos);
+ my $rec = $ll_db->fetch_rec($pos);
foreach my $fld (keys %{ $rec }) {
$self->{_stats}->{fld}->{ $fld }++;
$self->{max_pos} = $to_rec;
$log->debug("max_pos: $to_rec");
+ # save for dump
+ $self->{ll_db} = $ll_db;
+
return $size;
}
my $rec;
- if ($self->{low_mem}) {
- $rec = $self->{db}->get($mfn);
+ if ($self->{load_row}) {
+ $rec = $self->{load_row}->({ id => $mfn });
} else {
$rec = $self->{data}->{$mfn};
}
sub seek {
my $self = shift;
- my $pos = shift || return;
+ my $pos = shift;
my $log = $self->_get_logger();
+ $log->logconfess("called without pos") unless defined($pos);
+
if ($pos < 1) {
$log->warn("seek before first record");
$pos = 1;
} sort { $a cmp $b } keys %{ $s->{fld} }
);
- $log->debug( sub { Dumper($s) } );
+ $log->debug( sub { dump($s) } );
return $out;
}
-=head2 dump
+=head2 dump_ascii
Display humanly readable dump of record
=cut
-sub dump {
+sub dump_ascii {
my $self = shift;
- return $self->{dump_rec}->($self, $self->{pos});
+ return unless $self->{ll_db};
+ if ($self->{ll_db}->can('dump_rec')) {
+ return $self->{ll_db}->dump_ascii( $self->{pos} );
+ } else {
+ return dump( $self->{ll_db}->fetch_rec( $self->{pos} ) );
+ }
}
=head2 modify_record_regexps
-Generate hash with regexpes to be applied using l<filter>.
+Generate hash with regexpes to be applied using L<filter>.
my $regexpes = $input->modify_record_regexps(
900 => { '^a' => { ' : ' => '^b' } },
sub _get_regex {
my ($sf,$from,$to) = @_;
+
+ # protect /
+ $from =~ s!/!\\/!gs;
+ $to =~ s!/!\\/!gs;
+
+ if ($from =~ m/^regex:(.+)$/) {
+ $from = $1;
+ } else {
+ $from = '\Q' . $from . '\E';
+ }
if ($sf =~ /^\^/) {
return
- 's/\Q'. $sf .'\E([^\^]*?)\Q'. $from .'\E([^\^]*?)/'. $sf .'$1'. $to .'$2/';
+ 's/\Q'. $sf .'\E([^\^]*?)'. $from .'([^\^]*?)/'. $sf .'$1'. $to .'$2/';
} else {
return
- 's/\Q'. $from .'\E/'. $to .'/g';
+ 's/'. $from .'/'. $to .'/g';
}
}
foreach my $from (keys %{ $modify_record->{$f}->{$sf} }) {
my $to = $modify_record->{$f}->{$sf}->{$from};
#die "no field?" unless defined($to);
- $log->debug("transform: |$from| -> |$to|");
+ my $d = "|$from| -> |$to|";
+ $log->debug("transform: $d");
my $regex = _get_regex($sf,$from,$to);
- push @{ $regexpes->{$f} }, $regex;
+ push @{ $regexpes->{$f} }, { regex => $regex, debug => $d };
$log->debug("regex: $regex");
}
}
=head2 modify_file_regexps
-Generate hash with regexpes to be applied using l<filter> from
+Generate hash with regexpes to be applied using L<filter> from
pseudo hash/yaml format for regex mappings.
It should be obvious:
$log->debug("transform: |$from| -> |$to|");
my $regex = _get_regex($sf,$from,$to);
- push @{ $regexpes->{$f} }, $regex;
+ push @{ $regexpes->{$f} }, {
+ regex => $regex,
+ file => $modify_path,
+ line => $.,
+ };
$log->debug("regex: $regex");
}
}
return $regexpes;
}
-=head1 MEMORY USAGE
-
-C<low_mem> options is double-edged sword. If enabled, WebPAC
-will run on memory constraint machines (which doesn't have enough
-physical RAM to create memory structure for whole source database).
-
-If your machine has 512Mb or more of RAM and database is around 10000 records,
-memory shouldn't be an issue. If you don't have enough physical RAM, you
-might consider using virtual memory (if your operating system is handling it
-well, like on FreeBSD or Linux) instead of dropping to L<DBM::Deep> to handle
-parsed structure of ISIS database (this is what C<low_mem> option does).
-
-Hitting swap at end of reading source database is probably o.k. However,
-hitting swap before 90% will dramatically decrease performance and you will
-be better off with C<low_mem> and using rest of availble memory for
-operating system disk cache (Linux is particuallary good about this).
-However, every access to database record will require disk access, so
-generation phase will be slower 10-100 times.
-
-Parsed structures are essential - you just have option to trade RAM memory
-(which is fast) for disk space (which is slow). Be sure to have planty of
-disk space if you are using C<low_mem> and thus L<DBM::Deep>.
-
-However, when WebPAC is running on desktop machines (or laptops :-), it's
-highly undesireable for system to start swapping. Using C<low_mem> option can
-reduce WecPAC memory usage to around 64Mb for same database with lookup
-fields and sorted indexes which stay in RAM. Performance will suffer, but
-memory usage will really be minimal. It might be also more confortable to
-run WebPAC reniced on those machines.
-
-
=head1 AUTHOR
Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>
projects / webpac2 / blobdiff