use warnings;
use strict;
-use base 'WebPAC::Common';
+use WebPAC::Common;
+use base qw/WebPAC::Common Class::Accessor/;
+__PACKAGE__->mk_accessors(qw/database/);
+
use Storable;
use File::Path;
-use Data::Dumper;
+use Data::Dump qw/dump/;
=head1 NAME
-WebPAC::Store - Store normalized data on disk
+WebPAC::Store - Store WebPAC data on disk
=head1 VERSION
-Version 0.06
+Version 0.15
=cut
-our $VERSION = '0.06';
+our $VERSION = '0.15';
=head1 SYNOPSIS
-This module provides disk storage for normalised data.
+This module provides disk storage for normalised data and lookups.
+
+It is one of newer components of WebPAC, so it will change from time to
+time.
-It is newest component of WebPAC, so it will change quite often or be in
-flux. However, I will try to keep backward compatiblity by providing
-multiple back-ends.
+I will try to keep backward compatiblity by providing multiple back-ends,
+but this can't be garanteed. In other words, don't delete your input
+databases just yet :-)
This has additional advantage. I can create single place to plugin other
file formats which provide better performance for particular type of data.
-For now, this is a prototype version.
-
- use WebPAC::Store;
-
- my $foo = WebPAC::Store->new();
- ...
-
=head1 FUNCTIONS
=head2 new
Create new normalised database object
- my $db = new WebPAC::Store(
- path => '/path/to/cache/ds/',
+ my $store = new WebPAC::Store({
database => 'name',
- read_only => 1,
- );
+ });
Optional parameter C<path> defines path to directory
in which cache file for C<data_structure> call will be created.
-If called with C<read_only> it will not disable caching if
-called without write permission (but will die on C<save_ds>).
-
-Mandatory parametar C<database> is used as subdirectory in database directory.
-
-=cut
-
-sub new {
- my $class = shift;
- my $self = {@_};
- bless($self, $class);
-
- my $log = $self->_get_logger();
-
- foreach my $p (qw/path database/) {
- $log->logconfess("need $p") unless ($self->{$p});
- }
-
- $self->path( $self->{'path'} );
-
- $self ? return $self : return undef;
-}
-
-=head2 path
-
-Check if specified cache directory exist, and if not, disable caching.
-
- $db->path('./cache/ds/');
-
-If you pass false or zero value to this function, it will disable
-cacheing.
-
-You can also example C<< $db->{path} >> to get current cache path.
+Optional parametar C<database> will be used used as subdirectory in path if no
+database in specified when calling other functions.
=cut
-sub path {
- my $self = shift;
-
- my $dir = shift;
-
- my $log = $self->_get_logger();
-
- if ($dir) {
- my $msg;
- if (! -e $dir) {
- if ($self->{'read_only'}) {
- $msg = "doesn't exist";
- } else {
- $log->info("creating $dir");
- mkpath $dir;
- }
- } elsif (! -d $dir) {
- $msg = "is not directory";
- } elsif (! -w $dir) {
- $msg = "not writable" unless ($self->{'read_only'});
- }
-
- if ($msg) {
- $log->warn("cache path $dir $msg, disabling...");
- undef $self->{'path'};
- } else {
- $log->debug("using cache dir $dir");
- $self->{'path'} = $dir;
- }
- } else {
- $log->debug("disabling cache");
- undef $self->{'path'};
- }
-}
-
=head2 load_ds
Retrive from disk one data_structure records usually using field 000 as key
- my $ds = $db->load_ds( id => 42, prefix => 'name' );
+ my $ds = $store->load_ds(
+ database => 'ps',
+ input => 'name',
+ id => 42,
+ );
This function will also perform basic sanity checking on returned
data and disable caching if data is corrupted (or changed since last
update).
-C<prefix> is used to differenciate different source input databases
+C<input> is used to differenciate different source input databases
which are indexed in same database.
+C<database> if B<optional> argument which will override database name used when creating
+C<WebPAC::Store> object (for simple retrival from multiple databases).
+
Returns hash or undef if cacheing is disabled or unavailable.
=cut
my $log = $self->_get_logger;
- my $cache_path = $self->{'path'};
-
- if (! $cache_path) {
- $log->warn("path not set, ignoring load_ds");
- return;
- }
-
$log->logconfess("arguments for load_ds must be HASH") unless (ref(\@_) eq 'ARRAY' && ($#_ % 2 == 1));
my $args = {@_};
$log->logconfess("got hash, but without id") unless (defined($id));
$log->logconfess("got hash, but id [$id] isn't number") unless ($id =~ /^\d+$/);
- my $database = $self->{database};
- my $prefix = $args->{prefix} || '';
-
- $log->logconfess("can't find database name") unless ($database);
+ my $database = $args->{database} || $self->database || $log->logconfess("no database?");
- my $cache_file = "$cache_path/$prefix/$database#$id";
- $cache_file =~ s#//#/#go;
+ my $input = $args->{input} || '';
-open(my $fh, '>>', '/tmp/foo');
-print $fh "$cache_file\n";
-close($fh);
+ my $cache_file = $self->var_path( 'ds', $database, $input, $id );
$log->debug("using cache_file $cache_file");
if ($ds_ref->{'ds'}) {
return $ds_ref->{'ds'};
} else {
- $log->warn("cache entry $cache_file corrupt. Use rm $cache_path/* to re-create it on next run!");
- undef $self->{'path'};
+ $log->warn("cache entry $cache_file corrupt. Use rm $cache_file to re-create it on next run!");
}
}
} else {
Store data_structure on disk.
- $db->save_ds(
+ $store->save_ds(
+ database => 'name',
+ input => 'name',
id => $ds->{000}->[0],
- prefix => 'name',
ds => $ds,
);
-B<Totally broken, but fast.>
-
-Depends on filename generated by C<load_ds>.
+C<database> and C<input> are optional.
=cut
sub save_ds {
my $self = shift;
- die "can't write to database in read_only mode!" if ($self->{'read_only'});
-
- return unless($self->{'path'});
-
- my $arg = {@_};
+ my $args = {@_};
my $log = $self->_get_logger;
+ $log->debug("save_ds arguments:", sub { dump( \@_ ) });
foreach my $f (qw/id ds/) {
- $log->logconfess("need $f") unless ($arg->{$f});
+ $log->logconfess("need $f") unless (defined($args->{$f}));
}
- my $database = $self->{database};
- $log->logconfess("can't find database name") unless ($database);
+ my $database = $args->{database} || $self->{database};
+ $log->logconfess("can't find database name") unless (defined($database));
- my $prefix = $arg->{prefix} || '';
+ my $input = $args->{input} || '';
- my $cache_file = $self->{path} . "/$prefix/$database#" . $arg->{id};
- $cache_file =~ s#//#/#go;
+ my $cache_file = $self->var_path( 'ds', $database, $input );
+
+ mkpath($cache_file) unless (-d $cache_file);
+
+ $cache_file = $self->var_path( 'ds', $database, $input, $args->{id} );
$log->debug("creating storable cache file $cache_file");
return store {
- ds => $arg->{ds},
- id => $arg->{id},
+ ds => $args->{ds},
+ id => $args->{id},
}, $cache_file;
}
+=head2 load_lookup
+
+Loads lookup hash from file
+
+ $data = $store->load_lookup(
+ database => $database,
+ input => $input,
+ key => $key,
+ );
+
+C<database> is optional.
+
+=cut
+
+sub load_lookup {
+ my $self = shift;
+ my $args = {@_};
+
+ my $log = $self->_get_logger;
+
+ foreach my $r (qw/input key/) {
+ $log->logconfess("need '$r'") unless defined($args->{$r});
+ }
+
+ my $database = $args->{database} || $self->{database} || $log->logconfess("no database?");
+
+ my $path = $self->var_path( 'lookup', $database, $args->{input}, $args->{key} );
+
+ if (! -e $path) {
+ $log->error("lookup $path doesn't exist, lookups will be disabled. Try re-indexing $database/", $args->{input});
+ return;
+ }
+
+ if (my $data = retrieve($path)) {
+ $log->info("loaded lookup $path");
+ return $data;
+ } else {
+ $log->logwarn("can't load lookup $database/", $args->{input}, "/", $args->{key}, " from $path: $!");
+ return undef;
+ }
+}
+
+=head2 save_lookup
+
+Save lookup data to file.
+
+ $store->save_lookup(
+ database => $database,
+ input => $input,
+ key => $key,
+ data => $lookup,
+ );
+
+C<database> is optional.
+
+=cut
+
+sub save_lookup {
+ my $self = shift;
+ my $args = {@_};
+
+ my $log = $self->_get_logger;
+
+ foreach my $r (qw/input key data/) {
+ $log->logconfess("need '$r'") unless defined($args->{$r});
+ }
+
+ my $database = $args->{database} || $self->{database} || $log->logconfess("no database?");
+
+ my $path = $self->var_path( 'lookup', $database, $args->{input} );
+
+ mkpath($path) unless (-d $path);
+
+ $path .= "/" . $args->{key};
+
+ my $t = time();
+
+ if (store $args->{data}, $path) {
+ $log->info(sprintf("saved lookup $path in %.2fs", time() - $t));
+ return 1;
+ } else {
+ $log->logwarn("can't save lookup to $path: $!");
+ return undef;
+ }
+}
+
+=head2 load_row
+
+Loads row from input database cache (used for lookups)
+
+ $row = $store->load_row(
+ database => $database,
+ input => $input,
+ id => 42,
+ );
+
+C<database> is optional.
+
+=cut
+
+sub load_row {
+ my $self = shift;
+ my $args = {@_};
+
+ my $log = $self->_get_logger;
+
+ foreach my $r (qw/input id/) {
+ $log->logconfess("need '$r'") unless defined($args->{$r});
+ }
+
+ my $database = $args->{database} || $self->{database} || $log->logconfess("no database?");
+
+ my $path = $self->var_path( 'row', $database, $args->{input}, $args->{id} );
+
+ if (! -e $path) {
+ $log->warn("input row $path doesn't exist, skipping");
+ return;
+ }
+
+ if (my $data = retrieve($path)) {
+ $log->debug("loaded row $path");
+ return $data;
+ } else {
+ $log->logwarn("can't load row from $path: $!");
+ return undef;
+ }
+}
+
+=head2 save_row
+
+Save row data to file.
+
+ $store->save_row(
+ database => $database,
+ input => $input,
+ id => $mfn,
+ row => $lookup,
+ );
+
+C<database> is optional.
+
+=cut
+
+sub save_row {
+ my $self = shift;
+ my $args = {@_};
+
+ my $log = $self->_get_logger;
+
+ foreach my $r (qw/input id row/) {
+ $log->logconfess("need '$r'") unless defined($args->{$r});
+ }
+
+ my $database = $args->{database} || $self->{database} || $log->logconfess("no database?");
+
+ my $path = $self->var_path( 'row', $database, $args->{input} );
+
+ mkpath($path) unless (-d $path);
+
+ $path .= "/" . $args->{id};
+
+ if (store $args->{row}, $path) {
+ $log->debug("saved row $path");
+ return 1;
+ } else {
+ $log->logwarn("can't save row to $path: $!");
+ return undef;
+ }
+}
+
+
=head1 AUTHOR
Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>
=head1 COPYRIGHT & LICENSE
-Copyright 2005 Dobrica Pavlinusic, All Rights Reserved.
+Copyright 2005-2006 Dobrica Pavlinusic, All Rights Reserved.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
projects / webpac2 / blobdiff