use base 'WebPAC::Common';
use Storable;
use File::Path;
+use Data::Dump qw/dump/;
=head1 NAME
-WebPAC::Store - Store normalized data on disk
+WebPAC::Store - Store WebPAC data on disk
=head1 VERSION
-Version 0.04
+Version 0.14
=cut
-our $VERSION = '0.04';
+our $VERSION = '0.14';
=head1 SYNOPSIS
-This module provides disk storage for normalised data.
+This module provides disk storage for normalised data and lookups.
-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.
+It is one of newer components of WebPAC, so it will change from time to
+time.
+
+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.
use WebPAC::Store;
- my $foo = WebPAC::Store->new();
+ my $store = WebPAC::Store->new();
...
=head1 FUNCTIONS
Create new normalised database object
- my $db = new WebPAC::Store(
+ my $store = new WebPAC::Store(
path => '/path/to/cache/ds/',
+ database => 'name',
read_only => 1,
);
If called with C<read_only> it will not disable caching if
called without write permission (but will die on C<save_ds>).
+Optional parametar C<database> will be used used as subdirectory in path if no
+database in specified when calling other functions.
+
=cut
sub new {
my $class = shift;
- my $self = {@_};
- bless($self, $class);
+ my $self = {@_};
+ bless($self, $class);
+
+ my $log = $self->_get_logger();
+
+ foreach my $p (qw/path/) {
+ $log->logconfess("need $p") unless ($self->{$p});
+ }
$self->path( $self->{'path'} );
Check if specified cache directory exist, and if not, disable caching.
- $db->path('./cache/ds/');
+ $store->path('./cache/');
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.
+You can also call this function to get current cache path.
+
+ my $cache_path = $store->path;
=cut
my $self = shift;
my $dir = shift;
+
+ return $self->{path} unless defined($dir);
my $log = $self->_get_logger();
=head2 load_ds
-Retrive from disk one data_structure records using field 000 as key
-
- my $ds = $db->load_ds( 42 );
+Retrive from disk one data_structure records usually using field 000 as key
-There is also a more verbose form, similar to C<save_ds>
-
- my $ds = $db->load_ds( id => 42 );
+ 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<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
sub load_ds {
my $self = shift;
- return unless $self->{'path'};
-
my $log = $self->_get_logger;
my $cache_path = $self->{'path'};
- my $id = shift;
- if (lc($id) eq 'id') {
- $id = shift;
- $log->logconfess("got hash, but without key id") unless (defined($id));
- $log->logconfess("got hash, but id isn't number") unless ($id =~ /^\d+$/);
+ if (! $cache_path) {
+ $log->warn("path not set, ignoring load_ds");
+ return;
}
- if (! defined($id)) {
- $log->warn("called without id");
- return undef;
- } else {
- my $cache_file = "$cache_path/$id";
- if (-r $cache_file) {
- my $ds_ref = retrieve($cache_file);
- if ($ds_ref) {
- $log->debug("cache hit: $cache_file");
- my $ok = 1;
-# foreach my $f (qw(current_filename headline)) {
-# if ($ds_ref->{$f}) {
-# $self->{$f} = $ds_ref->{$f};
-# } else {
-# $ok = 0;
-# }
-# };
- if ($ok && $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'};
- }
+ $log->logconfess("arguments for load_ds must be HASH") unless (ref(\@_) eq 'ARRAY' && ($#_ % 2 == 1));
+
+ my $args = {@_};
+ my $id = $args->{id};
+
+ $log->logconfess("got hash, but without id") unless (defined($id));
+ $log->logconfess("got hash, but id [$id] isn't number") unless ($id =~ /^\d+$/);
+
+ my $database = $args->{database} || $self->{database} || $log->logconfess("no database?");
+
+ my $input = $args->{input} || '';
+
+ my $cache_file = "$cache_path/ds/$database/$input/$id";
+ $cache_file =~ s#//#/#go;
+
+ $log->debug("using cache_file $cache_file");
+
+ if (-r $cache_file) {
+ my $ds_ref = retrieve($cache_file);
+ if ($ds_ref) {
+ $log->debug("cache hit: $cache_file");
+ if ($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 $self->{'path'};
}
- } else {
- #$log->warn("cache entry $cache_file doesn't exist");
- return undef;
}
+ } else {
+ #$log->warn("cache entry $cache_file doesn't exist");
+ return undef;
}
return undef;
Store data_structure on disk.
- $db->save_ds(
+ $store->save_ds(
+ database => 'name',
+ input => 'name',
id => $ds->{000}->[0],
ds => $ds,
);
-B<Totally broken, but fast.>
-
-Depends on filename generated by C<load_ds>.
+C<database> and C<input> are optional.
=cut
return unless($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 $cache_file = $self->{path} . '/' . $arg->{id};
+ my $database = $args->{database} || $self->{database};
+ $log->logconfess("can't find database name") unless (defined($database));
+
+ my $input = $args->{input} || '';
+
+ my $cache_file = $self->{path} . "/ds/$database/$input/";
+ $cache_file =~ s#//#/#go;
+
+ mkpath($cache_file) unless (-d $cache_file);
+
+ $cache_file .= $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 = $self->{path} . "/lookup/$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 = $self->{path} . "/lookup/$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 = $self->{path} . "/row/$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 = $self->{path} . "/row/$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