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use base 'WebPAC::Common'; |
use base 'WebPAC::Common'; |
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use Storable; |
use Storable; |
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use File::Path; |
use File::Path; |
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use Data::Dumper; |
use Data::Dump qw/dump/; |
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=head1 NAME |
=head1 NAME |
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WebPAC::Store - Store normalized data on disk |
WebPAC::Store - Store WebPAC data on disk |
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=head1 VERSION |
=head1 VERSION |
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Version 0.06 |
Version 0.12 |
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=cut |
=cut |
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our $VERSION = '0.06'; |
our $VERSION = '0.12'; |
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=head1 SYNOPSIS |
=head1 SYNOPSIS |
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This module provides disk storage for normalised data. |
This module provides disk storage for normalised data and lookups. |
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It is newest component of WebPAC, so it will change quite often or be in |
It is one of newer components of WebPAC, so it will change from time to |
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flux. However, I will try to keep backward compatiblity by providing |
time. |
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multiple back-ends. |
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I will try to keep backward compatiblity by providing multiple back-ends, |
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but this can't be garanteed. In other words, don't delete your input |
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databases just yet :-) |
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This has additional advantage. I can create single place to plugin other |
This has additional advantage. I can create single place to plugin other |
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file formats which provide better performance for particular type of data. |
file formats which provide better performance for particular type of data. |
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If called with C<read_only> it will not disable caching if |
If called with C<read_only> it will not disable caching if |
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called without write permission (but will die on C<save_ds>). |
called without write permission (but will die on C<save_ds>). |
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Mandatory parametar C<database> is used as subdirectory in database directory. |
Optional parametar C<database> will be used used as subdirectory in path if no |
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database in specified when calling other functions. |
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=cut |
=cut |
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sub new { |
sub new { |
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my $class = shift; |
my $class = shift; |
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my $self = {@_}; |
my $self = {@_}; |
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bless($self, $class); |
bless($self, $class); |
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my $log = $self->_get_logger(); |
my $log = $self->_get_logger(); |
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foreach my $p (qw/path database/) { |
foreach my $p (qw/path/) { |
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$log->logconfess("need $p") unless ($self->{$p}); |
$log->logconfess("need $p") unless ($self->{$p}); |
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} |
} |
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If you pass false or zero value to this function, it will disable |
If you pass false or zero value to this function, it will disable |
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cacheing. |
cacheing. |
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You can also example C<< $db->{path} >> to get current cache path. |
You can also call this function to get current cache path. |
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my $cache_path = $db->path; |
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=cut |
=cut |
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my $self = shift; |
my $self = shift; |
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my $dir = shift; |
my $dir = shift; |
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return $self->{path} unless defined($dir); |
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my $log = $self->_get_logger(); |
my $log = $self->_get_logger(); |
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Retrive from disk one data_structure records usually using field 000 as key |
Retrive from disk one data_structure records usually using field 000 as key |
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my $ds = $db->load_ds( id => 42, prefix => 'name' ); |
my $ds = $db->load_ds( |
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database => 'ps', |
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input => 'name', |
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id => 42, |
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); |
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This function will also perform basic sanity checking on returned |
This function will also perform basic sanity checking on returned |
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data and disable caching if data is corrupted (or changed since last |
data and disable caching if data is corrupted (or changed since last |
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update). |
update). |
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C<prefix> is used to differenciate different source input databases |
C<input> is used to differenciate different source input databases |
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which are indexed in same database. |
which are indexed in same database. |
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C<database> if B<optional> argument which will override database name used when creating |
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C<WebPAC::Store> object (for simple retrival from multiple databases). |
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Returns hash or undef if cacheing is disabled or unavailable. |
Returns hash or undef if cacheing is disabled or unavailable. |
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=cut |
=cut |
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$log->logconfess("got hash, but without id") unless (defined($id)); |
$log->logconfess("got hash, but without id") unless (defined($id)); |
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$log->logconfess("got hash, but id [$id] isn't number") unless ($id =~ /^\d+$/); |
$log->logconfess("got hash, but id [$id] isn't number") unless ($id =~ /^\d+$/); |
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my $database = $self->{database}; |
my $database = $args->{database} || $self->{database} || $log->logconfess("no database?"); |
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my $prefix = $args->{prefix} || ''; |
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$log->logconfess("can't find database name") unless ($database); |
my $input = $args->{input} || ''; |
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my $cache_file = "$cache_path/$prefix/$database#$id"; |
my $cache_file = "$cache_path/$database/$input/$id"; |
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$cache_file =~ s#//#/#go; |
$cache_file =~ s#//#/#go; |
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open(my $fh, '>>', '/tmp/foo'); |
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print $fh "$cache_file\n"; |
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close($fh); |
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$log->debug("using cache_file $cache_file"); |
$log->debug("using cache_file $cache_file"); |
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if (-r $cache_file) { |
if (-r $cache_file) { |
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Store data_structure on disk. |
Store data_structure on disk. |
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$db->save_ds( |
$db->save_ds( |
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database => 'name', |
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input => 'name', |
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id => $ds->{000}->[0], |
id => $ds->{000}->[0], |
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prefix => 'name', |
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ds => $ds, |
ds => $ds, |
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); |
); |
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B<Totally broken, but fast.> |
C<database> and C<input> are optional. |
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Depends on filename generated by C<load_ds>. |
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=cut |
=cut |
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return unless($self->{'path'}); |
return unless($self->{'path'}); |
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my $arg = {@_}; |
my $args = {@_}; |
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my $log = $self->_get_logger; |
my $log = $self->_get_logger; |
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$log->debug("save_ds arguments:", dump( \@_ )); |
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foreach my $f (qw/id ds/) { |
foreach my $f (qw/id ds/) { |
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$log->logconfess("need $f") unless ($arg->{$f}); |
$log->logconfess("need $f") unless (defined($args->{$f})); |
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} |
} |
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my $database = $self->{database}; |
my $database = $args->{database} || $self->{database}; |
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$log->logconfess("can't find database name") unless ($database); |
$log->logconfess("can't find database name") unless (defined($database)); |
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my $prefix = $arg->{prefix} || ''; |
my $input = $args->{input} || ''; |
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my $cache_file = $self->{path} . "/$prefix/$database#" . $arg->{id}; |
my $cache_file = $self->{path} . "/$database/$input/"; |
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$cache_file =~ s#//#/#go; |
$cache_file =~ s#//#/#go; |
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mkpath($cache_file) unless (-d $cache_file); |
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$cache_file .= $args->{id}; |
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$log->debug("creating storable cache file $cache_file"); |
$log->debug("creating storable cache file $cache_file"); |
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return store { |
return store { |
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ds => $arg->{ds}, |
ds => $args->{ds}, |
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id => $arg->{id}, |
id => $args->{id}, |
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}, $cache_file; |
}, $cache_file; |
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} |
} |
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=head2 load_lookup |
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Loads lookup hash from file |
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$data = $db->load_lookup( |
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database => $database, |
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input => $input, |
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key => $key, |
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); |
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C<database> is optional. |
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=cut |
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sub load_lookup { |
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my $self = shift; |
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my $args = {@_}; |
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my $log = $self->_get_logger; |
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foreach my $r (qw/input key/) { |
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$log->logconfess("need '$r'") unless defined($args->{$r}); |
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} |
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my $database = $args->{database} || $self->{database} || $log->logconfess("no database?"); |
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my $path = $self->{path} . "/lookup/$database/" . $args->{input} . '/' . $args->{key}; |
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if (! -e $path) { |
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$log->warn("lookup $path doesn't exist, skipping"); |
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return; |
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} |
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if (my $data = retrieve($path)) { |
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$log->info("loaded lookup $path"); |
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return $data; |
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} else { |
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$log->logwarn("can't load lookup $database/", $args->{input}, "/", $args->{key}, " from $path: $!"); |
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return undef; |
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} |
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} |
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=head2 save_lookup |
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Save lookup data to file. |
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$db->save_lookup( |
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database => $database, |
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input => $input, |
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key => $key, |
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data => $lookup, |
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); |
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C<database> is optional. |
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=cut |
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sub save_lookup { |
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my $self = shift; |
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my $args = {@_}; |
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my $log = $self->_get_logger; |
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foreach my $r (qw/input key data/) { |
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$log->logconfess("need '$r'") unless defined($args->{$r}); |
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} |
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my $database = $args->{database} || $self->{database} || $log->logconfess("no database?"); |
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my $path = $self->{path} . "/lookup/$database/" . $args->{input}; |
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mkpath($path) unless (-d $path); |
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$path .= "/" . $args->{key}; |
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if (store $args->{data}, $path) { |
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$log->info("saved lookup $path"); |
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return 1; |
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} else { |
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$log->logwarn("can't save lookup $database/", $args->{input}, "/", $args->{key}, " in $path: $!"); |
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return undef; |
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} |
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} |
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=head1 AUTHOR |
=head1 AUTHOR |
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Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
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=head1 COPYRIGHT & LICENSE |
=head1 COPYRIGHT & LICENSE |
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Copyright 2005 Dobrica Pavlinusic, All Rights Reserved. |
Copyright 2005-2006 Dobrica Pavlinusic, All Rights Reserved. |
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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 |
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under the same terms as Perl itself. |
under the same terms as Perl itself. |