/[webpac2]/trunk/lib/WebPAC/Store.pm
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revision 217 by dpavlin, Mon Dec 5 17:47:51 2005 UTC revision 710 by dpavlin, Mon Sep 25 18:58:43 2006 UTC
# Line 10  use Data::Dumper; Line 10  use Data::Dumper;
10    
11  =head1 NAME  =head1 NAME
12    
13  WebPAC::Store - Store normalized data on disk  WebPAC::Store - Store WebPAC data on disk
14    
15  =head1 VERSION  =head1 VERSION
16    
17  Version 0.05  Version 0.10
18    
19  =cut  =cut
20    
21  our $VERSION = '0.05';  our $VERSION = '0.10';
22    
23  =head1 SYNOPSIS  =head1 SYNOPSIS
24    
25  This module provides disk storage for normalised data.  This module provides disk storage for normalised data and lookups.
26    
27  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
28  flux. However, I will try to keep backward compatiblity by providing  time.
29  multiple back-ends.  
30    I will try to keep backward compatiblity by providing multiple back-ends,
31    but this can't be garanteed. In other words, don't delete your input
32    databases just yet :-)
33    
34  This has additional advantage. I can create single place to plugin other  This has additional advantage. I can create single place to plugin other
35  file formats which provide better performance for particular type of data.  file formats which provide better performance for particular type of data.
# Line 56  in which cache file for C<data_structure Line 59  in which cache file for C<data_structure
59  If called with C<read_only> it will not disable caching if  If called with C<read_only> it will not disable caching if
60  called without write permission (but will die on C<save_ds>).  called without write permission (but will die on C<save_ds>).
61    
62    Mandatory parametar C<database> is used as subdirectory in database directory.
63    
64  =cut  =cut
65    
66  sub new {  sub new {
67          my $class = shift;          my $class = shift;
68          my $self = {@_};          my $self = {@_};
69          bless($self, $class);          bless($self, $class);
70    
71            my $log = $self->_get_logger();
72    
73            foreach my $p (qw/path database/) {
74                    $log->logconfess("need $p") unless ($self->{$p});
75            }
76    
77          $self->path( $self->{'path'} );          $self->path( $self->{'path'} );
78    
# Line 120  sub path { Line 131  sub path {
131    
132  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
133    
134    my $ds = $db->load_ds( id => 42, database => 'name' );    my $ds = $db->load_ds( id => 42, prefix => 'name', database => 'ps' );
135    
136  This function will also perform basic sanity checking on returned  This function will also perform basic sanity checking on returned
137  data and disable caching if data is corrupted (or changed since last  data and disable caching if data is corrupted (or changed since last
138  update).  update).
139    
140    C<prefix> is used to differenciate different source input databases
141    which are indexed in same database.
142    
143    C<database> if B<optional> argument which will override database name used when creating
144    C<WebPAC::Store> object (for simple retrival from multiple databases).
145    
146  Returns hash or undef if cacheing is disabled or unavailable.  Returns hash or undef if cacheing is disabled or unavailable.
147    
148  =cut  =cut
# Line 148  sub load_ds { Line 165  sub load_ds {
165          my $id = $args->{id};          my $id = $args->{id};
166    
167          $log->logconfess("got hash, but without id") unless (defined($id));          $log->logconfess("got hash, but without id") unless (defined($id));
168          $log->logconfess("got hash, but id isn't number") unless ($id =~ /^\d+$/);          $log->logconfess("got hash, but id [$id] isn't number") unless ($id =~ /^\d+$/);
169    
170          my $database = $args->{database} || $self->{database};          my $database = $args->{database} || $self->{database};
171            my $prefix = $args->{prefix} || '';
172    
173          $log->logconfess("can't find database name") unless ($database);          $log->logconfess("can't find database name") unless ($database);
174    
175          my $cache_file = "$cache_path/$database#$id";          my $cache_file = "$cache_path/$database/$prefix/$id";
176          $cache_file =~ s#//#/#g;          $cache_file =~ s#//#/#go;
177    
178          $log->debug("using cache_file $cache_file");          $log->debug("using cache_file $cache_file");
179    
# Line 184  Store data_structure on disk. Line 202  Store data_structure on disk.
202    
203    $db->save_ds(    $db->save_ds(
204          id => $ds->{000}->[0],          id => $ds->{000}->[0],
205          database => 'name',          prefix => 'name',
206          ds => $ds,          ds => $ds,
207    );    );
208    
# Line 209  sub save_ds { Line 227  sub save_ds {
227                  $log->logconfess("need $f") unless ($arg->{$f});                  $log->logconfess("need $f") unless ($arg->{$f});
228          }          }
229    
230          my $database = $arg->{database} ||  $self->{database};          my $database = $self->{database};
231          $log->logconfess("can't find database name") unless ($database);          $log->logconfess("can't find database name") unless ($database);
232    
233          my $cache_file = $self->{path} . '/' . $database . '#' . $arg->{id};          my $prefix = $arg->{prefix} || '';
234    
235            my $cache_file = $self->{path} . '/' . $prefix . '/';
236            $cache_file =~ s#//#/#go;
237    
238            mkpath($cache_file) unless (-d $cache_file);
239    
240            $cache_file .= $arg->{id};
241    
242          $log->debug("creating storable cache file $cache_file");          $log->debug("creating storable cache file $cache_file");
243    
# Line 223  sub save_ds { Line 248  sub save_ds {
248    
249  }  }
250    
251    =head2 save_lookup
252    
253      $db->save_lookup( $database, $input, $key, $lookup );
254    
255    =cut
256    
257    sub save_lookup {
258            my $self = shift;
259            my ($database, $input, $key, $lookup) = @_;
260    
261            my $log = $self->_get_logger;
262    
263            my $path = $self->{'path'} . "/lookup/$input";
264    
265            mkpath($path) unless (-d $path);
266    
267            $path .= "/$key";
268    
269            if (store $lookup, $path) {
270                    $log->info("saved lookup $path");
271            } else {
272                    $log->logwarn("can't store lookup $database/$input/$key in $path: $!");
273            }
274    
275            
276    }
277    
278    
279  =head1 AUTHOR  =head1 AUTHOR
280    
281  Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>  Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>
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