/[webpac2]/trunk/lib/WebPAC/Store.pm
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revision 734 by dpavlin, Sun Oct 1 20:14:14 2006 UTC revision 735 by dpavlin, Mon Oct 2 09:31:25 2006 UTC
# Line 14  WebPAC::Store - Store WebPAC data on dis Line 14  WebPAC::Store - Store WebPAC data on dis
14    
15  =head1 VERSION  =head1 VERSION
16    
17  Version 0.13  Version 0.14
18    
19  =cut  =cut
20    
21  our $VERSION = '0.13';  our $VERSION = '0.14';
22    
23  =head1 SYNOPSIS  =head1 SYNOPSIS
24    
# Line 38  For now, this is a prototype version. Line 38  For now, this is a prototype version.
38    
39      use WebPAC::Store;      use WebPAC::Store;
40    
41      my $foo = WebPAC::Store->new();      my $store = WebPAC::Store->new();
42      ...      ...
43    
44  =head1 FUNCTIONS  =head1 FUNCTIONS
# Line 47  For now, this is a prototype version. Line 47  For now, this is a prototype version.
47    
48  Create new normalised database object  Create new normalised database object
49    
50    my $db = new WebPAC::Store(    my $store = new WebPAC::Store(
51          path => '/path/to/cache/ds/',          path => '/path/to/cache/ds/',
52          database => 'name',          database => 'name',
53          read_only => 1,          read_only => 1,
# Line 84  sub new { Line 84  sub new {
84    
85  Check if specified cache directory exist, and if not, disable caching.  Check if specified cache directory exist, and if not, disable caching.
86    
87   $db->path('./cache/ds/');   $store->path('./cache/');
88    
89  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
90  cacheing.  cacheing.
91    
92  You can also call this function to get current cache path.  You can also call this function to get current cache path.
93    
94   my $cache_path = $db->path;   my $cache_path = $store->path;
95    
96  =cut  =cut
97    
# Line 136  sub path { Line 136  sub path {
136    
137  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
138    
139    my $ds = $db->load_ds(    my $ds = $store->load_ds(
140                  database => 'ps',                  database => 'ps',
141                  input => 'name',                  input => 'name',
142                  id => 42,                  id => 42,
# Line 208  sub load_ds { Line 208  sub load_ds {
208    
209  Store data_structure on disk.  Store data_structure on disk.
210    
211    $db->save_ds(    $store->save_ds(
212          database => 'name',          database => 'name',
213          input => 'name',          input => 'name',
214          id => $ds->{000}->[0],          id => $ds->{000}->[0],
# Line 260  sub save_ds { Line 260  sub save_ds {
260    
261  Loads lookup hash from file  Loads lookup hash from file
262    
263    $data = $db->load_lookup(    $data = $store->load_lookup(
264          database => $database,          database => $database,
265          input => $input,          input => $input,
266          key => $key,          key => $key,
# Line 302  sub load_lookup { Line 302  sub load_lookup {
302    
303  Save lookup data to file.  Save lookup data to file.
304    
305    $db->save_lookup(    $store->save_lookup(
306          database => $database,          database => $database,
307          input => $input,          input => $input,
308          key => $key,          key => $key,
# Line 335  sub save_lookup { Line 335  sub save_lookup {
335                  $log->info("saved lookup $path");                  $log->info("saved lookup $path");
336                  return 1;                  return 1;
337          } else {          } else {
338                  $log->logwarn("can't save lookup $database/", $args->{input}, "/", $args->{key}, " in $path: $!");                  $log->logwarn("can't save lookup to $path: $!");
339                    return undef;
340            }
341    }
342    
343    =head2 load_row
344    
345    Loads row from input database cache (used for lookups)
346    
347      $row = $store->load_row(
348            database => $database,
349            input => $input,
350            id => 42,
351      );
352    
353    C<database> is optional.
354    
355    =cut
356    
357    sub load_row {
358            my $self = shift;
359            my $args = {@_};
360    
361            my $log = $self->_get_logger;
362    
363            foreach my $r (qw/input id/) {
364                    $log->logconfess("need '$r'") unless defined($args->{$r});
365            }
366    
367            my $database = $args->{database} || $self->{database} || $log->logconfess("no database?");
368    
369            my $path = $self->{path} . "/row/$database/" . $args->{input} . '/' . $args->{id};
370    
371            if (! -e $path) {
372                    $log->warn("input row $path doesn't exist, skipping");
373                    return;
374            }
375    
376            if (my $data = retrieve($path)) {
377                    $log->debug("loaded row $path");
378                    return $data;
379            } else {
380                    $log->logwarn("can't load row from $path: $!");
381                    return undef;
382            }
383    }
384    
385    =head2 save_row
386    
387    Save row data to file.
388    
389      $store->save_row(
390            database => $database,
391            input => $input,
392            id => $mfn,
393            row => $lookup,
394      );
395    
396    C<database> is optional.
397    
398    =cut
399    
400    sub save_row {
401            my $self = shift;
402            my $args = {@_};
403    
404            my $log = $self->_get_logger;
405    
406            foreach my $r (qw/input id row/) {
407                    $log->logconfess("need '$r'") unless defined($args->{$r});
408            }
409    
410            my $database = $args->{database} || $self->{database} || $log->logconfess("no database?");
411    
412            my $path = $self->{path} . "/row/$database/" . $args->{input};
413    
414            mkpath($path) unless (-d $path);
415    
416            $path .= "/" . $args->{id};
417    
418            if (store $args->{row}, $path) {
419                    $log->debug("saved row $path");
420                    return 1;
421            } else {
422                    $log->logwarn("can't save row to $path: $!");
423                  return undef;                  return undef;
424          }          }
425  }  }
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