/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.10 by joko, Tue Dec 3 15:53:23 2002 UTC revision 1.28 by joko, Thu Feb 20 20:20:26 2003 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.28  2003/02/20 20:20:26  joko
7    #  tried to get auto-disconnect working again - failed with that
8    #
9    #  Revision 1.27  2003/01/31 06:30:59  joko
10    #  + enabled 'sendQuery'
11    #
12    #  Revision 1.26  2003/01/30 22:29:47  joko
13    #  + fixed module usage (removed dependency on 'libp.pm')
14    #
15    #  Revision 1.25  2003/01/19 02:30:05  joko
16    #  + fix: modified call to '_initSchema'
17    #
18    #  Revision 1.24  2002/12/22 14:13:01  joko
19    #  + sub dropDb
20    #
21    #  Revision 1.23  2002/12/19 16:31:53  joko
22    #  +- renamed sub to 'rebuildDb'
23    #
24    #  Revision 1.22  2002/12/18 22:28:16  jonen
25    #  + added extended logging at 'getObjectByGuid()'
26    #
27    #  Revision 1.21  2002/12/16 22:20:49  jonen
28    #  + fixed bug at 'getObjectByGuid()'
29    #
30    #  Revision 1.20  2002/12/16 20:49:17  jonen
31    #  + added sub 'getObjectByGuid()'
32    #  + added functionality to use 'getObjectByGuid' at 'getObjectAsHash()'
33    #
34    #  Revision 1.19  2002/12/16 06:46:09  joko
35    #  + attempt to introduce a generic '_patchSchema' - cancelled!
36    #
37    #  Revision 1.18  2002/12/13 21:48:07  joko
38    #  + fix to 'sub sendQuery'
39    #
40    #  Revision 1.17  2002/12/12 02:51:09  joko
41    #  + cosmetics
42    #
43    #  Revision 1.16  2002/12/11 06:54:10  joko
44    #  + fix: encapsulated object-loading inside an 'eval'
45    #
46    #  Revision 1.15  2002/12/05 13:55:21  joko
47    #  + now utilizing 'expand' instead of 'var_deref'
48    #  + played around with having fresh-objects - no progress....
49    #
50    #  Revision 1.14  2002/12/05 09:40:30  jonen
51    #  + added option->{destroy} at getObject for unloading all instance
52    #
53    #  Revision 1.13  2002/12/05 07:59:04  joko
54    #  + now using Tie::SecureHash as a base for the COREHANDLE
55    #  + former public COREHANDLE becomes private _COREHANDLE now
56    #  + sub getCOREHANDLE
57    #
58    #  Revision 1.12  2002/12/04 11:34:49  joko
59    #  - $schema_tangram doesn't have to be in class?
60    #
61    #  Revision 1.11  2002/12/04 08:54:08  jonen
62    #  + untested bugfix: undef($object) after transform to hash at getObjectAsHash
63    #
64  #  Revision 1.10  2002/12/03 15:53:23  joko  #  Revision 1.10  2002/12/03 15:53:23  joko
65  #  + small bugfix regarding object hierarchy  #  + small bugfix regarding object hierarchy
66  #  #
# Line 56  package Data::Storage::Handler::Tangram; Line 114  package Data::Storage::Handler::Tangram;
114  use strict;  use strict;
115  use warnings;  use warnings;
116    
117    use base ("Data::Storage::Handler");
118  use base ("Data::Storage::Handler::Abstract");  use base ("Data::Storage::Handler::Abstract");
119    
120  use Tangram;  
121  use Data::Dumper;  use Data::Dumper;
122  use libp qw( getNewPerlObjectByPkgName );  use Tangram;
123    
124    use DesignPattern::Object;
125  use Data::Storage::Result::Tangram;  use Data::Storage::Result::Tangram;
126  use Data::Compare::Struct qw( isEmpty );  use Data::Compare::Struct qw( isEmpty );
127  use Data::Transform::Deep qw( var_deref );  use Data::Transform::Deep qw( expand );
128  use Data::Transform::Encode qw( var2utf8 );  #use Data::Transform::Encode qw( var2utf8 );
   
129    
130  # get logger instance  # get logger instance
131  my $logger = Log::Dispatch::Config->instance;  my $logger = Log::Dispatch::Config->instance;
132    
133    
134    # this holds the complete instantiated schema from tangram
135    my $schema_tangram;
136    
137  sub getMetaInfo {  sub getMetaInfo {
138    my $self = shift;    my $self = shift;
139    $logger->debug( __PACKAGE__ . "->getMetaInfo()"  );    $logger->debug( __PACKAGE__ . "->getMetaInfo()"  );
# Line 82  sub getMetaInfo { Line 145  sub getMetaInfo {
145  sub _initSchema {  sub _initSchema {
146    my $self = shift;    my $self = shift;
147    $logger->debug( __PACKAGE__ . "->_initSchema()" );    $logger->debug( __PACKAGE__ . "->_initSchema()" );
148    #if (!$self->{schema_tangram}) {    #if (!$schema_tangram) {
149      my $obj = getNewPerlObjectByPkgName($self->{locator}->{schema}, { EXPORT_OBJECTS => $self->{locator}->{classnames}, want_transactions => $self->{locator}->{want_transactions} } );      #my $obj = getNewPerlObjectByPkgName($self->{locator}->{schema}, { EXPORT_OBJECTS => $self->{locator}->{classnames}, want_transactions => $self->{locator}->{want_transactions} } );
150      $self->{schema_tangram} = $obj->getSchema();      my $obj = DesignPattern::Object->fromPackage($self->{locator}->{schema}, { 'EXPORT_OBJECTS' => $self->{locator}->{classnames}, 'want_transactions' => $self->{locator}->{want_transactions} } );
151        $schema_tangram = $obj->getSchema();
152    #}    #}
153    if (!$self->{schema_tangram}) {    if (!$schema_tangram) {
154      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );
155      return 0;      return 0;
156    }    }
157      #$self->_patchSchema();
158    return 1;    return 1;
159  }  }
160    
161    sub _patchSchema {
162      my $self = shift;
163      foreach (keys %{$schema_tangram->{classes}}) {
164        next if $schema_tangram->{classes}->{$_}->{abstract};
165        #next if ($_ ne 'TsBankAccount');
166        #$_ ne 'AbstractAccount' &&
167        print "class: $_", "\n";
168    #print Dumper($schema_tangram->{classes}->{$_});
169        # create new string property named 'guid'
170        my $tstring = Tangram::String->new();
171        $tstring->{name} = $tstring->{col} = 'guid';
172        # inject property into schema
173        #$schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields}->{string}->{$tstring->{name}} = $tstring;
174        print Dumper($schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields});
175      }
176    }
177    
178  sub connect {  sub connect {
179    
180      my $self = shift;      my $self = shift;
181            
182      my $dsn = shift;      my $dsn = shift;
183    
184    #print Dumper($self);
185    #exit;
186    
187        # TODO: re-enable
188      $dsn ||= $self->{locator}->{dbi}->{dsn};      $dsn ||= $self->{locator}->{dbi}->{dsn};
       
189      $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );      $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
190            
191      #my $storage = Tangram::Relational->connect( $schema, $dsn );      #my $storage = Tangram::Relational->connect( $schema, $dsn );
# Line 111  sub connect { Line 197  sub connect {
197  #      return;  #      return;
198  #    }  #    }
199    
200      return unless $self->_initSchema();      #return unless $self->_initSchema();
201        $self->_initSchema();
202    
203      # create the main tangram storage object      # create the main tangram storage object
204      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
205      $self->{COREHANDLE} = Tangram::Relational->connect( $self->{schema_tangram}, $dsn );      $self->{_COREHANDLE} = Tangram::Relational->connect( $schema_tangram, $dsn );
206    
207    #print "connect", "\n";
208    #my $core = $self->{_COREHANDLE};
209    #print Dumper($core);
210        
211      # some attempts for configuring the wrapped underlying dbi.....      # some attempts for configuring the wrapped underlying dbi.....
212      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
# Line 221  sub _configureUnderlyingStorage { Line 312  sub _configureUnderlyingStorage {
312    foreach my $key (keys %{$self->{dbi}}) {    foreach my $key (keys %{$self->{dbi}}) {
313      my $val = $self->{dbi}->{$key};      my $val = $self->{dbi}->{$key};
314      print "entry: $key; $val", "\n";      print "entry: $key; $val", "\n";
315      $self->{COREHANDLE}->{db}->{$key} = $val;      $self->{_COREHANDLE}->{db}->{$key} = $val;
316    }    }
317    #print Dumper($self->{COREHANDLE}->{db});    #print Dumper($self->{COREHANDLE}->{db});
318  }  }
# Line 234  sub configureCOREHANDLE { Line 325  sub configureCOREHANDLE {
325    $logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );    $logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );
326    
327    #my $subLayer = $self->_getSubLayerHandle();    #my $subLayer = $self->_getSubLayerHandle();
328      #print Dumper($self);
329      #exit;
330    
331    # apply configured modifications    # apply configured modifications
332      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
333        $self->{COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});        $self->{_COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});
334      }      }
335      if (exists $self->{dbi}->{RaiseError}) {      if (exists $self->{dbi}->{RaiseError}) {
336        $self->{COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};        $self->{_COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};
337      }      }
338      if (exists $self->{dbi}->{PrintError}) {      if (exists $self->{dbi}->{PrintError}) {
339        $self->{COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};        $self->{_COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};
340      }      }
341      if (exists $self->{dbi}->{HandleError}) {      if (exists $self->{dbi}->{HandleError}) {
342        $self->{COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};        $self->{_COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};
343      }      }
344    
345  }  }
# Line 262  sub deploySchema { Line 355  sub deploySchema {
355    my $ok;    my $ok;
356    if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {    if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
357      return unless $self->_initSchema();      return unless $self->_initSchema();
358      $ok = Tangram::Relational->deploy($self->{schema_tangram}, $dbh );      $ok = Tangram::Relational->deploy($schema_tangram, $dbh );
359      $dbh->disconnect();      $dbh->disconnect();
360    }    }
361    return $ok;    return $ok;
# Line 283  sub retreatSchema { Line 376  sub retreatSchema {
376      #use Data::Dumper; print Dumper($self);      #use Data::Dumper; print Dumper($self);
377      $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");      $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");
378            
379      $ok = Tangram::Relational->retreat($self->{schema_tangram}, $dbh );      $ok = Tangram::Relational->retreat($schema_tangram, $dbh );
380    
381      # answer "$ok=2" means "maybe" for now - we have to patch this to a constant here because...      # answer "$ok=2" means "maybe" for now - we have to patch this to a constant here because...
382      # - ... Tangram::Relational->retreat doesn't seem to return a valid status      # - ... Tangram::Relational->retreat doesn't seem to return a valid status
# Line 299  sub retreatSchema { Line 392  sub retreatSchema {
392    return $ok;    return $ok;
393  }  }
394    
395  sub rebuildDbAndSchema {  sub rebuildDb {
396    my $self = shift;    my $self = shift;
397    $logger->info( __PACKAGE__ . "->rebuildDbAndSchema()" );    $logger->info( __PACKAGE__ . "->rebuildDb()" );
398    my @results;    my @results;
399    
400    # sum up results (bool (0/1)) in array    # sum up results (bool (0/1)) in array
# Line 325  sub getListUnfiltered { Line 418  sub getListUnfiltered {
418    my @results;    my @results;
419    $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );    $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );
420    # get set of objects from odbms by object name    # get set of objects from odbms by object name
421    my $object_set = $self->{COREHANDLE}->remote($nodename);    my $object_set = $self->{_COREHANDLE}->remote($nodename);
422    @results = $self->{COREHANDLE}->select($object_set);    @results = $self->{_COREHANDLE}->select($object_set);
423    return \@results;    return \@results;
424  }  }
425    
# Line 341  sub getListFiltered { Line 434  sub getListFiltered {
434    my @results;    my @results;
435    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );
436    
437    #print Dumper($filters);  #print Dumper($filters);
438        
439    my @tfilters;    my @tfilters;
440        
# Line 371  sub getListFiltered { Line 464  sub getListFiltered {
464    my $tfilter = join(' & ', @tfilters);    my $tfilter = join(' & ', @tfilters);
465    
466    # get set of objects from odbms by object name    # get set of objects from odbms by object name
467    my $remote = $self->{COREHANDLE}->remote($nodename);    my $remote = $self->{_COREHANDLE}->remote($nodename);
468        
469    # was:    # was:
470    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);
471    
472    # is:    # is:
473    # HACK: build eval-string (sorry) to get filtered list - please give advice here    # HACK: build eval-string (sorry) to get filtered list - please give advice here
474    my $evalstring = 'return $self->{COREHANDLE}->select($remote, ' . $tfilter . ');';    my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';
475      
476      #print "eval: $evalstring", "\n";
477        
478    # get filtered list/set    # get filtered list/set
479    @results = eval($evalstring);    @results = eval($evalstring);
# Line 390  sub getListFiltered { Line 485  sub getListFiltered {
485  sub createCursor {  sub createCursor {
486    my $self = shift;    my $self = shift;
487    my $node = shift;    my $node = shift;
488    my $cmdHandle = $self->{COREHANDLE}->cursor($node);    my $cmdHandle = $self->{_COREHANDLE}->cursor($node);
489    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );
490    return $result;    return $result;
491  }  }
492    
493  sub createSet {  sub createSet {
494    my $self = shift;    my $self = shift;
495    #print "-" x 80, "\n";
496    #print Dumper(@_);
497    my @objects = @_;    my @objects = @_;
498    my $rh = Set::Object->new();    my $rh = Set::Object->new();
499    foreach (@objects) {    foreach (@objects) {
500      #print Dumper($_);      if (!isEmpty($_)) {
501      $rh->insert($_) if !isEmpty($_);  #print Dumper($_);
502          $rh->insert($_);
503        }
504    }    }
505    #print Dumper($rh->members());    #print Dumper($rh->members());
506    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
# Line 425  sub sendQuery { Line 524  sub sendQuery {
524      my $ident = $query->{criterias}->[0]->{val};      my $ident = $query->{criterias}->[0]->{val};
525  #print "load obj", "\n";  #print "load obj", "\n";
526      #return $self->createSet() if $ident == 5;      #return $self->createSet() if $ident == 5;
527      my $object = $self->{COREHANDLE}->load($ident);      $self->{_COREHANDLE}->unload($ident);
528        my $object = $self->{_COREHANDLE}->load($ident);
529  #print "get id", "\n";  #print "get id", "\n";
530      my $oid = $self->{COREHANDLE}->id($object);      my $oid = $self->{_COREHANDLE}->id($object);
531    #print Dumper($object);
532    #print "oid: $oid", "\n";
533      return $self->createSet($object);      return $self->createSet($object);
534      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );
535    }    }
536    
537    die("This should not be reached for now - redirect to \$self->getListFiltered() here!");    my $list = $self->getListFiltered($query->{node}, $query->{criterias});
538      #return $self->createSet($object);
539      #return $self->createSet($list);
540      return $self->createSet(@$list);
541    
542      #die("This should not be reached for now - redirect to \$self->getListFiltered() here!");
543    
544    
   # TODO: do a common tangram query here  
545    
546    
547      # try a generic tangram query here
548      # TODO: try to place an oql on top of that (search.cpan.org!)
549    my @crits;    my @crits;
550    foreach (@{$query->{criterias}}) {    foreach (@{$query->{criterias}}) {
551      my $op = '';      my $op = '';
# Line 456  sub sendQuery { Line 566  sub sendQuery {
566  sub eraseAll {  sub eraseAll {
567    my $self = shift;    my $self = shift;
568    my $classname = shift;    my $classname = shift;
569    my $remote = $self->{COREHANDLE}->remote($classname);    my $remote = $self->{_COREHANDLE}->remote($classname);
570    my @objs = $self->{COREHANDLE}->select($remote);    my @objs = $self->{_COREHANDLE}->select($remote);
571    $self->{COREHANDLE}->erase(@objs);    $self->{_COREHANDLE}->erase(@objs);
572  }  }
573    
574  sub createDb {  sub createDb {
# Line 470  sub createDb { Line 580  sub createDb {
580  sub getObject {  sub getObject {
581    my $self = shift;    my $self = shift;
582    my $oid = shift;    my $oid = shift;
583      my $options = shift;
584    
585      # TODO: create a deep_unload method (currently _all_ objects are unloaded)
586      # unload($oid) will only unload object, not deep object hashes
587      $self->{_COREHANDLE}->unload() if ($options->{destroy});
588    
589    # TODO: review this    # TODO: review this
590    #if (!$self->{COREHANDLE}) { return; }    #if (!$self->{COREHANDLE}) { return; }
591    return $self->{COREHANDLE}->load($oid);  
592      # TODO: review this
593      my $object = eval('$self->{_COREHANDLE}->load($oid);');
594      print $@, "\n" if $@;
595    
596      return $object if $object;
597    }
598    
599    sub getObjectByGuid {
600      my $self = shift;
601      my $guid = shift;
602      my $options = shift;
603      
604      # Guid and Classname is needed
605      if(!$guid || !$options->{classname}) {
606       $logger->error( __PACKAGE__ . "->getObjectByGuid: No 'guid' OR no Classname in options hash was given but needed!" );
607        return;
608      }
609      
610      # TODO: create a deep_unload method (currently _all_ objects are unloaded)
611      # unload($oid) will only unload object, not deep object hashes
612      $self->{_COREHANDLE}->unload() if ($options->{destroy});
613    
614      # search for object with given Classname and Guid
615      my $obj_tmp = $self->{_COREHANDLE}->remote($options->{classname});
616      my @result = $self->{_COREHANDLE}->select($obj_tmp, $obj_tmp->{guid} eq $guid);
617      
618      # we searched for global unique identifer of some object,
619      # so I think we can trust there would be only one result
620      if($result[0]) {
621        return $result[0];
622      } else {
623        $logger->error( __PACKAGE__ . "->getObjectByGuid: No Object with Classname $options->{classname} and GUID $guid found!" );
624        return;
625      }
626      
627  }  }
628    
629  sub getObjectAsHash {  sub getObjectAsHash {
630    my $self = shift;    my $self = shift;
631    my $oid = shift;    my $oid = shift;
632    my $options = shift;    my $options = shift;  
633    my $obj = $self->getObject($oid);    my $obj;
634    my $deref = var_deref($obj);    
635    var2utf8($deref) if ($options->{utf8});    if($options->{guid}) {
636    return $deref;      $obj = $self->getObjectByGuid($oid, $options);
637      } else {
638        $obj = $self->getObject($oid, $options);
639      }
640      
641      # build options (a callback to unload autovivified objects) for 'expand'
642      # TODO: use $logger to write to debug here!
643      my $cb; # = sub {};
644    =pod
645      if ($options->{destroy}) {
646        $options->{cb}->{destroy} = sub {
647          print "================ DESTROY", "\n";
648          my $object = shift;
649          #print Dumper($object);
650          $self->{_COREHANDLE}->unload($object);
651          #undef($object);
652        };
653      }
654    =cut
655    
656      my $hash = expand($obj, $options);
657      #$options->{cb}->{destroy}->($obj);
658      #$self->{_COREHANDLE}->unload($obj);
659      
660      # convert values in hash to utf8 to be ready for (e.g.) encapsulation in XML
661      # now done in expand
662      #var2utf8($hash) if ($options->{utf8});
663      
664      # old (wrong) attempts to get rid of used instances, if requested
665        #$obj->clear_refs;
666        #$self->{COREHANDLE}->unload($obj) if($options->{destroy});
667        #$obj->DESTROY;
668        #undef($obj) if($options->{destroy});
669      
670      return $hash;
671    }
672    
673    sub getSchema {
674      return $schema_tangram;
675    }
676    
677    sub getCOREHANDLE {
678      my $self = shift;
679      return $self->{_COREHANDLE};
680    }
681    
682    sub dropDb {
683      my $self = shift;
684      my $storage = $self->_getSubLayerHandle();
685      return $storage->dropDb();
686    }
687    
688    sub testAvailability {
689      my $self = shift;
690      my $storage = $self->_getSubLayerHandle();
691      return $storage->testAvailability();
692    }
693    
694    sub disconnect2 {
695      my $self = shift;
696      my $storage = $self->_getSubLayerHandle();
697      print "DISC!", "\n";
698    
699      my $storage_ll = $storage->{_COREHANDLE};
700      $storage_ll->disconnect();
701      
702      print Dumper($storage);
703      exit;
704      
705      #$self->{_COREHANDLE}
706      #$storage->disconnect();
707      $self->{dataStorageLayer}->disconnect();
708  }  }
709    
710  1;  1;
711    __END__
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