/[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 1.27 by joko, Fri Jan 31 06:30:59 2003 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.27  2003/01/31 06:30:59  joko
7    #  + enabled 'sendQuery'
8    #
9    #  Revision 1.26  2003/01/30 22:29:47  joko
10    #  + fixed module usage (removed dependency on 'libp.pm')
11    #
12    #  Revision 1.25  2003/01/19 02:30:05  joko
13    #  + fix: modified call to '_initSchema'
14    #
15    #  Revision 1.24  2002/12/22 14:13:01  joko
16    #  + sub dropDb
17    #
18    #  Revision 1.23  2002/12/19 16:31:53  joko
19    #  +- renamed sub to 'rebuildDb'
20    #
21    #  Revision 1.22  2002/12/18 22:28:16  jonen
22    #  + added extended logging at 'getObjectByGuid()'
23    #
24    #  Revision 1.21  2002/12/16 22:20:49  jonen
25    #  + fixed bug at 'getObjectByGuid()'
26    #
27    #  Revision 1.20  2002/12/16 20:49:17  jonen
28    #  + added sub 'getObjectByGuid()'
29    #  + added functionality to use 'getObjectByGuid' at 'getObjectAsHash()'
30    #
31    #  Revision 1.19  2002/12/16 06:46:09  joko
32    #  + attempt to introduce a generic '_patchSchema' - cancelled!
33    #
34    #  Revision 1.18  2002/12/13 21:48:07  joko
35    #  + fix to 'sub sendQuery'
36    #
37    #  Revision 1.17  2002/12/12 02:51:09  joko
38    #  + cosmetics
39    #
40    #  Revision 1.16  2002/12/11 06:54:10  joko
41    #  + fix: encapsulated object-loading inside an 'eval'
42    #
43    #  Revision 1.15  2002/12/05 13:55:21  joko
44    #  + now utilizing 'object2hash' instead of 'var_deref'
45    #  + played around with having fresh-objects - no progress....
46    #
47    #  Revision 1.14  2002/12/05 09:40:30  jonen
48    #  + added option->{destroy} at getObject for unloading all instance
49    #
50    #  Revision 1.13  2002/12/05 07:59:04  joko
51    #  + now using Tie::SecureHash as a base for the COREHANDLE
52    #  + former public COREHANDLE becomes private _COREHANDLE now
53    #  + sub getCOREHANDLE
54    #
55    #  Revision 1.12  2002/12/04 11:34:49  joko
56    #  - $schema_tangram doesn't have to be in class?
57    #
58    #  Revision 1.11  2002/12/04 08:54:08  jonen
59    #  + untested bugfix: undef($object) after transform to hash at getObjectAsHash
60    #
61  #  Revision 1.10  2002/12/03 15:53:23  joko  #  Revision 1.10  2002/12/03 15:53:23  joko
62  #  + small bugfix regarding object hierarchy  #  + small bugfix regarding object hierarchy
63  #  #
# Line 56  package Data::Storage::Handler::Tangram; Line 111  package Data::Storage::Handler::Tangram;
111  use strict;  use strict;
112  use warnings;  use warnings;
113    
114    use base ("Data::Storage::Handler");
115  use base ("Data::Storage::Handler::Abstract");  use base ("Data::Storage::Handler::Abstract");
116    
117  use Tangram;  use Tangram;
118  use Data::Dumper;  use Data::Dumper;
119  use libp qw( getNewPerlObjectByPkgName );  use DesignPattern::Object;
120  use Data::Storage::Result::Tangram;  use Data::Storage::Result::Tangram;
121  use Data::Compare::Struct qw( isEmpty );  use Data::Compare::Struct qw( isEmpty );
122  use Data::Transform::Deep qw( var_deref );  use Data::Transform::Deep qw( object2hash );
123  use Data::Transform::Encode qw( var2utf8 );  use Data::Transform::Encode qw( var2utf8 );
124    
   
125  # get logger instance  # get logger instance
126  my $logger = Log::Dispatch::Config->instance;  my $logger = Log::Dispatch::Config->instance;
127    
128    
129    # this holds the complete instantiated schema from tangram
130    my $schema_tangram;
131    
132  sub getMetaInfo {  sub getMetaInfo {
133    my $self = shift;    my $self = shift;
134    $logger->debug( __PACKAGE__ . "->getMetaInfo()"  );    $logger->debug( __PACKAGE__ . "->getMetaInfo()"  );
# Line 82  sub getMetaInfo { Line 140  sub getMetaInfo {
140  sub _initSchema {  sub _initSchema {
141    my $self = shift;    my $self = shift;
142    $logger->debug( __PACKAGE__ . "->_initSchema()" );    $logger->debug( __PACKAGE__ . "->_initSchema()" );
143    #if (!$self->{schema_tangram}) {    #if (!$schema_tangram) {
144      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} } );
145      $self->{schema_tangram} = $obj->getSchema();      my $obj = DesignPattern::Object->fromPackage($self->{locator}->{schema}, { 'EXPORT_OBJECTS' => $self->{locator}->{classnames}, 'want_transactions' => $self->{locator}->{want_transactions} } );
146        $schema_tangram = $obj->getSchema();
147    #}    #}
148    if (!$self->{schema_tangram}) {    if (!$schema_tangram) {
149      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );
150      return 0;      return 0;
151    }    }
152      #$self->_patchSchema();
153    return 1;    return 1;
154  }  }
155    
156    sub _patchSchema {
157      my $self = shift;
158      foreach (keys %{$schema_tangram->{classes}}) {
159        next if $schema_tangram->{classes}->{$_}->{abstract};
160        #next if ($_ ne 'TsBankAccount');
161        #$_ ne 'AbstractAccount' &&
162        print "class: $_", "\n";
163    #print Dumper($schema_tangram->{classes}->{$_});
164        # create new string property named 'guid'
165        my $tstring = Tangram::String->new();
166        $tstring->{name} = $tstring->{col} = 'guid';
167        # inject property into schema
168        #$schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields}->{string}->{$tstring->{name}} = $tstring;
169        print Dumper($schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields});
170      }
171    }
172    
173  sub connect {  sub connect {
174    
175      my $self = shift;      my $self = shift;
176            
177      my $dsn = shift;      my $dsn = shift;
178    
179    #print Dumper($self);
180    #exit;
181    
182        # TODO: re-enable
183      $dsn ||= $self->{locator}->{dbi}->{dsn};      $dsn ||= $self->{locator}->{dbi}->{dsn};
       
184      $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );      $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
185            
186      #my $storage = Tangram::Relational->connect( $schema, $dsn );      #my $storage = Tangram::Relational->connect( $schema, $dsn );
# Line 111  sub connect { Line 192  sub connect {
192  #      return;  #      return;
193  #    }  #    }
194    
195      return unless $self->_initSchema();      #return unless $self->_initSchema();
196        $self->_initSchema();
197    
198      # create the main tangram storage object      # create the main tangram storage object
199      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
200      $self->{COREHANDLE} = Tangram::Relational->connect( $self->{schema_tangram}, $dsn );      $self->{_COREHANDLE} = Tangram::Relational->connect( $schema_tangram, $dsn );
201    
202    #print "connect", "\n";
203    #my $core = $self->{_COREHANDLE};
204    #print Dumper($core);
205        
206      # some attempts for configuring the wrapped underlying dbi.....      # some attempts for configuring the wrapped underlying dbi.....
207      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
# Line 221  sub _configureUnderlyingStorage { Line 307  sub _configureUnderlyingStorage {
307    foreach my $key (keys %{$self->{dbi}}) {    foreach my $key (keys %{$self->{dbi}}) {
308      my $val = $self->{dbi}->{$key};      my $val = $self->{dbi}->{$key};
309      print "entry: $key; $val", "\n";      print "entry: $key; $val", "\n";
310      $self->{COREHANDLE}->{db}->{$key} = $val;      $self->{_COREHANDLE}->{db}->{$key} = $val;
311    }    }
312    #print Dumper($self->{COREHANDLE}->{db});    #print Dumper($self->{COREHANDLE}->{db});
313  }  }
# Line 234  sub configureCOREHANDLE { Line 320  sub configureCOREHANDLE {
320    $logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );    $logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );
321    
322    #my $subLayer = $self->_getSubLayerHandle();    #my $subLayer = $self->_getSubLayerHandle();
323      #print Dumper($self);
324      #exit;
325    
326    # apply configured modifications    # apply configured modifications
327      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
328        $self->{COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});        $self->{_COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});
329      }      }
330      if (exists $self->{dbi}->{RaiseError}) {      if (exists $self->{dbi}->{RaiseError}) {
331        $self->{COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};        $self->{_COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};
332      }      }
333      if (exists $self->{dbi}->{PrintError}) {      if (exists $self->{dbi}->{PrintError}) {
334        $self->{COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};        $self->{_COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};
335      }      }
336      if (exists $self->{dbi}->{HandleError}) {      if (exists $self->{dbi}->{HandleError}) {
337        $self->{COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};        $self->{_COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};
338      }      }
339    
340  }  }
# Line 262  sub deploySchema { Line 350  sub deploySchema {
350    my $ok;    my $ok;
351    if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {    if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
352      return unless $self->_initSchema();      return unless $self->_initSchema();
353      $ok = Tangram::Relational->deploy($self->{schema_tangram}, $dbh );      $ok = Tangram::Relational->deploy($schema_tangram, $dbh );
354      $dbh->disconnect();      $dbh->disconnect();
355    }    }
356    return $ok;    return $ok;
# Line 283  sub retreatSchema { Line 371  sub retreatSchema {
371      #use Data::Dumper; print Dumper($self);      #use Data::Dumper; print Dumper($self);
372      $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");      $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");
373            
374      $ok = Tangram::Relational->retreat($self->{schema_tangram}, $dbh );      $ok = Tangram::Relational->retreat($schema_tangram, $dbh );
375    
376      # answer "$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...
377      # - ... 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 387  sub retreatSchema {
387    return $ok;    return $ok;
388  }  }
389    
390  sub rebuildDbAndSchema {  sub rebuildDb {
391    my $self = shift;    my $self = shift;
392    $logger->info( __PACKAGE__ . "->rebuildDbAndSchema()" );    $logger->info( __PACKAGE__ . "->rebuildDb()" );
393    my @results;    my @results;
394    
395    # sum up results (bool (0/1)) in array    # sum up results (bool (0/1)) in array
# Line 325  sub getListUnfiltered { Line 413  sub getListUnfiltered {
413    my @results;    my @results;
414    $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );    $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );
415    # get set of objects from odbms by object name    # get set of objects from odbms by object name
416    my $object_set = $self->{COREHANDLE}->remote($nodename);    my $object_set = $self->{_COREHANDLE}->remote($nodename);
417    @results = $self->{COREHANDLE}->select($object_set);    @results = $self->{_COREHANDLE}->select($object_set);
418    return \@results;    return \@results;
419  }  }
420    
# Line 341  sub getListFiltered { Line 429  sub getListFiltered {
429    my @results;    my @results;
430    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );
431    
432    #print Dumper($filters);  #print Dumper($filters);
433        
434    my @tfilters;    my @tfilters;
435        
# Line 371  sub getListFiltered { Line 459  sub getListFiltered {
459    my $tfilter = join(' & ', @tfilters);    my $tfilter = join(' & ', @tfilters);
460    
461    # get set of objects from odbms by object name    # get set of objects from odbms by object name
462    my $remote = $self->{COREHANDLE}->remote($nodename);    my $remote = $self->{_COREHANDLE}->remote($nodename);
463        
464    # was:    # was:
465    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);
466    
467    # is:    # is:
468    # 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
469    my $evalstring = 'return $self->{COREHANDLE}->select($remote, ' . $tfilter . ');';    my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';
470      
471      #print "eval: $evalstring", "\n";
472        
473    # get filtered list/set    # get filtered list/set
474    @results = eval($evalstring);    @results = eval($evalstring);
# Line 390  sub getListFiltered { Line 480  sub getListFiltered {
480  sub createCursor {  sub createCursor {
481    my $self = shift;    my $self = shift;
482    my $node = shift;    my $node = shift;
483    my $cmdHandle = $self->{COREHANDLE}->cursor($node);    my $cmdHandle = $self->{_COREHANDLE}->cursor($node);
484    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );
485    return $result;    return $result;
486  }  }
487    
488  sub createSet {  sub createSet {
489    my $self = shift;    my $self = shift;
490    #print "-" x 80, "\n";
491    #print Dumper(@_);
492    my @objects = @_;    my @objects = @_;
493    my $rh = Set::Object->new();    my $rh = Set::Object->new();
494    foreach (@objects) {    foreach (@objects) {
495      #print Dumper($_);      if (!isEmpty($_)) {
496      $rh->insert($_) if !isEmpty($_);  #print Dumper($_);
497          $rh->insert($_);
498        }
499    }    }
500    #print Dumper($rh->members());    #print Dumper($rh->members());
501    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
# Line 425  sub sendQuery { Line 519  sub sendQuery {
519      my $ident = $query->{criterias}->[0]->{val};      my $ident = $query->{criterias}->[0]->{val};
520  #print "load obj", "\n";  #print "load obj", "\n";
521      #return $self->createSet() if $ident == 5;      #return $self->createSet() if $ident == 5;
522      my $object = $self->{COREHANDLE}->load($ident);      $self->{_COREHANDLE}->unload($ident);
523        my $object = $self->{_COREHANDLE}->load($ident);
524  #print "get id", "\n";  #print "get id", "\n";
525      my $oid = $self->{COREHANDLE}->id($object);      my $oid = $self->{_COREHANDLE}->id($object);
526    #print Dumper($object);
527    #print "oid: $oid", "\n";
528      return $self->createSet($object);      return $self->createSet($object);
529      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );
530    }    }
531    
532    die("This should not be reached for now - redirect to \$self->getListFiltered() here!");    my $list = $self->getListFiltered($query->{node}, $query->{criterias});
533      #return $self->createSet($object);
534      #return $self->createSet($list);
535      return $self->createSet(@$list);
536    
537      #die("This should not be reached for now - redirect to \$self->getListFiltered() here!");
538    
   # TODO: do a common tangram query here  
539    
540    
541    
542      # try a generic tangram query here
543      # TODO: try to place an oql on top of that (search.cpan.org!)
544    my @crits;    my @crits;
545    foreach (@{$query->{criterias}}) {    foreach (@{$query->{criterias}}) {
546      my $op = '';      my $op = '';
# Line 456  sub sendQuery { Line 561  sub sendQuery {
561  sub eraseAll {  sub eraseAll {
562    my $self = shift;    my $self = shift;
563    my $classname = shift;    my $classname = shift;
564    my $remote = $self->{COREHANDLE}->remote($classname);    my $remote = $self->{_COREHANDLE}->remote($classname);
565    my @objs = $self->{COREHANDLE}->select($remote);    my @objs = $self->{_COREHANDLE}->select($remote);
566    $self->{COREHANDLE}->erase(@objs);    $self->{_COREHANDLE}->erase(@objs);
567  }  }
568    
569  sub createDb {  sub createDb {
# Line 470  sub createDb { Line 575  sub createDb {
575  sub getObject {  sub getObject {
576    my $self = shift;    my $self = shift;
577    my $oid = shift;    my $oid = shift;
578      my $options = shift;
579    
580      # TODO: create a deep_unload method (currently _all_ objects are unloaded)
581      # unload($oid) will only unload object, not deep object hashes
582      $self->{_COREHANDLE}->unload() if ($options->{destroy});
583    
584    # TODO: review this    # TODO: review this
585    #if (!$self->{COREHANDLE}) { return; }    #if (!$self->{COREHANDLE}) { return; }
586    return $self->{COREHANDLE}->load($oid);  
587      # TODO: review this
588      my $object = eval('$self->{_COREHANDLE}->load($oid);');
589      print $@, "\n" if $@;
590    
591      return $object if $object;
592    }
593    
594    sub getObjectByGuid {
595      my $self = shift;
596      my $guid = shift;
597      my $options = shift;
598      
599      # Guid and Classname is needed
600      if(!$guid || !$options->{classname}) {
601       $logger->error( __PACKAGE__ . "->getObjectByGuid: No 'guid' OR no Classname in options hash was given but needed!" );
602        return;
603      }
604      
605      # TODO: create a deep_unload method (currently _all_ objects are unloaded)
606      # unload($oid) will only unload object, not deep object hashes
607      $self->{_COREHANDLE}->unload() if ($options->{destroy});
608    
609      # search for object with given Classname and Guid
610      my $obj_tmp = $self->{_COREHANDLE}->remote($options->{classname});
611      my @result = $self->{_COREHANDLE}->select($obj_tmp, $obj_tmp->{guid} eq $guid);
612      
613      # we searched for global unique identifer of some object,
614      # so I think we can trust there would be only one result
615      if($result[0]) {
616        return $result[0];
617      } else {
618        $logger->error( __PACKAGE__ . "->getObjectByGuid: No Object with Classname $options->{classname} and GUID $guid found!" );
619        return;
620      }
621      
622  }  }
623    
624  sub getObjectAsHash {  sub getObjectAsHash {
625    my $self = shift;    my $self = shift;
626    my $oid = shift;    my $oid = shift;
627    my $options = shift;    my $options = shift;  
628    my $obj = $self->getObject($oid);    my $obj;
629    my $deref = var_deref($obj);    
630    var2utf8($deref) if ($options->{utf8});    if($options->{guid}) {
631    return $deref;      $obj = $self->getObjectByGuid($oid, $options);
632      } else {
633        $obj = $self->getObject($oid, $options);
634      }
635      
636      # build options (a callback to unload autovivified objects) for 'expand'
637      # TODO: use $logger to write to debug here!
638      my $cb; # = sub {};
639    =pod
640      if ($options->{destroy}) {
641        $options->{cb}->{destroy} = sub {
642          print "================ DESTROY", "\n";
643          my $object = shift;
644          #print Dumper($object);
645          $self->{_COREHANDLE}->unload($object);
646          #undef($object);
647        };
648      }
649    =cut
650    
651      my $hash = object2hash($obj, $options);
652      #$options->{cb}->{destroy}->($obj);
653      #$self->{_COREHANDLE}->unload($obj);
654      
655      # convert values in hash to utf8 to be ready for (e.g.) encapsulation in XML
656      # now done in object2hash
657      #var2utf8($hash) if ($options->{utf8});
658      
659      # old (wrong) attempts to get rid of used instances, if requested
660        #$obj->clear_refs;
661        #$self->{COREHANDLE}->unload($obj) if($options->{destroy});
662        #$obj->DESTROY;
663        #undef($obj) if($options->{destroy});
664      
665      return $hash;
666    }
667    
668    sub getSchema {
669      return $schema_tangram;
670    }
671    
672    sub getCOREHANDLE {
673      my $self = shift;
674      return $self->{_COREHANDLE};
675    }
676    
677    sub dropDb {
678      my $self = shift;
679      my $storage = $self->_getSubLayerHandle();
680      return $storage->dropDb();
681    }
682    
683    sub testAvailability {
684      my $self = shift;
685      my $storage = $self->_getSubLayerHandle();
686      return $storage->testAvailability();
687  }  }
688    
689  1;  1;
690    __END__
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