/[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 1.24 by joko, Sun Dec 22 14:13:01 2002 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.24  2002/12/22 14:13:01  joko
7    #  + sub dropDb
8    #
9    #  Revision 1.23  2002/12/19 16:31:53  joko
10    #  +- renamed sub to 'rebuildDb'
11    #
12    #  Revision 1.22  2002/12/18 22:28:16  jonen
13    #  + added extended logging at 'getObjectByGuid()'
14    #
15    #  Revision 1.21  2002/12/16 22:20:49  jonen
16    #  + fixed bug at 'getObjectByGuid()'
17    #
18    #  Revision 1.20  2002/12/16 20:49:17  jonen
19    #  + added sub 'getObjectByGuid()'
20    #  + added functionality to use 'getObjectByGuid' at 'getObjectAsHash()'
21    #
22    #  Revision 1.19  2002/12/16 06:46:09  joko
23    #  + attempt to introduce a generic '_patchSchema' - cancelled!
24    #
25    #  Revision 1.18  2002/12/13 21:48:07  joko
26    #  + fix to 'sub sendQuery'
27    #
28    #  Revision 1.17  2002/12/12 02:51:09  joko
29    #  + cosmetics
30    #
31    #  Revision 1.16  2002/12/11 06:54:10  joko
32    #  + fix: encapsulated object-loading inside an 'eval'
33    #
34    #  Revision 1.15  2002/12/05 13:55:21  joko
35    #  + now utilizing 'object2hash' instead of 'var_deref'
36    #  + played around with having fresh-objects - no progress....
37    #
38    #  Revision 1.14  2002/12/05 09:40:30  jonen
39    #  + added option->{destroy} at getObject for unloading all instance
40    #
41    #  Revision 1.13  2002/12/05 07:59:04  joko
42    #  + now using Tie::SecureHash as a base for the COREHANDLE
43    #  + former public COREHANDLE becomes private _COREHANDLE now
44    #  + sub getCOREHANDLE
45    #
46    #  Revision 1.12  2002/12/04 11:34:49  joko
47    #  - $schema_tangram doesn't have to be in class?
48    #
49    #  Revision 1.11  2002/12/04 08:54:08  jonen
50    #  + untested bugfix: undef($object) after transform to hash at getObjectAsHash
51    #
52  #  Revision 1.10  2002/12/03 15:53:23  joko  #  Revision 1.10  2002/12/03 15:53:23  joko
53  #  + small bugfix regarding object hierarchy  #  + small bugfix regarding object hierarchy
54  #  #
# Line 56  package Data::Storage::Handler::Tangram; Line 102  package Data::Storage::Handler::Tangram;
102  use strict;  use strict;
103  use warnings;  use warnings;
104    
105    use base ("Data::Storage::Handler");
106  use base ("Data::Storage::Handler::Abstract");  use base ("Data::Storage::Handler::Abstract");
107    
108  use Tangram;  use Tangram;
# Line 63  use Data::Dumper; Line 110  use Data::Dumper;
110  use libp qw( getNewPerlObjectByPkgName );  use libp qw( getNewPerlObjectByPkgName );
111  use Data::Storage::Result::Tangram;  use Data::Storage::Result::Tangram;
112  use Data::Compare::Struct qw( isEmpty );  use Data::Compare::Struct qw( isEmpty );
113  use Data::Transform::Deep qw( var_deref );  use Data::Transform::Deep qw( object2hash );
114  use Data::Transform::Encode qw( var2utf8 );  use Data::Transform::Encode qw( var2utf8 );
115    
116    
# Line 71  use Data::Transform::Encode qw( var2utf8 Line 118  use Data::Transform::Encode qw( var2utf8
118  my $logger = Log::Dispatch::Config->instance;  my $logger = Log::Dispatch::Config->instance;
119    
120    
121    # this holds the complete instantiated schema from tangram
122    my $schema_tangram;
123    
124  sub getMetaInfo {  sub getMetaInfo {
125    my $self = shift;    my $self = shift;
126    $logger->debug( __PACKAGE__ . "->getMetaInfo()"  );    $logger->debug( __PACKAGE__ . "->getMetaInfo()"  );
# Line 82  sub getMetaInfo { Line 132  sub getMetaInfo {
132  sub _initSchema {  sub _initSchema {
133    my $self = shift;    my $self = shift;
134    $logger->debug( __PACKAGE__ . "->_initSchema()" );    $logger->debug( __PACKAGE__ . "->_initSchema()" );
135    #if (!$self->{schema_tangram}) {    #if (!$schema_tangram) {
136      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} } );
137      $self->{schema_tangram} = $obj->getSchema();      $schema_tangram = $obj->getSchema();
138    #}    #}
139    if (!$self->{schema_tangram}) {    if (!$schema_tangram) {
140      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );
141      return 0;      return 0;
142    }    }
143      #$self->_patchSchema();
144    return 1;    return 1;
145  }  }
146    
147    sub _patchSchema {
148      my $self = shift;
149      foreach (keys %{$schema_tangram->{classes}}) {
150        next if $schema_tangram->{classes}->{$_}->{abstract};
151        #next if ($_ ne 'TsBankAccount');
152        #$_ ne 'AbstractAccount' &&
153        print "class: $_", "\n";
154    #print Dumper($schema_tangram->{classes}->{$_});
155        # create new string property named 'guid'
156        my $tstring = Tangram::String->new();
157        $tstring->{name} = $tstring->{col} = 'guid';
158        # inject property into schema
159        #$schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields}->{string}->{$tstring->{name}} = $tstring;
160        print Dumper($schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields});
161      }
162    }
163    
164  sub connect {  sub connect {
165    
166      my $self = shift;      my $self = shift;
# Line 115  sub connect { Line 183  sub connect {
183    
184      # create the main tangram storage object      # create the main tangram storage object
185      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
186      $self->{COREHANDLE} = Tangram::Relational->connect( $self->{schema_tangram}, $dsn );      $self->{_COREHANDLE} = Tangram::Relational->connect( $schema_tangram, $dsn );
187    
188    #print "connect", "\n";
189    #my $core = $self->{_COREHANDLE};
190    #print Dumper($core);
191        
192      # some attempts for configuring the wrapped underlying dbi.....      # some attempts for configuring the wrapped underlying dbi.....
193      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
# Line 221  sub _configureUnderlyingStorage { Line 293  sub _configureUnderlyingStorage {
293    foreach my $key (keys %{$self->{dbi}}) {    foreach my $key (keys %{$self->{dbi}}) {
294      my $val = $self->{dbi}->{$key};      my $val = $self->{dbi}->{$key};
295      print "entry: $key; $val", "\n";      print "entry: $key; $val", "\n";
296      $self->{COREHANDLE}->{db}->{$key} = $val;      $self->{_COREHANDLE}->{db}->{$key} = $val;
297    }    }
298    #print Dumper($self->{COREHANDLE}->{db});    #print Dumper($self->{COREHANDLE}->{db});
299  }  }
# Line 237  sub configureCOREHANDLE { Line 309  sub configureCOREHANDLE {
309    
310    # apply configured modifications    # apply configured modifications
311      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
312        $self->{COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});        $self->{_COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});
313      }      }
314      if (exists $self->{dbi}->{RaiseError}) {      if (exists $self->{dbi}->{RaiseError}) {
315        $self->{COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};        $self->{_COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};
316      }      }
317      if (exists $self->{dbi}->{PrintError}) {      if (exists $self->{dbi}->{PrintError}) {
318        $self->{COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};        $self->{_COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};
319      }      }
320      if (exists $self->{dbi}->{HandleError}) {      if (exists $self->{dbi}->{HandleError}) {
321        $self->{COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};        $self->{_COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};
322      }      }
323    
324  }  }
# Line 262  sub deploySchema { Line 334  sub deploySchema {
334    my $ok;    my $ok;
335    if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {    if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
336      return unless $self->_initSchema();      return unless $self->_initSchema();
337      $ok = Tangram::Relational->deploy($self->{schema_tangram}, $dbh );      $ok = Tangram::Relational->deploy($schema_tangram, $dbh );
338      $dbh->disconnect();      $dbh->disconnect();
339    }    }
340    return $ok;    return $ok;
# Line 283  sub retreatSchema { Line 355  sub retreatSchema {
355      #use Data::Dumper; print Dumper($self);      #use Data::Dumper; print Dumper($self);
356      $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");      $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");
357            
358      $ok = Tangram::Relational->retreat($self->{schema_tangram}, $dbh );      $ok = Tangram::Relational->retreat($schema_tangram, $dbh );
359    
360      # answer "$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...
361      # - ... 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 371  sub retreatSchema {
371    return $ok;    return $ok;
372  }  }
373    
374  sub rebuildDbAndSchema {  sub rebuildDb {
375    my $self = shift;    my $self = shift;
376    $logger->info( __PACKAGE__ . "->rebuildDbAndSchema()" );    $logger->info( __PACKAGE__ . "->rebuildDb()" );
377    my @results;    my @results;
378    
379    # sum up results (bool (0/1)) in array    # sum up results (bool (0/1)) in array
# Line 325  sub getListUnfiltered { Line 397  sub getListUnfiltered {
397    my @results;    my @results;
398    $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );    $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );
399    # get set of objects from odbms by object name    # get set of objects from odbms by object name
400    my $object_set = $self->{COREHANDLE}->remote($nodename);    my $object_set = $self->{_COREHANDLE}->remote($nodename);
401    @results = $self->{COREHANDLE}->select($object_set);    @results = $self->{_COREHANDLE}->select($object_set);
402    return \@results;    return \@results;
403  }  }
404    
# Line 371  sub getListFiltered { Line 443  sub getListFiltered {
443    my $tfilter = join(' & ', @tfilters);    my $tfilter = join(' & ', @tfilters);
444    
445    # get set of objects from odbms by object name    # get set of objects from odbms by object name
446    my $remote = $self->{COREHANDLE}->remote($nodename);    my $remote = $self->{_COREHANDLE}->remote($nodename);
447        
448    # was:    # was:
449    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);
450    
451    # is:    # is:
452    # 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
453    my $evalstring = 'return $self->{COREHANDLE}->select($remote, ' . $tfilter . ');';    my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';
454        
455    # get filtered list/set    # get filtered list/set
456    @results = eval($evalstring);    @results = eval($evalstring);
# Line 390  sub getListFiltered { Line 462  sub getListFiltered {
462  sub createCursor {  sub createCursor {
463    my $self = shift;    my $self = shift;
464    my $node = shift;    my $node = shift;
465    my $cmdHandle = $self->{COREHANDLE}->cursor($node);    my $cmdHandle = $self->{_COREHANDLE}->cursor($node);
466    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );
467    return $result;    return $result;
468  }  }
469    
470  sub createSet {  sub createSet {
471    my $self = shift;    my $self = shift;
472    #print "-" x 80, "\n";
473    #print Dumper(@_);
474    my @objects = @_;    my @objects = @_;
475    my $rh = Set::Object->new();    my $rh = Set::Object->new();
476    foreach (@objects) {    foreach (@objects) {
477      #print Dumper($_);      if (!isEmpty($_)) {
478      $rh->insert($_) if !isEmpty($_);  #print Dumper($_);
479          $rh->insert($_);
480        }
481    }    }
482    #print Dumper($rh->members());    #print Dumper($rh->members());
483    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
# Line 425  sub sendQuery { Line 501  sub sendQuery {
501      my $ident = $query->{criterias}->[0]->{val};      my $ident = $query->{criterias}->[0]->{val};
502  #print "load obj", "\n";  #print "load obj", "\n";
503      #return $self->createSet() if $ident == 5;      #return $self->createSet() if $ident == 5;
504      my $object = $self->{COREHANDLE}->load($ident);      $self->{_COREHANDLE}->unload($ident);
505        my $object = $self->{_COREHANDLE}->load($ident);
506  #print "get id", "\n";  #print "get id", "\n";
507      my $oid = $self->{COREHANDLE}->id($object);      my $oid = $self->{_COREHANDLE}->id($object);
508    #print Dumper($object);
509    #print "oid: $oid", "\n";
510      return $self->createSet($object);      return $self->createSet($object);
511      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );
512    }    }
# Line 456  sub sendQuery { Line 535  sub sendQuery {
535  sub eraseAll {  sub eraseAll {
536    my $self = shift;    my $self = shift;
537    my $classname = shift;    my $classname = shift;
538    my $remote = $self->{COREHANDLE}->remote($classname);    my $remote = $self->{_COREHANDLE}->remote($classname);
539    my @objs = $self->{COREHANDLE}->select($remote);    my @objs = $self->{_COREHANDLE}->select($remote);
540    $self->{COREHANDLE}->erase(@objs);    $self->{_COREHANDLE}->erase(@objs);
541  }  }
542    
543  sub createDb {  sub createDb {
# Line 470  sub createDb { Line 549  sub createDb {
549  sub getObject {  sub getObject {
550    my $self = shift;    my $self = shift;
551    my $oid = shift;    my $oid = shift;
552      my $options = shift;
553    
554      # TODO: create a deep_unload method (currently _all_ objects are unloaded)
555      # unload($oid) will only unload object, not deep object hashes
556      $self->{_COREHANDLE}->unload() if ($options->{destroy});
557    
558    # TODO: review this    # TODO: review this
559    #if (!$self->{COREHANDLE}) { return; }    #if (!$self->{COREHANDLE}) { return; }
560    return $self->{COREHANDLE}->load($oid);  
561      # TODO: review this
562      my $object = eval('$self->{_COREHANDLE}->load($oid);');
563      print $@, "\n" if $@;
564    
565      return $object if $object;
566    }
567    
568    sub getObjectByGuid {
569      my $self = shift;
570      my $guid = shift;
571      my $options = shift;
572      
573      # Guid and Classname is needed
574      if(!$guid || !$options->{classname}) {
575       $logger->error( __PACKAGE__ . "->getObjectByGuid: No 'guid' OR no Classname in options hash was given but needed!" );
576        return;
577      }
578      
579      # TODO: create a deep_unload method (currently _all_ objects are unloaded)
580      # unload($oid) will only unload object, not deep object hashes
581      $self->{_COREHANDLE}->unload() if ($options->{destroy});
582    
583      # search for object with given Classname and Guid
584      my $obj_tmp = $self->{_COREHANDLE}->remote($options->{classname});
585      my @result = $self->{_COREHANDLE}->select($obj_tmp, $obj_tmp->{guid} eq $guid);
586      
587      # we searched for global unique identifer of some object,
588      # so I think we can trust there would be only one result
589      if($result[0]) {
590        return $result[0];
591      } else {
592        $logger->error( __PACKAGE__ . "->getObjectByGuid: No Object with Classname $options->{classname} and GUID $guid found!" );
593        return;
594      }
595      
596  }  }
597    
598  sub getObjectAsHash {  sub getObjectAsHash {
599    my $self = shift;    my $self = shift;
600    my $oid = shift;    my $oid = shift;
601    my $options = shift;    my $options = shift;  
602    my $obj = $self->getObject($oid);    my $obj;
603    my $deref = var_deref($obj);    
604    var2utf8($deref) if ($options->{utf8});    if($options->{guid}) {
605    return $deref;      $obj = $self->getObjectByGuid($oid, $options);
606      } else {
607        $obj = $self->getObject($oid, $options);
608      }
609      
610      # build options (a callback to unload autovivified objects) for 'expand'
611      # TODO: use $logger to write to debug here!
612      my $cb; # = sub {};
613    =pod
614      if ($options->{destroy}) {
615        $options->{cb}->{destroy} = sub {
616          print "================ DESTROY", "\n";
617          my $object = shift;
618          #print Dumper($object);
619          $self->{_COREHANDLE}->unload($object);
620          #undef($object);
621        };
622      }
623    =cut
624    
625      my $hash = object2hash($obj, $options);
626      #$options->{cb}->{destroy}->($obj);
627      #$self->{_COREHANDLE}->unload($obj);
628      
629      # convert values in hash to utf8 to be ready for (e.g.) encapsulation in XML
630      # now done in object2hash
631      #var2utf8($hash) if ($options->{utf8});
632      
633      # old (wrong) attempts to get rid of used instances, if requested
634        #$obj->clear_refs;
635        #$self->{COREHANDLE}->unload($obj) if($options->{destroy});
636        #$obj->DESTROY;
637        #undef($obj) if($options->{destroy});
638      
639      return $hash;
640    }
641    
642    sub getSchema {
643      return $schema_tangram;
644    }
645    
646    sub getCOREHANDLE {
647      my $self = shift;
648      return $self->{_COREHANDLE};
649    }
650    
651    sub dropDb {
652      my $self = shift;
653      my $storage = $self->_getSubLayerHandle();
654      return $storage->dropDb();
655  }  }
656    
657  1;  1;
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