/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.12 by joko, Wed Dec 4 11:34:49 2002 UTC revision 1.16 by joko, Wed Dec 11 06:54:10 2002 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.16  2002/12/11 06:54:10  joko
7    #  + fix: encapsulated object-loading inside an 'eval'
8    #
9    #  Revision 1.15  2002/12/05 13:55:21  joko
10    #  + now utilizing 'object2hash' instead of 'var_deref'
11    #  + played around with having fresh-objects - no progress....
12    #
13    #  Revision 1.14  2002/12/05 09:40:30  jonen
14    #  + added option->{destroy} at getObject for unloading all instance
15    #
16    #  Revision 1.13  2002/12/05 07:59:04  joko
17    #  + now using Tie::SecureHash as a base for the COREHANDLE
18    #  + former public COREHANDLE becomes private _COREHANDLE now
19    #  + sub getCOREHANDLE
20    #
21  #  Revision 1.12  2002/12/04 11:34:49  joko  #  Revision 1.12  2002/12/04 11:34:49  joko
22  #  - $schema_tangram doesn't have to be in class?  #  - $schema_tangram doesn't have to be in class?
23  #  #
# Line 62  package Data::Storage::Handler::Tangram; Line 77  package Data::Storage::Handler::Tangram;
77  use strict;  use strict;
78  use warnings;  use warnings;
79    
80    use base ("Data::Storage::Handler");
81  use base ("Data::Storage::Handler::Abstract");  use base ("Data::Storage::Handler::Abstract");
82    
83  use Tangram;  use Tangram;
# Line 69  use Data::Dumper; Line 85  use Data::Dumper;
85  use libp qw( getNewPerlObjectByPkgName );  use libp qw( getNewPerlObjectByPkgName );
86  use Data::Storage::Result::Tangram;  use Data::Storage::Result::Tangram;
87  use Data::Compare::Struct qw( isEmpty );  use Data::Compare::Struct qw( isEmpty );
88  use Data::Transform::Deep qw( var_deref );  use Data::Transform::Deep qw( object2hash );
89  use Data::Transform::Encode qw( var2utf8 );  use Data::Transform::Encode qw( var2utf8 );
90    
91    
# Line 124  sub connect { Line 140  sub connect {
140    
141      # create the main tangram storage object      # create the main tangram storage object
142      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
143      $self->{COREHANDLE} = Tangram::Relational->connect( $schema_tangram, $dsn );      $self->{_COREHANDLE} = Tangram::Relational->connect( $schema_tangram, $dsn );
144    
145    #print "connect", "\n";
146    #my $core = $self->{_COREHANDLE};
147    #print Dumper($core);
148        
149      # some attempts for configuring the wrapped underlying dbi.....      # some attempts for configuring the wrapped underlying dbi.....
150      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
# Line 230  sub _configureUnderlyingStorage { Line 250  sub _configureUnderlyingStorage {
250    foreach my $key (keys %{$self->{dbi}}) {    foreach my $key (keys %{$self->{dbi}}) {
251      my $val = $self->{dbi}->{$key};      my $val = $self->{dbi}->{$key};
252      print "entry: $key; $val", "\n";      print "entry: $key; $val", "\n";
253      $self->{COREHANDLE}->{db}->{$key} = $val;      $self->{_COREHANDLE}->{db}->{$key} = $val;
254    }    }
255    #print Dumper($self->{COREHANDLE}->{db});    #print Dumper($self->{COREHANDLE}->{db});
256  }  }
# Line 246  sub configureCOREHANDLE { Line 266  sub configureCOREHANDLE {
266    
267    # apply configured modifications    # apply configured modifications
268      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
269        $self->{COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});        $self->{_COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});
270      }      }
271      if (exists $self->{dbi}->{RaiseError}) {      if (exists $self->{dbi}->{RaiseError}) {
272        $self->{COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};        $self->{_COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};
273      }      }
274      if (exists $self->{dbi}->{PrintError}) {      if (exists $self->{dbi}->{PrintError}) {
275        $self->{COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};        $self->{_COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};
276      }      }
277      if (exists $self->{dbi}->{HandleError}) {      if (exists $self->{dbi}->{HandleError}) {
278        $self->{COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};        $self->{_COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};
279      }      }
280    
281  }  }
# Line 334  sub getListUnfiltered { Line 354  sub getListUnfiltered {
354    my @results;    my @results;
355    $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );    $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );
356    # get set of objects from odbms by object name    # get set of objects from odbms by object name
357    my $object_set = $self->{COREHANDLE}->remote($nodename);    my $object_set = $self->{_COREHANDLE}->remote($nodename);
358    @results = $self->{COREHANDLE}->select($object_set);    @results = $self->{_COREHANDLE}->select($object_set);
359    return \@results;    return \@results;
360  }  }
361    
# Line 380  sub getListFiltered { Line 400  sub getListFiltered {
400    my $tfilter = join(' & ', @tfilters);    my $tfilter = join(' & ', @tfilters);
401    
402    # get set of objects from odbms by object name    # get set of objects from odbms by object name
403    my $remote = $self->{COREHANDLE}->remote($nodename);    my $remote = $self->{_COREHANDLE}->remote($nodename);
404        
405    # was:    # was:
406    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);
407    
408    # is:    # is:
409    # 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
410    my $evalstring = 'return $self->{COREHANDLE}->select($remote, ' . $tfilter . ');';    my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';
411        
412    # get filtered list/set    # get filtered list/set
413    @results = eval($evalstring);    @results = eval($evalstring);
# Line 399  sub getListFiltered { Line 419  sub getListFiltered {
419  sub createCursor {  sub createCursor {
420    my $self = shift;    my $self = shift;
421    my $node = shift;    my $node = shift;
422    my $cmdHandle = $self->{COREHANDLE}->cursor($node);    my $cmdHandle = $self->{_COREHANDLE}->cursor($node);
423    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );
424    return $result;    return $result;
425  }  }
# Line 434  sub sendQuery { Line 454  sub sendQuery {
454      my $ident = $query->{criterias}->[0]->{val};      my $ident = $query->{criterias}->[0]->{val};
455  #print "load obj", "\n";  #print "load obj", "\n";
456      #return $self->createSet() if $ident == 5;      #return $self->createSet() if $ident == 5;
457      my $object = $self->{COREHANDLE}->load($ident);      my $object = $self->{_COREHANDLE}->load($ident);
458  #print "get id", "\n";  #print "get id", "\n";
459      my $oid = $self->{COREHANDLE}->id($object);      my $oid = $self->{_COREHANDLE}->id($object);
460      return $self->createSet($object);      return $self->createSet($object);
461      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );
462    }    }
# Line 465  sub sendQuery { Line 485  sub sendQuery {
485  sub eraseAll {  sub eraseAll {
486    my $self = shift;    my $self = shift;
487    my $classname = shift;    my $classname = shift;
488    my $remote = $self->{COREHANDLE}->remote($classname);    my $remote = $self->{_COREHANDLE}->remote($classname);
489    my @objs = $self->{COREHANDLE}->select($remote);    my @objs = $self->{_COREHANDLE}->select($remote);
490    $self->{COREHANDLE}->erase(@objs);    $self->{_COREHANDLE}->erase(@objs);
491  }  }
492    
493  sub createDb {  sub createDb {
# Line 479  sub createDb { Line 499  sub createDb {
499  sub getObject {  sub getObject {
500    my $self = shift;    my $self = shift;
501    my $oid = shift;    my $oid = shift;
502      my $options = shift;
503    
504      # TODO: create a deep_unload method (currently _all_ objects are unloaded)
505      # unload($oid) will only unload object, not deep object hashes
506      $self->{_COREHANDLE}->unload() if($options->{destroy});
507    
508    # TODO: review this    # TODO: review this
509    #if (!$self->{COREHANDLE}) { return; }    #if (!$self->{COREHANDLE}) { return; }
510    return $self->{COREHANDLE}->load($oid);  
511      # TODO: review this
512      my $object = eval('$self->{_COREHANDLE}->load($oid);');
513      print $@, "\n" if $@;
514    
515      return $object if $object;
516  }  }
517    
518  sub getObjectAsHash {  sub getObjectAsHash {
519    my $self = shift;    my $self = shift;
520    my $oid = shift;    my $oid = shift;
521    my $options = shift;    my $options = shift;
522    my $obj = $self->getObject($oid);    my $obj = $self->getObject($oid, $options);
523    my $deref = var_deref($obj);    
524    var2utf8($deref) if ($options->{utf8});    # build options (a callback to unload autovivified objects) for 'expand'
525    undef($obj) if($options->{destroy});    # TODO: use $logger to write to debug here!
526    return $deref;    my $cb; # = sub {};
527    =pod
528      if ($options->{destroy}) {
529        $options->{cb}->{destroy} = sub {
530          print "================ DESTROY", "\n";
531          my $object = shift;
532          #print Dumper($object);
533          $self->{_COREHANDLE}->unload($object);
534          #undef($object);
535        };
536      }
537    =cut
538    
539      my $hash = object2hash($obj, $options);
540      #$options->{cb}->{destroy}->($obj);
541      #$self->{_COREHANDLE}->unload($obj);
542      
543      # convert values in hash to utf8 to be ready for (e.g.) encapsulation in XML
544      # now done in object2hash
545      #var2utf8($hash) if ($options->{utf8});
546      
547      # old (wrong) attempts to get rid of used instances, if requested
548        #$obj->clear_refs;
549        #$self->{COREHANDLE}->unload($obj) if($options->{destroy});
550        #$obj->DESTROY;
551        #undef($obj) if($options->{destroy});
552      
553      return $hash;
554  }  }
555    
556  sub getSchema {  sub getSchema {
557    return $schema_tangram;    return $schema_tangram;
558  }  }
559    
560    sub getCOREHANDLE {
561      my $self = shift;
562      return $self->{_COREHANDLE};
563    }
564    
565  1;  1;
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