/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.20 by jonen, Mon Dec 16 20:49:17 2002 UTC revision 1.35 by jonen, Sat Apr 19 16:09:48 2003 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.35  2003/04/19 16:09:48  jonen
7    #  + added operator dispatching (currently for getting ref-type) at 'getListFiltered'
8    #
9    #  Revision 1.34  2003/04/11 01:18:53  joko
10    #  sendQuery:
11    #  + introduced crud action 'DELETE'
12    #
13    #  Revision 1.33  2003/04/09 06:07:43  joko
14    #  revamped 'sub sendQuery'
15    #
16    #  Revision 1.32  2003/04/08 22:52:22  joko
17    #  modified 'querySchema': better behaviour regarding filtering result
18    #
19    #  Revision 1.31  2003/04/05 21:24:09  joko
20    #  modified 'sub getChildNodes': now contains code from 'querySchema'
21    #
22    #  Revision 1.30  2003/03/27 15:31:14  joko
23    #  fixes to modules regarding new namespace(s) below Data::Mungle::*
24    #
25    #  Revision 1.29  2003/02/21 01:47:18  joko
26    #  purged old code
27    #  minor cosmetics
28    #
29    #  Revision 1.28  2003/02/20 20:20:26  joko
30    #  tried to get auto-disconnect working again - failed with that
31    #
32    #  Revision 1.27  2003/01/31 06:30:59  joko
33    #  + enabled 'sendQuery'
34    #
35    #  Revision 1.26  2003/01/30 22:29:47  joko
36    #  + fixed module usage (removed dependency on 'libp.pm')
37    #
38    #  Revision 1.25  2003/01/19 02:30:05  joko
39    #  + fix: modified call to '_initSchema'
40    #
41    #  Revision 1.24  2002/12/22 14:13:01  joko
42    #  + sub dropDb
43    #
44    #  Revision 1.23  2002/12/19 16:31:53  joko
45    #  +- renamed sub to 'rebuildDb'
46    #
47    #  Revision 1.22  2002/12/18 22:28:16  jonen
48    #  + added extended logging at 'getObjectByGuid()'
49    #
50    #  Revision 1.21  2002/12/16 22:20:49  jonen
51    #  + fixed bug at 'getObjectByGuid()'
52    #
53  #  Revision 1.20  2002/12/16 20:49:17  jonen  #  Revision 1.20  2002/12/16 20:49:17  jonen
54  #  + added sub 'getObjectByGuid()'  #  + added sub 'getObjectByGuid()'
55  #  + added functionality to use 'getObjectByGuid' at 'getObjectAsHash()'  #  + added functionality to use 'getObjectByGuid' at 'getObjectAsHash()'
# Line 20  Line 67 
67  #  + fix: encapsulated object-loading inside an 'eval'  #  + fix: encapsulated object-loading inside an 'eval'
68  #  #
69  #  Revision 1.15  2002/12/05 13:55:21  joko  #  Revision 1.15  2002/12/05 13:55:21  joko
70  #  + now utilizing 'object2hash' instead of 'var_deref'  #  + now utilizing 'expand' instead of 'var_deref'
71  #  + played around with having fresh-objects - no progress....  #  + played around with having fresh-objects - no progress....
72  #  #
73  #  Revision 1.14  2002/12/05 09:40:30  jonen  #  Revision 1.14  2002/12/05 09:40:30  jonen
# Line 93  use warnings; Line 140  use warnings;
140  use base ("Data::Storage::Handler");  use base ("Data::Storage::Handler");
141  use base ("Data::Storage::Handler::Abstract");  use base ("Data::Storage::Handler::Abstract");
142    
143  use Tangram;  
144  use Data::Dumper;  use Data::Dumper;
145  use libp qw( getNewPerlObjectByPkgName );  use Tangram;
 use Data::Storage::Result::Tangram;  
 use Data::Compare::Struct qw( isEmpty );  
 use Data::Transform::Deep qw( object2hash );  
 use Data::Transform::Encode qw( var2utf8 );  
146    
147    use DesignPattern::Object;
148    use Data::Storage::Result::Tangram;
149    use Data::Mungle::Compare::Struct qw( isEmpty );
150    use Data::Mungle::Transform::Deep qw( expand deep_copy merge_to );
151    
152  # get logger instance  # get logger instance
153  my $logger = Log::Dispatch::Config->instance;  my $logger = Log::Dispatch::Config->instance;
# Line 121  sub _initSchema { Line 168  sub _initSchema {
168    my $self = shift;    my $self = shift;
169    $logger->debug( __PACKAGE__ . "->_initSchema()" );    $logger->debug( __PACKAGE__ . "->_initSchema()" );
170    #if (!$schema_tangram) {    #if (!$schema_tangram) {
171      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} } );
172        my $obj = DesignPattern::Object->fromPackage($self->{locator}->{schema}, { 'EXPORT_OBJECTS' => $self->{locator}->{classnames}, 'want_transactions' => $self->{locator}->{want_transactions} } );
173      $schema_tangram = $obj->getSchema();      $schema_tangram = $obj->getSchema();
174    #}    #}
175    if (!$schema_tangram) {    if (!$schema_tangram) {
# Line 154  sub connect { Line 202  sub connect {
202      my $self = shift;      my $self = shift;
203            
204      my $dsn = shift;      my $dsn = shift;
205    
206    #print Dumper($self);
207    #exit;
208    
209        # TODO: re-enable
210      $dsn ||= $self->{locator}->{dbi}->{dsn};      $dsn ||= $self->{locator}->{dbi}->{dsn};
       
211      $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );      $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
212            
213      #my $storage = Tangram::Relational->connect( $schema, $dsn );      #my $storage = Tangram::Relational->connect( $schema, $dsn );
# Line 167  sub connect { Line 219  sub connect {
219  #      return;  #      return;
220  #    }  #    }
221    
222      return unless $self->_initSchema();      #return unless $self->_initSchema();
223        $self->_initSchema();
224    
225      # create the main tangram storage object      # create the main tangram storage object
226      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
# Line 194  sub connect { Line 247  sub connect {
247  sub getChildNodes {  sub getChildNodes {
248    
249    my $self = shift;    my $self = shift;
250    my @nodes;    my $mode = shift;
251      my $filter = shift;
252      
253      $mode ||= 'core';
254      $filter ||= 'all';
255      
256      $logger->debug( __PACKAGE__ . "->getChildNodes($mode)" );
257    
258    $logger->debug( __PACKAGE__ . "->getChildNodes()" );    if ($mode eq 'core') {
259    
260    # create new DBI - Data::Storage - object from already connected DBI::db - handle inside the current COREHANDLE      my @nodes;
261    #my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} });      
262    #my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} );      # create new DBI - Data::Storage - object from already connected DBI::db - handle inside the current COREHANDLE
263          #my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} });
264    # todo: should we retrieve information from the schema here      #my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} );
265    # rather than poorly getting table names from underlying dbi?      
266    my $storage = $self->_getSubLayerHandle();      # todo: should we retrieve information from the schema here
267    @nodes = @{$storage->getChildNodes()};      # rather than poorly getting table names from underlying dbi?
268    #$storage->_configureCOREHANDLE();      my $storage = $self->_getSubLayerHandle();
269  #print "getchildnodes\n";      @nodes = @{$storage->getChildNodes()};
270  #print Dumper($self);      #$storage->_configureCOREHANDLE();
271    #if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {    #print "getchildnodes\n";
272      #print Dumper($self);
273        #if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
274        
275        # TODO: REVIEW
276        #$storage->disconnect();
277        
278        $self->{meta}->{childnodes} = \@nodes;
279    
280        return \@nodes;
281        
282    # TODO: REVIEW    } elsif ($mode eq 'root') {
283    #$storage->disconnect();      
284        # FIXME: this will return *all* known classes to 'Class::Tangram',
285        # which might not be what you expect since more than one instance
286        # of Tangram may be in memory and Class::Tangram seems to
287        # offer no methods to determine this or filter its result(s) according
288        # to a specific database.
289        my @object_names = Class::Tangram::known_classes();
290        my @concret_names;
291        my $o_cnt;
292        foreach (sort @object_names) {
293          push @concret_names, $_  if (!Class::Tangram::class_is_abstract($_));
294          $o_cnt++;
295        }
296    
297        if ($filter eq 'all') {
298          return \@object_names;
299        } elsif ($filter eq 'concrete') {
300          return \@concret_names;
301        }
302        
303    $self->{meta}->{childnodes} = \@nodes;    }
304        
   return \@nodes;  
305    
306  }  }
307    
   
308  sub testIntegrity {  sub testIntegrity {
309    
310    my $self = shift;    my $self = shift;
# Line 294  sub configureCOREHANDLE { Line 378  sub configureCOREHANDLE {
378    $logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );    $logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );
379    
380    #my $subLayer = $self->_getSubLayerHandle();    #my $subLayer = $self->_getSubLayerHandle();
381      #print Dumper($self);
382      #exit;
383    
384    # apply configured modifications    # apply configured modifications
385      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
# Line 359  sub retreatSchema { Line 445  sub retreatSchema {
445    return $ok;    return $ok;
446  }  }
447    
448  sub rebuildDbAndSchema {  sub rebuildDb {
449    my $self = shift;    my $self = shift;
450    $logger->info( __PACKAGE__ . "->rebuildDbAndSchema()" );    $logger->info( __PACKAGE__ . "->rebuildDb()" );
451    my @results;    my @results;
452    
453    # sum up results (bool (0/1)) in array    # sum up results (bool (0/1)) in array
# Line 401  sub getListFiltered { Line 487  sub getListFiltered {
487    my @results;    my @results;
488    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );    $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );
489    
490    #print Dumper($filters);  #print Dumper($filters);
491        
492    my @tfilters;    my @tfilters;
493        
# Line 423  sub getListFiltered { Line 509  sub getListFiltered {
509    #    objects => $objects,    #    objects => $objects,
510    #  );    #  );
511        
512      # HACK: build eval-string (sorry) to get filtered list - please give advice here      # TODO: is_op?
513      push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";      # dispatch un-common operators if exists
514        if($filter->{op} eq "ref") {
515          push @tfilters, 'ref($remote->{' . $filter->{key} . '})' . " eq '$filter->{val}'";
516        } else {
517          # HACK: build eval-string (sorry) to get filtered list - please give advice here
518          push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
519        }
520    
521    }    }
522    
# Line 440  sub getListFiltered { Line 532  sub getListFiltered {
532    # 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
533    my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';    my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';
534        
535      #print "eval: $evalstring", "\n";
536      
537    # get filtered list/set    # get filtered list/set
538    @results = eval($evalstring);    @results = eval($evalstring);
539    die $@ if $@;    die $@ if $@;
# Line 475  sub createSet { Line 569  sub createSet {
569  sub sendQuery {  sub sendQuery {
570    my $self = shift;    my $self = shift;
571    my $query = shift;    my $query = shift;
   #my $sql = "SELECT cs FROM $self->{metainfo}->{$descent}->{node} WHERE $self->{metainfo}->{$descent}->{IdentProvider}->{arg}='$self->{entry}->{source}->{ident}';";  
   #my $result = $self->{metainfo}->{$descent}->{storage}->sendCommand($sql);  
572    
573    #print Dumper($query);    #print Dumper($query);
574    
575    # HACK: special case: querying by id does not translate into a common tangram query    # type = ITEM|LIST|TRANSPARENT
576    # just load the object by given id(ent)    my $type = '';
577    if ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq') {    # mode = OID|SPECIAL
578      #print "LOAD!!!", "\n";    my $mode = '';
579      #exit;    my $ident = '';
580      #return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );    my $crud = '';
581      my $ident = $query->{criterias}->[0]->{val};    
582  #print "load obj", "\n";    
583      #return $self->createSet() if $ident == 5;    # dispatch type and mode
584      $self->{_COREHANDLE}->unload($ident);    
585      my $object = $self->{_COREHANDLE}->load($ident);      # defaults - 1
586  #print "get id", "\n";      if ($query->{options}) {
587      my $oid = $self->{_COREHANDLE}->id($object);        $crud = $query->{options}->{crud};
588  #print Dumper($object);        $crud ||= $query->{options}->{action};
589  #print "oid: $oid", "\n";      }
590      return $self->createSet($object);  
591      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );      # defaults - 2
592    }      $type ||= 'TRANSPARENT';
593        $crud ||= 'RETRIEVE';
594    die("This should not be reached for now - redirect to \$self->getListFiltered() here!");  
595        if ($query->{options}->{OID}) {
596    # TODO: do a common tangram query here        $type = 'ITEM';
597          $mode = 'OID';
598    my @crits;        $ident = $query->{options}->{OID};
599    foreach (@{$query->{criterias}}) {      
600      my $op = '';      } elsif (my $guid = $query->{options}->{GUID}) {
601      $op = '=' if lc $_->{op} eq 'eq';        $type = 'TRANSPARENT';
602      push @crits, "$_->{key}$op'$_->{val}'";        $query->{criterias} = [ { key => 'guid', op => 'eq', val => $guid } ];    
603    }  
604    my $subnodes = {};      # if operator is different (dispatcher for 'getListFiltered')
605    map { $subnodes->{$_}++ } @{$query->{subnodes}};      } elsif (my $op = $query->{options}->{op}) {
606    # HACK: this is hardcoded ;(    expand possibilities!        $type = 'TRANSPARENT';
607    #my $crit = join(' AND ', @crits);        $query->{criterias} = [ { key => $query->{options}->{meta_label}, op => $op, val => $query->{options}->{meta_value} } ];    
608    #my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);  
609    #return $self->sendCommand($sql);      }
610    #my $h = $self->{COREHANDLE}->remote($query->{node});    
611    #my $res = $self->{COREHANDLE}->select($h, $h->{);      # HACK: special case: querying by id does not translate into a common tangram query
612    return $self->createCursor($query->{node});      # just load the object by given identifier (OID) named 'id' - this is required by Data::Transfer::Sync!
613        if ($query->{criterias} && ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq')) {
614          $type = 'ITEM';
615          $mode = 'SPECIAL.SYNC';
616          $ident = $query->{criterias}->[0]->{val};
617        }
618      
619    
620      # execute query
621      my $result;
622    
623      if ($type eq 'ITEM' && $ident) {
624    
625        if ($mode eq 'OID') {    
626          # TODO: review this case!
627          $result = $self->getObject($ident, $query->{options});
628        
629        } elsif ($mode eq 'SPECIAL.SYNC') {
630    
631          # V1 - failed
632          #return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );
633      
634          # hmm....
635          #return $self->createSet() if $ident == 5;
636          
637          # Unload single object before doing any further operations to
638          # expect a "fresh" object from orm when performing the next calls.
639          $self->{_COREHANDLE}->unload($ident);
640          
641          # Load object from orm.
642          my $object = $self->{_COREHANDLE}->load($ident);
643      
644          # determine object identifier (OID)
645          my $oid = $self->{_COREHANDLE}->id($object);
646          
647          # encapsulate into result/response container and return this one
648          $result = $self->createSet($object);
649          
650          # debugging
651          #$result = $self->createSet( $self->{COREHANDLE}->load('300090018') );
652    
653        }
654        
655      
656      } elsif ($type eq 'TRANSPARENT') {
657    
658        if ($crud eq 'RETRIEVE') {
659    
660          my $list = $self->getListFiltered($query->{node}, $query->{criterias});
661          #return $self->createSet($object);
662          #return $self->createSet($list);
663          return $self->createSet(@$list);
664        
665          #die("This should not be reached for now - redirect to \$self->getListFiltered() here!");
666        
667          # try a generic tangram query here
668          # TODO: try to place an oql on top of that (search.cpan.org!)
669          my @crits;
670          foreach (@{$query->{criterias}}) {
671            my $op = '';
672            $op = '=' if lc $_->{op} eq 'eq';
673            push @crits, "$_->{key}$op'$_->{val}'";
674          }
675          my $subnodes = {};
676          map { $subnodes->{$_}++ } @{$query->{subnodes}};
677          # HACK: this is hardcoded ;(    expand possibilities!
678          #my $crit = join(' AND ', @crits);
679          #my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);
680          #return $self->sendCommand($sql);
681          #my $h = $self->{COREHANDLE}->remote($query->{node});
682          #my $res = $self->{COREHANDLE}->select($h, $h->{);
683          $result = $self->createCursor($query->{node});
684    
685        } elsif ($crud eq 'UPDATE') {
686    
687          # Patch current query to be a loader (e.g. change action, remove payload) ...
688          my $childquery = deep_copy($query);
689          $childquery->{options}->{crud} = 'RETRIEVE';
690          delete $childquery->{payload};
691    
692          # ... to use it to fetch a fresh object using ourselves (sendQuery).
693          my $cursor = $self->sendQuery($childquery);
694          my $status = $cursor->getStatus();
695          my $object = $cursor->getNextEntry();
696    
697          # Merge values and apply value modifiers.
698          my $options = { utf8 => 1, php => 1 };
699          merge_to($object, $query->{payload}, $options);
700    
701          # Execute update operation at orm.
702          $self->update($object);
703        
704        } elsif ($crud eq 'DELETE') {
705    
706          # Patch current query to be a loader (e.g. change action) ...
707          my $childquery = deep_copy($query);
708          $childquery->{options}->{crud} = 'RETRIEVE';
709    
710          # ... to use it to fetch a fresh object using ourselves (sendQuery).
711          my $cursor = $self->sendQuery($childquery);
712          my $status = $cursor->getStatus();
713          my $object = $cursor->getNextEntry();
714    
715          $self->erase($object);
716    
717        }
718    
719      }
720    
721      return $result;
722    
723  }  }
724    
725  sub eraseAll {  sub eraseAll {
# Line 553  sub getObject { Line 755  sub getObject {
755    return $object if $object;    return $object if $object;
756  }  }
757    
758  sub getObjectByGuid {  sub getObjectByGuid_old {
759    my $self = shift;    my $self = shift;
760    my $guid = shift;    my $guid = shift;
761    my $options = shift;    my $options = shift;
762        
763    # Guid and Classname is needed    # Guid and Classname is needed
764    if(!$guid || !$options->{classname}) {    if(!$guid || !$options->{classname}) {
765       $logger->error( __PACKAGE__ . "->getObjectByGuid: No 'guid' OR no Classname in options hash was given but needed!" );
766      return;      return;
767    }    }
768        
# Line 568  sub getObjectByGuid { Line 771  sub getObjectByGuid {
771    $self->{_COREHANDLE}->unload() if ($options->{destroy});    $self->{_COREHANDLE}->unload() if ($options->{destroy});
772    
773    # search for object with given Classname and Guid    # search for object with given Classname and Guid
774    my $obj_tmp = $self->{_COREHANDLE}->remote($classname);    my $obj_tmp = $self->{_COREHANDLE}->remote($options->{classname});
775    my @result = $self->{_COREHANDLE}->select($obj_tmp, $obj_tmp->{guid} eq $guid);    my @result = $self->{_COREHANDLE}->select($obj_tmp, $obj_tmp->{guid} eq $guid);
776        
777    # we searched for global unique identifer of some object,    # we searched for global unique identifer of some object,
778    # so it think we can trust there would be only one result    # so I think we can trust there would be only one result
779    if($result[0]) {    if($result[0]) {
780      return $result[0];      return $result[0];
781    } else {    } else {
782      return "No Object with Classname $classname and GUID $options->{guid} found!";      $logger->error( __PACKAGE__ . "->getObjectByGuid: No Object with Classname $options->{classname} and GUID $guid found!" );
783        return;
784    }    }
785        
786  }  }
787    
788  sub getObjectAsHash {  sub getObjectAsHash_old {
789    my $self = shift;    my $self = shift;
790    my $oid = shift;    my $oid = shift;
791    my $options = shift;      my $options = shift;  
# Line 596  sub getObjectAsHash { Line 800  sub getObjectAsHash {
800    # build options (a callback to unload autovivified objects) for 'expand'    # build options (a callback to unload autovivified objects) for 'expand'
801    # TODO: use $logger to write to debug here!    # TODO: use $logger to write to debug here!
802    my $cb; # = sub {};    my $cb; # = sub {};
803    
804      # deactivated way to get rid of used instances, if requested
805  =pod  =pod
806    if ($options->{destroy}) {      if ($options->{destroy}) {
807      $options->{cb}->{destroy} = sub {        $options->{cb}->{destroy} = sub {
808        print "================ DESTROY", "\n";          print "================ DESTROY", "\n";
809        my $object = shift;          my $object = shift;
810        #print Dumper($object);          #print Dumper($object);
811        $self->{_COREHANDLE}->unload($object);          $self->{_COREHANDLE}->unload($object);
812        #undef($object);          #undef($object);
813      };        };
814    }      }
815  =cut  =cut
816    
817    my $hash = object2hash($obj, $options);    my $hash = expand($obj, $options);
818    #$options->{cb}->{destroy}->($obj);  
819    #$self->{_COREHANDLE}->unload($obj);    # old (unsuccessful) attempts to get rid of used instances, if requested
820      
821    # convert values in hash to utf8 to be ready for (e.g.) encapsulation in XML      # V1:
822    # now done in object2hash      #$options->{cb}->{destroy}->($obj);
823    #var2utf8($hash) if ($options->{utf8});      #$self->{_COREHANDLE}->unload($obj);
824        
825    # old (wrong) attempts to get rid of used instances, if requested      # V2:
826      #$obj->clear_refs;      #$obj->clear_refs;
827      #$self->{COREHANDLE}->unload($obj) if($options->{destroy});      #$self->{COREHANDLE}->unload($obj) if($options->{destroy});
828      #$obj->DESTROY;      #$obj->DESTROY;
# Line 634  sub getCOREHANDLE { Line 840  sub getCOREHANDLE {
840    return $self->{_COREHANDLE};    return $self->{_COREHANDLE};
841  }  }
842    
843    sub dropDb {
844      my $self = shift;
845      my $storage = $self->_getSubLayerHandle();
846      return $storage->dropDb();
847    }
848    
849    sub testAvailability {
850      my $self = shift;
851      my $storage = $self->_getSubLayerHandle();
852      return $storage->testAvailability();
853    }
854    
855    sub disconnect2 {
856      my $self = shift;
857      my $storage = $self->_getSubLayerHandle();
858      print "DISC!", "\n";
859    
860      my $storage_ll = $storage->{_COREHANDLE};
861      $storage_ll->disconnect();
862      
863      print Dumper($storage);
864      exit;
865      
866      #$self->{_COREHANDLE}
867      #$storage->disconnect();
868      $self->{dataStorageLayer}->disconnect();
869    }
870    
871  1;  1;
872    __END__

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