/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.11 by jonen, Wed Dec 4 08:54:08 2002 UTC revision 1.23 by joko, Thu Dec 19 16:31:53 2002 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.23  2002/12/19 16:31:53  joko
7    #  +- renamed sub to 'rebuildDb'
8    #
9    #  Revision 1.22  2002/12/18 22:28:16  jonen
10    #  + added extended logging at 'getObjectByGuid()'
11    #
12    #  Revision 1.21  2002/12/16 22:20:49  jonen
13    #  + fixed bug at 'getObjectByGuid()'
14    #
15    #  Revision 1.20  2002/12/16 20:49:17  jonen
16    #  + added sub 'getObjectByGuid()'
17    #  + added functionality to use 'getObjectByGuid' at 'getObjectAsHash()'
18    #
19    #  Revision 1.19  2002/12/16 06:46:09  joko
20    #  + attempt to introduce a generic '_patchSchema' - cancelled!
21    #
22    #  Revision 1.18  2002/12/13 21:48:07  joko
23    #  + fix to 'sub sendQuery'
24    #
25    #  Revision 1.17  2002/12/12 02:51:09  joko
26    #  + cosmetics
27    #
28    #  Revision 1.16  2002/12/11 06:54:10  joko
29    #  + fix: encapsulated object-loading inside an 'eval'
30    #
31    #  Revision 1.15  2002/12/05 13:55:21  joko
32    #  + now utilizing 'object2hash' instead of 'var_deref'
33    #  + played around with having fresh-objects - no progress....
34    #
35    #  Revision 1.14  2002/12/05 09:40:30  jonen
36    #  + added option->{destroy} at getObject for unloading all instance
37    #
38    #  Revision 1.13  2002/12/05 07:59:04  joko
39    #  + now using Tie::SecureHash as a base for the COREHANDLE
40    #  + former public COREHANDLE becomes private _COREHANDLE now
41    #  + sub getCOREHANDLE
42    #
43    #  Revision 1.12  2002/12/04 11:34:49  joko
44    #  - $schema_tangram doesn't have to be in class?
45    #
46  #  Revision 1.11  2002/12/04 08:54:08  jonen  #  Revision 1.11  2002/12/04 08:54:08  jonen
47  #  + untested bugfix: undef($object) after transform to hash at getObjectAsHash  #  + untested bugfix: undef($object) after transform to hash at getObjectAsHash
48  #  #
# Line 59  package Data::Storage::Handler::Tangram; Line 99  package Data::Storage::Handler::Tangram;
99  use strict;  use strict;
100  use warnings;  use warnings;
101    
102    use base ("Data::Storage::Handler");
103  use base ("Data::Storage::Handler::Abstract");  use base ("Data::Storage::Handler::Abstract");
104    
105  use Tangram;  use Tangram;
# Line 66  use Data::Dumper; Line 107  use Data::Dumper;
107  use libp qw( getNewPerlObjectByPkgName );  use libp qw( getNewPerlObjectByPkgName );
108  use Data::Storage::Result::Tangram;  use Data::Storage::Result::Tangram;
109  use Data::Compare::Struct qw( isEmpty );  use Data::Compare::Struct qw( isEmpty );
110  use Data::Transform::Deep qw( var_deref );  use Data::Transform::Deep qw( object2hash );
111  use Data::Transform::Encode qw( var2utf8 );  use Data::Transform::Encode qw( var2utf8 );
112    
113    
# Line 74  use Data::Transform::Encode qw( var2utf8 Line 115  use Data::Transform::Encode qw( var2utf8
115  my $logger = Log::Dispatch::Config->instance;  my $logger = Log::Dispatch::Config->instance;
116    
117    
118    # this holds the complete instantiated schema from tangram
119    my $schema_tangram;
120    
121  sub getMetaInfo {  sub getMetaInfo {
122    my $self = shift;    my $self = shift;
123    $logger->debug( __PACKAGE__ . "->getMetaInfo()"  );    $logger->debug( __PACKAGE__ . "->getMetaInfo()"  );
# Line 85  sub getMetaInfo { Line 129  sub getMetaInfo {
129  sub _initSchema {  sub _initSchema {
130    my $self = shift;    my $self = shift;
131    $logger->debug( __PACKAGE__ . "->_initSchema()" );    $logger->debug( __PACKAGE__ . "->_initSchema()" );
132    #if (!$self->{schema_tangram}) {    #if (!$schema_tangram) {
133      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} } );
134      $self->{schema_tangram} = $obj->getSchema();      $schema_tangram = $obj->getSchema();
135    #}    #}
136    if (!$self->{schema_tangram}) {    if (!$schema_tangram) {
137      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );
138      return 0;      return 0;
139    }    }
140      #$self->_patchSchema();
141    return 1;    return 1;
142  }  }
143    
144    sub _patchSchema {
145      my $self = shift;
146      foreach (keys %{$schema_tangram->{classes}}) {
147        next if $schema_tangram->{classes}->{$_}->{abstract};
148        #next if ($_ ne 'TsBankAccount');
149        #$_ ne 'AbstractAccount' &&
150        print "class: $_", "\n";
151    #print Dumper($schema_tangram->{classes}->{$_});
152        # create new string property named 'guid'
153        my $tstring = Tangram::String->new();
154        $tstring->{name} = $tstring->{col} = 'guid';
155        # inject property into schema
156        #$schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields}->{string}->{$tstring->{name}} = $tstring;
157        print Dumper($schema_tangram->{classes}->{$_}->{root}->{SPECS}->[0]->{fields});
158      }
159    }
160    
161  sub connect {  sub connect {
162    
163      my $self = shift;      my $self = shift;
# Line 118  sub connect { Line 180  sub connect {
180    
181      # create the main tangram storage object      # create the main tangram storage object
182      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
183      $self->{COREHANDLE} = Tangram::Relational->connect( $self->{schema_tangram}, $dsn );      $self->{_COREHANDLE} = Tangram::Relational->connect( $schema_tangram, $dsn );
184    
185    #print "connect", "\n";
186    #my $core = $self->{_COREHANDLE};
187    #print Dumper($core);
188        
189      # some attempts for configuring the wrapped underlying dbi.....      # some attempts for configuring the wrapped underlying dbi.....
190      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
# Line 224  sub _configureUnderlyingStorage { Line 290  sub _configureUnderlyingStorage {
290    foreach my $key (keys %{$self->{dbi}}) {    foreach my $key (keys %{$self->{dbi}}) {
291      my $val = $self->{dbi}->{$key};      my $val = $self->{dbi}->{$key};
292      print "entry: $key; $val", "\n";      print "entry: $key; $val", "\n";
293      $self->{COREHANDLE}->{db}->{$key} = $val;      $self->{_COREHANDLE}->{db}->{$key} = $val;
294    }    }
295    #print Dumper($self->{COREHANDLE}->{db});    #print Dumper($self->{COREHANDLE}->{db});
296  }  }
# Line 240  sub configureCOREHANDLE { Line 306  sub configureCOREHANDLE {
306    
307    # apply configured modifications    # apply configured modifications
308      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
309        $self->{COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});        $self->{_COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});
310      }      }
311      if (exists $self->{dbi}->{RaiseError}) {      if (exists $self->{dbi}->{RaiseError}) {
312        $self->{COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};        $self->{_COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};
313      }      }
314      if (exists $self->{dbi}->{PrintError}) {      if (exists $self->{dbi}->{PrintError}) {
315        $self->{COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};        $self->{_COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};
316      }      }
317      if (exists $self->{dbi}->{HandleError}) {      if (exists $self->{dbi}->{HandleError}) {
318        $self->{COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};        $self->{_COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};
319      }      }
320    
321  }  }
# Line 265  sub deploySchema { Line 331  sub deploySchema {
331    my $ok;    my $ok;
332    if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {    if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
333      return unless $self->_initSchema();      return unless $self->_initSchema();
334      $ok = Tangram::Relational->deploy($self->{schema_tangram}, $dbh );      $ok = Tangram::Relational->deploy($schema_tangram, $dbh );
335      $dbh->disconnect();      $dbh->disconnect();
336    }    }
337    return $ok;    return $ok;
# Line 286  sub retreatSchema { Line 352  sub retreatSchema {
352      #use Data::Dumper; print Dumper($self);      #use Data::Dumper; print Dumper($self);
353      $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");      $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");
354            
355      $ok = Tangram::Relational->retreat($self->{schema_tangram}, $dbh );      $ok = Tangram::Relational->retreat($schema_tangram, $dbh );
356    
357      # answer "$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...
358      # - ... Tangram::Relational->retreat doesn't seem to return a valid status      # - ... Tangram::Relational->retreat doesn't seem to return a valid status
# Line 302  sub retreatSchema { Line 368  sub retreatSchema {
368    return $ok;    return $ok;
369  }  }
370    
371  sub rebuildDbAndSchema {  sub rebuildDb {
372    my $self = shift;    my $self = shift;
373    $logger->info( __PACKAGE__ . "->rebuildDbAndSchema()" );    $logger->info( __PACKAGE__ . "->rebuildDb()" );
374    my @results;    my @results;
375    
376    # sum up results (bool (0/1)) in array    # sum up results (bool (0/1)) in array
# Line 328  sub getListUnfiltered { Line 394  sub getListUnfiltered {
394    my @results;    my @results;
395    $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );    $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );
396    # get set of objects from odbms by object name    # get set of objects from odbms by object name
397    my $object_set = $self->{COREHANDLE}->remote($nodename);    my $object_set = $self->{_COREHANDLE}->remote($nodename);
398    @results = $self->{COREHANDLE}->select($object_set);    @results = $self->{_COREHANDLE}->select($object_set);
399    return \@results;    return \@results;
400  }  }
401    
# Line 374  sub getListFiltered { Line 440  sub getListFiltered {
440    my $tfilter = join(' & ', @tfilters);    my $tfilter = join(' & ', @tfilters);
441    
442    # get set of objects from odbms by object name    # get set of objects from odbms by object name
443    my $remote = $self->{COREHANDLE}->remote($nodename);    my $remote = $self->{_COREHANDLE}->remote($nodename);
444        
445    # was:    # was:
446    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);
447    
448    # is:    # is:
449    # 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
450    my $evalstring = 'return $self->{COREHANDLE}->select($remote, ' . $tfilter . ');';    my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';
451        
452    # get filtered list/set    # get filtered list/set
453    @results = eval($evalstring);    @results = eval($evalstring);
# Line 393  sub getListFiltered { Line 459  sub getListFiltered {
459  sub createCursor {  sub createCursor {
460    my $self = shift;    my $self = shift;
461    my $node = shift;    my $node = shift;
462    my $cmdHandle = $self->{COREHANDLE}->cursor($node);    my $cmdHandle = $self->{_COREHANDLE}->cursor($node);
463    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );
464    return $result;    return $result;
465  }  }
466    
467  sub createSet {  sub createSet {
468    my $self = shift;    my $self = shift;
469    #print "-" x 80, "\n";
470    #print Dumper(@_);
471    my @objects = @_;    my @objects = @_;
472    my $rh = Set::Object->new();    my $rh = Set::Object->new();
473    foreach (@objects) {    foreach (@objects) {
474      #print Dumper($_);      if (!isEmpty($_)) {
475      $rh->insert($_) if !isEmpty($_);  #print Dumper($_);
476          $rh->insert($_);
477        }
478    }    }
479    #print Dumper($rh->members());    #print Dumper($rh->members());
480    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
# Line 428  sub sendQuery { Line 498  sub sendQuery {
498      my $ident = $query->{criterias}->[0]->{val};      my $ident = $query->{criterias}->[0]->{val};
499  #print "load obj", "\n";  #print "load obj", "\n";
500      #return $self->createSet() if $ident == 5;      #return $self->createSet() if $ident == 5;
501      my $object = $self->{COREHANDLE}->load($ident);      $self->{_COREHANDLE}->unload($ident);
502        my $object = $self->{_COREHANDLE}->load($ident);
503  #print "get id", "\n";  #print "get id", "\n";
504      my $oid = $self->{COREHANDLE}->id($object);      my $oid = $self->{_COREHANDLE}->id($object);
505    #print Dumper($object);
506    #print "oid: $oid", "\n";
507      return $self->createSet($object);      return $self->createSet($object);
508      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );
509    }    }
# Line 459  sub sendQuery { Line 532  sub sendQuery {
532  sub eraseAll {  sub eraseAll {
533    my $self = shift;    my $self = shift;
534    my $classname = shift;    my $classname = shift;
535    my $remote = $self->{COREHANDLE}->remote($classname);    my $remote = $self->{_COREHANDLE}->remote($classname);
536    my @objs = $self->{COREHANDLE}->select($remote);    my @objs = $self->{_COREHANDLE}->select($remote);
537    $self->{COREHANDLE}->erase(@objs);    $self->{_COREHANDLE}->erase(@objs);
538  }  }
539    
540  sub createDb {  sub createDb {
# Line 473  sub createDb { Line 546  sub createDb {
546  sub getObject {  sub getObject {
547    my $self = shift;    my $self = shift;
548    my $oid = shift;    my $oid = shift;
549      my $options = shift;
550    
551      # TODO: create a deep_unload method (currently _all_ objects are unloaded)
552      # unload($oid) will only unload object, not deep object hashes
553      $self->{_COREHANDLE}->unload() if ($options->{destroy});
554    
555    # TODO: review this    # TODO: review this
556    #if (!$self->{COREHANDLE}) { return; }    #if (!$self->{COREHANDLE}) { return; }
557    return $self->{COREHANDLE}->load($oid);  
558      # TODO: review this
559      my $object = eval('$self->{_COREHANDLE}->load($oid);');
560      print $@, "\n" if $@;
561    
562      return $object if $object;
563    }
564    
565    sub getObjectByGuid {
566      my $self = shift;
567      my $guid = shift;
568      my $options = shift;
569      
570      # Guid and Classname is needed
571      if(!$guid || !$options->{classname}) {
572       $logger->error( __PACKAGE__ . "->getObjectByGuid: No 'guid' OR no Classname in options hash was given but needed!" );
573        return;
574      }
575      
576      # TODO: create a deep_unload method (currently _all_ objects are unloaded)
577      # unload($oid) will only unload object, not deep object hashes
578      $self->{_COREHANDLE}->unload() if ($options->{destroy});
579    
580      # search for object with given Classname and Guid
581      my $obj_tmp = $self->{_COREHANDLE}->remote($options->{classname});
582      my @result = $self->{_COREHANDLE}->select($obj_tmp, $obj_tmp->{guid} eq $guid);
583      
584      # we searched for global unique identifer of some object,
585      # so I think we can trust there would be only one result
586      if($result[0]) {
587        return $result[0];
588      } else {
589        $logger->error( __PACKAGE__ . "->getObjectByGuid: No Object with Classname $options->{classname} and GUID $guid found!" );
590        return;
591      }
592      
593  }  }
594    
595  sub getObjectAsHash {  sub getObjectAsHash {
596    my $self = shift;    my $self = shift;
597    my $oid = shift;    my $oid = shift;
598    my $options = shift;    my $options = shift;  
599    my $obj = $self->getObject($oid);    my $obj;
600    my $deref = var_deref($obj);    
601    var2utf8($deref) if ($options->{utf8});    if($options->{guid}) {
602    undef($obj) if($options->{destroy});      $obj = $self->getObjectByGuid($oid, $options);
603    return $deref;    } else {
604        $obj = $self->getObject($oid, $options);
605      }
606      
607      # build options (a callback to unload autovivified objects) for 'expand'
608      # TODO: use $logger to write to debug here!
609      my $cb; # = sub {};
610    =pod
611      if ($options->{destroy}) {
612        $options->{cb}->{destroy} = sub {
613          print "================ DESTROY", "\n";
614          my $object = shift;
615          #print Dumper($object);
616          $self->{_COREHANDLE}->unload($object);
617          #undef($object);
618        };
619      }
620    =cut
621    
622      my $hash = object2hash($obj, $options);
623      #$options->{cb}->{destroy}->($obj);
624      #$self->{_COREHANDLE}->unload($obj);
625      
626      # convert values in hash to utf8 to be ready for (e.g.) encapsulation in XML
627      # now done in object2hash
628      #var2utf8($hash) if ($options->{utf8});
629      
630      # old (wrong) attempts to get rid of used instances, if requested
631        #$obj->clear_refs;
632        #$self->{COREHANDLE}->unload($obj) if($options->{destroy});
633        #$obj->DESTROY;
634        #undef($obj) if($options->{destroy});
635      
636      return $hash;
637    }
638    
639    sub getSchema {
640      return $schema_tangram;
641    }
642    
643    sub getCOREHANDLE {
644      my $self = shift;
645      return $self->{_COREHANDLE};
646  }  }
647    
648  1;  1;
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