/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.8 by joko, Sun Dec 1 22:25:51 2002 UTC revision 1.17 by joko, Thu Dec 12 02:51:09 2002 UTC
# Line 3  Line 3 
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.17  2002/12/12 02:51:09  joko
7    #  + cosmetics
8    #
9    #  Revision 1.16  2002/12/11 06:54:10  joko
10    #  + fix: encapsulated object-loading inside an 'eval'
11    #
12    #  Revision 1.15  2002/12/05 13:55:21  joko
13    #  + now utilizing 'object2hash' instead of 'var_deref'
14    #  + played around with having fresh-objects - no progress....
15    #
16    #  Revision 1.14  2002/12/05 09:40:30  jonen
17    #  + added option->{destroy} at getObject for unloading all instance
18    #
19    #  Revision 1.13  2002/12/05 07:59:04  joko
20    #  + now using Tie::SecureHash as a base for the COREHANDLE
21    #  + former public COREHANDLE becomes private _COREHANDLE now
22    #  + sub getCOREHANDLE
23    #
24    #  Revision 1.12  2002/12/04 11:34:49  joko
25    #  - $schema_tangram doesn't have to be in class?
26    #
27    #  Revision 1.11  2002/12/04 08:54:08  jonen
28    #  + untested bugfix: undef($object) after transform to hash at getObjectAsHash
29    #
30    #  Revision 1.10  2002/12/03 15:53:23  joko
31    #  + small bugfix regarding object hierarchy
32    #
33    #  Revision 1.9  2002/12/03 05:29:40  joko
34    #  + sub getObject
35    #  + sub getObjectAsHash
36    #
37  #  Revision 1.8  2002/12/01 22:25:51  joko  #  Revision 1.8  2002/12/01 22:25:51  joko
38  #  + now utilizing metadata from storage locator when connecting to DBI in "raw"-mode  #  + now utilizing metadata from storage locator when connecting to DBI in "raw"-mode
39  #  #
# Line 49  package Data::Storage::Handler::Tangram; Line 80  package Data::Storage::Handler::Tangram;
80  use strict;  use strict;
81  use warnings;  use warnings;
82    
83    use base ("Data::Storage::Handler");
84  use base ("Data::Storage::Handler::Abstract");  use base ("Data::Storage::Handler::Abstract");
85    
86  use Tangram;  use Tangram;
# Line 56  use Data::Dumper; Line 88  use Data::Dumper;
88  use libp qw( getNewPerlObjectByPkgName );  use libp qw( getNewPerlObjectByPkgName );
89  use Data::Storage::Result::Tangram;  use Data::Storage::Result::Tangram;
90  use Data::Compare::Struct qw( isEmpty );  use Data::Compare::Struct qw( isEmpty );
91    use Data::Transform::Deep qw( object2hash );
92    use Data::Transform::Encode qw( var2utf8 );
93    
94    
95  # get logger instance  # get logger instance
96  my $logger = Log::Dispatch::Config->instance;  my $logger = Log::Dispatch::Config->instance;
97    
98    
99    # this holds the complete instantiated schema from tangram
100    my $schema_tangram;
101    
102  sub getMetaInfo {  sub getMetaInfo {
103    my $self = shift;    my $self = shift;
104    $logger->debug( __PACKAGE__ . "->getMetaInfo()"  );    $logger->debug( __PACKAGE__ . "->getMetaInfo()"  );
# Line 72  sub getMetaInfo { Line 110  sub getMetaInfo {
110  sub _initSchema {  sub _initSchema {
111    my $self = shift;    my $self = shift;
112    $logger->debug( __PACKAGE__ . "->_initSchema()" );    $logger->debug( __PACKAGE__ . "->_initSchema()" );
113    #if (!$self->{schema_tangram}) {    #if (!$schema_tangram) {
114      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} } );
115      $self->{schema_tangram} = $obj->getSchema();      $schema_tangram = $obj->getSchema();
116    #}    #}
117    if (!$self->{schema_tangram}) {    if (!$schema_tangram) {
118      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );
119      return 0;      return 0;
120    }    }
# Line 105  sub connect { Line 143  sub connect {
143    
144      # create the main tangram storage object      # create the main tangram storage object
145      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
146      $self->{COREHANDLE} = Tangram::Relational->connect( $self->{schema_tangram}, $dsn );      $self->{_COREHANDLE} = Tangram::Relational->connect( $schema_tangram, $dsn );
147    
148    #print "connect", "\n";
149    #my $core = $self->{_COREHANDLE};
150    #print Dumper($core);
151        
152      # some attempts for configuring the wrapped underlying dbi.....      # some attempts for configuring the wrapped underlying dbi.....
153      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
# Line 211  sub _configureUnderlyingStorage { Line 253  sub _configureUnderlyingStorage {
253    foreach my $key (keys %{$self->{dbi}}) {    foreach my $key (keys %{$self->{dbi}}) {
254      my $val = $self->{dbi}->{$key};      my $val = $self->{dbi}->{$key};
255      print "entry: $key; $val", "\n";      print "entry: $key; $val", "\n";
256      $self->{COREHANDLE}->{db}->{$key} = $val;      $self->{_COREHANDLE}->{db}->{$key} = $val;
257    }    }
258    #print Dumper($self->{COREHANDLE}->{db});    #print Dumper($self->{COREHANDLE}->{db});
259  }  }
# Line 227  sub configureCOREHANDLE { Line 269  sub configureCOREHANDLE {
269    
270    # apply configured modifications    # apply configured modifications
271      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
272        $self->{COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});        $self->{_COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});
273      }      }
274      if (exists $self->{dbi}->{RaiseError}) {      if (exists $self->{dbi}->{RaiseError}) {
275        $self->{COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};        $self->{_COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};
276      }      }
277      if (exists $self->{dbi}->{PrintError}) {      if (exists $self->{dbi}->{PrintError}) {
278        $self->{COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};        $self->{_COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};
279      }      }
280      if (exists $self->{dbi}->{HandleError}) {      if (exists $self->{dbi}->{HandleError}) {
281        $self->{COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};        $self->{_COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};
282      }      }
283    
284  }  }
# Line 252  sub deploySchema { Line 294  sub deploySchema {
294    my $ok;    my $ok;
295    if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {    if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
296      return unless $self->_initSchema();      return unless $self->_initSchema();
297      $ok = Tangram::Relational->deploy($self->{schema_tangram}, $dbh );      $ok = Tangram::Relational->deploy($schema_tangram, $dbh );
298      $dbh->disconnect();      $dbh->disconnect();
299    }    }
300    return $ok;    return $ok;
# Line 273  sub retreatSchema { Line 315  sub retreatSchema {
315      #use Data::Dumper; print Dumper($self);      #use Data::Dumper; print Dumper($self);
316      $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");      $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");
317            
318      $ok = Tangram::Relational->retreat($self->{schema_tangram}, $dbh );      $ok = Tangram::Relational->retreat($schema_tangram, $dbh );
319    
320      # answer "$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...
321      # - ... Tangram::Relational->retreat doesn't seem to return a valid status      # - ... Tangram::Relational->retreat doesn't seem to return a valid status
# Line 315  sub getListUnfiltered { Line 357  sub getListUnfiltered {
357    my @results;    my @results;
358    $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );    $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );
359    # get set of objects from odbms by object name    # get set of objects from odbms by object name
360    my $object_set = $self->{COREHANDLE}->remote($nodename);    my $object_set = $self->{_COREHANDLE}->remote($nodename);
361    @results = $self->{COREHANDLE}->select($object_set);    @results = $self->{_COREHANDLE}->select($object_set);
362    return \@results;    return \@results;
363  }  }
364    
# Line 361  sub getListFiltered { Line 403  sub getListFiltered {
403    my $tfilter = join(' & ', @tfilters);    my $tfilter = join(' & ', @tfilters);
404    
405    # get set of objects from odbms by object name    # get set of objects from odbms by object name
406    my $remote = $self->{COREHANDLE}->remote($nodename);    my $remote = $self->{_COREHANDLE}->remote($nodename);
407        
408    # was:    # was:
409    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);    #@results = $self->{COREHANDLE}->select($object_set, $tfilter);
410    
411    # is:    # is:
412    # 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
413    my $evalstring = 'return $self->{COREHANDLE}->select($remote, ' . $tfilter . ');';    my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';
414        
415    # get filtered list/set    # get filtered list/set
416    @results = eval($evalstring);    @results = eval($evalstring);
# Line 380  sub getListFiltered { Line 422  sub getListFiltered {
422  sub createCursor {  sub createCursor {
423    my $self = shift;    my $self = shift;
424    my $node = shift;    my $node = shift;
425    my $cmdHandle = $self->{COREHANDLE}->cursor($node);    my $cmdHandle = $self->{_COREHANDLE}->cursor($node);
426    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );    my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );
427    return $result;    return $result;
428  }  }
# Line 415  sub sendQuery { Line 457  sub sendQuery {
457      my $ident = $query->{criterias}->[0]->{val};      my $ident = $query->{criterias}->[0]->{val};
458  #print "load obj", "\n";  #print "load obj", "\n";
459      #return $self->createSet() if $ident == 5;      #return $self->createSet() if $ident == 5;
460      my $object = $self->{COREHANDLE}->load($ident);      my $object = $self->{_COREHANDLE}->load($ident);
461  #print "get id", "\n";  #print "get id", "\n";
462      my $oid = $self->{COREHANDLE}->id($object);      my $oid = $self->{_COREHANDLE}->id($object);
463      return $self->createSet($object);      return $self->createSet($object);
464      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );      #return $self->createSet( $self->{COREHANDLE}->load('300090018') );
465    }    }
# Line 446  sub sendQuery { Line 488  sub sendQuery {
488  sub eraseAll {  sub eraseAll {
489    my $self = shift;    my $self = shift;
490    my $classname = shift;    my $classname = shift;
491    my $remote = $self->{storage}->remote($classname);    my $remote = $self->{_COREHANDLE}->remote($classname);
492    my @objs = $self->{storage}->select($remote);    my @objs = $self->{_COREHANDLE}->select($remote);
493    $self->{COREHANDLE}->erase(@objs);    $self->{_COREHANDLE}->erase(@objs);
494  }  }
495    
496  sub createDb {  sub createDb {
# Line 457  sub createDb { Line 499  sub createDb {
499    return $storage->createDb();    return $storage->createDb();
500  }  }
501    
502    sub getObject {
503      my $self = shift;
504      my $oid = shift;
505      my $options = shift;
506    
507      # TODO: create a deep_unload method (currently _all_ objects are unloaded)
508      # unload($oid) will only unload object, not deep object hashes
509      $self->{_COREHANDLE}->unload() if ($options->{destroy});
510    
511      # TODO: review this
512      #if (!$self->{COREHANDLE}) { return; }
513    
514      # TODO: review this
515      my $object = eval('$self->{_COREHANDLE}->load($oid);');
516      print $@, "\n" if $@;
517    
518      return $object if $object;
519    }
520    
521    sub getObjectAsHash {
522      my $self = shift;
523      my $oid = shift;
524      my $options = shift;
525      my $obj = $self->getObject($oid, $options);
526      
527      # build options (a callback to unload autovivified objects) for 'expand'
528      # TODO: use $logger to write to debug here!
529      my $cb; # = sub {};
530    =pod
531      if ($options->{destroy}) {
532        $options->{cb}->{destroy} = sub {
533          print "================ DESTROY", "\n";
534          my $object = shift;
535          #print Dumper($object);
536          $self->{_COREHANDLE}->unload($object);
537          #undef($object);
538        };
539      }
540    =cut
541    
542      my $hash = object2hash($obj, $options);
543      #$options->{cb}->{destroy}->($obj);
544      #$self->{_COREHANDLE}->unload($obj);
545      
546      # convert values in hash to utf8 to be ready for (e.g.) encapsulation in XML
547      # now done in object2hash
548      #var2utf8($hash) if ($options->{utf8});
549      
550      # old (wrong) attempts to get rid of used instances, if requested
551        #$obj->clear_refs;
552        #$self->{COREHANDLE}->unload($obj) if($options->{destroy});
553        #$obj->DESTROY;
554        #undef($obj) if($options->{destroy});
555      
556      return $hash;
557    }
558    
559    sub getSchema {
560      return $schema_tangram;
561    }
562    
563    sub getCOREHANDLE {
564      my $self = shift;
565      return $self->{_COREHANDLE};
566    }
567    
568  1;  1;
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