/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.4 by joko, Fri Oct 25 11:44:44 2002 UTC revision 1.13 by joko, Thu Dec 5 07:59:04 2002 UTC
# Line 1  Line 1 
1  #################################  ############################################
2  #  #
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.13  2002/12/05 07:59:04  joko
7    #  + now using Tie::SecureHash as a base for the COREHANDLE
8    #  + former public COREHANDLE becomes private _COREHANDLE now
9    #  + sub getCOREHANDLE
10    #
11    #  Revision 1.12  2002/12/04 11:34:49  joko
12    #  - $schema_tangram doesn't have to be in class?
13    #
14    #  Revision 1.11  2002/12/04 08:54:08  jonen
15    #  + untested bugfix: undef($object) after transform to hash at getObjectAsHash
16    #
17    #  Revision 1.10  2002/12/03 15:53:23  joko
18    #  + small bugfix regarding object hierarchy
19    #
20    #  Revision 1.9  2002/12/03 05:29:40  joko
21    #  + sub getObject
22    #  + sub getObjectAsHash
23    #
24    #  Revision 1.8  2002/12/01 22:25:51  joko
25    #  + now utilizing metadata from storage locator when connecting to DBI in "raw"-mode
26    #
27    #  Revision 1.7  2002/12/01 04:46:19  joko
28    #  + sub eraseAll
29    #
30    #  Revision 1.6  2002/11/29 05:02:30  joko
31    #  - sub getNewPerlObjectByPkgName (moved to libp.pm)
32    #  + sub getMetaInfo
33    #  - sub existsChildNode (moved to Abstract.pm)
34    #  + sub getListUnfiltered
35    #  + sub getListFiltered
36    #  + sub createCursor
37    #  + sub createSet
38    #  + sub sendQuery
39    #
40    #  Revision 1.5  2002/11/17 06:35:18  joko
41    #  + locator metadata can now be reached via ->{locator}
42    #  - getChildNodes is now wrapped via COREHANDLE
43    #
44  #  Revision 1.4  2002/10/25 11:44:44  joko  #  Revision 1.4  2002/10/25 11:44:44  joko
45  #  + sub _initSchema  #  + sub _initSchema
46  #  + sub existsChildNode  #  + sub existsChildNode
# Line 21  Line 59 
59  #  Revision 1.1  2002/10/10 03:44:07  cvsjoko  #  Revision 1.1  2002/10/10 03:44:07  cvsjoko
60  #  + new  #  + new
61  #  #
62  #  ############################################
63  #################################  
64    
65  package Data::Storage::Handler::Tangram;  package Data::Storage::Handler::Tangram;
66    
67  use strict;  use strict;
68  use warnings;  use warnings;
69    
70    use base ("Data::Storage::Handler");
71  use base ("Data::Storage::Handler::Abstract");  use base ("Data::Storage::Handler::Abstract");
72    
73  use Tangram;  use Tangram;
74  use Data::Dumper;  use Data::Dumper;
75    use libp qw( getNewPerlObjectByPkgName );
76    use Data::Storage::Result::Tangram;
77    use Data::Compare::Struct qw( isEmpty );
78    use Data::Transform::Deep qw( var_deref );
79    use Data::Transform::Encode qw( var2utf8 );
80    
81    
82  # get logger instance  # get logger instance
83  my $logger = Log::Dispatch::Config->instance;  my $logger = Log::Dispatch::Config->instance;
84    
85    
86  our $metainfo = {  # this holds the complete instantiated schema from tangram
87    'disconnectMethod' => 'disconnect',  my $schema_tangram;
 };  
88    
89  sub getNewPerlObjectByPkgName {  sub getMetaInfo {
90    my $pkgname = shift;    my $self = shift;
91    my $args = shift;    $logger->debug( __PACKAGE__ . "->getMetaInfo()"  );
92    $logger->debug( __PACKAGE__ . "->getNewPerlObjectByPkgName( pkgname $pkgname args $args )" );    return {
93    my $evstring = "use $pkgname;";      'disconnectMethod' => 'disconnect',
94    eval($evstring);    };
   $@ && $logger->error( __PACKAGE__ . ':' . __LINE__ . " Error in eval: " .  $@ );  
   return $pkgname->new($args);  
95  }  }
96    
97  sub _initSchema {  sub _initSchema {
98    my $self = shift;    my $self = shift;
99    $logger->debug( __PACKAGE__ . "->_initSchema()" );    $logger->debug( __PACKAGE__ . "->_initSchema()" );
100    #if (!$self->{schema_tangram}) {    #if (!$schema_tangram) {
101      my $obj = getNewPerlObjectByPkgName($self->{schema}, { EXPORT_OBJECTS => $self->{classnames} } );      my $obj = getNewPerlObjectByPkgName($self->{locator}->{schema}, { EXPORT_OBJECTS => $self->{locator}->{classnames}, want_transactions => $self->{locator}->{want_transactions} } );
102      $self->{schema_tangram} = $obj->getSchema();      $schema_tangram = $obj->getSchema();
103    #}    #}
104    if (!$self->{schema_tangram}) {    if (!$schema_tangram) {
105      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );      $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );
106      return 0;      return 0;
107    }    }
# Line 71  sub connect { Line 113  sub connect {
113      my $self = shift;      my $self = shift;
114            
115      my $dsn = shift;      my $dsn = shift;
116      $dsn ||= $self->{dbi}->{dsn};      $dsn ||= $self->{locator}->{dbi}->{dsn};
117            
118      $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );      $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
119            
# Line 86  sub connect { Line 128  sub connect {
128    
129      return unless $self->_initSchema();      return unless $self->_initSchema();
130    
131        # create the main tangram storage object
132      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
133      $self->{COREHANDLE} = Tangram::Relational->connect( $self->{schema_tangram}, $dsn );      $self->{_COREHANDLE} = Tangram::Relational->connect( $schema_tangram, $dsn );
134    
135    #print "connect", "\n";
136    #my $core = $self->{_COREHANDLE};
137    #print Dumper($core);
138        
139        # some attempts for configuring the wrapped underlying dbi.....
140      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
141      #$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE();      #$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE();
142      #$self->_configureUnderlyingStorage;      #$self->_configureUnderlyingStorage;
143        
144        # ..... encapsulation wins!
145      $self->configureCOREHANDLE();      $self->configureCOREHANDLE();
146    
147      $self->{locator}->{status}->{connected} = 1;
148    
149    return 1;    return 1;
150    
151  }  }
# Line 108  sub getChildNodes { Line 160  sub getChildNodes {
160    # create new DBI - Data::Storage - object from already connected DBI::db - handle inside the current COREHANDLE    # create new DBI - Data::Storage - object from already connected DBI::db - handle inside the current COREHANDLE
161    #my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} });    #my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} });
162    #my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} );    #my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} );
163      
164      # todo: should we retrieve information from the schema here
165      # rather than poorly getting table names from underlying dbi?
166    my $storage = $self->_getSubLayerHandle();    my $storage = $self->_getSubLayerHandle();
167      @nodes = @{$storage->getChildNodes()};
168    #$storage->_configureCOREHANDLE();    #$storage->_configureCOREHANDLE();
169    #print "getchildnodes\n";
170    #print Dumper($self);
171    #if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {    #if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
   if (my $result = $storage->sendCommand( 'SHOW TABLES;' ) ) {  
     while ( my $row = $result->_getNextEntry() ) {  
       push @nodes, $row;  
     }  
   }  
172        
173    $storage->disconnect();    # TODO: REVIEW
174      #$storage->disconnect();
175        
176    $self->{meta}->{childnodes} = \@nodes;    $self->{meta}->{childnodes} = \@nodes;
177        
# Line 127  sub getChildNodes { Line 180  sub getChildNodes {
180  }  }
181    
182    
 sub existsChildNode {  
   my $self = shift;  
   my $nodename = shift;  
   $logger->debug( __PACKAGE__ . "->getChildNode( nodename $nodename )" );  
   $self->getChildNodes() unless $self->{meta}->{childnodes};  
   return grep $nodename, @{$self->{meta}->{childnodes}};  
 }  
   
   
183  sub testIntegrity {  sub testIntegrity {
184    
185    my $self = shift;    my $self = shift;
# Line 154  sub testIntegrity { Line 198  sub testIntegrity {
198      return;      return;
199    }    }
200    
201      $self->{locator}->{status}->{integrity} = 1;
202    return 1;    return 1;
203    
204  }  }
# Line 165  sub _getSubLayerHandle { Line 210  sub _getSubLayerHandle {
210        
211    $logger->debug( __PACKAGE__ . "->_getSubLayerHandle()" );    $logger->debug( __PACKAGE__ . "->_getSubLayerHandle()" );
212    
   use Data::Dumper;  
213    #print Dumper($self);    #print Dumper($self);
214    #exit;  
     
215    # hack, make more generic!    # hack, make more generic!
216    if (!$self->{dataStorageLayer}) {    if (!$self->{dataStorageLayer}) {
217      $logger->debug( __PACKAGE__ . "->_getSubLayerHandle() creating new dataStorageLayer" );      $logger->debug( __PACKAGE__ . "->_getSubLayerHandle() creating new dataStorageLayer" );
218      #my $loc = Data::Storage::Locator->new( type => "DBI", dbi => $self->{dbi}, COREHANDLE => $self->{COREHANDLE}->{db} );      #my $loc = Data::Storage::Locator->new( type => "DBI", dbi => $self->{dbi}, COREHANDLE => $self->{COREHANDLE}->{db} );
219      my $loc = Data::Storage::Locator->new( type => "DBI", dbi => $self->{dbi} );      my $loc = Data::Storage::Locator->new( { type => "DBI", dbi => $self->{locator}->{dbi} } );
220      $self->{dataStorageLayer} = Data::Storage->new( $loc, { protected => 1 } );      $self->{dataStorageLayer} = Data::Storage->new( $loc, { protected => 1 } );
221      #$self->{STORAGE_UNDER_THE_HOOD}->{STORAGEHANDLE}->_configureCOREHANDLE();      #$self->{STORAGE_UNDER_THE_HOOD}->{STORAGEHANDLE}->_configureCOREHANDLE();
222      #$self->{STORAGE_UNDER_THE_HOOD}->_configureCOREHANDLE();      #$self->{STORAGE_UNDER_THE_HOOD}->_configureCOREHANDLE();
# Line 197  sub _configureUnderlyingStorage { Line 240  sub _configureUnderlyingStorage {
240    foreach my $key (keys %{$self->{dbi}}) {    foreach my $key (keys %{$self->{dbi}}) {
241      my $val = $self->{dbi}->{$key};      my $val = $self->{dbi}->{$key};
242      print "entry: $key; $val", "\n";      print "entry: $key; $val", "\n";
243      $self->{COREHANDLE}->{db}->{$key} = $val;      $self->{_COREHANDLE}->{db}->{$key} = $val;
244    }    }
245    #print Dumper($self->{COREHANDLE}->{db});    #print Dumper($self->{COREHANDLE}->{db});
246  }  }
# Line 213  sub configureCOREHANDLE { Line 256  sub configureCOREHANDLE {
256    
257    # apply configured modifications    # apply configured modifications
258      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {      if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
259        $self->{COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});        $self->{_COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});
260      }      }
261      if (exists $self->{dbi}->{RaiseError}) {      if (exists $self->{dbi}->{RaiseError}) {
262        $self->{COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};        $self->{_COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};
263      }      }
264      if (exists $self->{dbi}->{PrintError}) {      if (exists $self->{dbi}->{PrintError}) {
265        $self->{COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};        $self->{_COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};
266      }      }
267      if (exists $self->{dbi}->{HandleError}) {      if (exists $self->{dbi}->{HandleError}) {
268        $self->{COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};        $self->{_COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};
269      }      }
270    
271  }  }
272    
273  sub deploySchema {  sub deploySchema {
274    my $self = shift;    my $self = shift;
275    #my $dsn = $self->{locator}->{dbi}->{dsn};    my $args = shift;
276    my $dsn = $self->{dbi}->{dsn};    
277      my $dsn = $self->{locator}->{dbi}->{dsn};
278    
279    $logger->debug( __PACKAGE__ . "->deploySchema( dsn $dsn )" );    $logger->debug( __PACKAGE__ . "->deploySchema( dsn $dsn )" );
280    
281    my $ok;    my $ok;
282    if ( my $dbh = DBI->connect($dsn, '', '', {    if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
                                                       PrintError => 0,  
                                                     } ) ) {  
   
283      return unless $self->_initSchema();      return unless $self->_initSchema();
284            $ok = Tangram::Relational->deploy($schema_tangram, $dbh );
     $ok = Tangram::Relational->deploy($self->{schema_tangram}, $dbh );  
285      $dbh->disconnect();      $dbh->disconnect();
286    }    }
287    return $ok;    return $ok;
# Line 250  sub deploySchema { Line 290  sub deploySchema {
290  sub retreatSchema {  sub retreatSchema {
291    
292    my $self = shift;    my $self = shift;
293    #my $dsn = $self->{locator}->{dbi}->{dsn};    my $dsn = $self->{locator}->{dbi}->{dsn};
   my $dsn = $self->{dbi}->{dsn};  
294    
295    $logger->debug( __PACKAGE__ . "->retreatSchema( dsn $dsn )" );    $logger->debug( __PACKAGE__ . "->retreatSchema( dsn $dsn )" );
296    
297    my $ok;    my $ok;
298    if ( my $dbh = DBI->connect($dsn, '', '', {    if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
                                                       #PrintError => 0,  
                                                       #RaiseError => 0,  
                                                     } ) ) {  
299    
300      return unless $self->_initSchema();      return unless $self->_initSchema();
301            
302      #use Data::Dumper; print Dumper($self);      #use Data::Dumper; print Dumper($self);
303      $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");      $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");
304            
305      $ok = Tangram::Relational->retreat($self->{schema_tangram}, $dbh );      $ok = Tangram::Relational->retreat($schema_tangram, $dbh );
306      $ok = 2;    # answer is "maybe" for now since Tangram::Relational->retreat doesn't seem to return a valid status  
307                      # idea: test this by checking for count of tables in database -      # answer "$ok=2" means "maybe" for now - we have to patch this to a constant here because...
308                      #          problem with this: there may be some left not having been included to the schema      # - ... Tangram::Relational->retreat doesn't seem to return a valid status
309        # - possible improvement:
310        #   - test this by checking for count of tables in database
311        #   - problem with this: there may be some left not having been included to the schema
312        #   - maybe better: use "->getChildNodes"?
313        $ok = 2;
314    
315      $dbh->disconnect();      $dbh->disconnect();
316    
317    }    }
318    return $ok;    return $ok;
319  }  }
# Line 295  sub rebuildDbAndSchema { Line 338  sub rebuildDbAndSchema {
338    return $res;    return $res;
339  }  }
340    
341    sub getListUnfiltered {
342      my $self = shift;
343      my $nodename = shift;
344      my @results;
345      $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );
346      # get set of objects from odbms by object name
347      my $object_set = $self->{_COREHANDLE}->remote($nodename);
348      @results = $self->{_COREHANDLE}->select($object_set);
349      return \@results;
350    }
351    
352    sub getListFiltered {
353      my $self = shift;
354    
355      # redirect to unfiltered mode
356      #return $self->getListUnfiltered(@_);
357    
358      my $nodename = shift;
359      my $filters = shift;
360      my @results;
361      $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );
362    
363      #print Dumper($filters);
364      
365      my @tfilters;
366      
367      foreach my $filter (@$filters) {
368      
369        # get filter - TODO: for each filter
370        #my $filter = $filters->[0];
371      
372        # build filter
373        my $lexpr = $filter->{key};
374        #my $op = $filter->{op};
375        my $op = '=';
376        my $rexpr = $filter->{val};
377        my $tight = 100;
378        
379      #  my $tfilter = Tangram::Filter->new(
380      #    expr => "t1.$lexpr $op '$rexpr'",
381      #    tight => $tight,
382      #    objects => $objects,
383      #  );
384      
385        # HACK: build eval-string (sorry) to get filtered list - please give advice here
386        push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
387    
388      }
389    
390      my $tfilter = join(' & ', @tfilters);
391    
392      # get set of objects from odbms by object name
393      my $remote = $self->{_COREHANDLE}->remote($nodename);
394      
395      # was:
396      #@results = $self->{COREHANDLE}->select($object_set, $tfilter);
397    
398      # is:
399      # HACK: build eval-string (sorry) to get filtered list - please give advice here
400      my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';
401      
402      # get filtered list/set
403      @results = eval($evalstring);
404      die $@ if $@;
405      
406      return \@results;
407    }
408    
409    sub createCursor {
410      my $self = shift;
411      my $node = shift;
412      my $cmdHandle = $self->{_COREHANDLE}->cursor($node);
413      my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );
414      return $result;
415    }
416    
417    sub createSet {
418      my $self = shift;
419      my @objects = @_;
420      my $rh = Set::Object->new();
421      foreach (@objects) {
422        #print Dumper($_);
423        $rh->insert($_) if !isEmpty($_);
424      }
425      #print Dumper($rh->members());
426      my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
427      return $result;
428    }
429    
430    sub sendQuery {
431      my $self = shift;
432      my $query = shift;
433      #my $sql = "SELECT cs FROM $self->{metainfo}->{$descent}->{node} WHERE $self->{metainfo}->{$descent}->{IdentProvider}->{arg}='$self->{entry}->{source}->{ident}';";
434      #my $result = $self->{metainfo}->{$descent}->{storage}->sendCommand($sql);
435    
436      #print Dumper($query);
437    
438      # HACK: special case: querying by id does not translate into a common tangram query
439      # just load the object by given id(ent)
440      if ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq') {
441        #print "LOAD!!!", "\n";
442        #exit;
443        #return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );
444        my $ident = $query->{criterias}->[0]->{val};
445    #print "load obj", "\n";
446        #return $self->createSet() if $ident == 5;
447        my $object = $self->{_COREHANDLE}->load($ident);
448    #print "get id", "\n";
449        my $oid = $self->{_COREHANDLE}->id($object);
450        return $self->createSet($object);
451        #return $self->createSet( $self->{COREHANDLE}->load('300090018') );
452      }
453    
454      die("This should not be reached for now - redirect to \$self->getListFiltered() here!");
455    
456      # TODO: do a common tangram query here
457    
458      my @crits;
459      foreach (@{$query->{criterias}}) {
460        my $op = '';
461        $op = '=' if lc $_->{op} eq 'eq';
462        push @crits, "$_->{key}$op'$_->{val}'";
463      }
464      my $subnodes = {};
465      map { $subnodes->{$_}++ } @{$query->{subnodes}};
466      # HACK: this is hardcoded ;(    expand possibilities!
467      #my $crit = join(' AND ', @crits);
468      #my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);
469      #return $self->sendCommand($sql);
470      #my $h = $self->{COREHANDLE}->remote($query->{node});
471      #my $res = $self->{COREHANDLE}->select($h, $h->{);
472      return $self->createCursor($query->{node});
473    }
474    
475    sub eraseAll {
476      my $self = shift;
477      my $classname = shift;
478      my $remote = $self->{_COREHANDLE}->remote($classname);
479      my @objs = $self->{_COREHANDLE}->select($remote);
480      $self->{_COREHANDLE}->erase(@objs);
481    }
482    
483    sub createDb {
484      my $self = shift;
485      my $storage = $self->_getSubLayerHandle();
486      return $storage->createDb();
487    }
488    
489    sub getObject {
490      my $self = shift;
491      my $oid = shift;
492      # TODO: review this
493      #if (!$self->{COREHANDLE}) { return; }
494      return $self->{_COREHANDLE}->load($oid);
495    }
496    
497    sub getObjectAsHash {
498      my $self = shift;
499      my $oid = shift;
500      my $options = shift;
501      my $obj = $self->getObject($oid);
502      my $deref = var_deref($obj);
503      var2utf8($deref) if ($options->{utf8});
504      undef($obj) if($options->{destroy});
505      return $deref;
506    }
507    
508    sub getSchema {
509      return $schema_tangram;
510    }
511    
512    sub getCOREHANDLE {
513      my $self = shift;
514      return $self->{_COREHANDLE};
515    }
516    
517  1;  1;
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