/[cvs]/nfo/perl/libs/Data/Storage/Handler/Tangram.pm
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revision 1.3 by joko, Thu Oct 17 03:56:55 2002 UTC revision 1.7 by joko, Sun Dec 1 04:46:19 2002 UTC
# Line 1  Line 1 
1  #################################  ############################################
2  #  #
3  #  $Id$  #  $Id$
4  #  #
5  #  $Log$  #  $Log$
6    #  Revision 1.7  2002/12/01 04:46:19  joko
7    #  + sub eraseAll
8    #
9    #  Revision 1.6  2002/11/29 05:02:30  joko
10    #  - sub getNewPerlObjectByPkgName (moved to libp.pm)
11    #  + sub getMetaInfo
12    #  - sub existsChildNode (moved to Abstract.pm)
13    #  + sub getListUnfiltered
14    #  + sub getListFiltered
15    #  + sub createCursor
16    #  + sub createSet
17    #  + sub sendQuery
18    #
19    #  Revision 1.5  2002/11/17 06:35:18  joko
20    #  + locator metadata can now be reached via ->{locator}
21    #  - getChildNodes is now wrapped via COREHANDLE
22    #
23    #  Revision 1.4  2002/10/25 11:44:44  joko
24    #  + sub _initSchema
25    #  + sub existsChildNode
26    #  + sub testIntegrity
27    #  + sub rebuildDbAndSchema
28    #
29  #  Revision 1.3  2002/10/17 03:56:55  joko  #  Revision 1.3  2002/10/17 03:56:55  joko
30  #  + bugfix: trapped eval error  #  + bugfix: trapped eval error
31  #  #
# Line 15  Line 38 
38  #  Revision 1.1  2002/10/10 03:44:07  cvsjoko  #  Revision 1.1  2002/10/10 03:44:07  cvsjoko
39  #  + new  #  + new
40  #  #
41  #  ############################################
42  #################################  
43    
44  package Data::Storage::Handler::Tangram;  package Data::Storage::Handler::Tangram;
45    
# Line 27  use base ("Data::Storage::Handler::Abstr Line 50  use base ("Data::Storage::Handler::Abstr
50    
51  use Tangram;  use Tangram;
52  use Data::Dumper;  use Data::Dumper;
53    use libp qw( getNewPerlObjectByPkgName );
54    use Data::Storage::Result::Tangram;
55    use Data::Compare::Struct qw( isEmpty );
56    
57  # get logger instance  # get logger instance
58  my $logger = Log::Dispatch::Config->instance;  my $logger = Log::Dispatch::Config->instance;
59    
60    
61  our $metainfo = {  sub getMetaInfo {
62    'disconnectMethod' => 'disconnect',    my $self = shift;
63  };    $logger->debug( __PACKAGE__ . "->getMetaInfo()"  );
64      return {
65        'disconnectMethod' => 'disconnect',
66      };
67    }
68    
69  sub getNewPerlObjectByPkgName {  sub _initSchema {
70    my $pkgname = shift;    my $self = shift;
71    my $args = shift;    $logger->debug( __PACKAGE__ . "->_initSchema()" );
72    $logger->debug( __PACKAGE__ . "->getNewPerlObjectByPkgName( pkgname $pkgname args $args )" );    #if (!$self->{schema_tangram}) {
73    my $evstring = "use $pkgname;";      my $obj = getNewPerlObjectByPkgName($self->{locator}->{schema}, { EXPORT_OBJECTS => $self->{locator}->{classnames}, want_transactions => $self->{locator}->{want_transactions} } );
74    eval($evstring);      $self->{schema_tangram} = $obj->getSchema();
75    $@ && $logger->error( __PACKAGE__ . ':' . __LINE__ . " Error in eval: " .  $@ );    #}
76    return $pkgname->new($args);    if (!$self->{schema_tangram}) {
77        $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );
78        return 0;
79      }
80      return 1;
81  }  }
82    
83  sub connect {  sub connect {
# Line 51  sub connect { Line 85  sub connect {
85      my $self = shift;      my $self = shift;
86            
87      my $dsn = shift;      my $dsn = shift;
88      $dsn ||= $self->{dbi}->{dsn};      $dsn ||= $self->{locator}->{dbi}->{dsn};
89            
90      $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );      $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
91            
# Line 64  sub connect { Line 98  sub connect {
98  #      return;  #      return;
99  #    }  #    }
100    
101      my $obj = getNewPerlObjectByPkgName($self->{schema}, { EXPORT_OBJECTS => $self->{classnames} } );      return unless $self->_initSchema();
102      $self->{schema_tangram} = $obj->getSchema();  
103            # create the main tangram storage object
104      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );      #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
105      $self->{COREHANDLE} = Tangram::Relational->connect( $self->{schema_tangram}, $dsn );      $self->{COREHANDLE} = Tangram::Relational->connect( $self->{schema_tangram}, $dsn );
106        
107        # some attempts for configuring the wrapped underlying dbi.....
108      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();      #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
109      #$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE();      #$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE();
110      #$self->_configureUnderlyingStorage;      #$self->_configureUnderlyingStorage;
111        
112        # ..... encapsulation wins!
113      $self->configureCOREHANDLE();      $self->configureCOREHANDLE();
114    
115      $self->{locator}->{status}->{connected} = 1;
116    
117      return 1;
118    
119  }  }
120    
121  sub getChildNodes {  sub getChildNodes {
# Line 82  sub getChildNodes { Line 123  sub getChildNodes {
123    my $self = shift;    my $self = shift;
124    my @nodes;    my @nodes;
125    
126      $logger->debug( __PACKAGE__ . "->getChildNodes()" );
127    
128    # 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
129    #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} });
130    #my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} );    #my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} );
131      
132      # todo: should we retrieve information from the schema here
133      # rather than poorly getting table names from underlying dbi?
134    my $storage = $self->_getSubLayerHandle();    my $storage = $self->_getSubLayerHandle();
135      @nodes = @{$storage->getChildNodes()};
136    #$storage->_configureCOREHANDLE();    #$storage->_configureCOREHANDLE();
137    #print "getchildnodes\n";
138    #print Dumper($self);
139    #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;  
     }  
   }  
140        
141    $storage->disconnect();    $storage->disconnect();
142        
143      $self->{meta}->{childnodes} = \@nodes;
144      
145    return \@nodes;    return \@nodes;
146    
147  }  }
148    
149    
150    sub testIntegrity {
151    
152      my $self = shift;
153    
154      $logger->debug( __PACKAGE__ . "->testIntegrity()" );
155    
156      # 1st test: are there tables?
157      if (!$self->getChildNodes()) {
158        $logger->warning( __PACKAGE__ . "->testIntegrity no childnodes exist" );
159        return;
160      }
161    
162      # 2nd test: is there a table named "Tangram"?
163      if (!$self->existsChildNode("Tangram")) {
164        $logger->warning( __PACKAGE__ . "->testIntegrity childnode \"Tangram\" doesn't exist" );
165        return;
166      }
167    
168      $self->{locator}->{status}->{integrity} = 1;
169      return 1;
170    
171    }
172    
173    
174  sub _getSubLayerHandle {  sub _getSubLayerHandle {
175        
176    my $self = shift;    my $self = shift;
177        
178    use Data::Dumper;    $logger->debug( __PACKAGE__ . "->_getSubLayerHandle()" );
179    
180    #print Dumper($self);    #print Dumper($self);
181      
182    # hack, make more generic!    # hack, make more generic!
183    if (!$self->{STORAGE_SUBLAYER}) {    if (!$self->{dataStorageLayer}) {
184      my $loc = Data::Storage::Locator->new( type => "DBI", dbi => $self->{dbi}, COREHANDLE => $self->{COREHANDLE}->{db} );      $logger->debug( __PACKAGE__ . "->_getSubLayerHandle() creating new dataStorageLayer" );
185      $self->{STORAGE_SUBLAYER} = Data::Storage->new( $loc, { protected => 1 } );      #my $loc = Data::Storage::Locator->new( type => "DBI", dbi => $self->{dbi}, COREHANDLE => $self->{COREHANDLE}->{db} );
186        my $loc = Data::Storage::Locator->new( { type => "DBI", dbi => $self->{locator}->{dbi} } );
187        $self->{dataStorageLayer} = Data::Storage->new( $loc, { protected => 1 } );
188      #$self->{STORAGE_UNDER_THE_HOOD}->{STORAGEHANDLE}->_configureCOREHANDLE();      #$self->{STORAGE_UNDER_THE_HOOD}->{STORAGEHANDLE}->_configureCOREHANDLE();
189      #$self->{STORAGE_UNDER_THE_HOOD}->_configureCOREHANDLE();      #$self->{STORAGE_UNDER_THE_HOOD}->_configureCOREHANDLE();
190    }    }
191        
192    #print Dumper($self->{STORAGE_UNDER_THE_HOOD});    #print Dumper($self->{STORAGE_UNDER_THE_HOOD});
193        
194    return $self->{STORAGE_SUBLAYER};    return $self->{dataStorageLayer};
195        
196  }  }
197    
198  sub _configureUnderlyingStorage {  sub _configureUnderlyingStorage {
199        
200    my $self = shift;    my $self = shift;
201    
202      $logger->debug( __PACKAGE__ . "->_configureUnderlyingStorage" );
203    
204    $self->_configureCOREHANDLE_DBI();    $self->_configureCOREHANDLE_DBI();
205    return;    return;
206        
# Line 142  sub configureCOREHANDLE { Line 217  sub configureCOREHANDLE {
217    
218    my $self = shift;    my $self = shift;
219    
220    $logger->debug( __PACKAGE__ . "->_configureCOREHANDLE" );    $logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );
221    
222    #my $subLayer = $self->_getSubLayerHandle();    #my $subLayer = $self->_getSubLayerHandle();
223    
# Line 164  sub configureCOREHANDLE { Line 239  sub configureCOREHANDLE {
239    
240  sub deploySchema {  sub deploySchema {
241    my $self = shift;    my $self = shift;
242    #my $dsn = $self->{locator}->{dbi}->{dsn};    my $args = shift;
243    my $dsn = $self->{dbi}->{dsn};    
244      my $dsn = $self->{locator}->{dbi}->{dsn};
245      #my $dsn = $self->{dbi}->{dsn};
246    
247      $logger->debug( __PACKAGE__ . "->deploySchema( dsn $dsn )" );
248    
249    my $ok;    my $ok;
250      # TODO: is this DBI->connect okay here like it is? regarding errors.....???
251    if ( my $dbh = DBI->connect($dsn, '', '', {    if ( my $dbh = DBI->connect($dsn, '', '', {
252                                                        PrintError => 0,                                                        PrintError => 0,
253                                                      } ) ) {                                                      } ) ) {
254      $ok = Tangram::Relational->deploy($self->{schema}, $dbh );  
255        return unless $self->_initSchema();
256        
257        $ok = Tangram::Relational->deploy($self->{schema_tangram}, $dbh );
258      $dbh->disconnect();      $dbh->disconnect();
259    }    }
260    return $ok;    return $ok;
261  }  }
262    
263  sub retreatSchema {  sub retreatSchema {
264    print "retreat\n";  
265    my $self = shift;    my $self = shift;
266    #my $dsn = $self->{locator}->{dbi}->{dsn};    my $dsn = $self->{locator}->{dbi}->{dsn};
267    my $dsn = $self->{dbi}->{dsn};    #my $dsn = $self->{dbi}->{dsn};
268    
269      $logger->debug( __PACKAGE__ . "->retreatSchema( dsn $dsn )" );
270    
271    my $ok;    my $ok;
272    if ( my $dbh = DBI->connect($dsn, '', '', {    if ( my $dbh = DBI->connect($dsn, '', '', {
273                                                        PrintError => 0,                                                        #PrintError => 0,
274                                                          #RaiseError => 0,
275                                                      } ) ) {                                                      } ) ) {
276      $ok = Tangram::Relational->retreat($self->{schema}, $dbh );  
277        return unless $self->_initSchema();
278        
279        #use Data::Dumper; print Dumper($self);
280        $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");
281        
282        $ok = Tangram::Relational->retreat($self->{schema_tangram}, $dbh );
283        $ok = 2;    # answer is "maybe" for now since Tangram::Relational->retreat doesn't seem to return a valid status
284                        # idea: test this by checking for count of tables in database -
285                        #          problem with this: there may be some left not having been included to the schema
286      $dbh->disconnect();      $dbh->disconnect();
287    }    }
288    return $ok;    return $ok;
289  }  }
290    
291    sub rebuildDbAndSchema {
292      my $self = shift;
293      $logger->info( __PACKAGE__ . "->rebuildDbAndSchema()" );
294      my @results;
295    
296      # sum up results (bool (0/1)) in array
297      push @results, $self->retreatSchema();
298      push @results, $self->{dataStorageLayer}->dropDb();
299      push @results, $self->{dataStorageLayer}->createDb();
300      push @results, $self->deploySchema();
301    
302      # scan array for "bad ones"
303      my $res = 1;
304      map {
305        $res = 0 if (!$_);
306      } @results;
307      
308      return $res;
309    }
310    
311    sub getListUnfiltered {
312      my $self = shift;
313      my $nodename = shift;
314      my @results;
315      $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );
316      # get set of objects from odbms by object name
317      my $object_set = $self->{COREHANDLE}->remote($nodename);
318      @results = $self->{COREHANDLE}->select($object_set);
319      return \@results;
320    }
321    
322    sub getListFiltered {
323      my $self = shift;
324    
325      # redirect to unfiltered mode
326      #return $self->getListUnfiltered(@_);
327    
328      my $nodename = shift;
329      my $filters = shift;
330      my @results;
331      $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );
332    
333      #print Dumper($filters);
334      
335      my @tfilters;
336      
337      foreach my $filter (@$filters) {
338      
339        # get filter - TODO: for each filter
340        #my $filter = $filters->[0];
341      
342        # build filter
343        my $lexpr = $filter->{key};
344        #my $op = $filter->{op};
345        my $op = '=';
346        my $rexpr = $filter->{val};
347        my $tight = 100;
348        
349      #  my $tfilter = Tangram::Filter->new(
350      #    expr => "t1.$lexpr $op '$rexpr'",
351      #    tight => $tight,
352      #    objects => $objects,
353      #  );
354      
355        # HACK: build eval-string (sorry) to get filtered list - please give advice here
356        push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
357    
358      }
359    
360      my $tfilter = join(' & ', @tfilters);
361    
362      # get set of objects from odbms by object name
363      my $remote = $self->{COREHANDLE}->remote($nodename);
364      
365      # was:
366      #@results = $self->{COREHANDLE}->select($object_set, $tfilter);
367    
368      # is:
369      # HACK: build eval-string (sorry) to get filtered list - please give advice here
370      my $evalstring = 'return $self->{COREHANDLE}->select($remote, ' . $tfilter . ');';
371      
372      # get filtered list/set
373      @results = eval($evalstring);
374      die $@ if $@;
375      
376      return \@results;
377    }
378    
379    sub createCursor {
380      my $self = shift;
381      my $node = shift;
382      my $cmdHandle = $self->{COREHANDLE}->cursor($node);
383      my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );
384      return $result;
385    }
386    
387    sub createSet {
388      my $self = shift;
389      my @objects = @_;
390      my $rh = Set::Object->new();
391      foreach (@objects) {
392        #print Dumper($_);
393        $rh->insert($_) if !isEmpty($_);
394      }
395      #print Dumper($rh->members());
396      my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
397      return $result;
398    }
399    
400    sub sendQuery {
401      my $self = shift;
402      my $query = shift;
403      #my $sql = "SELECT cs FROM $self->{metainfo}->{$descent}->{node} WHERE $self->{metainfo}->{$descent}->{IdentProvider}->{arg}='$self->{entry}->{source}->{ident}';";
404      #my $result = $self->{metainfo}->{$descent}->{storage}->sendCommand($sql);
405    
406      #print Dumper($query);
407    
408      # HACK: special case: querying by id does not translate into a common tangram query
409      # just load the object by given id(ent)
410      if ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq') {
411        #print "LOAD!!!", "\n";
412        #exit;
413        #return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );
414        my $ident = $query->{criterias}->[0]->{val};
415    #print "load obj", "\n";
416        #return $self->createSet() if $ident == 5;
417        my $object = $self->{COREHANDLE}->load($ident);
418    #print "get id", "\n";
419        my $oid = $self->{COREHANDLE}->id($object);
420        return $self->createSet($object);
421        #return $self->createSet( $self->{COREHANDLE}->load('300090018') );
422      }
423    
424      die("This should not be reached for now - redirect to \$self->getListFiltered() here!");
425    
426      # TODO: do a common tangram query here
427    
428      my @crits;
429      foreach (@{$query->{criterias}}) {
430        my $op = '';
431        $op = '=' if lc $_->{op} eq 'eq';
432        push @crits, "$_->{key}$op'$_->{val}'";
433      }
434      my $subnodes = {};
435      map { $subnodes->{$_}++ } @{$query->{subnodes}};
436      # HACK: this is hardcoded ;(    expand possibilities!
437      #my $crit = join(' AND ', @crits);
438      #my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);
439      #return $self->sendCommand($sql);
440      #my $h = $self->{COREHANDLE}->remote($query->{node});
441      #my $res = $self->{COREHANDLE}->select($h, $h->{);
442      return $self->createCursor($query->{node});
443    }
444    
445    sub eraseAll {
446      my $self = shift;
447      my $classname = shift;
448      my $remote = $self->{storage}->remote($classname);
449      my @objs = $self->{storage}->select($remote);
450      $self->{COREHANDLE}->erase(@objs);
451    }
452    
453  1;  1;
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