Storage/Handler/Tangram.pm

############################################
#
#  $Id: Tangram.pm,v 1.9 2002/12/03 05:29:40 joko Exp $
#
#  $Log: Tangram.pm,v $
#  Revision 1.9  2002/12/03 05:29:40  joko
#  + sub getObject
#  + sub getObjectAsHash
#
#  Revision 1.8  2002/12/01 22:25:51  joko
#  + now utilizing metadata from storage locator when connecting to DBI in "raw"-mode
#
#  Revision 1.7  2002/12/01 04:46:19  joko
#  + sub eraseAll
#
#  Revision 1.6  2002/11/29 05:02:30  joko
#  - sub getNewPerlObjectByPkgName (moved to libp.pm)
#  + sub getMetaInfo
#  - sub existsChildNode (moved to Abstract.pm)
#  + sub getListUnfiltered
#  + sub getListFiltered
#  + sub createCursor
#  + sub createSet
#  + sub sendQuery
#
#  Revision 1.5  2002/11/17 06:35:18  joko
#  + locator metadata can now be reached via ->{locator}
#  - getChildNodes is now wrapped via COREHANDLE
#
#  Revision 1.4  2002/10/25 11:44:44  joko
#  + sub _initSchema
#  + sub existsChildNode
#  + sub testIntegrity
#  + sub rebuildDbAndSchema
#
#  Revision 1.3  2002/10/17 03:56:55  joko
#  + bugfix: trapped eval error
#
#  Revision 1.2  2002/10/17 00:10:05  joko
#  + removed dependency from tsobj.pm, schema is now independent
#  + sub getNewPerlObjectByPkgName
#  + sub deploySchema
#  + sub retreatSchema
#
#  Revision 1.1  2002/10/10 03:44:07  cvsjoko
#  + new
#
############################################


package Data::Storage::Handler::Tangram;

use strict;
use warnings;

use base ("Data::Storage::Handler::Abstract");

use Tangram;
use Data::Dumper;
use libp qw( getNewPerlObjectByPkgName );
use Data::Storage::Result::Tangram;
use Data::Compare::Struct qw( isEmpty );
use Data::Transform::Deep qw( var_deref );
use Data::Transform::Encode qw( var2utf8 );


# get logger instance
my $logger = Log::Dispatch::Config->instance;


sub getMetaInfo {
  my $self = shift;
  $logger->debug( __PACKAGE__ . "->getMetaInfo()"  );
  return {
    'disconnectMethod' => 'disconnect',
  };
}

sub _initSchema {
  my $self = shift;
  $logger->debug( __PACKAGE__ . "->_initSchema()" );
  #if (!$self->{schema_tangram}) {
    my $obj = getNewPerlObjectByPkgName($self->{locator}->{schema}, { EXPORT_OBJECTS => $self->{locator}->{classnames}, want_transactions => $self->{locator}->{want_transactions} } );
    $self->{schema_tangram} = $obj->getSchema();
  #}
  if (!$self->{schema_tangram}) {
    $logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );
    return 0;
  }
  return 1;
}

sub connect {

    my $self = shift;
    
    my $dsn = shift;
    $dsn ||= $self->{locator}->{dbi}->{dsn};
    
    $logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
    
    #my $storage = Tangram::Relational->connect( $schema, $dsn );
    #my $storage = Tangram::mysql->connect( $schema, $dsn );
    #$storage = Tangram::Relational->connect( Project->schema, $dsn );
    
#    if (!testDsn($dsn)) {
#      croak("Database at \"$dsn\" is not available");
#      return;
#    }

    return unless $self->_initSchema();

    # create the main tangram storage object
    #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
    $self->{COREHANDLE} = Tangram::Relational->connect( $self->{schema_tangram}, $dsn );
  
    # some attempts for configuring the wrapped underlying dbi.....
    #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
    #$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE();
    #$self->_configureUnderlyingStorage;
    
    # ..... encapsulation wins!
    $self->configureCOREHANDLE();

  $self->{locator}->{status}->{connected} = 1;

  return 1;

}

sub getChildNodes {

  my $self = shift;
  my @nodes;

  $logger->debug( __PACKAGE__ . "->getChildNodes()" );

  # create new DBI - Data::Storage - object from already connected DBI::db - handle inside the current COREHANDLE
  #my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} });
  #my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} );
  
  # todo: should we retrieve information from the schema here
  # rather than poorly getting table names from underlying dbi?
  my $storage = $self->_getSubLayerHandle();
  @nodes = @{$storage->getChildNodes()};
  #$storage->_configureCOREHANDLE();
#print "getchildnodes\n";
#print Dumper($self);
  #if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
  
  # TODO: REVIEW
  #$storage->disconnect();
  
  $self->{meta}->{childnodes} = \@nodes;
  
  return \@nodes;

}


sub testIntegrity {

  my $self = shift;

  $logger->debug( __PACKAGE__ . "->testIntegrity()" );

  # 1st test: are there tables?
  if (!$self->getChildNodes()) {
    $logger->warning( __PACKAGE__ . "->testIntegrity no childnodes exist" );
    return;
  }

  # 2nd test: is there a table named "Tangram"?
  if (!$self->existsChildNode("Tangram")) {
    $logger->warning( __PACKAGE__ . "->testIntegrity childnode \"Tangram\" doesn't exist" );
    return;
  }

  $self->{locator}->{status}->{integrity} = 1;
  return 1;

}


sub _getSubLayerHandle {
  
  my $self = shift;
  
  $logger->debug( __PACKAGE__ . "->_getSubLayerHandle()" );

  #print Dumper($self);

  # hack, make more generic!
  if (!$self->{dataStorageLayer}) {
    $logger->debug( __PACKAGE__ . "->_getSubLayerHandle() creating new dataStorageLayer" );
    #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->{locator}->{dbi} } );
    $self->{dataStorageLayer} = Data::Storage->new( $loc, { protected => 1 } );
    #$self->{STORAGE_UNDER_THE_HOOD}->{STORAGEHANDLE}->_configureCOREHANDLE();
    #$self->{STORAGE_UNDER_THE_HOOD}->_configureCOREHANDLE();
  }
  
  #print Dumper($self->{STORAGE_UNDER_THE_HOOD});
  
  return $self->{dataStorageLayer};
  
}

sub _configureUnderlyingStorage {
  
  my $self = shift;

  $logger->debug( __PACKAGE__ . "->_configureUnderlyingStorage" );

  $self->_configureCOREHANDLE_DBI();
  return;
  
  foreach my $key (keys %{$self->{dbi}}) {
    my $val = $self->{dbi}->{$key};
    print "entry: $key; $val", "\n";
    $self->{COREHANDLE}->{db}->{$key} = $val;
  }
  #print Dumper($self->{COREHANDLE}->{db});
}


sub configureCOREHANDLE {

  my $self = shift;

  $logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );

  #my $subLayer = $self->_getSubLayerHandle();

  # apply configured modifications
    if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
      $self->{COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});
    }
    if (exists $self->{dbi}->{RaiseError}) {
      $self->{COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};
    }
    if (exists $self->{dbi}->{PrintError}) {
      $self->{COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};
    }
    if (exists $self->{dbi}->{HandleError}) {
      $self->{COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};
    }

}

sub deploySchema {
  my $self = shift;
  my $args = shift;
  
  my $dsn = $self->{locator}->{dbi}->{dsn};

  $logger->debug( __PACKAGE__ . "->deploySchema( dsn $dsn )" );

  my $ok;
  if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
    return unless $self->_initSchema();
    $ok = Tangram::Relational->deploy($self->{schema_tangram}, $dbh );
    $dbh->disconnect();
  }
  return $ok;
}

sub retreatSchema {

  my $self = shift;
  my $dsn = $self->{locator}->{dbi}->{dsn};

  $logger->debug( __PACKAGE__ . "->retreatSchema( dsn $dsn )" );

  my $ok;
  if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {

    return unless $self->_initSchema();
    
    #use Data::Dumper; print Dumper($self);
    $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");
    
    $ok = Tangram::Relational->retreat($self->{schema_tangram}, $dbh );

    # answer "$ok=2" means "maybe" for now - we have to patch this to a constant here because...
    # - ... Tangram::Relational->retreat doesn't seem to return a valid status
    # - possible improvement:
    #   - test this by checking for count of tables in database
    #   - problem with this: there may be some left not having been included to the schema
    #   - maybe better: use "->getChildNodes"?
    $ok = 2;

    $dbh->disconnect();

  }
  return $ok;
}

sub rebuildDbAndSchema {
  my $self = shift;
  $logger->info( __PACKAGE__ . "->rebuildDbAndSchema()" );
  my @results;

  # sum up results (bool (0/1)) in array
  push @results, $self->retreatSchema();
  push @results, $self->{dataStorageLayer}->dropDb();
  push @results, $self->{dataStorageLayer}->createDb();
  push @results, $self->deploySchema();

  # scan array for "bad ones"
  my $res = 1;
  map {
    $res = 0 if (!$_);
  } @results;
  
  return $res;
}

sub getListUnfiltered {
  my $self = shift;
  my $nodename = shift;
  my @results;
  $logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );
  # get set of objects from odbms by object name
  my $object_set = $self->{COREHANDLE}->remote($nodename);
  @results = $self->{COREHANDLE}->select($object_set);
  return \@results;
}

sub getListFiltered {
  my $self = shift;

  # redirect to unfiltered mode
  #return $self->getListUnfiltered(@_);

  my $nodename = shift;
  my $filters = shift;
  my @results;
  $logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );

  #print Dumper($filters);
  
  my @tfilters;
  
  foreach my $filter (@$filters) {
  
    # get filter - TODO: for each filter
    #my $filter = $filters->[0];
  
    # build filter
    my $lexpr = $filter->{key};
    #my $op = $filter->{op};
    my $op = '=';
    my $rexpr = $filter->{val};
    my $tight = 100;
    
  #  my $tfilter = Tangram::Filter->new(
  #    expr => "t1.$lexpr $op '$rexpr'",
  #    tight => $tight,
  #    objects => $objects,
  #  );
  
    # HACK: build eval-string (sorry) to get filtered list - please give advice here
    push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";

  }

  my $tfilter = join(' & ', @tfilters);

  # get set of objects from odbms by object name
  my $remote = $self->{COREHANDLE}->remote($nodename);
  
  # was:
  #@results = $self->{COREHANDLE}->select($object_set, $tfilter);

  # is:
  # HACK: build eval-string (sorry) to get filtered list - please give advice here
  my $evalstring = 'return $self->{COREHANDLE}->select($remote, ' . $tfilter . ');';
  
  # get filtered list/set
  @results = eval($evalstring);
  die $@ if $@;
  
  return \@results;
}

sub createCursor {
  my $self = shift;
  my $node = shift;
  my $cmdHandle = $self->{COREHANDLE}->cursor($node);
  my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );
  return $result;
}

sub createSet {
  my $self = shift;
  my @objects = @_;
  my $rh = Set::Object->new();
  foreach (@objects) {
    #print Dumper($_);
    $rh->insert($_) if !isEmpty($_);
  }
  #print Dumper($rh->members());
  my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
  return $result;
}

sub sendQuery {
  my $self = 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);

  #print Dumper($query);

  # HACK: special case: querying by id does not translate into a common tangram query
  # just load the object by given id(ent)
  if ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq') {
    #print "LOAD!!!", "\n";
    #exit;
    #return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );
    my $ident = $query->{criterias}->[0]->{val};
#print "load obj", "\n";
    #return $self->createSet() if $ident == 5;
    my $object = $self->{COREHANDLE}->load($ident);
#print "get id", "\n";
    my $oid = $self->{COREHANDLE}->id($object);
    return $self->createSet($object);
    #return $self->createSet( $self->{COREHANDLE}->load('300090018') );
  }

  die("This should not be reached for now - redirect to \$self->getListFiltered() here!");

  # TODO: do a common tangram query here

  my @crits;
  foreach (@{$query->{criterias}}) {
    my $op = '';
    $op = '=' if lc $_->{op} eq 'eq';
    push @crits, "$_->{key}$op'$_->{val}'";
  }
  my $subnodes = {};
  map { $subnodes->{$_}++ } @{$query->{subnodes}};
  # HACK: this is hardcoded ;(    expand possibilities!
  #my $crit = join(' AND ', @crits);
  #my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);
  #return $self->sendCommand($sql);
  #my $h = $self->{COREHANDLE}->remote($query->{node});
  #my $res = $self->{COREHANDLE}->select($h, $h->{);
  return $self->createCursor($query->{node});
}

sub eraseAll {
  my $self = shift;
  my $classname = shift;
  my $remote = $self->{COREHANDLE}->remote($classname);
  my @objs = $self->{COREHANDLE}->select($remote);
  $self->{COREHANDLE}->erase(@objs);
}

sub createDb {
  my $self = shift;
  my $storage = $self->_getSubLayerHandle();
  return $storage->createDb();
}

sub getObject {
  my $self = shift;
  my $oid = shift;
  # TODO: review this
  #if (!$self->{COREHANDLE}) { return; }
  return $self->{COREHANDLE}->load($oid);
}

sub getObjectAsHash {
  my $self = shift;
  my $oid = shift;
  my $options = shift;
  my $obj = $self->getObject($oid);
  my $deref = var_deref($obj);
  var2utf8($deref) if ($options->{utf8});
  return $deref;
}

1;
1	joko	1.6	############################################
2	cvsjoko	1.1	#
3	joko	1.10	# $Id: Tangram.pm,v 1.9 2002/12/03 05:29:40 joko Exp $
4	joko	1.2	#
5			# $Log: Tangram.pm,v $
6	joko	1.10	# Revision 1.9 2002/12/03 05:29:40 joko
7			# + sub getObject
8			# + sub getObjectAsHash
9			#
10	joko	1.9	# Revision 1.8 2002/12/01 22:25:51 joko
11			# + now utilizing metadata from storage locator when connecting to DBI in "raw"-mode
12			#
13	joko	1.8	# Revision 1.7 2002/12/01 04:46:19 joko
14			# + sub eraseAll
15			#
16	joko	1.7	# Revision 1.6 2002/11/29 05:02:30 joko
17			# - sub getNewPerlObjectByPkgName (moved to libp.pm)
18			# + sub getMetaInfo
19			# - sub existsChildNode (moved to Abstract.pm)
20			# + sub getListUnfiltered
21			# + sub getListFiltered
22			# + sub createCursor
23			# + sub createSet
24			# + sub sendQuery
25			#
26	joko	1.6	# Revision 1.5 2002/11/17 06:35:18 joko
27			# + locator metadata can now be reached via ->{locator}
28			# - getChildNodes is now wrapped via COREHANDLE
29			#
30	joko	1.5	# Revision 1.4 2002/10/25 11:44:44 joko
31			# + sub _initSchema
32			# + sub existsChildNode
33			# + sub testIntegrity
34			# + sub rebuildDbAndSchema
35			#
36	joko	1.4	# Revision 1.3 2002/10/17 03:56:55 joko
37			# + bugfix: trapped eval error
38			#
39	joko	1.3	# Revision 1.2 2002/10/17 00:10:05 joko
40			# + removed dependency from tsobj.pm, schema is now independent
41			# + sub getNewPerlObjectByPkgName
42			# + sub deploySchema
43			# + sub retreatSchema
44			#
45	joko	1.2	# Revision 1.1 2002/10/10 03:44:07 cvsjoko
46			# + new
47	cvsjoko	1.1	#
48	joko	1.6	############################################
49
50	cvsjoko	1.1
51			package Data::Storage::Handler::Tangram;
52
53			use strict;
54			use warnings;
55
56			use base ("Data::Storage::Handler::Abstract");
57
58			use Tangram;
59			use Data::Dumper;
60	joko	1.6	use libp qw( getNewPerlObjectByPkgName );
61			use Data::Storage::Result::Tangram;
62			use Data::Compare::Struct qw( isEmpty );
63	joko	1.9	use Data::Transform::Deep qw( var_deref );
64			use Data::Transform::Encode qw( var2utf8 );
65
66	cvsjoko	1.1
67			# get logger instance
68			my $logger = Log::Dispatch::Config->instance;
69
70
71	joko	1.6	sub getMetaInfo {
72			my $self = shift;
73			$logger->debug( __PACKAGE__ . "->getMetaInfo()" );
74			return {
75			'disconnectMethod' => 'disconnect',
76			};
77	joko	1.2	}
78
79	joko	1.4	sub _initSchema {
80			my $self = shift;
81			$logger->debug( __PACKAGE__ . "->_initSchema()" );
82			#if (!$self->{schema_tangram}) {
83	joko	1.5	my $obj = getNewPerlObjectByPkgName($self->{locator}->{schema}, { EXPORT_OBJECTS => $self->{locator}->{classnames}, want_transactions => $self->{locator}->{want_transactions} } );
84	joko	1.4	$self->{schema_tangram} = $obj->getSchema();
85			#}
86			if (!$self->{schema_tangram}) {
87			$logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );
88			return 0;
89			}
90			return 1;
91			}
92
93	cvsjoko	1.1	sub connect {
94
95			my $self = shift;
96
97			my $dsn = shift;
98	joko	1.5	$dsn \|\|= $self->{locator}->{dbi}->{dsn};
99	cvsjoko	1.1
100	joko	1.2	$logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
101	cvsjoko	1.1
102			#my $storage = Tangram::Relational->connect( $schema, $dsn );
103			#my $storage = Tangram::mysql->connect( $schema, $dsn );
104			#$storage = Tangram::Relational->connect( Project->schema, $dsn );
105
106			# if (!testDsn($dsn)) {
107			# croak("Database at \"$dsn\" is not available");
108			# return;
109			# }
110
111	joko	1.4	return unless $self->_initSchema();
112
113	joko	1.6	# create the main tangram storage object
114	joko	1.2	#$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
115			$self->{COREHANDLE} = Tangram::Relational->connect( $self->{schema_tangram}, $dsn );
116	cvsjoko	1.1
117	joko	1.6	# some attempts for configuring the wrapped underlying dbi.....
118	cvsjoko	1.1	#$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
119			#$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE();
120			#$self->_configureUnderlyingStorage;
121	joko	1.6
122			# ..... encapsulation wins!
123	cvsjoko	1.1	$self->configureCOREHANDLE();
124
125	joko	1.5	$self->{locator}->{status}->{connected} = 1;
126
127	joko	1.4	return 1;
128
129	cvsjoko	1.1	}
130
131			sub getChildNodes {
132
133			my $self = shift;
134			my @nodes;
135
136	joko	1.4	$logger->debug( __PACKAGE__ . "->getChildNodes()" );
137
138	cvsjoko	1.1	# create new DBI - Data::Storage - object from already connected DBI::db - handle inside the current COREHANDLE
139			#my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} });
140			#my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} );
141	joko	1.6
142			# todo: should we retrieve information from the schema here
143			# rather than poorly getting table names from underlying dbi?
144	cvsjoko	1.1	my $storage = $self->_getSubLayerHandle();
145	joko	1.5	@nodes = @{$storage->getChildNodes()};
146	cvsjoko	1.1	#$storage->_configureCOREHANDLE();
147	joko	1.5	#print "getchildnodes\n";
148			#print Dumper($self);
149	cvsjoko	1.1	#if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
150
151	joko	1.8	# TODO: REVIEW
152			#$storage->disconnect();
153	cvsjoko	1.1
154	joko	1.4	$self->{meta}->{childnodes} = \@nodes;
155
156	cvsjoko	1.1	return \@nodes;
157
158			}
159
160
161	joko	1.4	sub testIntegrity {
162
163			my $self = shift;
164
165			$logger->debug( __PACKAGE__ . "->testIntegrity()" );
166
167			# 1st test: are there tables?
168			if (!$self->getChildNodes()) {
169			$logger->warning( __PACKAGE__ . "->testIntegrity no childnodes exist" );
170			return;
171			}
172
173			# 2nd test: is there a table named "Tangram"?
174			if (!$self->existsChildNode("Tangram")) {
175			$logger->warning( __PACKAGE__ . "->testIntegrity childnode \"Tangram\" doesn't exist" );
176			return;
177			}
178
179	joko	1.5	$self->{locator}->{status}->{integrity} = 1;
180	joko	1.4	return 1;
181
182			}
183
184
185	cvsjoko	1.1	sub _getSubLayerHandle {
186
187			my $self = shift;
188
189	joko	1.4	$logger->debug( __PACKAGE__ . "->_getSubLayerHandle()" );
190
191	cvsjoko	1.1	#print Dumper($self);
192	joko	1.5
193	cvsjoko	1.1	# hack, make more generic!
194	joko	1.4	if (!$self->{dataStorageLayer}) {
195			$logger->debug( __PACKAGE__ . "->_getSubLayerHandle() creating new dataStorageLayer" );
196			#my $loc = Data::Storage::Locator->new( type => "DBI", dbi => $self->{dbi}, COREHANDLE => $self->{COREHANDLE}->{db} );
197	joko	1.5	my $loc = Data::Storage::Locator->new( { type => "DBI", dbi => $self->{locator}->{dbi} } );
198	joko	1.4	$self->{dataStorageLayer} = Data::Storage->new( $loc, { protected => 1 } );
199	cvsjoko	1.1	#$self->{STORAGE_UNDER_THE_HOOD}->{STORAGEHANDLE}->_configureCOREHANDLE();
200			#$self->{STORAGE_UNDER_THE_HOOD}->_configureCOREHANDLE();
201			}
202
203			#print Dumper($self->{STORAGE_UNDER_THE_HOOD});
204
205	joko	1.4	return $self->{dataStorageLayer};
206	cvsjoko	1.1
207			}
208
209			sub _configureUnderlyingStorage {
210
211			my $self = shift;
212	joko	1.4
213			$logger->debug( __PACKAGE__ . "->_configureUnderlyingStorage" );
214
215	cvsjoko	1.1	$self->_configureCOREHANDLE_DBI();
216			return;
217
218			foreach my $key (keys %{$self->{dbi}}) {
219			my $val = $self->{dbi}->{$key};
220			print "entry: $key; $val", "\n";
221			$self->{COREHANDLE}->{db}->{$key} = $val;
222			}
223			#print Dumper($self->{COREHANDLE}->{db});
224			}
225
226
227			sub configureCOREHANDLE {
228
229			my $self = shift;
230
231	joko	1.4	$logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );
232	cvsjoko	1.1
233			#my $subLayer = $self->_getSubLayerHandle();
234
235			# apply configured modifications
236			if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
237			$self->{COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});
238			}
239			if (exists $self->{dbi}->{RaiseError}) {
240			$self->{COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};
241			}
242			if (exists $self->{dbi}->{PrintError}) {
243			$self->{COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};
244			}
245			if (exists $self->{dbi}->{HandleError}) {
246			$self->{COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};
247			}
248
249	joko	1.2	}
250
251			sub deploySchema {
252			my $self = shift;
253	joko	1.5	my $args = shift;
254
255			my $dsn = $self->{locator}->{dbi}->{dsn};
256	joko	1.4
257			$logger->debug( __PACKAGE__ . "->deploySchema( dsn $dsn )" );
258
259	joko	1.2	my $ok;
260	joko	1.8	if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
261	joko	1.4	return unless $self->_initSchema();
262			$ok = Tangram::Relational->deploy($self->{schema_tangram}, $dbh );
263	joko	1.2	$dbh->disconnect();
264			}
265			return $ok;
266			}
267
268			sub retreatSchema {
269	joko	1.4
270	joko	1.2	my $self = shift;
271	joko	1.5	my $dsn = $self->{locator}->{dbi}->{dsn};
272	joko	1.4
273			$logger->debug( __PACKAGE__ . "->retreatSchema( dsn $dsn )" );
274
275	joko	1.2	my $ok;
276	joko	1.8	if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
277	joko	1.4
278			return unless $self->_initSchema();
279
280			#use Data::Dumper; print Dumper($self);
281			$self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");
282
283			$ok = Tangram::Relational->retreat($self->{schema_tangram}, $dbh );
284	joko	1.8
285			# answer "$ok=2" means "maybe" for now - we have to patch this to a constant here because...
286			# - ... Tangram::Relational->retreat doesn't seem to return a valid status
287			# - possible improvement:
288			# - test this by checking for count of tables in database
289			# - problem with this: there may be some left not having been included to the schema
290			# - maybe better: use "->getChildNodes"?
291			$ok = 2;
292
293	joko	1.2	$dbh->disconnect();
294	joko	1.8
295	joko	1.2	}
296			return $ok;
297	joko	1.4	}
298
299			sub rebuildDbAndSchema {
300			my $self = shift;
301			$logger->info( __PACKAGE__ . "->rebuildDbAndSchema()" );
302			my @results;
303
304			# sum up results (bool (0/1)) in array
305			push @results, $self->retreatSchema();
306			push @results, $self->{dataStorageLayer}->dropDb();
307			push @results, $self->{dataStorageLayer}->createDb();
308			push @results, $self->deploySchema();
309
310			# scan array for "bad ones"
311			my $res = 1;
312			map {
313			$res = 0 if (!$_);
314			} @results;
315
316			return $res;
317	joko	1.6	}
318
319			sub getListUnfiltered {
320			my $self = shift;
321			my $nodename = shift;
322			my @results;
323			$logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" );
324			# get set of objects from odbms by object name
325			my $object_set = $self->{COREHANDLE}->remote($nodename);
326			@results = $self->{COREHANDLE}->select($object_set);
327			return \@results;
328			}
329
330			sub getListFiltered {
331			my $self = shift;
332
333			# redirect to unfiltered mode
334			#return $self->getListUnfiltered(@_);
335
336			my $nodename = shift;
337			my $filters = shift;
338			my @results;
339			$logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" );
340
341			#print Dumper($filters);
342
343			my @tfilters;
344
345			foreach my $filter (@$filters) {
346
347			# get filter - TODO: for each filter
348			#my $filter = $filters->[0];
349
350			# build filter
351			my $lexpr = $filter->{key};
352			#my $op = $filter->{op};
353			my $op = '=';
354			my $rexpr = $filter->{val};
355			my $tight = 100;
356
357			# my $tfilter = Tangram::Filter->new(
358			# expr => "t1.$lexpr $op '$rexpr'",
359			# tight => $tight,
360			# objects => $objects,
361			# );
362
363			# HACK: build eval-string (sorry) to get filtered list - please give advice here
364			push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'";
365
366			}
367
368			my $tfilter = join(' & ', @tfilters);
369
370			# get set of objects from odbms by object name
371			my $remote = $self->{COREHANDLE}->remote($nodename);
372
373			# was:
374			#@results = $self->{COREHANDLE}->select($object_set, $tfilter);
375
376			# is:
377			# HACK: build eval-string (sorry) to get filtered list - please give advice here
378			my $evalstring = 'return $self->{COREHANDLE}->select($remote, ' . $tfilter . ');';
379
380			# get filtered list/set
381			@results = eval($evalstring);
382			die $@ if $@;
383
384			return \@results;
385			}
386
387			sub createCursor {
388			my $self = shift;
389			my $node = shift;
390			my $cmdHandle = $self->{COREHANDLE}->cursor($node);
391			my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle );
392			return $result;
393			}
394
395			sub createSet {
396			my $self = shift;
397			my @objects = @_;
398			my $rh = Set::Object->new();
399			foreach (@objects) {
400			#print Dumper($_);
401			$rh->insert($_) if !isEmpty($_);
402			}
403			#print Dumper($rh->members());
404			my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh );
405			return $result;
406			}
407
408			sub sendQuery {
409			my $self = shift;
410			my $query = shift;
411			#my $sql = "SELECT cs FROM $self->{metainfo}->{$descent}->{node} WHERE $self->{metainfo}->{$descent}->{IdentProvider}->{arg}='$self->{entry}->{source}->{ident}';";
412			#my $result = $self->{metainfo}->{$descent}->{storage}->sendCommand($sql);
413
414			#print Dumper($query);
415
416			# HACK: special case: querying by id does not translate into a common tangram query
417			# just load the object by given id(ent)
418			if ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq') {
419			#print "LOAD!!!", "\n";
420			#exit;
421			#return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) );
422			my $ident = $query->{criterias}->[0]->{val};
423			#print "load obj", "\n";
424			#return $self->createSet() if $ident == 5;
425			my $object = $self->{COREHANDLE}->load($ident);
426			#print "get id", "\n";
427			my $oid = $self->{COREHANDLE}->id($object);
428			return $self->createSet($object);
429			#return $self->createSet( $self->{COREHANDLE}->load('300090018') );
430			}
431
432			die("This should not be reached for now - redirect to \$self->getListFiltered() here!");
433
434			# TODO: do a common tangram query here
435
436			my @crits;
437			foreach (@{$query->{criterias}}) {
438			my $op = '';
439			$op = '=' if lc $_->{op} eq 'eq';
440			push @crits, "$_->{key}$op'$_->{val}'";
441			}
442			my $subnodes = {};
443			map { $subnodes->{$_}++ } @{$query->{subnodes}};
444			# HACK: this is hardcoded ;( expand possibilities!
445			#my $crit = join(' AND ', @crits);
446			#my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit);
447			#return $self->sendCommand($sql);
448			#my $h = $self->{COREHANDLE}->remote($query->{node});
449			#my $res = $self->{COREHANDLE}->select($h, $h->{);
450			return $self->createCursor($query->{node});
451	joko	1.7	}
452
453			sub eraseAll {
454			my $self = shift;
455			my $classname = shift;
456	joko	1.10	my $remote = $self->{COREHANDLE}->remote($classname);
457			my @objs = $self->{COREHANDLE}->select($remote);
458	joko	1.7	$self->{COREHANDLE}->erase(@objs);
459	joko	1.8	}
460
461			sub createDb {
462			my $self = shift;
463			my $storage = $self->_getSubLayerHandle();
464			return $storage->createDb();
465	joko	1.9	}
466
467			sub getObject {
468			my $self = shift;
469			my $oid = shift;
470			# TODO: review this
471			#if (!$self->{COREHANDLE}) { return; }
472			return $self->{COREHANDLE}->load($oid);
473			}
474
475			sub getObjectAsHash {
476			my $self = shift;
477			my $oid = shift;
478			my $options = shift;
479			my $obj = $self->getObject($oid);
480			my $deref = var_deref($obj);
481			var2utf8($deref) if ($options->{utf8});
482			return $deref;
483	cvsjoko	1.1	}
484
485			1;
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