Storage/Handler/Tangram.pm

############################################
#
#  $Id: Tangram.pm,v 1.13 2002/12/05 07:59:04 joko Exp $
#
#  $Log: Tangram.pm,v $
#  Revision 1.13  2002/12/05 07:59:04  joko
#  + now using Tie::SecureHash as a base for the COREHANDLE
#  + former public COREHANDLE becomes private _COREHANDLE now
#  + sub getCOREHANDLE
#
#  Revision 1.12  2002/12/04 11:34:49  joko
#  - $schema_tangram doesn't have to be in class?
#
#  Revision 1.11  2002/12/04 08:54:08  jonen
#  + untested bugfix: undef($object) after transform to hash at getObjectAsHash
#
#  Revision 1.10  2002/12/03 15:53:23  joko
#  + small bugfix regarding object hierarchy
#
#  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");
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;


# this holds the complete instantiated schema from tangram
my $schema_tangram;

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

sub _initSchema {
  my $self = shift;
  $logger->debug( __PACKAGE__ . "->_initSchema()" );
  #if (!$schema_tangram) {
    my $obj = getNewPerlObjectByPkgName($self->{locator}->{schema}, { EXPORT_OBJECTS => $self->{locator}->{classnames}, want_transactions => $self->{locator}->{want_transactions} } );
    $schema_tangram = $obj->getSchema();
  #}
  if (!$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( $schema_tangram, $dsn );

#print "connect", "\n";
#my $core = $self->{_COREHANDLE};
#print Dumper($core);
  
    # 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();
    $ok = Tangram::Relational->deploy($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");
    
    $ok = Tangram::Relational->retreat($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;
  my $options = shift;
  # TODO: create a deep_unload method
  # unload($oid) will only unload object, not deep object hashes
  $self->{_COREHANDLE}->unload() if($options->{destroy});
  # 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, $options);
  my $deref = var_deref($obj);
  var2utf8($deref) if ($options->{utf8});
  #$obj->clear_refs;
  #$self->{COREHANDLE}->unload($obj) if($options->{destroy});
  #$obj->DESTROY;
  #undef($obj) if($options->{destroy});
  return $deref;
}

sub getSchema {
  return $schema_tangram;
}

sub getCOREHANDLE {
  my $self = shift;
  return $self->{_COREHANDLE};
}

1;
1	joko	1.6	############################################
2	cvsjoko	1.1	#
3	jonen	1.14	# $Id: Tangram.pm,v 1.13 2002/12/05 07:59:04 joko Exp $
4	joko	1.2	#
5			# $Log: Tangram.pm,v $
6	jonen	1.14	# 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	joko	1.13	# Revision 1.12 2002/12/04 11:34:49 joko
12			# - $schema_tangram doesn't have to be in class?
13			#
14	joko	1.12	# Revision 1.11 2002/12/04 08:54:08 jonen
15			# + untested bugfix: undef($object) after transform to hash at getObjectAsHash
16			#
17	jonen	1.11	# Revision 1.10 2002/12/03 15:53:23 joko
18			# + small bugfix regarding object hierarchy
19			#
20	joko	1.10	# Revision 1.9 2002/12/03 05:29:40 joko
21			# + sub getObject
22			# + sub getObjectAsHash
23			#
24	joko	1.9	# 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	joko	1.8	# Revision 1.7 2002/12/01 04:46:19 joko
28			# + sub eraseAll
29			#
30	joko	1.7	# 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	joko	1.6	# 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	joko	1.5	# Revision 1.4 2002/10/25 11:44:44 joko
45			# + sub _initSchema
46			# + sub existsChildNode
47			# + sub testIntegrity
48			# + sub rebuildDbAndSchema
49			#
50	joko	1.4	# Revision 1.3 2002/10/17 03:56:55 joko
51			# + bugfix: trapped eval error
52			#
53	joko	1.3	# Revision 1.2 2002/10/17 00:10:05 joko
54			# + removed dependency from tsobj.pm, schema is now independent
55			# + sub getNewPerlObjectByPkgName
56			# + sub deploySchema
57			# + sub retreatSchema
58			#
59	joko	1.2	# Revision 1.1 2002/10/10 03:44:07 cvsjoko
60			# + new
61	cvsjoko	1.1	#
62	joko	1.6	############################################
63
64	cvsjoko	1.1
65			package Data::Storage::Handler::Tangram;
66
67			use strict;
68			use warnings;
69
70	joko	1.13	use base ("Data::Storage::Handler");
71	cvsjoko	1.1	use base ("Data::Storage::Handler::Abstract");
72
73			use Tangram;
74			use Data::Dumper;
75	joko	1.6	use libp qw( getNewPerlObjectByPkgName );
76			use Data::Storage::Result::Tangram;
77			use Data::Compare::Struct qw( isEmpty );
78	joko	1.9	use Data::Transform::Deep qw( var_deref );
79			use Data::Transform::Encode qw( var2utf8 );
80
81	cvsjoko	1.1
82			# get logger instance
83			my $logger = Log::Dispatch::Config->instance;
84
85
86	joko	1.12	# this holds the complete instantiated schema from tangram
87			my $schema_tangram;
88
89	joko	1.6	sub getMetaInfo {
90			my $self = shift;
91			$logger->debug( __PACKAGE__ . "->getMetaInfo()" );
92			return {
93			'disconnectMethod' => 'disconnect',
94			};
95	joko	1.2	}
96
97	joko	1.4	sub _initSchema {
98			my $self = shift;
99			$logger->debug( __PACKAGE__ . "->_initSchema()" );
100	joko	1.12	#if (!$schema_tangram) {
101	joko	1.5	my $obj = getNewPerlObjectByPkgName($self->{locator}->{schema}, { EXPORT_OBJECTS => $self->{locator}->{classnames}, want_transactions => $self->{locator}->{want_transactions} } );
102	joko	1.12	$schema_tangram = $obj->getSchema();
103	joko	1.4	#}
104	joko	1.12	if (!$schema_tangram) {
105	joko	1.4	$logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );
106			return 0;
107			}
108			return 1;
109			}
110
111	cvsjoko	1.1	sub connect {
112
113			my $self = shift;
114
115			my $dsn = shift;
116	joko	1.5	$dsn \|\|= $self->{locator}->{dbi}->{dsn};
117	cvsjoko	1.1
118	joko	1.2	$logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
119	cvsjoko	1.1
120			#my $storage = Tangram::Relational->connect( $schema, $dsn );
121			#my $storage = Tangram::mysql->connect( $schema, $dsn );
122			#$storage = Tangram::Relational->connect( Project->schema, $dsn );
123
124			# if (!testDsn($dsn)) {
125			# croak("Database at \"$dsn\" is not available");
126			# return;
127			# }
128
129	joko	1.4	return unless $self->_initSchema();
130
131	joko	1.6	# create the main tangram storage object
132	joko	1.2	#$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
133	joko	1.13	$self->{_COREHANDLE} = Tangram::Relational->connect( $schema_tangram, $dsn );
134
135			#print "connect", "\n";
136			#my $core = $self->{_COREHANDLE};
137			#print Dumper($core);
138	cvsjoko	1.1
139	joko	1.6	# some attempts for configuring the wrapped underlying dbi.....
140	cvsjoko	1.1	#$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
141			#$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE();
142			#$self->_configureUnderlyingStorage;
143	joko	1.6
144			# ..... encapsulation wins!
145	cvsjoko	1.1	$self->configureCOREHANDLE();
146
147	joko	1.5	$self->{locator}->{status}->{connected} = 1;
148
149	joko	1.4	return 1;
150
151	cvsjoko	1.1	}
152
153			sub getChildNodes {
154
155			my $self = shift;
156			my @nodes;
157
158	joko	1.4	$logger->debug( __PACKAGE__ . "->getChildNodes()" );
159
160	cvsjoko	1.1	# 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} });
162			#my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} );
163	joko	1.6
164			# todo: should we retrieve information from the schema here
165			# rather than poorly getting table names from underlying dbi?
166	cvsjoko	1.1	my $storage = $self->_getSubLayerHandle();
167	joko	1.5	@nodes = @{$storage->getChildNodes()};
168	cvsjoko	1.1	#$storage->_configureCOREHANDLE();
169	joko	1.5	#print "getchildnodes\n";
170			#print Dumper($self);
171	cvsjoko	1.1	#if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
172
173	joko	1.8	# TODO: REVIEW
174			#$storage->disconnect();
175	cvsjoko	1.1
176	joko	1.4	$self->{meta}->{childnodes} = \@nodes;
177
178	cvsjoko	1.1	return \@nodes;
179
180			}
181
182
183	joko	1.4	sub testIntegrity {
184
185			my $self = shift;
186
187			$logger->debug( __PACKAGE__ . "->testIntegrity()" );
188
189			# 1st test: are there tables?
190			if (!$self->getChildNodes()) {
191			$logger->warning( __PACKAGE__ . "->testIntegrity no childnodes exist" );
192			return;
193			}
194
195			# 2nd test: is there a table named "Tangram"?
196			if (!$self->existsChildNode("Tangram")) {
197			$logger->warning( __PACKAGE__ . "->testIntegrity childnode \"Tangram\" doesn't exist" );
198			return;
199			}
200
201	joko	1.5	$self->{locator}->{status}->{integrity} = 1;
202	joko	1.4	return 1;
203
204			}
205
206
207	cvsjoko	1.1	sub _getSubLayerHandle {
208
209			my $self = shift;
210
211	joko	1.4	$logger->debug( __PACKAGE__ . "->_getSubLayerHandle()" );
212
213	cvsjoko	1.1	#print Dumper($self);
214	joko	1.5
215	cvsjoko	1.1	# hack, make more generic!
216	joko	1.4	if (!$self->{dataStorageLayer}) {
217			$logger->debug( __PACKAGE__ . "->_getSubLayerHandle() creating new dataStorageLayer" );
218			#my $loc = Data::Storage::Locator->new( type => "DBI", dbi => $self->{dbi}, COREHANDLE => $self->{COREHANDLE}->{db} );
219	joko	1.5	my $loc = Data::Storage::Locator->new( { type => "DBI", dbi => $self->{locator}->{dbi} } );
220	joko	1.4	$self->{dataStorageLayer} = Data::Storage->new( $loc, { protected => 1 } );
221	cvsjoko	1.1	#$self->{STORAGE_UNDER_THE_HOOD}->{STORAGEHANDLE}->_configureCOREHANDLE();
222			#$self->{STORAGE_UNDER_THE_HOOD}->_configureCOREHANDLE();
223			}
224
225			#print Dumper($self->{STORAGE_UNDER_THE_HOOD});
226
227	joko	1.4	return $self->{dataStorageLayer};
228	cvsjoko	1.1
229			}
230
231			sub _configureUnderlyingStorage {
232
233			my $self = shift;
234	joko	1.4
235			$logger->debug( __PACKAGE__ . "->_configureUnderlyingStorage" );
236
237	cvsjoko	1.1	$self->_configureCOREHANDLE_DBI();
238			return;
239
240			foreach my $key (keys %{$self->{dbi}}) {
241			my $val = $self->{dbi}->{$key};
242			print "entry: $key; $val", "\n";
243	joko	1.13	$self->{_COREHANDLE}->{db}->{$key} = $val;
244	cvsjoko	1.1	}
245			#print Dumper($self->{COREHANDLE}->{db});
246			}
247
248
249			sub configureCOREHANDLE {
250
251			my $self = shift;
252
253	joko	1.4	$logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );
254	cvsjoko	1.1
255			#my $subLayer = $self->_getSubLayerHandle();
256
257			# apply configured modifications
258			if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
259	joko	1.13	$self->{_COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});
260	cvsjoko	1.1	}
261			if (exists $self->{dbi}->{RaiseError}) {
262	joko	1.13	$self->{_COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};
263	cvsjoko	1.1	}
264			if (exists $self->{dbi}->{PrintError}) {
265	joko	1.13	$self->{_COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};
266	cvsjoko	1.1	}
267			if (exists $self->{dbi}->{HandleError}) {
268	joko	1.13	$self->{_COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};
269	cvsjoko	1.1	}
270
271	joko	1.2	}
272
273			sub deploySchema {
274			my $self = shift;
275	joko	1.5	my $args = shift;
276
277			my $dsn = $self->{locator}->{dbi}->{dsn};
278	joko	1.4
279			$logger->debug( __PACKAGE__ . "->deploySchema( dsn $dsn )" );
280
281	joko	1.2	my $ok;
282	joko	1.8	if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
283	joko	1.4	return unless $self->_initSchema();
284	joko	1.12	$ok = Tangram::Relational->deploy($schema_tangram, $dbh );
285	joko	1.2	$dbh->disconnect();
286			}
287			return $ok;
288			}
289
290			sub retreatSchema {
291	joko	1.4
292	joko	1.2	my $self = shift;
293	joko	1.5	my $dsn = $self->{locator}->{dbi}->{dsn};
294	joko	1.4
295			$logger->debug( __PACKAGE__ . "->retreatSchema( dsn $dsn )" );
296
297	joko	1.2	my $ok;
298	joko	1.8	if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) {
299	joko	1.4
300			return unless $self->_initSchema();
301
302			#use Data::Dumper; print Dumper($self);
303			$self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");
304
305	joko	1.12	$ok = Tangram::Relational->retreat($schema_tangram, $dbh );
306	joko	1.8
307			# answer "$ok=2" means "maybe" for now - we have to patch this to a constant here because...
308			# - ... 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	joko	1.2	$dbh->disconnect();
316	joko	1.8
317	joko	1.2	}
318			return $ok;
319	joko	1.4	}
320
321			sub rebuildDbAndSchema {
322			my $self = shift;
323			$logger->info( __PACKAGE__ . "->rebuildDbAndSchema()" );
324			my @results;
325
326			# sum up results (bool (0/1)) in array
327			push @results, $self->retreatSchema();
328			push @results, $self->{dataStorageLayer}->dropDb();
329			push @results, $self->{dataStorageLayer}->createDb();
330			push @results, $self->deploySchema();
331
332			# scan array for "bad ones"
333			my $res = 1;
334			map {
335			$res = 0 if (!$_);
336			} @results;
337
338			return $res;
339	joko	1.6	}
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	joko	1.13	my $object_set = $self->{_COREHANDLE}->remote($nodename);
348			@results = $self->{_COREHANDLE}->select($object_set);
349	joko	1.6	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	joko	1.13	my $remote = $self->{_COREHANDLE}->remote($nodename);
394	joko	1.6
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	joko	1.13	my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');';
401	joko	1.6
402			# get filtered list/set
403			@results = eval($evalstring);
404			die $@ if $@;
405
406			return \@results;
407			}
408
409			sub createCursor {
410			my $self = shift;
411			my $node = shift;
412	joko	1.13	my $cmdHandle = $self->{_COREHANDLE}->cursor($node);
413	joko	1.6	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	joko	1.13	my $object = $self->{_COREHANDLE}->load($ident);
448	joko	1.6	#print "get id", "\n";
449	joko	1.13	my $oid = $self->{_COREHANDLE}->id($object);
450	joko	1.6	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	joko	1.7	}
474
475			sub eraseAll {
476			my $self = shift;
477			my $classname = shift;
478	joko	1.13	my $remote = $self->{_COREHANDLE}->remote($classname);
479			my @objs = $self->{_COREHANDLE}->select($remote);
480			$self->{_COREHANDLE}->erase(@objs);
481	joko	1.8	}
482
483			sub createDb {
484			my $self = shift;
485			my $storage = $self->_getSubLayerHandle();
486			return $storage->createDb();
487	joko	1.9	}
488
489			sub getObject {
490			my $self = shift;
491			my $oid = shift;
492	jonen	1.14	my $options = shift;
493			# TODO: create a deep_unload method
494			# unload($oid) will only unload object, not deep object hashes
495			$self->{_COREHANDLE}->unload() if($options->{destroy});
496	joko	1.9	# TODO: review this
497			#if (!$self->{COREHANDLE}) { return; }
498	joko	1.13	return $self->{_COREHANDLE}->load($oid);
499	joko	1.9	}
500
501			sub getObjectAsHash {
502			my $self = shift;
503			my $oid = shift;
504			my $options = shift;
505	jonen	1.14	my $obj = $self->getObject($oid, $options);
506	joko	1.9	my $deref = var_deref($obj);
507			var2utf8($deref) if ($options->{utf8});
508	jonen	1.14	#$obj->clear_refs;
509			#$self->{COREHANDLE}->unload($obj) if($options->{destroy});
510			#$obj->DESTROY;
511			#undef($obj) if($options->{destroy});
512	joko	1.9	return $deref;
513	joko	1.12	}
514
515			sub getSchema {
516			return $schema_tangram;
517	joko	1.13	}
518
519			sub getCOREHANDLE {
520			my $self = shift;
521			return $self->{_COREHANDLE};
522	cvsjoko	1.1	}
523
524			1;
MailToCvsAdmin">MailToCvsAdmin	ViewVC Help
Powered by ViewVC 1.1.26