Storage/Handler/Tangram.pm

#################################
#
#  $Id: Tangram.pm,v 1.2 2002/10/17 00:10:05 joko Exp $
#
#  $Log: Tangram.pm,v $
#  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;

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


our $metainfo = {
  'disconnectMethod' => 'disconnect',
};

sub getNewPerlObjectByPkgName {
  my $pkgname = shift;
  my $args = shift;
  $logger->debug( __PACKAGE__ . "->getNewPerlObjectByPkgName( pkgname $pkgname args $args )" );
  my $evstring = "use $pkgname;";
  eval($evstring);
  $@ && $logger->error( __PACKAGE__ . ':' . __LINE__ . " Error in eval: " .  $@ );
  return $pkgname->new($args);
}

sub connect {

    my $self = shift;
    
    my $dsn = shift;
    $dsn ||= $self->{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;
#    }

    my $obj = getNewPerlObjectByPkgName($self->{schema}, { EXPORT_OBJECTS => $self->{classnames} } );
    $self->{schema_tangram} = $obj->getSchema();
    
    #$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
    $self->{COREHANDLE} = Tangram::Relational->connect( $self->{schema_tangram}, $dsn );
  
    #$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
    #$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE();
    #$self->_configureUnderlyingStorage;
    $self->configureCOREHANDLE();

}

sub getChildNodes {

  my $self = shift;
  my @nodes;

  # 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} );
  my $storage = $self->_getSubLayerHandle();
  #$storage->_configureCOREHANDLE();

  #if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
  if (my $result = $storage->sendCommand( 'SHOW TABLES;' ) ) {
    while ( my $row = $result->_getNextEntry() ) {
      push @nodes, $row;
    }
  }
  
  $storage->disconnect();
  
  return \@nodes;

}


sub _getSubLayerHandle {
  
  my $self = shift;
  
  use Data::Dumper;
  #print Dumper($self);
  
  # hack, make more generic!
  if (!$self->{STORAGE_SUBLAYER}) {
    my $loc = Data::Storage::Locator->new( type => "DBI", dbi => $self->{dbi}, COREHANDLE => $self->{COREHANDLE}->{db} );
    $self->{STORAGE_SUBLAYER} = 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->{STORAGE_SUBLAYER};
  
}

sub _configureUnderlyingStorage {
  
  my $self = shift;
  $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 $dsn = $self->{locator}->{dbi}->{dsn};
  my $dsn = $self->{dbi}->{dsn};
  my $ok;
  if ( my $dbh = DBI->connect($dsn, '', '', {
                                                      PrintError => 0,
                                                    } ) ) {
    $ok = Tangram::Relational->deploy($self->{schema}, $dbh );
    $dbh->disconnect();
  }
  return $ok;
}

sub retreatSchema {
  print "retreat\n";
  my $self = shift;
  #my $dsn = $self->{locator}->{dbi}->{dsn};
  my $dsn = $self->{dbi}->{dsn};
  my $ok;
  if ( my $dbh = DBI->connect($dsn, '', '', {
                                                      PrintError => 0,
                                                    } ) ) {
    $ok = Tangram::Relational->retreat($self->{schema}, $dbh );
    $dbh->disconnect();
  }
  return $ok;
}

1;
1	cvsjoko	1.1	#################################
2			#
3	joko	1.3	# $Id: Tangram.pm,v 1.2 2002/10/17 00:10:05 joko Exp $
4	joko	1.2	#
5			# $Log: Tangram.pm,v $
6	joko	1.3	# Revision 1.2 2002/10/17 00:10:05 joko
7			# + removed dependency from tsobj.pm, schema is now independent
8			# + sub getNewPerlObjectByPkgName
9			# + sub deploySchema
10			# + sub retreatSchema
11			#
12	joko	1.2	# Revision 1.1 2002/10/10 03:44:07 cvsjoko
13			# + new
14	cvsjoko	1.1	#
15			#
16			#################################
17
18			package Data::Storage::Handler::Tangram;
19
20			use strict;
21			use warnings;
22
23			use base ("Data::Storage::Handler::Abstract");
24
25			use Tangram;
26			use Data::Dumper;
27
28			# get logger instance
29			my $logger = Log::Dispatch::Config->instance;
30
31
32			our $metainfo = {
33			'disconnectMethod' => 'disconnect',
34			};
35
36	joko	1.2	sub getNewPerlObjectByPkgName {
37			my $pkgname = shift;
38			my $args = shift;
39	joko	1.3	$logger->debug( __PACKAGE__ . "->getNewPerlObjectByPkgName( pkgname $pkgname args $args )" );
40	joko	1.2	my $evstring = "use $pkgname;";
41			eval($evstring);
42	joko	1.3	$@ && $logger->error( __PACKAGE__ . ':' . __LINE__ . " Error in eval: " . $@ );
43	joko	1.2	return $pkgname->new($args);
44			}
45
46	cvsjoko	1.1	sub connect {
47
48			my $self = shift;
49
50			my $dsn = shift;
51			$dsn \|\|= $self->{dbi}->{dsn};
52
53	joko	1.2	$logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
54	cvsjoko	1.1
55			#my $storage = Tangram::Relational->connect( $schema, $dsn );
56			#my $storage = Tangram::mysql->connect( $schema, $dsn );
57			#$storage = Tangram::Relational->connect( Project->schema, $dsn );
58
59			# if (!testDsn($dsn)) {
60			# croak("Database at \"$dsn\" is not available");
61			# return;
62			# }
63
64	joko	1.2	my $obj = getNewPerlObjectByPkgName($self->{schema}, { EXPORT_OBJECTS => $self->{classnames} } );
65			$self->{schema_tangram} = $obj->getSchema();
66
67			#$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
68			$self->{COREHANDLE} = Tangram::Relational->connect( $self->{schema_tangram}, $dsn );
69	cvsjoko	1.1
70			#$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
71			#$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE();
72			#$self->_configureUnderlyingStorage;
73			$self->configureCOREHANDLE();
74
75			}
76
77			sub getChildNodes {
78
79			my $self = shift;
80			my @nodes;
81
82			# create new DBI - Data::Storage - object from already connected DBI::db - handle inside the current COREHANDLE
83			#my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} });
84			#my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} );
85			my $storage = $self->_getSubLayerHandle();
86			#$storage->_configureCOREHANDLE();
87
88			#if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
89			if (my $result = $storage->sendCommand( 'SHOW TABLES;' ) ) {
90			while ( my $row = $result->_getNextEntry() ) {
91			push @nodes, $row;
92			}
93			}
94
95			$storage->disconnect();
96
97			return \@nodes;
98
99			}
100
101
102			sub _getSubLayerHandle {
103
104			my $self = shift;
105
106			use Data::Dumper;
107			#print Dumper($self);
108
109			# hack, make more generic!
110			if (!$self->{STORAGE_SUBLAYER}) {
111	joko	1.2	my $loc = Data::Storage::Locator->new( type => "DBI", dbi => $self->{dbi}, COREHANDLE => $self->{COREHANDLE}->{db} );
112			$self->{STORAGE_SUBLAYER} = Data::Storage->new( $loc, { protected => 1 } );
113	cvsjoko	1.1	#$self->{STORAGE_UNDER_THE_HOOD}->{STORAGEHANDLE}->_configureCOREHANDLE();
114			#$self->{STORAGE_UNDER_THE_HOOD}->_configureCOREHANDLE();
115			}
116
117			#print Dumper($self->{STORAGE_UNDER_THE_HOOD});
118
119			return $self->{STORAGE_SUBLAYER};
120
121			}
122
123			sub _configureUnderlyingStorage {
124
125			my $self = shift;
126			$self->_configureCOREHANDLE_DBI();
127			return;
128
129			foreach my $key (keys %{$self->{dbi}}) {
130			my $val = $self->{dbi}->{$key};
131			print "entry: $key; $val", "\n";
132			$self->{COREHANDLE}->{db}->{$key} = $val;
133			}
134			#print Dumper($self->{COREHANDLE}->{db});
135			}
136
137
138			sub configureCOREHANDLE {
139
140			my $self = shift;
141
142			$logger->debug( __PACKAGE__ . "->_configureCOREHANDLE" );
143
144			#my $subLayer = $self->_getSubLayerHandle();
145
146			# apply configured modifications
147			if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
148			$self->{COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});
149			}
150			if (exists $self->{dbi}->{RaiseError}) {
151			$self->{COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};
152			}
153			if (exists $self->{dbi}->{PrintError}) {
154			$self->{COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};
155			}
156			if (exists $self->{dbi}->{HandleError}) {
157			$self->{COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};
158			}
159
160	joko	1.2	}
161
162			sub deploySchema {
163			my $self = shift;
164			#my $dsn = $self->{locator}->{dbi}->{dsn};
165			my $dsn = $self->{dbi}->{dsn};
166			my $ok;
167			if ( my $dbh = DBI->connect($dsn, '', '', {
168			PrintError => 0,
169			} ) ) {
170			$ok = Tangram::Relational->deploy($self->{schema}, $dbh );
171			$dbh->disconnect();
172			}
173			return $ok;
174			}
175
176			sub retreatSchema {
177			print "retreat\n";
178			my $self = shift;
179			#my $dsn = $self->{locator}->{dbi}->{dsn};
180			my $dsn = $self->{dbi}->{dsn};
181			my $ok;
182			if ( my $dbh = DBI->connect($dsn, '', '', {
183			PrintError => 0,
184			} ) ) {
185			$ok = Tangram::Relational->retreat($self->{schema}, $dbh );
186			$dbh->disconnect();
187			}
188			return $ok;
189	cvsjoko	1.1	}
190
191			1;
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