Storage/Handler/Tangram.pm

#################################
#
#  $Id: Tangram.pm,v 1.4 2002/10/25 11:44:44 joko Exp $
#
#  $Log: Tangram.pm,v $
#  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;

# 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 $evstring: " .  $@ );
  return $pkgname->new($args);
}

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();

    #$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();

  $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} );
  my $storage = $self->_getSubLayerHandle();
  @nodes = @{$storage->getChildNodes()};
  #$storage->_configureCOREHANDLE();
#print "getchildnodes\n";
#print Dumper($self);
  #if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
  
  $storage->disconnect();
  
  $self->{meta}->{childnodes} = \@nodes;
  
  return \@nodes;

}


sub existsChildNode {
  my $self = shift;
  my $nodename = shift;
  $logger->debug( __PACKAGE__ . "->getChildNode( nodename $nodename )" );
  $self->getChildNodes() unless $self->{meta}->{childnodes};
  #print Dumper($self->{meta}->{childnodes});
  return grep $nodename, @{$self->{meta}->{childnodes}};
}


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};
  #my $dsn = $self->{dbi}->{dsn};

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

  my $ok;
  # TODO: is this DBI->connect okay here like it is? regarding errors.....???
  if ( my $dbh = DBI->connect($dsn, '', '', {
                                                      PrintError => 0,
                                                    } ) ) {

    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};
  #my $dsn = $self->{dbi}->{dsn};

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

  my $ok;
  if ( my $dbh = DBI->connect($dsn, '', '', {
                                                      #PrintError => 0,
                                                      #RaiseError => 0,
                                                    } ) ) {

    return unless $self->_initSchema();
    
    #use Data::Dumper; print Dumper($self);
    $self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");
    
    $ok = Tangram::Relational->retreat($self->{schema_tangram}, $dbh );
    $ok = 2;    # answer is "maybe" for now since Tangram::Relational->retreat doesn't seem to return a valid status
                    # idea: 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
    $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;
}

1;
1	cvsjoko	1.1	#################################
2			#
3	joko	1.5	# $Id: Tangram.pm,v 1.4 2002/10/25 11:44:44 joko Exp $
4	joko	1.2	#
5			# $Log: Tangram.pm,v $
6	joko	1.5	# Revision 1.4 2002/10/25 11:44:44 joko
7			# + sub _initSchema
8			# + sub existsChildNode
9			# + sub testIntegrity
10			# + sub rebuildDbAndSchema
11			#
12	joko	1.4	# Revision 1.3 2002/10/17 03:56:55 joko
13			# + bugfix: trapped eval error
14			#
15	joko	1.3	# Revision 1.2 2002/10/17 00:10:05 joko
16			# + removed dependency from tsobj.pm, schema is now independent
17			# + sub getNewPerlObjectByPkgName
18			# + sub deploySchema
19			# + sub retreatSchema
20			#
21	joko	1.2	# Revision 1.1 2002/10/10 03:44:07 cvsjoko
22			# + new
23	cvsjoko	1.1	#
24			#
25			#################################
26
27			package Data::Storage::Handler::Tangram;
28
29			use strict;
30			use warnings;
31
32			use base ("Data::Storage::Handler::Abstract");
33
34			use Tangram;
35			use Data::Dumper;
36
37			# get logger instance
38			my $logger = Log::Dispatch::Config->instance;
39
40
41			our $metainfo = {
42			'disconnectMethod' => 'disconnect',
43			};
44
45	joko	1.2	sub getNewPerlObjectByPkgName {
46			my $pkgname = shift;
47			my $args = shift;
48	joko	1.3	$logger->debug( __PACKAGE__ . "->getNewPerlObjectByPkgName( pkgname $pkgname args $args )" );
49	joko	1.2	my $evstring = "use $pkgname;";
50			eval($evstring);
51	joko	1.5	$@ && $logger->error( __PACKAGE__ . ':' . __LINE__ . " Error in eval $evstring: " . $@ );
52	joko	1.2	return $pkgname->new($args);
53			}
54
55	joko	1.4	sub _initSchema {
56			my $self = shift;
57			$logger->debug( __PACKAGE__ . "->_initSchema()" );
58			#if (!$self->{schema_tangram}) {
59	joko	1.5	my $obj = getNewPerlObjectByPkgName($self->{locator}->{schema}, { EXPORT_OBJECTS => $self->{locator}->{classnames}, want_transactions => $self->{locator}->{want_transactions} } );
60	joko	1.4	$self->{schema_tangram} = $obj->getSchema();
61			#}
62			if (!$self->{schema_tangram}) {
63			$logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" );
64			return 0;
65			}
66			return 1;
67			}
68
69	cvsjoko	1.1	sub connect {
70
71			my $self = shift;
72
73			my $dsn = shift;
74	joko	1.5	$dsn \|\|= $self->{locator}->{dbi}->{dsn};
75	cvsjoko	1.1
76	joko	1.2	$logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" );
77	cvsjoko	1.1
78			#my $storage = Tangram::Relational->connect( $schema, $dsn );
79			#my $storage = Tangram::mysql->connect( $schema, $dsn );
80			#$storage = Tangram::Relational->connect( Project->schema, $dsn );
81
82			# if (!testDsn($dsn)) {
83			# croak("Database at \"$dsn\" is not available");
84			# return;
85			# }
86
87	joko	1.4	return unless $self->_initSchema();
88
89	joko	1.2	#$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn );
90			$self->{COREHANDLE} = Tangram::Relational->connect( $self->{schema_tangram}, $dsn );
91	cvsjoko	1.1
92			#$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage();
93			#$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE();
94			#$self->_configureUnderlyingStorage;
95			$self->configureCOREHANDLE();
96
97	joko	1.5	$self->{locator}->{status}->{connected} = 1;
98
99	joko	1.4	return 1;
100
101	cvsjoko	1.1	}
102
103			sub getChildNodes {
104
105			my $self = shift;
106			my @nodes;
107
108	joko	1.4	$logger->debug( __PACKAGE__ . "->getChildNodes()" );
109
110	cvsjoko	1.1	# create new DBI - Data::Storage - object from already connected DBI::db - handle inside the current COREHANDLE
111			#my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} });
112			#my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} );
113			my $storage = $self->_getSubLayerHandle();
114	joko	1.5	@nodes = @{$storage->getChildNodes()};
115	cvsjoko	1.1	#$storage->_configureCOREHANDLE();
116	joko	1.5	#print "getchildnodes\n";
117			#print Dumper($self);
118	cvsjoko	1.1	#if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) {
119
120			$storage->disconnect();
121
122	joko	1.4	$self->{meta}->{childnodes} = \@nodes;
123
124	cvsjoko	1.1	return \@nodes;
125
126			}
127
128
129	joko	1.4	sub existsChildNode {
130			my $self = shift;
131			my $nodename = shift;
132			$logger->debug( __PACKAGE__ . "->getChildNode( nodename $nodename )" );
133			$self->getChildNodes() unless $self->{meta}->{childnodes};
134	joko	1.5	#print Dumper($self->{meta}->{childnodes});
135	joko	1.4	return grep $nodename, @{$self->{meta}->{childnodes}};
136			}
137
138
139			sub testIntegrity {
140
141			my $self = shift;
142
143			$logger->debug( __PACKAGE__ . "->testIntegrity()" );
144
145			# 1st test: are there tables?
146			if (!$self->getChildNodes()) {
147			$logger->warning( __PACKAGE__ . "->testIntegrity no childnodes exist" );
148			return;
149			}
150
151			# 2nd test: is there a table named "Tangram"?
152			if (!$self->existsChildNode("Tangram")) {
153			$logger->warning( __PACKAGE__ . "->testIntegrity childnode \"Tangram\" doesn't exist" );
154			return;
155			}
156
157	joko	1.5	$self->{locator}->{status}->{integrity} = 1;
158	joko	1.4	return 1;
159
160			}
161
162
163	cvsjoko	1.1	sub _getSubLayerHandle {
164
165			my $self = shift;
166
167	joko	1.4	$logger->debug( __PACKAGE__ . "->_getSubLayerHandle()" );
168
169	cvsjoko	1.1	#print Dumper($self);
170	joko	1.5
171	cvsjoko	1.1	# hack, make more generic!
172	joko	1.4	if (!$self->{dataStorageLayer}) {
173			$logger->debug( __PACKAGE__ . "->_getSubLayerHandle() creating new dataStorageLayer" );
174			#my $loc = Data::Storage::Locator->new( type => "DBI", dbi => $self->{dbi}, COREHANDLE => $self->{COREHANDLE}->{db} );
175	joko	1.5	my $loc = Data::Storage::Locator->new( { type => "DBI", dbi => $self->{locator}->{dbi} } );
176	joko	1.4	$self->{dataStorageLayer} = Data::Storage->new( $loc, { protected => 1 } );
177	cvsjoko	1.1	#$self->{STORAGE_UNDER_THE_HOOD}->{STORAGEHANDLE}->_configureCOREHANDLE();
178			#$self->{STORAGE_UNDER_THE_HOOD}->_configureCOREHANDLE();
179			}
180
181			#print Dumper($self->{STORAGE_UNDER_THE_HOOD});
182
183	joko	1.4	return $self->{dataStorageLayer};
184	cvsjoko	1.1
185			}
186
187			sub _configureUnderlyingStorage {
188
189			my $self = shift;
190	joko	1.4
191			$logger->debug( __PACKAGE__ . "->_configureUnderlyingStorage" );
192
193	cvsjoko	1.1	$self->_configureCOREHANDLE_DBI();
194			return;
195
196			foreach my $key (keys %{$self->{dbi}}) {
197			my $val = $self->{dbi}->{$key};
198			print "entry: $key; $val", "\n";
199			$self->{COREHANDLE}->{db}->{$key} = $val;
200			}
201			#print Dumper($self->{COREHANDLE}->{db});
202			}
203
204
205			sub configureCOREHANDLE {
206
207			my $self = shift;
208
209	joko	1.4	$logger->debug( __PACKAGE__ . "->configureCOREHANDLE" );
210	cvsjoko	1.1
211			#my $subLayer = $self->_getSubLayerHandle();
212
213			# apply configured modifications
214			if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) {
215			$self->{COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file});
216			}
217			if (exists $self->{dbi}->{RaiseError}) {
218			$self->{COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError};
219			}
220			if (exists $self->{dbi}->{PrintError}) {
221			$self->{COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError};
222			}
223			if (exists $self->{dbi}->{HandleError}) {
224			$self->{COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError};
225			}
226
227	joko	1.2	}
228
229			sub deploySchema {
230			my $self = shift;
231	joko	1.5	my $args = shift;
232
233			my $dsn = $self->{locator}->{dbi}->{dsn};
234			#my $dsn = $self->{dbi}->{dsn};
235	joko	1.4
236			$logger->debug( __PACKAGE__ . "->deploySchema( dsn $dsn )" );
237
238	joko	1.2	my $ok;
239	joko	1.5	# TODO: is this DBI->connect okay here like it is? regarding errors.....???
240	joko	1.2	if ( my $dbh = DBI->connect($dsn, '', '', {
241			PrintError => 0,
242			} ) ) {
243	joko	1.4
244			return unless $self->_initSchema();
245
246			$ok = Tangram::Relational->deploy($self->{schema_tangram}, $dbh );
247	joko	1.2	$dbh->disconnect();
248			}
249			return $ok;
250			}
251
252			sub retreatSchema {
253	joko	1.4
254	joko	1.2	my $self = shift;
255	joko	1.5	my $dsn = $self->{locator}->{dbi}->{dsn};
256			#my $dsn = $self->{dbi}->{dsn};
257	joko	1.4
258			$logger->debug( __PACKAGE__ . "->retreatSchema( dsn $dsn )" );
259
260	joko	1.2	my $ok;
261			if ( my $dbh = DBI->connect($dsn, '', '', {
262	joko	1.4	#PrintError => 0,
263			#RaiseError => 0,
264	joko	1.2	} ) ) {
265	joko	1.4
266			return unless $self->_initSchema();
267
268			#use Data::Dumper; print Dumper($self);
269			$self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11");
270
271			$ok = Tangram::Relational->retreat($self->{schema_tangram}, $dbh );
272			$ok = 2; # answer is "maybe" for now since Tangram::Relational->retreat doesn't seem to return a valid status
273			# idea: test this by checking for count of tables in database -
274			# problem with this: there may be some left not having been included to the schema
275	joko	1.2	$dbh->disconnect();
276			}
277			return $ok;
278	joko	1.4	}
279
280			sub rebuildDbAndSchema {
281			my $self = shift;
282			$logger->info( __PACKAGE__ . "->rebuildDbAndSchema()" );
283			my @results;
284
285			# sum up results (bool (0/1)) in array
286			push @results, $self->retreatSchema();
287			push @results, $self->{dataStorageLayer}->dropDb();
288			push @results, $self->{dataStorageLayer}->createDb();
289			push @results, $self->deploySchema();
290
291			# scan array for "bad ones"
292			my $res = 1;
293			map {
294			$res = 0 if (!$_);
295			} @results;
296
297			return $res;
298	cvsjoko	1.1	}
299
300			1;
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