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############################################ |
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# |
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# $Id: Tangram.pm,v 1.5 2002/11/17 06:35:18 joko Exp $ |
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# |
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# $Log: Tangram.pm,v $ |
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# Revision 1.5 2002/11/17 06:35:18 joko |
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# + locator metadata can now be reached via ->{locator} |
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# - getChildNodes is now wrapped via COREHANDLE |
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# |
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# Revision 1.4 2002/10/25 11:44:44 joko |
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# + sub _initSchema |
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# + sub existsChildNode |
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# + sub testIntegrity |
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# + sub rebuildDbAndSchema |
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# |
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# Revision 1.3 2002/10/17 03:56:55 joko |
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# + bugfix: trapped eval error |
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# |
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# Revision 1.2 2002/10/17 00:10:05 joko |
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# + removed dependency from tsobj.pm, schema is now independent |
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# + sub getNewPerlObjectByPkgName |
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# + sub deploySchema |
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# + sub retreatSchema |
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# |
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# Revision 1.1 2002/10/10 03:44:07 cvsjoko |
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# + new |
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# |
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############################################ |
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|
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|
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package Data::Storage::Handler::Tangram; |
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|
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use strict; |
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use warnings; |
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|
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use base ("Data::Storage::Handler::Abstract"); |
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|
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use Tangram; |
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use Data::Dumper; |
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use libp qw( getNewPerlObjectByPkgName ); |
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use Data::Storage::Result::Tangram; |
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use Data::Compare::Struct qw( isEmpty ); |
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|
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# get logger instance |
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my $logger = Log::Dispatch::Config->instance; |
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|
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|
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sub getMetaInfo { |
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my $self = shift; |
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$logger->debug( __PACKAGE__ . "->getMetaInfo()" ); |
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return { |
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'disconnectMethod' => 'disconnect', |
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}; |
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} |
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|
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sub _initSchema { |
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my $self = shift; |
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$logger->debug( __PACKAGE__ . "->_initSchema()" ); |
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#if (!$self->{schema_tangram}) { |
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my $obj = getNewPerlObjectByPkgName($self->{locator}->{schema}, { EXPORT_OBJECTS => $self->{locator}->{classnames}, want_transactions => $self->{locator}->{want_transactions} } ); |
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$self->{schema_tangram} = $obj->getSchema(); |
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#} |
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if (!$self->{schema_tangram}) { |
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$logger->error( __PACKAGE__ . "->_initSchema: No Schema available for $self->{schema}" ); |
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return 0; |
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} |
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return 1; |
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} |
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|
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sub connect { |
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|
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my $self = shift; |
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|
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my $dsn = shift; |
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$dsn ||= $self->{locator}->{dbi}->{dsn}; |
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|
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$logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" ); |
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|
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#my $storage = Tangram::Relational->connect( $schema, $dsn ); |
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#my $storage = Tangram::mysql->connect( $schema, $dsn ); |
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#$storage = Tangram::Relational->connect( Project->schema, $dsn ); |
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|
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# if (!testDsn($dsn)) { |
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# croak("Database at \"$dsn\" is not available"); |
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# return; |
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# } |
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|
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return unless $self->_initSchema(); |
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|
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# create the main tangram storage object |
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#$self->{COREHANDLE} = Tangram::Relational->connect( $schema, $dsn ); |
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$self->{COREHANDLE} = Tangram::Relational->connect( $self->{schema_tangram}, $dsn ); |
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|
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# some attempts for configuring the wrapped underlying dbi..... |
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#$self->{STORAGEHANDLE_UNDERLYING} = $self->getUnderlyingStorage(); |
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#$self->{STORAGEHANDLE_UNDERLYING}->_configureCOREHANDLE(); |
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#$self->_configureUnderlyingStorage; |
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|
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# ..... encapsulation wins! |
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$self->configureCOREHANDLE(); |
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|
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$self->{locator}->{status}->{connected} = 1; |
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|
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return 1; |
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|
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} |
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|
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sub getChildNodes { |
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|
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my $self = shift; |
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my @nodes; |
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|
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$logger->debug( __PACKAGE__ . "->getChildNodes()" ); |
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|
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# create new DBI - Data::Storage - object from already connected DBI::db - handle inside the current COREHANDLE |
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#my $loc = new Data::Storage::Locator( type => "DBI", dbi => { db => $self->{COREHANDLE}->{db} }); |
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#my $loc = new Data::Storage::Locator( type => "DBI", COREHANDLE => $self->{COREHANDLE}->{db} ); |
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|
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# todo: should we retrieve information from the schema here |
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# rather than poorly getting table names from underlying dbi? |
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my $storage = $self->_getSubLayerHandle(); |
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@nodes = @{$storage->getChildNodes()}; |
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#$storage->_configureCOREHANDLE(); |
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#print "getchildnodes\n"; |
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#print Dumper($self); |
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#if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) { |
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|
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$storage->disconnect(); |
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|
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$self->{meta}->{childnodes} = \@nodes; |
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|
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return \@nodes; |
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|
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} |
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|
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|
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sub testIntegrity { |
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|
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my $self = shift; |
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|
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$logger->debug( __PACKAGE__ . "->testIntegrity()" ); |
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|
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# 1st test: are there tables? |
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if (!$self->getChildNodes()) { |
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$logger->warning( __PACKAGE__ . "->testIntegrity no childnodes exist" ); |
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return; |
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} |
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|
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# 2nd test: is there a table named "Tangram"? |
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if (!$self->existsChildNode("Tangram")) { |
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$logger->warning( __PACKAGE__ . "->testIntegrity childnode \"Tangram\" doesn't exist" ); |
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return; |
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} |
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|
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$self->{locator}->{status}->{integrity} = 1; |
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return 1; |
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|
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} |
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|
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|
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sub _getSubLayerHandle { |
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|
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my $self = shift; |
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|
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$logger->debug( __PACKAGE__ . "->_getSubLayerHandle()" ); |
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|
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#print Dumper($self); |
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|
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# hack, make more generic! |
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if (!$self->{dataStorageLayer}) { |
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$logger->debug( __PACKAGE__ . "->_getSubLayerHandle() creating new dataStorageLayer" ); |
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#my $loc = Data::Storage::Locator->new( type => "DBI", dbi => $self->{dbi}, COREHANDLE => $self->{COREHANDLE}->{db} ); |
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my $loc = Data::Storage::Locator->new( { type => "DBI", dbi => $self->{locator}->{dbi} } ); |
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$self->{dataStorageLayer} = Data::Storage->new( $loc, { protected => 1 } ); |
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#$self->{STORAGE_UNDER_THE_HOOD}->{STORAGEHANDLE}->_configureCOREHANDLE(); |
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#$self->{STORAGE_UNDER_THE_HOOD}->_configureCOREHANDLE(); |
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} |
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|
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#print Dumper($self->{STORAGE_UNDER_THE_HOOD}); |
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|
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return $self->{dataStorageLayer}; |
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|
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} |
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|
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sub _configureUnderlyingStorage { |
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|
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my $self = shift; |
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|
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$logger->debug( __PACKAGE__ . "->_configureUnderlyingStorage" ); |
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|
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$self->_configureCOREHANDLE_DBI(); |
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return; |
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|
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foreach my $key (keys %{$self->{dbi}}) { |
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my $val = $self->{dbi}->{$key}; |
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print "entry: $key; $val", "\n"; |
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$self->{COREHANDLE}->{db}->{$key} = $val; |
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} |
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#print Dumper($self->{COREHANDLE}->{db}); |
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} |
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|
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|
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sub configureCOREHANDLE { |
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|
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my $self = shift; |
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|
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$logger->debug( __PACKAGE__ . "->configureCOREHANDLE" ); |
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|
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#my $subLayer = $self->_getSubLayerHandle(); |
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|
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# apply configured modifications |
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if (exists $self->{dbi}->{trace_level} && exists $self->{dbi}->{trace_file}) { |
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$self->{COREHANDLE}->{db}->trace($self->{dbi}->{trace_level}, $self->{dbi}->{trace_file}); |
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} |
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if (exists $self->{dbi}->{RaiseError}) { |
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$self->{COREHANDLE}->{db}->{RaiseError} = $self->{dbi}->{RaiseError}; |
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} |
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if (exists $self->{dbi}->{PrintError}) { |
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$self->{COREHANDLE}->{db}->{PrintError} = $self->{dbi}->{PrintError}; |
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} |
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if (exists $self->{dbi}->{HandleError}) { |
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$self->{COREHANDLE}->{db}->{HandleError} = $self->{dbi}->{HandleError}; |
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} |
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|
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} |
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|
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sub deploySchema { |
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my $self = shift; |
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my $args = shift; |
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|
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my $dsn = $self->{locator}->{dbi}->{dsn}; |
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#my $dsn = $self->{dbi}->{dsn}; |
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|
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$logger->debug( __PACKAGE__ . "->deploySchema( dsn $dsn )" ); |
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|
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my $ok; |
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# TODO: is this DBI->connect okay here like it is? regarding errors.....??? |
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if ( my $dbh = DBI->connect($dsn, '', '', { |
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PrintError => 0, |
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} ) ) { |
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|
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return unless $self->_initSchema(); |
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|
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$ok = Tangram::Relational->deploy($self->{schema_tangram}, $dbh ); |
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$dbh->disconnect(); |
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} |
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return $ok; |
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} |
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|
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sub retreatSchema { |
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|
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my $self = shift; |
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my $dsn = $self->{locator}->{dbi}->{dsn}; |
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#my $dsn = $self->{dbi}->{dsn}; |
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|
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$logger->debug( __PACKAGE__ . "->retreatSchema( dsn $dsn )" ); |
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|
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my $ok; |
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if ( my $dbh = DBI->connect($dsn, '', '', { |
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#PrintError => 0, |
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#RaiseError => 0, |
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} ) ) { |
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|
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return unless $self->_initSchema(); |
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|
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#use Data::Dumper; print Dumper($self); |
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$self->{dataStorageLayer}->removeLogDispatchHandler("Tangram11"); |
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|
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$ok = Tangram::Relational->retreat($self->{schema_tangram}, $dbh ); |
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$ok = 2; # answer is "maybe" for now since Tangram::Relational->retreat doesn't seem to return a valid status |
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# idea: test this by checking for count of tables in database - |
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# problem with this: there may be some left not having been included to the schema |
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$dbh->disconnect(); |
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} |
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return $ok; |
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} |
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|
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sub rebuildDbAndSchema { |
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my $self = shift; |
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$logger->info( __PACKAGE__ . "->rebuildDbAndSchema()" ); |
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my @results; |
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|
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# sum up results (bool (0/1)) in array |
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push @results, $self->retreatSchema(); |
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push @results, $self->{dataStorageLayer}->dropDb(); |
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push @results, $self->{dataStorageLayer}->createDb(); |
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push @results, $self->deploySchema(); |
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|
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# scan array for "bad ones" |
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my $res = 1; |
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map { |
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$res = 0 if (!$_); |
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} @results; |
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|
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return $res; |
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} |
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|
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sub getListUnfiltered { |
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my $self = shift; |
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my $nodename = shift; |
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my @results; |
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$logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" ); |
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# get set of objects from odbms by object name |
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my $object_set = $self->{COREHANDLE}->remote($nodename); |
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@results = $self->{COREHANDLE}->select($object_set); |
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return \@results; |
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} |
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|
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sub getListFiltered { |
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my $self = shift; |
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|
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# redirect to unfiltered mode |
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#return $self->getListUnfiltered(@_); |
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|
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my $nodename = shift; |
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my $filters = shift; |
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my @results; |
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$logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" ); |
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|
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#print Dumper($filters); |
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|
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my @tfilters; |
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|
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foreach my $filter (@$filters) { |
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|
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# get filter - TODO: for each filter |
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#my $filter = $filters->[0]; |
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|
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# build filter |
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my $lexpr = $filter->{key}; |
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#my $op = $filter->{op}; |
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my $op = '='; |
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my $rexpr = $filter->{val}; |
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my $tight = 100; |
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|
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# my $tfilter = Tangram::Filter->new( |
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# expr => "t1.$lexpr $op '$rexpr'", |
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# tight => $tight, |
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# objects => $objects, |
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# ); |
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|
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# HACK: build eval-string (sorry) to get filtered list - please give advice here |
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push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'"; |
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|
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} |
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|
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my $tfilter = join(' & ', @tfilters); |
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|
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# get set of objects from odbms by object name |
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my $remote = $self->{COREHANDLE}->remote($nodename); |
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|
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# was: |
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#@results = $self->{COREHANDLE}->select($object_set, $tfilter); |
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|
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# is: |
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# HACK: build eval-string (sorry) to get filtered list - please give advice here |
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my $evalstring = 'return $self->{COREHANDLE}->select($remote, ' . $tfilter . ');'; |
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|
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# get filtered list/set |
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@results = eval($evalstring); |
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die $@ if $@; |
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|
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return \@results; |
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} |
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|
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sub createCursor { |
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my $self = shift; |
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my $node = shift; |
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my $cmdHandle = $self->{COREHANDLE}->cursor($node); |
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my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle ); |
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return $result; |
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} |
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|
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sub createSet { |
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my $self = shift; |
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my @objects = @_; |
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my $rh = Set::Object->new(); |
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foreach (@objects) { |
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#print Dumper($_); |
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$rh->insert($_) if !isEmpty($_); |
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} |
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#print Dumper($rh->members()); |
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my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh ); |
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return $result; |
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} |
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|
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sub sendQuery { |
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my $self = shift; |
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my $query = shift; |
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#my $sql = "SELECT cs FROM $self->{metainfo}->{$descent}->{node} WHERE $self->{metainfo}->{$descent}->{IdentProvider}->{arg}='$self->{entry}->{source}->{ident}';"; |
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#my $result = $self->{metainfo}->{$descent}->{storage}->sendCommand($sql); |
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|
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#print Dumper($query); |
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|
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# HACK: special case: querying by id does not translate into a common tangram query |
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# just load the object by given id(ent) |
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if ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq') { |
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#print "LOAD!!!", "\n"; |
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#exit; |
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#return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) ); |
| 401 |
my $ident = $query->{criterias}->[0]->{val}; |
| 402 |
#print "load obj", "\n"; |
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#return $self->createSet() if $ident == 5; |
| 404 |
my $object = $self->{COREHANDLE}->load($ident); |
| 405 |
#print "get id", "\n"; |
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my $oid = $self->{COREHANDLE}->id($object); |
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return $self->createSet($object); |
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#return $self->createSet( $self->{COREHANDLE}->load('300090018') ); |
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} |
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|
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die("This should not be reached for now - redirect to \$self->getListFiltered() here!"); |
| 412 |
|
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# TODO: do a common tangram query here |
| 414 |
|
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my @crits; |
| 416 |
foreach (@{$query->{criterias}}) { |
| 417 |
my $op = ''; |
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$op = '=' if lc $_->{op} eq 'eq'; |
| 419 |
push @crits, "$_->{key}$op'$_->{val}'"; |
| 420 |
} |
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my $subnodes = {}; |
| 422 |
map { $subnodes->{$_}++ } @{$query->{subnodes}}; |
| 423 |
# HACK: this is hardcoded ;( expand possibilities! |
| 424 |
#my $crit = join(' AND ', @crits); |
| 425 |
#my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit); |
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#return $self->sendCommand($sql); |
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#my $h = $self->{COREHANDLE}->remote($query->{node}); |
| 428 |
#my $res = $self->{COREHANDLE}->select($h, $h->{); |
| 429 |
return $self->createCursor($query->{node}); |
| 430 |
} |
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|
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1; |
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