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############################################ |
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# |
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# $Id: Tangram.pm,v 1.16 2002/12/11 06:54:10 joko Exp $ |
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# |
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# $Log: Tangram.pm,v $ |
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# Revision 1.16 2002/12/11 06:54:10 joko |
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# + fix: encapsulated object-loading inside an 'eval' |
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# |
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# Revision 1.15 2002/12/05 13:55:21 joko |
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# + now utilizing 'object2hash' instead of 'var_deref' |
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# + played around with having fresh-objects - no progress.... |
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# |
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# Revision 1.14 2002/12/05 09:40:30 jonen |
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# + added option->{destroy} at getObject for unloading all instance |
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# |
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# Revision 1.13 2002/12/05 07:59:04 joko |
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# + now using Tie::SecureHash as a base for the COREHANDLE |
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# + former public COREHANDLE becomes private _COREHANDLE now |
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# + sub getCOREHANDLE |
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# |
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# Revision 1.12 2002/12/04 11:34:49 joko |
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# - $schema_tangram doesn't have to be in class? |
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# |
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# Revision 1.11 2002/12/04 08:54:08 jonen |
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# + untested bugfix: undef($object) after transform to hash at getObjectAsHash |
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# |
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# Revision 1.10 2002/12/03 15:53:23 joko |
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# + small bugfix regarding object hierarchy |
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# |
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# Revision 1.9 2002/12/03 05:29:40 joko |
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# + sub getObject |
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# + sub getObjectAsHash |
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# |
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# Revision 1.8 2002/12/01 22:25:51 joko |
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# + now utilizing metadata from storage locator when connecting to DBI in "raw"-mode |
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# |
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# Revision 1.7 2002/12/01 04:46:19 joko |
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# + sub eraseAll |
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# |
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# Revision 1.6 2002/11/29 05:02:30 joko |
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# - sub getNewPerlObjectByPkgName (moved to libp.pm) |
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# + sub getMetaInfo |
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# - sub existsChildNode (moved to Abstract.pm) |
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# + sub getListUnfiltered |
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# + sub getListFiltered |
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# + sub createCursor |
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# + sub createSet |
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# + sub sendQuery |
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# |
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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"); |
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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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use Data::Transform::Deep qw( object2hash ); |
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use Data::Transform::Encode qw( var2utf8 ); |
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|
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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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# this holds the complete instantiated schema from tangram |
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my $schema_tangram; |
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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 (!$schema_tangram) { |
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my $obj = getNewPerlObjectByPkgName($self->{locator}->{schema}, { EXPORT_OBJECTS => $self->{locator}->{classnames}, want_transactions => $self->{locator}->{want_transactions} } ); |
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$schema_tangram = $obj->getSchema(); |
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#} |
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if (!$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( $schema_tangram, $dsn ); |
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|
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#print "connect", "\n"; |
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#my $core = $self->{_COREHANDLE}; |
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#print Dumper($core); |
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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 = $self->sendCommand( 'SHOW TABLES;' ) ) { |
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|
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# TODO: REVIEW |
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#$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 = $self->{locator}->{dbi}->{dsn}; |
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|
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$logger->debug( __PACKAGE__ . "->deploySchema( dsn $dsn )" ); |
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|
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my $ok; |
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if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) { |
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return unless $self->_initSchema(); |
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$ok = Tangram::Relational->deploy($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 = $self->{locator}->{dbi}->{dsn}; |
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|
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$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, '', '', $self->{locator}->{dbi} ) ) { |
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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($schema_tangram, $dbh ); |
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|
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# answer "$ok=2" means "maybe" for now - we have to patch this to a constant here because... |
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# - ... Tangram::Relational->retreat doesn't seem to return a valid status |
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# - possible improvement: |
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# - 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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# - maybe better: use "->getChildNodes"? |
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$ok = 2; |
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|
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$dbh->disconnect(); |
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|
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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; |
| 371 |
$logger->debug( __PACKAGE__ . "->getListFiltered( nodename => '" . $nodename . "' )" ); |
| 372 |
|
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#print Dumper($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 |
| 380 |
#my $filter = $filters->[0]; |
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|
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# build filter |
| 383 |
my $lexpr = $filter->{key}; |
| 384 |
#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'", |
| 391 |
# tight => $tight, |
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# objects => $objects, |
| 393 |
# ); |
| 394 |
|
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# HACK: build eval-string (sorry) to get filtered list - please give advice here |
| 396 |
push @tfilters, '$remote->{' . $filter->{key} . '}' . " $filter->{op} '$filter->{val}'"; |
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|
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} |
| 399 |
|
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my $tfilter = join(' & ', @tfilters); |
| 401 |
|
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# get set of objects from odbms by object name |
| 403 |
my $remote = $self->{_COREHANDLE}->remote($nodename); |
| 404 |
|
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# was: |
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#@results = $self->{COREHANDLE}->select($object_set, $tfilter); |
| 407 |
|
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# is: |
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# HACK: build eval-string (sorry) to get filtered list - please give advice here |
| 410 |
my $evalstring = 'return $self->{_COREHANDLE}->select($remote, ' . $tfilter . ');'; |
| 411 |
|
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# get filtered list/set |
| 413 |
@results = eval($evalstring); |
| 414 |
die $@ if $@; |
| 415 |
|
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return \@results; |
| 417 |
} |
| 418 |
|
| 419 |
sub createCursor { |
| 420 |
my $self = shift; |
| 421 |
my $node = shift; |
| 422 |
my $cmdHandle = $self->{_COREHANDLE}->cursor($node); |
| 423 |
my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $cmdHandle ); |
| 424 |
return $result; |
| 425 |
} |
| 426 |
|
| 427 |
sub createSet { |
| 428 |
my $self = shift; |
| 429 |
my @objects = @_; |
| 430 |
my $rh = Set::Object->new(); |
| 431 |
foreach (@objects) { |
| 432 |
#print Dumper($_); |
| 433 |
$rh->insert($_) if !isEmpty($_); |
| 434 |
} |
| 435 |
#print Dumper($rh->members()); |
| 436 |
my $result = Data::Storage::Result::Tangram->new( RESULTHANDLE => $rh ); |
| 437 |
return $result; |
| 438 |
} |
| 439 |
|
| 440 |
sub sendQuery { |
| 441 |
my $self = shift; |
| 442 |
my $query = shift; |
| 443 |
#my $sql = "SELECT cs FROM $self->{metainfo}->{$descent}->{node} WHERE $self->{metainfo}->{$descent}->{IdentProvider}->{arg}='$self->{entry}->{source}->{ident}';"; |
| 444 |
#my $result = $self->{metainfo}->{$descent}->{storage}->sendCommand($sql); |
| 445 |
|
| 446 |
#print Dumper($query); |
| 447 |
|
| 448 |
# HACK: special case: querying by id does not translate into a common tangram query |
| 449 |
# just load the object by given id(ent) |
| 450 |
if ($query->{criterias}->[0]->{key} eq 'id' && $query->{criterias}->[0]->{op} eq 'eq') { |
| 451 |
#print "LOAD!!!", "\n"; |
| 452 |
#exit; |
| 453 |
#return Set::Object->new( $self->{COREHANDLE}->load($query->{criterias}->[0]->{val}) ); |
| 454 |
my $ident = $query->{criterias}->[0]->{val}; |
| 455 |
#print "load obj", "\n"; |
| 456 |
#return $self->createSet() if $ident == 5; |
| 457 |
my $object = $self->{_COREHANDLE}->load($ident); |
| 458 |
#print "get id", "\n"; |
| 459 |
my $oid = $self->{_COREHANDLE}->id($object); |
| 460 |
return $self->createSet($object); |
| 461 |
#return $self->createSet( $self->{COREHANDLE}->load('300090018') ); |
| 462 |
} |
| 463 |
|
| 464 |
die("This should not be reached for now - redirect to \$self->getListFiltered() here!"); |
| 465 |
|
| 466 |
# TODO: do a common tangram query here |
| 467 |
|
| 468 |
my @crits; |
| 469 |
foreach (@{$query->{criterias}}) { |
| 470 |
my $op = ''; |
| 471 |
$op = '=' if lc $_->{op} eq 'eq'; |
| 472 |
push @crits, "$_->{key}$op'$_->{val}'"; |
| 473 |
} |
| 474 |
my $subnodes = {}; |
| 475 |
map { $subnodes->{$_}++ } @{$query->{subnodes}}; |
| 476 |
# HACK: this is hardcoded ;( expand possibilities! |
| 477 |
#my $crit = join(' AND ', @crits); |
| 478 |
#my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit); |
| 479 |
#return $self->sendCommand($sql); |
| 480 |
#my $h = $self->{COREHANDLE}->remote($query->{node}); |
| 481 |
#my $res = $self->{COREHANDLE}->select($h, $h->{); |
| 482 |
return $self->createCursor($query->{node}); |
| 483 |
} |
| 484 |
|
| 485 |
sub eraseAll { |
| 486 |
my $self = shift; |
| 487 |
my $classname = shift; |
| 488 |
my $remote = $self->{_COREHANDLE}->remote($classname); |
| 489 |
my @objs = $self->{_COREHANDLE}->select($remote); |
| 490 |
$self->{_COREHANDLE}->erase(@objs); |
| 491 |
} |
| 492 |
|
| 493 |
sub createDb { |
| 494 |
my $self = shift; |
| 495 |
my $storage = $self->_getSubLayerHandle(); |
| 496 |
return $storage->createDb(); |
| 497 |
} |
| 498 |
|
| 499 |
sub getObject { |
| 500 |
my $self = shift; |
| 501 |
my $oid = shift; |
| 502 |
my $options = shift; |
| 503 |
|
| 504 |
# TODO: create a deep_unload method (currently _all_ objects are unloaded) |
| 505 |
# unload($oid) will only unload object, not deep object hashes |
| 506 |
$self->{_COREHANDLE}->unload() if ($options->{destroy}); |
| 507 |
|
| 508 |
# TODO: review this |
| 509 |
#if (!$self->{COREHANDLE}) { return; } |
| 510 |
|
| 511 |
# TODO: review this |
| 512 |
my $object = eval('$self->{_COREHANDLE}->load($oid);'); |
| 513 |
print $@, "\n" if $@; |
| 514 |
|
| 515 |
return $object if $object; |
| 516 |
} |
| 517 |
|
| 518 |
sub getObjectAsHash { |
| 519 |
my $self = shift; |
| 520 |
my $oid = shift; |
| 521 |
my $options = shift; |
| 522 |
my $obj = $self->getObject($oid, $options); |
| 523 |
|
| 524 |
# build options (a callback to unload autovivified objects) for 'expand' |
| 525 |
# TODO: use $logger to write to debug here! |
| 526 |
my $cb; # = sub {}; |
| 527 |
=pod |
| 528 |
if ($options->{destroy}) { |
| 529 |
$options->{cb}->{destroy} = sub { |
| 530 |
print "================ DESTROY", "\n"; |
| 531 |
my $object = shift; |
| 532 |
#print Dumper($object); |
| 533 |
$self->{_COREHANDLE}->unload($object); |
| 534 |
#undef($object); |
| 535 |
}; |
| 536 |
} |
| 537 |
=cut |
| 538 |
|
| 539 |
my $hash = object2hash($obj, $options); |
| 540 |
#$options->{cb}->{destroy}->($obj); |
| 541 |
#$self->{_COREHANDLE}->unload($obj); |
| 542 |
|
| 543 |
# convert values in hash to utf8 to be ready for (e.g.) encapsulation in XML |
| 544 |
# now done in object2hash |
| 545 |
#var2utf8($hash) if ($options->{utf8}); |
| 546 |
|
| 547 |
# old (wrong) attempts to get rid of used instances, if requested |
| 548 |
#$obj->clear_refs; |
| 549 |
#$self->{COREHANDLE}->unload($obj) if($options->{destroy}); |
| 550 |
#$obj->DESTROY; |
| 551 |
#undef($obj) if($options->{destroy}); |
| 552 |
|
| 553 |
return $hash; |
| 554 |
} |
| 555 |
|
| 556 |
sub getSchema { |
| 557 |
return $schema_tangram; |
| 558 |
} |
| 559 |
|
| 560 |
sub getCOREHANDLE { |
| 561 |
my $self = shift; |
| 562 |
return $self->{_COREHANDLE}; |
| 563 |
} |
| 564 |
|
| 565 |
1; |
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