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################################# |
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# |
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# $Id: DBI.pm,v 1.7 2002/12/01 07:09:09 joko Exp $ |
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# |
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# $Log: DBI.pm,v $ |
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# Revision 1.7 2002/12/01 07:09:09 joko |
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# + sub getListFiltered (dummy redirecting to getListUnfiltered) |
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# |
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# Revision 1.6 2002/12/01 04:46:01 joko |
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# + sub eraseAll |
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# |
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# Revision 1.5 2002/11/29 05:00:26 joko |
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# + sub getListUnfiltered |
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# + sub sendQuery |
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# |
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# Revision 1.4 2002/11/17 08:46:42 jonen |
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# + wrapped eval around DBI->connect to prevent deaths |
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# |
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# Revision 1.3 2002/11/17 06:34:39 joko |
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# + locator metadata can now be reached via ->{locator} |
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# - sub hash2sql now taken from libdb |
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# |
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# Revision 1.2 2002/10/25 11:43:27 joko |
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# + enhanced robustness |
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# + more logging for debug-levels |
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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::DBI; |
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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 DBI; |
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use Data::Dumper; |
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use libdb qw( getDbNameByDsn hash2Sql ); |
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use Data::Storage::Result::DBI; |
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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 connect { |
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|
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my $self = shift; |
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|
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# create handle |
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if ( my $dsn = $self->{locator}->{dbi}->{dsn} ) { |
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#if ( my $dsn = $self->{locator}->{dsn} ) { |
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$logger->debug( __PACKAGE__ . "->connect( dsn $dsn )" ); |
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|
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# HACK: |
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# set errorhandler before actually calling DBI->connect |
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# in order to catch errors from the very beginning |
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#DBI->{HandleError} = $self->{dbi}->{HandleError}; |
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|
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#use Data::Dumper; print Dumper($self->{dbi}); |
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|
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eval { |
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$self->{COREHANDLE} = DBI->connect( $dsn, '', '', $self->{locator}->{dbi} ); |
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if (!$self->{COREHANDLE}) { |
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$logger->warning( __PACKAGE__ . "->connect failed: " . DBI::errstr ); |
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return; |
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} |
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}; |
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$logger->warning( __PACKAGE__ . "->connect failed: " . $@ ) if $@; |
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|
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} |
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$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 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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return if !$self->{COREHANDLE}; |
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|
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# apply configured modifications to DBI-handle |
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if (exists $self->{locator}->{dbi}->{trace_level} && exists $self->{locator}->{dbi}->{trace_file}) { |
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$self->{COREHANDLE}->trace($self->{locator}->{dbi}->{trace_level}, $self->{locator}->{dbi}->{trace_file}); |
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} |
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if (exists $self->{locator}->{dbi}->{RaiseError}) { |
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$self->{COREHANDLE}->{RaiseError} = $self->{locator}->{dbi}->{RaiseError}; |
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} |
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if (exists $self->{locator}->{dbi}->{PrintError}) { |
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$self->{COREHANDLE}->{PrintError} = $self->{locator}->{dbi}->{PrintError}; |
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} |
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if (exists $self->{locator}->{dbi}->{HandleError}) { |
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$self->{COREHANDLE}->{HandleError} = $self->{locator}->{dbi}->{HandleError}; |
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} |
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|
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} |
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|
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sub _sendSql { |
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my $self = shift; |
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my $sql = shift; |
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|
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# two-level handling for implicit connect: |
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# if there's no corehandle ... |
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if (!$self->{COREHANDLE}) { |
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# ... try to connect, but ... |
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$self->connect(); |
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# ... if this still fails, there's something wrong probably, so we won't continue |
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if (!$self->{COREHANDLE}) { |
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return; |
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} |
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} |
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|
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#print "prepare sql: $sql\n"; |
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|
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my $sth = $self->{COREHANDLE}->prepare($sql); |
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$sth->execute(); |
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return $sth; |
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} |
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|
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sub sendCommand { |
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my $self = shift; |
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my $command = shift; |
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# TODO: when tracing: yes, do actually log this |
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#$logger->debug( __PACKAGE__ . "->sendCommand( command $command )" ); |
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my $cmdHandle = $self->_sendSql($command); |
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my $result = Data::Storage::Result::DBI->new( RESULTHANDLE => $cmdHandle ); |
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return $result; |
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} |
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|
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sub getChildNodes { |
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my $self = shift; |
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my @nodes; |
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$logger->debug( __PACKAGE__ . "->getChildNodes()" ); |
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if (my $result = $self->sendCommand( 'SHOW TABLES;' ) ) { |
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my $dbname = getDbNameByDsn($self->{locator}->{dbi}->{dsn}); |
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my $key = "Tables_in_$dbname"; |
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while ( my $row = $result->getNextEntry() ) { |
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push @nodes, $row->{$key}; |
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} |
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} |
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return \@nodes; |
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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 $nodename = shift; |
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my @list; |
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$logger->debug( __PACKAGE__ . "->getListUnfiltered( nodename => '" . $nodename . "' )" ); |
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# get list of rows from rdbms by table name |
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my $result = $self->sendCommand("SELECT * FROM $nodename"); |
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while ( my $row = $result->getNextEntry() ) { |
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push @list, $row; |
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} |
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return \@list; |
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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($sql); |
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my @crits; |
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foreach (@{$query->{criterias}}) { |
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my $op = ''; |
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$op = '=' if lc $_->{op} eq 'eq'; |
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push @crits, "$_->{key}$op'$_->{val}'"; |
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} |
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my $subnodes = {}; |
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map { $subnodes->{$_}++ } @{$query->{subnodes}}; |
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# HACK: this is hardcoded ;( expand possibilities! |
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my $crit = join(' AND ', @crits); |
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my $sql = hash2Sql($query->{node}, $subnodes, 'SELECT', $crit); |
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return $self->sendCommand($sql); |
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} |
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|
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sub eraseAll { |
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my $self = shift; |
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my $classname = shift; |
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my $sql = "DELETE FROM $classname"; |
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$self->sendCommand($sql); |
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} |
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|
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# TODO: actually implement the filtering functionality using $this->sendQuery |
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sub getListFiltered { |
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my $self = shift; |
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my $nodename = shift; |
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return $self->getListUnfiltered($nodename); |
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} |
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|
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# TODO: do this via a parametrized "$self->connect(<connect just to database server - don't select database>)" |
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sub createDb { |
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|
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my $self = shift; |
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|
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# get dsn from Data::Storage::Locator instance |
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my $dsn = $self->{locator}->{dbi}->{dsn}; |
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|
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$logger->debug( __PACKAGE__ . "->createDb( dsn $dsn )" ); |
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|
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# remove database setting from dsn-string |
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$dsn =~ s/database=(.+?);//; |
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|
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# remember extracted database name to know what actually to create right now |
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my $database_name = $1; |
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|
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# flag to indicate goodness |
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my $ok; |
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|
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# connect to database server - don't select/use any specific database |
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#if ( my $dbh = DBI->connect($dsn, '', '', { PrintError => 0 } ) ) { |
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if ( my $dbh = DBI->connect($dsn, '', '', $self->{locator}->{dbi} ) ) { |
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|
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if ($database_name) { |
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if ($dbh->do("CREATE DATABASE $database_name")) { |
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$ok = 1; |
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} |
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} |
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|
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$dbh->disconnect(); |
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|
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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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|
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