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############################################################################# |
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# |
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# Apache::Session::Store::DBMS |
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# Implements session object storage via DBMS module |
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# Copyright(c) 2005 Asemantics S.r.l. |
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# Alberto Reggiori (alberto@asemantics.com) |
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# Distribute under a BSD license (see LICENSE file in main dir) |
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# |
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############################################################################ |
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package Apache::Session::Store::DBMS; |
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use strict; |
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use vars qw($VERSION); |
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use DBMS; |
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$VERSION = '0.1'; |
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$Apache::Session::Store::DBMS::DataSource = 'sessions'; |
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$Apache::Session::Store::DBMS::Host = 'localhost'; |
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$Apache::Session::Store::DBMS::Port = 1234; |
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$Apache::Session::Store::DBMS::Mode = &DBMS::XSMODE_CREAT; |
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$Apache::Session::Store::DBMS::Bt_compare = 0; #none |
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sub connection { |
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my $self = shift; |
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my $session = shift; |
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return |
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if(defined $self->{dbh}); |
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if( (exists $session->{args}->{Handle}) && |
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(UNIVERSAL::isa( $session->{args}->{Handle}, "DBMS" )) ) { |
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$self->{dbh} = $session->{args}->{Handle}; |
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return; |
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}; |
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my $mode = $session->{args}->{Mode} || |
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$Apache::Session::Store::DBMS::Mode; |
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my $bt_compare = $session->{args}->{Bt_compare} || |
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$Apache::Session::Store::DBMS::Bt_compare; |
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my ($datasource, $host, $port); |
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if( $session->{isObjectPerKey} ) { |
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if( $session->{data}->{_session_id} =~ m|^\s*dbms://([^:]+):(\d+)/([^\s]+)| ) { |
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$host = $1; |
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$port = $2; |
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$datasource = $3; |
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} elsif( $session->{data}->{_session_id} =~ m|^\s*dbms://([^/]+)/([^\s]+)| ) { |
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$host = $1; |
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$port = $session->{args}->{Port} || |
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$Apache::Session::Store::DBMS::Port; |
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$datasource = $2; |
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} else { |
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die "Invalid session identifier ".$session->{data}->{_session_id}; |
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}; |
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} elsif( ( exists $session->{args}->{DataSource} ) && |
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( $session->{args}->{DataSource} =~ m|^\s*dbms://| ) ) { |
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if( $session->{args}->{DataSource} =~ m|^\s*dbms://([^:]+):(\d+)/([^\s]+)| ) { |
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$host = $1; |
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$port = $2; |
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$datasource = $3; |
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} elsif( $session->{args}->{DataSource} =~ m|^\s*dbms://([^/]+)/([^\s]+)| ) { |
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$host = $1; |
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$port = $session->{args}->{Port} || |
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$Apache::Session::Store::DBMS::Port; |
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$datasource = $2; |
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} else { |
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die "Invalid session identifier ".$session->{data}->{_session_id}; |
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}; |
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} else { |
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$datasource = $session->{args}->{DataSource} || |
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$Apache::Session::Store::DBMS::DataSource; |
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$host = $session->{args}->{Host} || |
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$Apache::Session::Store::DBMS::Host; |
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$port = $session->{args}->{Port} || |
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$Apache::Session::Store::DBMS::Port; |
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}; |
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#print "TIE: $datasource, $mode, $bt_compare, $host, $port (session_id=".$session->{data}->{_session_id}.")\n"; |
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$self->{dbh} = tie %{$self->{dbms}}, 'DBMS', $datasource, $mode, $bt_compare, $host, $port |
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or die $DBMS::ERROR."\n"; |
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}; |
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sub new { |
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my $class = shift; |
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return bless {dbms => {}}, $class; |
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}; |
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sub insert { |
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my $self = shift; |
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my $session = shift; |
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return |
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if( $session->{isObjectPerKey} ); |
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$self->connection($session); |
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if (exists $self->{dbms}->{$session->{data}->{_session_id}}) { |
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die "Object already exists in the data store"; |
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}; |
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$self->{dbms}->{$session->{data}->{_session_id}} = $session->{serialized}; # single session-id object |
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}; |
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sub update { |
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my $self = shift; |
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my $session = shift; |
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return |
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if( $session->{isObjectPerKey} ); |
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$self->connection($session); |
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$self->{dbms}->{$session->{data}->{_session_id}} = $session->{serialized} |
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if(defined $session->{data}->{_session_id}); |
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}; |
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sub materialize { |
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my $self = shift; |
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my $session = shift; |
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return |
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if( $session->{isObjectPerKey} ); |
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$self->connection($session); |
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$session->{serialized} = $self->{dbms}->{$session->{data}->{_session_id}}; |
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if (!defined $session->{serialized}) { |
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die "Object does not exist in data store"; |
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}; |
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}; |
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sub remove { |
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my $self = shift; |
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my $session = shift; |
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return |
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if( $session->{isObjectPerKey} ); |
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$self->connection($session); |
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delete $self->{dbms}->{$session->{data}->{_session_id}}; |
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}; |
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sub DESTROY { |
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my $self = shift; |
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if(defined $self->{dbh}) { |
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delete $self->{dbh}; |
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untie %{$self->{dbms}}; |
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}; |
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}; |
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1; |
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=pod |
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=head1 NAME |
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Apache::Session::Store::DBMS - Use DBMS to store persistent objects |
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=head1 SYNOPSIS |
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use Apache::Session::Store::DBMS; |
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my $store = new Apache::Session::Store::DBMS; |
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$store->insert($ref); |
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$store->update($ref); |
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$store->materialize($ref); |
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$store->remove($ref); |
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=head1 DESCRIPTION |
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This module fulfills the storage interface of Apache::Session. The serialized |
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objects are stored in a remote hashed Berkeley DB store using the DBMS Perl module. |
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=head1 OPTIONS |
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This module requires... |
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=head1 AUTHOR |
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This module was written by Alberto Reggiori |
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=head1 SEE ALSO |
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L, L |
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http://rdfstore.sf.net/dbms.html |