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package Pixie::Store::BerkeleyDB; |
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use Storable qw/nfreeze thaw/; |
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use BerkeleyDB; |
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use File::Spec; |
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our $VERSION="2.06"; |
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use base qw/Pixie::Store/; |
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sub new { |
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my $proto = shift; |
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my $self = bless { db => undef }, $proto; |
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$self->init; |
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return $self; |
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} |
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sub init { $_[0] } |
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sub connect { |
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my $self = shift; |
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my($vol, $dir, $file) = File::Spec->splitpath( shift ); |
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$dir ||= File::Spec->curdir; |
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$self = $self->new unless ref $self; |
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$self->db(BerkeleyDB::Hash->new |
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( |
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-Env => |
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BerkeleyDB::Env->new( -Home => File::Spec->catpath($vol, $dir, ''), |
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-Flags => (DB_CREATE | DB_INIT_LOCK | |
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DB_INIT_MPOOL | |
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DB_INIT_TXN | DB_RECOVER), ), |
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-Filename => $file, |
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-Flags => DB_CREATE, )); |
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return $self; |
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} |
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sub db { |
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my $self = shift; |
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if (@_) { |
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my $db = shift; |
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die "Pixie::Store::BerkeleyDB::db must be an instance of BerkeleyDB::Common" |
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unless defined($db) && $db->isa('BerkeleyDB::Common'); |
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$self->{db} = $db; |
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return $self; |
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} |
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else { |
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return $self->{db} ||= $self->make_in_memory_db; |
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} |
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} |
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sub make_in_memory_db { |
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my $self = shift; |
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BerkeleyDB::Hash->new( -Flags => DB_CREATE, ); |
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} |
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sub store_at { |
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my $self = shift; |
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my($oid, $obj) = @_; |
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$self->db->db_put($oid, nfreeze($obj)); |
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return ($oid, $obj); |
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} |
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sub get_object_at { |
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my $self = shift; |
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my($oid) = @_; |
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my($val); |
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$self->db->db_get($oid,$val); |
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return thaw $val; |
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} |
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sub _delete { |
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my $self = shift; |
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my($oid) = @_; |
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my $val; |
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my $db = $self->db; |
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my $ret = $db->db_get($oid, $val) == 0; |
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$db->db_del($oid); |
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return $ret; |
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} |
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sub clear { |
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my $self = shift; |
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$self->lock; |
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my $cursor = $self->db->db_cursor; |
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my($k,$v) = ('',''); |
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while ($cursor->c_get($k,$v, DB_NEXT) != DB_NOTFOUND) { |
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$cursor->c_del |
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} |
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$cursor->c_close; |
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$self->unlock; |
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} |
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sub lock { $_[0] } |
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sub unlock { $_[0] } |
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sub rollback { $_[0] } |
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sub rootset { |
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my $self = shift; |
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my @set = $self->_rootset_hash->keys; |
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return @set; |
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} |
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sub _rootset_hash { |
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my $self = shift; |
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my $set = shift; |
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unless ($set = $self->get_object_at('')) { |
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$set = Pixie::BDB::Rootset->new; |
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} |
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return $set; |
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} |
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sub db_keys { |
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my $self = shift; |
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my @keys; |
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my $cursor = $self->db->db_cursor; |
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my($k,$v) = ('',''); |
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push @keys, $k while $cursor->c_get($k,$v, DB_NEXT) == 0; |
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return @keys; |
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} |
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sub working_set_for { |
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my $self = shift; |
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my $pixie = shift; |
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my %set = map { $_ => undef } grep !/^db_keys; |
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delete $set{$self->object_graph_for($pixie)->PIXIE::oid}; |
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wantarray ? keys %set : [keys %set]; |
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} |
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sub _add_to_rootset { |
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my $self = shift; |
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my $oid = shift->PIXIE::oid; |
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my $set = $self->_rootset_hash; |
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$set->{$oid} = 1; |
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$self->store_at('' => $set); |
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return $self; |
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} |
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sub remove_from_rootset { |
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my $self = shift; |
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my $oid = shift; |
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my $set = $self->_rootset_hash; |
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delete $set->{$oid}; |
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$self->store_at('' => $set); |
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return $self; |
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} |
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154
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package Pixie::BDB::Rootset; |
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sub new { bless {}, $_[0] } |
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sub keys { keys %{$_[0]} } |
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159
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1; |