From: David Kamholz <davekam@pobox.com>
Date: Tue, 27 Sep 2005 22:36:23 +0000 (+0000)
Subject: added experimental ObjectCache.pm (load before Core), no tests yet and not included... 
X-Git-Tag: v0.05005~206
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=bb37a8cfe91fcbaa4f1294c2877bd33aa77a49e1;p=dbsrgits%2FDBIx-Class.git

added experimental ObjectCache.pm (load before Core), no tests yet and not included by default, but the basics work -- improvements welcome
---

diff --git a/lib/DBIx/Class/ObjectCache.pm b/lib/DBIx/Class/ObjectCache.pm
new file mode 100644
index 0000000..1d8a082
--- /dev/null
+++ b/lib/DBIx/Class/ObjectCache.pm
@@ -0,0 +1,66 @@
+package DBIx::Class::ObjectCache;
+
+use strict;
+use warnings;
+
+use base qw/Class::Data::Inheritable/;
+
+__PACKAGE__->mk_classdata('cache');
+
+sub insert {
+  my $self = shift;
+  $self->NEXT::ACTUAL::insert(@_);
+  $self->_insert_into_cache if $self->cache;  
+  return $self;
+}
+
+sub find {
+  my ($self,@vals) = @_;
+  return $self->NEXT::ACTUAL::find(@vals) unless $self->cache;
+  
+  # this is a terrible hack here. I know it can be improved.
+  # but, it's a start anyway. probably find in PK.pm needs to
+  # call a hook, or some such thing. -Dave/ningu
+  my ($object,$key);
+  my @pk = keys %{$self->_primaries};
+  if (ref $vals[0] eq 'HASH') {
+    my $cond = $vals[0]->{'-and'};
+    $key = $self->_create_ID(%{$cond->[0]}) if ref $cond eq 'ARRAY';
+  } elsif (@pk == @vals) {
+    my %data;
+    @data{@pk} = @vals;
+    $key = $self->_create_ID(%data);
+  } else {
+    $key = $self->_create_ID(@vals);
+  }
+  if ($key and $object = $self->cache->get($key)) {
+    return $object;
+  }
+  
+  $object = $self->NEXT::ACTUAL::find(@vals);
+  $object->_insert_into_cache if $object;
+  return $object;
+}
+
+sub update {
+  my $self = shift;
+  $self->cache->remove($self->ID) if $self->cache;
+  return $self->NEXT::ACTUAL::update(@_);
+}
+
+sub delete {
+  my $self = shift;
+  $self->cache->remove($self->ID) if $self->cache;
+  return $self->NEXT::ACTUAL::delete(@_);
+}
+
+sub _insert_into_cache {
+  my ($self) = @_;
+  if (my $key = $self->ID) {
+    if (my $object = $self->new( $self->{_column_data} )) {
+      $self->cache->set($key,$object);
+    }
+  }
+}
+
+1;