summary + patch says it all:

--- twikiplugins/DBCacheContrib/lib/TWiki/Contrib/DBCacheContrib.pm     (revision 7086)
+++ twikiplugins/DBCacheContrib/lib/TWiki/Contrib/DBCacheContrib.pm     (working copy)
@@ -21,7 +21,7 @@
   use TWiki::Contrib::DBCacheContrib;

-  $db = new TWiki::Contrib::DBCacheContrib::DBCache( $web ); # always done
+  $db = new TWiki::Contrib::DBCacheContrib( $web ); # always done
   $db->load(); # may be always done, or only on demand when a tag is parsed that needs it

   # the DB is a hash of topics keyed on their name
@@ -248,11 +248,11 @@
 =cut

 sub onReload {
-       #my ( $this, $@topics) = @_;
+       #my ( $this, @$topics) = @_;
 }

 sub _onReload {
-    my ( $this ) = @_;
+    my $this = shift;

     # Fill in parent relations
     foreach my $topic ( $this->getValues() ) {

Plus some minor docu fixes.

No, your checkin is not working as it does not call $this' instance method of onReload.

 sub _onReload {
-    my ( $this ) = @_;
+    my $this = shift;

     # Fill in parent relations
     foreach my $topic ( $this->getValues() ) {
@@ -262,7 +262,7 @@
         }
     }

-    onReload( @_ );
+    $this->onReload(@_);
 }

SVN 7274 MD