This is how the txnguard should really work

[dbsrgits/DBIx-Class.git] / lib / DBIx / Class / Storage / TxnScopeGuard.pm

diff --git a/lib/DBIx/Class/Storage/TxnScopeGuard.pm b/lib/DBIx/Class/Storage/TxnScopeGuard.pm
index 5745870..a9228c1 100644 (file)
--- a/lib/DBIx/Class/Storage/TxnScopeGuard.pm
+++ b/lib/DBIx/Class/Storage/TxnScopeGuard.pm
@@ -1,8 +1,8 @@
-package # Hide from pause for now - till we get it working
-  DBIx::Class::Storage::TxnScopeGuard;
+package DBIx::Class::Storage::TxnScopeGuard;
 
 use strict;
 use warnings;
+use Carp::Clan qw/^DBIx::Class/;
 
 sub new {
   my ($class, $storage) = @_;
@@ -18,31 +18,30 @@ sub commit {
   $self->[0] = 1;
 }
 
-sub dismiss {
-  my $self = shift;
-  
-  $self->[0] = 1;
-}
-
 sub DESTROY {
   my ($dismiss, $storage) = @{$_[0]};
 
   return if $dismiss;
 
   my $exception = $@;
-  Carp::cluck("A DBIx::Class:: went out of scope without explicit commit/dismiss")
-    unless $exception; 
+
+  carp 'A DBIx::Class::Storage::TxnScopeGuard went out of scope without explicit commit or error - bad'
+    unless $exception;
+
+  my $rollback_exception;
   {
     local $@;
     eval { $storage->txn_rollback };
-    my $rollback_exception = $@;
-    if($rollback_exception) {
-      my $exception_class = "DBIx::Class::Storage::NESTED_ROLLBACK_EXCEPTION";
-
-      $storage->throw_exception(
-        "Transaction aborted: ${exception}. "
-        . "Rollback failed: ${rollback_exception}"
-      ) unless $rollback_exception =~ /$exception_class/;
+    $rollback_exception = $@;
+  }
+
+  if ($rollback_exception && $rollback_exception !~ /DBIx::Class::Storage::NESTED_ROLLBACK_EXCEPTION/) {
+    if ($exception) {
+      $@ = "Transaction aborted: ${exception} "
+          ."Rollback failed: ${rollback_exception}";
+    }
+    else {
+      carp "Rollback failed: ${rollback_exception}";
     }
   }
 }
@@ -53,7 +52,7 @@ __END__
 
 =head1 NAME
 
-DBIx::Class::Storage::TxnScopeGuard
+DBIx::Class::Storage::TxnScopeGuard - Scope-based transaction handling
 
 =head1 SYNOPSIS
 
@@ -76,14 +75,15 @@ right thing with transactions in DBIx::Class.
 
 =head2 new
 
-Creating an instance of this class will start a new transaction. Expects a
+Creating an instance of this class will start a new transaction (by
+implicitly calling L<DBIx::Class::Storage/txn_begin>. Expects a
 L<DBIx::Class::Storage> object as its only argument.
 
 =head2 commit
 
 Commit the transaction, and stop guarding the scope. If this method is not
-called (i.e. an exception is thrown) and this object goes out of scope then
-the transaction is rolled back.
+called and this object goes out of scope (i.e. an exception is thrown) then
+the transaction is rolled back, via L<DBIx::Class::Storage/txn_rollback>
 
 =cut