update
delete
dbh
- txn_do
txn_commit
txn_rollback
sth
);
}
+=head2 execute_reliably ($coderef, ?@args)
+
+Given a coderef, saves the current state of the L</read_handler>, forces it to
+use reliable storage (ie sets it to the master), executes a coderef and then
+restores the original state.
+
+Example:
+
+ my $reliably = sub {
+ my $name = shift @_;
+ $schema->resultset('User')->create({name=>$name});
+ my $user_rs = $schema->resultset('User')->find({name=>$name});
+ };
+
+ $schema->storage->execute_reliably($reliably, 'John');
+
+Use this when you must be certain of your database state, such as when you just
+inserted something and need to get a resultset including it, etc.
+
+=cut
+
+sub execute_reliably {
+ my ($self, $coderef, @args) = @_;
+
+ unless( ref $coderef eq 'CODE') {
+ $self->throw_exception('Second argument must be a coderef');
+ }
+
+ ##Get copy of master storage
+ my $master = $self->master;
+
+ ##Get whatever the current read hander is
+ my $current = $self->read_handler;
+
+ ##Set the read handler to master
+ $self->read_handler($master);
+
+ ## do whatever the caller needs
+ eval {
+ $coderef->(@args);
+ };
+
+ if($@) {
+ $self->throw_exception("coderef returned an error: $@");
+ }
+
+ ##Reset to the original state
+ $self->schema->storage->read_handler($current);
+}
+
=head2 set_reliable_storage
Sets the current $schema to be 'reliable', that is all queries, both read and
$schema->storage->read_handler($write_handler);
}
+=head2 txn_do ($coderef)
+
+Overload to the txn_do method, which is delegated to whatever the
+L<write_handler> is set to. We overload this in order to wrap in inside a
+L</execute_reliably> method.
+
+=cut
+
+sub txn_do {
+ my($self, $coderef, @args) = @_;
+ $self->execute_reliably($coderef, @args);
+}
+
=head2 connected
Check that the master and at least one of the replicants is connected.
=head1 AUTHOR
-Norbert Csongrádi <bert@cpan.org>
+ John Napiorkowski <john.napiorkowski@takkle.com>
-Peter Siklósi <einon@einon.hu>
+Based on code originated by:
-John Napiorkowski <john.napiorkowski@takkle.com>
+ Norbert Csongrádi <bert@cpan.org>
+ Peter Siklósi <einon@einon.hu>
=head1 LICENSE