7 use English qw(-no_match_vars);
9 use Rose::DBx::Cache::Anywhere;
10 use Scalar::Util qw(blessed);
12 use base qw(Rose::DB);
14 __PACKAGE__->db_cache_class('Rose::DBx::Cache::Anywhere');
15 __PACKAGE__->use_private_registry;
22 # runtime require to break circular include
23 require SL::DBConnect;
24 return SL::DBConnect->connect(@_);
28 my $domain = shift || SL::DB->default_domain;
29 my $type = shift || SL::DB->default_type;
31 ($domain, $type) = _register_db($domain, $type);
33 my $db = __PACKAGE__->new_or_cached(domain => $domain, type => $type);
39 create(undef, 'KIVITENDO');
43 create(undef, 'KIVITENDO_AUTH');
50 require SL::DBConnect;
51 my %specific_connect_settings;
52 my %common_connect_settings = (
54 european_dates => ((SL::DBConnect->get_datestyle || '') =~ m/european/i) ? 1 : 0,
60 if (($type eq 'KIVITENDO_AUTH') && $::auth && $::auth->{DB_config} && $::auth->session_tables_present) {
61 %specific_connect_settings = (
62 database => $::auth->{DB_config}->{db},
63 host => $::auth->{DB_config}->{host} || 'localhost',
64 port => $::auth->{DB_config}->{port} || 5432,
65 username => $::auth->{DB_config}->{user},
66 password => $::auth->{DB_config}->{password},
69 } elsif ($::auth && $::auth->client) {
70 my $client = $::auth->client;
71 %specific_connect_settings = (
72 database => $client->{dbname},
73 host => $client->{dbhost} || 'localhost',
74 port => $client->{dbport} || 5432,
75 username => $client->{dbuser},
76 password => $client->{dbpasswd},
79 } elsif (%::myconfig && $::myconfig{dbname}) {
80 %specific_connect_settings = (
81 database => $::myconfig{dbname},
82 host => $::myconfig{dbhost} || 'localhost',
83 port => $::myconfig{dbport} || 5432,
84 username => $::myconfig{dbuser},
85 password => $::myconfig{dbpasswd},
89 $type = 'KIVITENDO_EMPTY';
92 my %connect_settings = (%common_connect_settings, %specific_connect_settings);
93 my %flattened_settings = _flatten_settings(%connect_settings);
95 $domain = 'KIVITENDO' if $type =~ m/^KIVITENDO/;
96 $type .= join($SUBSCRIPT_SEPARATOR, map { ($_, $flattened_settings{$_} || '') } sort grep { $_ ne 'dbpasswd' } keys %flattened_settings);
97 my $idx = "${domain}::${type}";
99 if (!$_db_registered{$idx}) {
100 $_db_registered{$idx} = 1;
102 __PACKAGE__->register_db(domain => $domain,
108 return ($domain, $type);
111 sub _flatten_settings {
115 while (my ($key, $value) = each %settings) {
116 if ('HASH' eq ref $value) {
117 %flattened = ( %flattened, _flatten_settings(%{ $value }) );
119 $flattened{$key} = $value;
126 sub with_transaction {
127 my ($self, $code, @args) = @_;
129 return $code->(@args) if $self->in_transaction;
131 my (@result, $result);
135 my $return_array = wantarray;
138 ? $self->do_transaction(sub { @result = $code->(@args) })
139 : $self->do_transaction(sub { $result = $code->(@args) });
141 my $error = $self->error;
142 if (blessed $error) {
143 if ($error->isa('SL::X::DBError')) {
144 # gobble the exception
153 return $return_array ? @result : $result;
165 SL::DB - Database access class for all RDB objects
171 =item C<create $domain, $type>
173 Registers the database information with Rose, creates a cached
174 connection and executes initial SQL statements. Those can include
175 setting the time & date format to the user's preferences.
177 =item C<dbi_connect $dsn, $login, $password, $options>
179 Forwards the call to L<SL::DBConnect/connect> which connects to the
180 database. This indirection allows L<SL::DBConnect/connect> to route
181 the calls through L<DBIx::Log4Perl> if this is enabled in the
184 =item C<with_transaction $code_ref, @args>
186 Executes C<$code_ref> with parameters C<@args> within a transaction,
187 starting one only if none is currently active. Example:
189 return $self->db->with_transaction(sub {
190 # do stuff with $self
193 This is a wrapper around L<Rose::DB/do_transaction> that does a few additional
194 things, and should always be used in favour of the other:
198 =item Composition of transactions
200 When C<with_transaction> is called without a running transaction, a new one is
201 created. If it is called within a running transaction, it performs no
202 additional handling. This means that C<with_transaction> can be safely used
203 within another C<with_transaction>, whereas L<Rose::DB/do_transaction> can not.
207 C<with_transaction> adopts the behaviour of C<eval> in that it returns the
208 result of the inner block, and C<undef> if an error occured. This way you can
209 use the same pattern you would normally use with C<eval> for
212 SL::DB->client->with_transaction(sub {
214 # and return nominal true value
217 # transaction error handling
218 my $error = SL::DB->client->error;
221 or you can use it to safely calulate things.
225 The original L<Rose::DB/do_transaction> gobbles up all execptions and expects
226 the caller to manually check return value and error, and then to process all
227 exceptions as strings. This is very fragile and generally a step backwards from
228 proper exception handling.
230 C<with_transaction> only gobbles up exception that are used to signal an
231 error in the transaction, and returns undef on those. All other exceptions
232 bubble out of the transaction like normal, so that it is transparent to typoes,
233 runtime exceptions and other generally wanted things.
235 If you just use the snippet above, your code will catch everything related to
236 the transaction aborting, but will not catch other errors that might have been
237 thrown. The transaction will be rollbacked in both cases.
239 If you want to play nice in case your transaction is embedded in another
240 transaction, just rethrow the error:
242 $db->with_transaction(sub {
243 # code deep in the engine
245 }) or die $db->error;
257 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>