Open-ILS/src/perlmods/OpenILS/Application/Storage/Driver/Pg.pm

   1
   2 { # The driver package itself just needs a db_Main method (or db_Slaves if
   3   #Class::DBI::Replication is in use) for Class::DBI to call.
   4   #
   5   # Any other fixups can go in here too... Also, the drivers should subclass the
   6   # DBI driver that they are wrapping, or provide a 'quote()' method that calls
   7   # the DBD::xxx::quote() method on FTI's behalf.
   8   #
   9   # The dirver MUST be a subclass of Class::DBI(::Replication) and
  10   # OpenILS::Application::Storage.
  11   #-------------------------------------------------------------------------------
  12         package OpenILS::Application::Storage::Driver::Pg;
  13         use OpenILS::Application::Storage::Driver::Pg::cdbi;
  14         use OpenILS::Application::Storage::Driver::Pg::fts;
  15         use OpenILS::Application::Storage::Driver::Pg::storage;
  16         use OpenILS::Application::Storage::Driver::Pg::dbi;
  17         use Class::DBI;
  18         use base qw/Class::DBI OpenILS::Application::Storage/;
  19         use DBI;
  20         use OpenSRF::EX qw/:try/;
  21         use OpenSRF::DomainObject::oilsResponse;
  22         use OpenSRF::Utils::Logger qw/:level/;
  23         my $log = 'OpenSRF::Utils::Logger';
  24
  25         __PACKAGE__->set_sql( retrieve_limited => 'SELECT * FROM __TABLE__ ORDER BY id LIMIT ?' );
  26         __PACKAGE__->set_sql( copy_start => 'COPY %s (%s) FROM STDIN;' );
  27         __PACKAGE__->set_sql( copy_end => '\.' );
  28
  29         my $master_db;
  30         my @slave_dbs;
  31         my $_db_params;
  32         sub child_init {
  33                 my $self = shift;
  34                 $_db_params = shift;
  35
  36                 $log->debug("Running child_init inside ".__PACKAGE__, INTERNAL);
  37
  38                 $_db_params = [ $_db_params ] unless (ref($_db_params) eq 'ARRAY');
  39
  40                 my %attrs = (   %{$self->_default_attributes},
  41                                 RootClass => 'DBIx::ContextualFetch',
  42                                 ShowErrorStatement => 1,
  43                                 RaiseError => 1,
  44                                 AutoCommit => 1,
  45                                 PrintError => 1,
  46                                 Taint => 1,
  47                                 pg_enable_utf8 => 1,
  48                                 FetchHashKeyName => 'NAME_lc',
  49                                 ChopBlanks => 1,
  50                 );
  51
  52                 my $master = shift @$_db_params;
  53                 $log->debug("Attmpting to connet to $$master{db} at $$master{host}", INFO);
  54
  55                 try {
  56                         $master_db = DBI->connect("dbi:Pg:host=$$master{host};dbname=$$master{db}",$$master{user},$$master{pw}, \%attrs) ||
  57                                 throw OpenSRF::EX::ERROR ("Couldn't connect to $$master{db} on $$master{host} as $$master{user}!!");
  58                 } catch Error with {
  59                         my $e = shift;
  60                         $log->debug("Error connecting to database:\n\t$e\n\t$DBI::errstr", ERROR);
  61                         throw $e;
  62                 };
  63
  64                 $log->debug("Connected to MASTER db $$master{db} at $$master{host}", INFO);
  65
  66                 $master_db->do("SET NAMES '$$master{client_encoding}';") if ($$master{client_encoding});
  67
  68                 for my $db (@$_db_params) {
  69                         push @slave_dbs, DBI->connect("dbi:Pg:host=$$db{host};dbname=$$db{db}",$$db{user},$$db{pw}, \%attrs);
  70                         $slave_dbs[-1]->do("SET NAMES '$$db{client_encoding}';") if ($$master{client_encoding});
  71
  72                         $log->debug("Connected to MASTER db '$$master{db} at $$master{host}", INFO);
  73                 }
  74
  75                 $log->debug("All is well on the western front", INTERNAL);
  76         }
  77
  78         sub db_Main {
  79                 my $self = shift;
  80                 return $master_db if ($self->current_xact_session);
  81                 return $master_db unless (@slave_dbs);
  82                 return ($master_db, @slave_dbs)[rand(scalar(@slave_dbs))];
  83         }
  84
  85         sub quote {
  86                 my $self = shift;
  87                 return $self->db_Main->quote(@_)
  88         }
  89
  90 #       sub tsearch2_trigger {
  91 #               my $self = shift;
  92 #               return unless ($self->value);
  93 #               $self->index_vector(
  94 #                       $self->db_Slaves->selectrow_array(
  95 #                               "SELECT to_tsvector('default',?);",
  96 #                               {},
  97 #                               $self->value
  98 #                       )
  99 #               );
 100 #       }
 101
 102         my $_xact_session;
 103
 104         sub current_xact_session {
 105                 my $self = shift;
 106                 if (defined($_xact_session)) {
 107                         return $_xact_session;
 108                 }
 109                 return undef;
 110         }
 111
 112         sub current_xact_is_auto {
 113                 my $self = shift;
 114                 my $auto = shift;
 115                 if (defined($_xact_session) and ref($_xact_session)) {
 116                         if (defined $auto) {
 117                                 $_xact_session->session_data(autocommit => $auto);
 118                         }
 119                         return $_xact_session->session_data('autocommit');
 120                 }
 121         }
 122
 123         sub current_xact_id {
 124                 my $self = shift;
 125                 if (defined($_xact_session) and ref($_xact_session)) {
 126                         return $_xact_session->session_id;
 127                 }
 128                 return undef;
 129         }
 130
 131         sub set_xact_session {
 132                 my $self = shift;
 133                 my $ses = shift;
 134                 if (!defined($ses)) {
 135                         return undef;
 136                 }
 137                 $_xact_session = $ses;
 138                 return $_xact_session;
 139         }
 140
 141         sub unset_xact_session {
 142                 my $self = shift;
 143                 my $ses = $_xact_session;
 144                 undef $_xact_session;
 145                 return $ses;
 146         }
 147
 148 }
 149
 150 1;