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                                 #TraceLevel => "1|SQL",
  48                                 pg_enable_utf8 => 1,
  49                                 pg_server_prepare => 0,
  50                                 FetchHashKeyName => 'NAME_lc',
  51                                 ChopBlanks => 1,
  52                 );
  53
  54                 my $master = shift @$_db_params;
  55                 $$master{port} ||= '5432';
  56                 $$master{host} ||= 'localhost';
  57                 $$master{db} ||= 'openils';
  58
  59                 $log->debug("Attmpting to connet to $$master{db} at $$master{host}", INFO);
  60
  61                 try {
  62                         $master_db = DBI->connect(
  63                                 "dbi:Pg:".
  64                                         "host=$$master{host};".
  65                                         "port=$$master{port};".
  66                                         "dbname=$$master{db}",
  67                                 $$master{user},
  68                                 $$master{pw},
  69                                 \%attrs) ||
  70                                         throw OpenSRF::EX::ERROR
  71                                                 ("Couldn't connect to $$master{db}".
  72                                                  " on $$master{host}::$$master{port}".
  73                                                  " as $$master{user}!!");
  74                 } catch Error with {
  75                         my $e = shift;
  76                         $log->debug("Error connecting to database:\n\t$e\n\t$DBI::errstr", ERROR);
  77                         throw $e;
  78                 };
  79
  80                 $log->debug("Connected to MASTER db $$master{db} at $$master{host}", INFO);
  81
  82                 $master_db->do("SET NAMES '$$master{client_encoding}';") if ($$master{client_encoding});
  83
  84                 for my $db (@$_db_params) {
  85                         push @slave_dbs, DBI->connect("dbi:Pg:host=$$db{host};dbname=$$db{db}",$$db{user},$$db{pw}, \%attrs);
  86                         $slave_dbs[-1]->do("SET NAMES '$$db{client_encoding}';") if ($$master{client_encoding});
  87
  88                         $log->debug("Connected to MASTER db '$$master{db} at $$master{host}", INFO);
  89                 }
  90
  91                 $log->debug("All is well on the western front", INTERNAL);
  92         }
  93
  94         sub db_Main {
  95                 my $self = shift;
  96                 return $master_db if ($self->current_xact_session);
  97                 return $master_db unless (@slave_dbs);
  98                 return ($master_db, @slave_dbs)[rand(scalar(@slave_dbs))];
  99         }
 100
 101         sub quote {
 102                 my $self = shift;
 103                 return $self->db_Main->quote(@_)
 104         }
 105
 106 #       sub tsearch2_trigger {
 107 #               my $self = shift;
 108 #               return unless ($self->value);
 109 #               $self->index_vector(
 110 #                       $self->db_Slaves->selectrow_array(
 111 #                               "SELECT to_tsvector('default',?);",
 112 #                               {},
 113 #                               $self->value
 114 #                       )
 115 #               );
 116 #       }
 117
 118         my $_xact_session;
 119
 120         sub current_xact_session {
 121                 my $self = shift;
 122                 if (defined($_xact_session)) {
 123                         return $_xact_session;
 124                 }
 125                 return undef;
 126         }
 127
 128         sub current_xact_is_auto {
 129                 my $self = shift;
 130                 my $auto = shift;
 131                 if (defined($_xact_session) and ref($_xact_session)) {
 132                         if (defined $auto) {
 133                                 $_xact_session->session_data(autocommit => $auto);
 134                         }
 135                         return $_xact_session->session_data('autocommit');
 136                 }
 137         }
 138
 139         sub current_xact_id {
 140                 my $self = shift;
 141                 if (defined($_xact_session) and ref($_xact_session)) {
 142                         return $_xact_session->session_id;
 143                 }
 144                 return undef;
 145         }
 146
 147         sub set_xact_session {
 148                 my $self = shift;
 149                 my $ses = shift;
 150                 if (!defined($ses)) {
 151                         return undef;
 152                 }
 153                 $_xact_session = $ses;
 154                 return $_xact_session;
 155         }
 156
 157         sub unset_xact_session {
 158                 my $self = shift;
 159                 my $ses = $_xact_session;
 160                 undef $_xact_session;
 161                 return $ses;
 162         }
 163
 164 }
 165
 166 1;