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 $_db_params;
  32
  33         sub db_Handles {
  34                 return ($master_db, @slave_dbs);
  35         }
  36
  37         sub child_init {
  38                 my $self = shift;
  39                 $_db_params = shift;
  40
  41                 $log->debug("Running child_init inside ".__PACKAGE__, INTERNAL);
  42
  43                 $_db_params = [ $_db_params ] unless (ref($_db_params) eq 'ARRAY');
  44
  45                 my %attrs = (   %{$self->_default_attributes},
  46                                 RootClass => 'DBIx::ContextualFetch',
  47                                 ShowErrorStatement => 1,
  48                                 RaiseError => 1,
  49                                 AutoCommit => 1,
  50                                 PrintError => 1,
  51                                 Taint => 1,
  52                                 #TraceLevel => "1|SQL",
  53                                 pg_enable_utf8 => 1,
  54                                 pg_server_prepare => 0,
  55                                 FetchHashKeyName => 'NAME_lc',
  56                                 ChopBlanks => 1,
  57                 );
  58
  59                 my $master = shift @$_db_params;
  60                 $$master{port} ||= '5432';
  61                 $$master{host} ||= 'localhost';
  62                 $$master{db} ||= 'openils';
  63
  64                 $log->debug("Attempting to connect to $$master{db} at $$master{host}", INFO);
  65
  66                 try {
  67                         $master_db = DBI->connect(
  68                                 "dbi:Pg:".
  69                                         "host=$$master{host};".
  70                                         "port=$$master{port};".
  71                                         "dbname=$$master{db}",
  72                                 $$master{user},
  73                                 $$master{pw},
  74                                 \%attrs)
  75                         || do { sleep(1);
  76                                 DBI->connect(
  77                                         "dbi:Pg:".
  78                                                 "host=$$master{host};".
  79                                                 "port=$$master{port};".
  80                                                 "dbname=$$master{db}",
  81                                         $$master{user},
  82                                         $$master{pw},
  83                                         \%attrs) }
  84                         || throw OpenSRF::EX::ERROR
  85                                 ("Couldn't connect to $$master{db}".
  86                                  " on $$master{host}::$$master{port}".
  87                                  " as $$master{user}!!");
  88                 } catch Error with {
  89                         my $e = shift;
  90                         $log->debug("Error connecting to database:\n\t$e\n\t$DBI::errstr", ERROR);
  91                         throw $e;
  92                 };
  93
  94                 $log->debug("Connected to MASTER db $$master{db} at $$master{host}", INFO);
  95
  96                 $master_db->do("SET NAMES '$$master{client_encoding}';") if ($$master{client_encoding});
  97
  98                 for my $db (@$_db_params) {
  99                         try {
 100                                 push @slave_dbs, DBI->connect("dbi:Pg:host=$$db{host};port=$$db{port};dbname=$$db{db}",$$db{user},$$db{pw}, \%attrs)
 101                                         || do { sleep(1); DBI->connect("dbi:Pg:host=$$db{host};port=$$db{port};dbname=$$db{db}",$$db{user},$$db{pw}, \%attrs) }
 102                                         || throw OpenSRF::EX::ERROR
 103                                                 ("Couldn't connect to $$db{db}".
 104                                                 " on $$db{host}::$$db{port}".
 105                                                 " as $$db{user}!!");
 106                         } catch Error with {
 107                                 my $e = shift;
 108                                 $log->debug("Error connecting to database:\n\t$e\n\t$DBI::errstr", ERROR);
 109                                 throw $e;
 110                         };
 111
 112                         $slave_dbs[-1]->do("SET NAMES '$$db{client_encoding}';") if ($$master{client_encoding});
 113
 114                         $log->debug("Connected to MASTER db '$$master{db} at $$master{host}", INFO);
 115                 }
 116
 117                 $log->debug("All is well on the western front", INTERNAL);
 118         }
 119
 120         sub db_Main {
 121                 my $self = shift;
 122                 return $master_db if ($self->current_xact_session || $OpenILS::Application::Storage::WRITE);
 123                 return $master_db unless (@slave_dbs);
 124                 return ($master_db, @slave_dbs)[rand(scalar(@slave_dbs))];
 125         }
 126
 127         sub quote {
 128                 my $self = shift;
 129                 return $self->db_Main->quote(@_)
 130         }
 131
 132 #       sub tsearch2_trigger {
 133 #               my $self = shift;
 134 #               return unless ($self->value);
 135 #               $self->index_vector(
 136 #                       $self->db_Slaves->selectrow_array(
 137 #                               "SELECT to_tsvector('default',?);",
 138 #                               {},
 139 #                               $self->value
 140 #                       )
 141 #               );
 142 #       }
 143
 144         my $_xact_session;
 145
 146         sub current_xact_session {
 147                 my $self = shift;
 148                 if (defined($_xact_session)) {
 149                         return $_xact_session;
 150                 }
 151                 return undef;
 152         }
 153
 154         sub current_xact_is_auto {
 155                 my $self = shift;
 156                 my $auto = shift;
 157                 if (defined($_xact_session) and ref($_xact_session)) {
 158                         if (defined $auto) {
 159                                 $_xact_session->session_data(autocommit => $auto);
 160                         }
 161                         return $_xact_session->session_data('autocommit');
 162                 }
 163         }
 164
 165         sub current_xact_id {
 166                 my $self = shift;
 167                 if (defined($_xact_session) and ref($_xact_session)) {
 168                         return $_xact_session->session_id;
 169                 }
 170                 return undef;
 171         }
 172
 173         sub set_xact_session {
 174                 my $self = shift;
 175                 my $ses = shift;
 176                 if (!defined($ses)) {
 177                         return undef;
 178                 }
 179                 $_xact_session = $ses;
 180                 return $_xact_session;
 181         }
 182
 183         sub unset_xact_session {
 184                 my $self = shift;
 185                 my $ses = $_xact_session;
 186                 undef $_xact_session;
 187                 return $ses;
 188         }
 189
 190 }
 191
 192 1;