NAME

       Data::Session::Driver::Pg - A persistent session manager

Synopsis

       See Data::Session for details.

Description

       Data::Session::Driver::Pg allows Data::Session to manipulate sessions via DBD::Pg.

       To use this module do both of these:

       o Specify a driver of type Pg, as Data::Session -> new(type => 'driver:Pg ...')
       o Specify a database handle as Data::Session -> new(dbh => $dbh) or a data source as
       Data::Session -> new(data_source => $string)

Case-sensitive Options

       See "Case-sensitive Options" in Data::Session for important information.

Method: new()

       Creates a new object of type Data::Session::Driver::Pg.

       "new()" takes a hash of key/value pairs, some of which might mandatory. Further, some
       combinations might be mandatory.

       The keys are listed here in alphabetical order.

       They are lower-case because they are (also) method names, meaning they can be called to
       set or get the value at any time.

       o data_col_name => $string
           Specifes the name of the column in the sessions table which holds the session data.

           This key is normally passed in as Data::Session -> new(data_col_name => $string).

           Default: 'a_session'.

           This key is optional.

       o data_source => $string
           Specifies the data source (as used by DBI -> connect($data_source, $username,
           $password, $data_source_attr) ) to obtain a database handle.

           This key is normally passed in as Data::Session -> new(data_source => $string).

           Default: ''.

           This key is optional, as long as a value is supplied for 'dbh'.

       o data_source_attr => $hashref
           Specifies the attributes (as used by DBI -> connect($data_source, $username,
           $password, $data_source_attr) ) to obtain a database handle.

           This key is normally passed in as Data::Session -> new(data_source_attr => $hashref).

           Default: {AutoCommit => 1, PrintError => 0, RaiseError => 1}.

           This key is optional.

       o dbh => $dbh
           Specifies the database handle to use to access the sessions table.

           This key is normally passed in as Data::Session -> new(dbh => $dbh).

           If not specified, this module will use the values of these keys to obtain a database
           handle:

           o data_source
           o data_source_attr
           o username
           o password

           Default: ''.

           This key is optional.

       o host => $string
           Not used.

       o id_col_name => $string
           Specifes the name of the column in the sessions table which holds the session id.

           This key is normally passed in as Data::Session -> new(id_col_name => $string).

           Default: 'id'.

           This key is optional.

       o password => $string
           Specifies the password (as used by DBI -> connect($data_source, $username, $password,
           $data_source_attr) ) to obtain a database handle.

           This key is normally passed in as Data::Session -> new(password => $string).

           Default: ''.

           This key is optional.

       o pg_bytea => $boolean
           Specifies (if pg_bytea => 1) that the a_session column in the sessions table is of
           type bytea.

           This key is normally passed in as Data::Session -> new(pg_bytea => $boolean).

           If both 'pg_bytea' and 'pg_text' are set to 1, 'pg_text' is forced to be 0.

           If both 'pg_bytea' and 'pg_text' are set to 0, 'pg_bytea' is forced to be 1.

       o pg_text => $boolean
           Specifies (if pg_text => 1) that the a_session column in the sessions table is of type
           text.

           This key is normally passed in as Data::Session -> new(pg_text => $boolean).

       o port => $string
           Not used.

       o socket => $string
           Not used.

       o table_name => $string
           Specifes the name of the sessions table.

           This key is normally passed in as Data::Session -> new(table_name => $string).

           Default: 'sessions'.

           This key is optional.

       o username => $string
           Specifies the username (as used by DBI -> connect($data_source, $username, $password,
           $data_source_attr) ) to obtain a database handle.

           This key is normally passed in as Data::Session -> new(username => $string).

           Default: ''.

           This key is optional.

       o verbose => $integer
           Print to STDERR more or less information.

           This key is normally passed in as Data::Session -> new(verbose => $integer).

           Typical values are 0, 1 and 2.

           This key is optional.

Method: remove($id)

       Deletes from storage the session identified by $id, or dies if it can't.

       Returns 1.

Method: retrieve($id)

       Retrieve from storage the session identified by $id, or dies if it can't.

       Returns the session.

       This is a frozen session. This value must be thawed by calling the appropriate
       serialization driver's thaw() method.

       Data::Session calls the right thaw() automatically.

Method: store($id => $data)

       Writes to storage the session identified by $id, together with its data $data, or dies if
       it can't.

       $dbh -> selectall_arrayref is used, and the table is not locked.

       Returns 1.

Method: traverse()

       Retrieves all ids from the sessions table, and for each id calls the supplied subroutine
       with the id as the only parameter.

       Returns 1.

Support

       Log a bug on RT: <https://rt.cpan.org/Public/Dist/Display.html?Name=Data-Session>.

Author

       Data::Session was written by Ron Savage <ron@savage.net.au> in 2010.

       Home page: <http://savage.net.au/index.html>.

Copyright

       Australian copyright (c) 2010, Ron Savage.

               All Programs of mine are 'OSI Certified Open Source Software';
               you can redistribute them and/or modify them under the terms of
               The Artistic License, a copy of which is available at:
               http://www.opensource.org/licenses/index.html