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#-*- perl -*-
#
# Copyright (C) 2000,2001 Ken'ichi Fukamachi
# All rights reserved.
#
# $FML$
#
package IO::Adapter::MySQL;
use strict;
use vars qw(@ISA @EXPORT @EXPORT_OK $AUTOLOAD);
use Carp;
use IO::Adapter::DBI;
@ISA = qw(IO::Adapter::DBI);
=head1 NAME
IO::Adapter::MySQL - interface to talk with a MySQL server
=head1 SYNOPSIS
use IO::Adapter;
my $map = 'mysql:toymodel';
my $map_params = {
$map => {
sql_server => 'localhost',
user => 'fukachan',
user_password => 'uja',
database => 'fml',
table => 'ml',
params => {
ml_name => 'elena',
file => 'members',
},
},
};
my $obj = new IO::Adapter ($map, $map_params);
$obj->open();
$obj->add( 'rudo@nuinui.net' );
$obj->close();
=head1 DESCRIPTION
This module is a top level driver to talk with a MySQL server in SQL
(Structured Query Language).
The model dependent SQL statement is expected to be holded in
C<SQL::Schema::> modules.
You can specify your own module name at $args->{ driver } in
new($args).
It is expected to provdie C<add()>, C<delete()> and
C<get_next_value()> method.
=head1 METHODS
=head2 C<configure($me, $args)>
IO::Adapter::MySQL specific configuration loader.
It also calles SQL::Schema::$model module for model specific
customizatoins and functions.
=cut
sub configure
{
my ($self, $me, $args) = @_;
my $map = $me->{ _map }; # e.g. "mysql:toymodel"
my $config = $args->{ $map }; # { add => 'insert into ..', }
my $params = $config->{ params }; #
# import basic DBMS parameters
$me->{ _config } = $config;
$me->{ _params } = $params;
$me->{ _sql_server } = $config->{ sql_server } || 'localhost';
$me->{ _database } = $config->{ database } || 'fml';
$me->{ _table } = $config->{ table } || 'ml';
$me->{ _user } = $config->{ user } || 'fml';
$me->{ _user_password } = $config->{ user_password } || '';
$me->{_dsn} = $self->SUPER::make_dsn( {
driver => 'mysql',
database => $me->{ _database },
host => $me->{ _sql_server },
});
# load model specific library
my $pkg = $config->{ driver } || 'SQL::Schema::toymodel';
eval qq{ require $pkg; $pkg->import();};
# $self->{ _driver } is the $config->{ driver } object.
unless ($@) {
print STDERR "load $pkg\n" if $ENV{ 'debug ' };
@ISA = ($pkg, @ISA);
$me->{ _driver } = $pkg;
}
else {
error_set($self, $@);
return undef;
}
}
=head2 C<getline()>
return the next address.
=head2 C<get_next_value()>
same as C<getline()> now.
=cut
sub getline
{
my ($self, $args) = @_;
$self->get_next_value($args);
}
sub get_next_value
{
my ($self, $args) = @_;
# for the first time
unless ($self->{ _res }) {
# $self->{ _driver } is the $config->{ driver } object.
if ( $self->{ _driver }->can('get_next_value') ) {
$self->{ _driver }->get_next_value($args);
}
else {
my $query = $self->build_sql_query({
query => 'get_next_value',
});
$self->execute({ query => $query });
}
}
if ($self->{ _res }) {
my @row = $self->{ _res }->fetchrow_array;
join(" ", @row);
}
else {
$self->error_set( $DBI::errstr );
undef;
}
}
=head2 C<add($addr)>
add C<$addr> to the sql server specified at new().
SQL::Schema::$model provides model specific SQL query statement.
If SQL::Schema::add() exists, SQL::Schema::add() is called.
=head2 C<delete($addr)>
delete C<$addr> from the sql server specified at new().
SQL::Schema::$model provides model specific SQL query statement.
If SQL::Schema::delete() exists, SQL::Schema::delete() is called.
=cut
sub add
{
my ($self, $addr) = @_;
# $self->{ _driver } is the $config->{ driver } object.
if ( $self->{ _driver }->can('add') ) {
$self->{ _driver }->add($addr);
}
else {
my $query = $self->build_sql_query({
query => 'add',
address => $addr,
});
$self->execute({ query => $query });
}
}
sub delete
{
my ($self, $addr) = @_;
# $self->{ _driver } is the $config->{ driver } object.
if ( $self->{ _driver }->can('delete') ) {
$self->{ _driver }->delete($addr);
}
else {
my $query = $self->build_sql_query({
query => 'delete',
address => $addr,
});
$self->execute({ query => $query });
}
}
=head1 SEE ALSO
L<DBI>,
L<DBD::MySQL>,
L<IO::Adapter::DBI>
=head1 AUTHOR
Ken'ichi Fukamachi
=head1 COPYRIGHT
Copyright (C) 2001 Ken'ichi Fukamachi
All rights reserved. This program is free software; you can
redistribute it and/or modify it under the same terms as Perl itself.
=head1 HISTORY
IO::Adapter::File appeared in fml5 mailing list driver package.
See C<http://www.fml.org/> for more details.
=cut
1;
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