Application Level Lock by MySQL with MoFedge. Tokuhiro Matsuno 2007-01-26(Fri) 社内勉強会

Bad Flow Validation Add Validation Add Session1 Session2 DB DOUBLE!

GET_LOCK/RELEASE_LOCK SELECT GET_LOCK(‘HOGE’, 10); 10 is timeout. SELECT RELEASE_LOCK(‘HOGE’);

SELECT GET_LOCK(‘HOGE’, 10);

10 is timeout.

SELECT RELEASE_LOCK(‘HOGE’);

Good Flow Validation Add Redirect Session1 Session2 DB Lock Lock another page

How to lock. use Mysql::NameLocker.

use Mysql::NameLocker.

Mysql::NameLocker use Mysql::NameLocker; sub valid_add { # GET_LOCK() $self->{locker} = Mysql::Namelocker->new( $self->model->store->dbh, $self->session->session_id, $self->config->lock_timeout, ); unless ($self->{locker}) { $self->validator->set_error(‘lock’ => ‘failed’); } }

use Mysql::NameLocker;

sub valid_add {

# GET_LOCK()

$self->{locker} = Mysql::Namelocker->new(

$self->model->store->dbh,

$self->session->session_id,

$self->config->lock_timeout,

);

unless ($self->{locker}) {

$self->validator->set_error(‘lock’ => ‘failed’);

}

}

Mysql::NameLocker (2) sub post_dispatch_add { # snip ... undef $self->{locker}; # RELEASE_LOCK() }

sub post_dispatch_add {

# snip ...

undef $self->{locker}; # RELEASE_LOCK()

}

SEE ALSO CVS Repository - markup - SourceForge: sledge/Sledge/lib/Sledge/Session/MySQL.pm http://cvs.sourceforge.jp/cgi-bin/viewcvs.cgi/sledge/Sledge/lib/Sledge/Session/MySQL.pm?view=markup

CVS Repository - markup - SourceForge: sledge/Sledge/lib/Sledge/Session/MySQL.pm

http://cvs.sourceforge.jp/cgi-bin/viewcvs.cgi/sledge/Sledge/lib/Sledge/Session/MySQL.pm?view=markup