Module: Glue::Locking

Defined in:
lib/glue/optimistic_locking.rb

Overview

Include this module into entity classes to provide optimistic locking suport. For more information on optimistic locking please consult:

c2.com/cgi/wiki?OptimisticLocking en.wikipedia.org/wiki/Optimistic_concurrency_control

Instance Method Summary collapse

Instance Method Details

#save_with_lock ⇒ Object 



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# File 'lib/glue/optimistic_locking.rb', line 42

def save_with_lock
  lock = @lock_version
  @lock_version += 1

  unless save_without_lock(:condition => "lock_version=#{lock}") == 1  
    raise(StaleObjectError, 'Attempted to update a stale object')
  end
end

#update_with_lock ⇒ Object 



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# File 'lib/glue/optimistic_locking.rb', line 33

def update_with_lock
  lock = @lock_version
  @lock_version += 1

  unless update_without_lock(:condition => "lock_version=#{lock}") == 1  
    raise(StaleObjectError, 'Attempted to update a stale object')
  end
end