Class: Dynflow::Middleware::Common::Singleton

Inherits:

Dynflow::Middleware

• Object
• Dynflow::Middleware
• Dynflow::Middleware::Common::Singleton

Defined in:

lib/dynflow/middleware/common/singleton.rb

Instance Method Summary

• #plan(*args) ⇒ Object

  Each action tries to acquire its own lock before the action’s #plan starts.

• #run(*args) ⇒ Object

  At the start of #run we try to acquire action’s lock unless it already holds it At the end the action tries to unlock its own lock if the execution plan has no finalize phase.

Methods inherited from Dynflow::Middleware

#action, #delay, #finalize, #finalize_phase, #hook, #initialize, #pass, #plan_phase, #present

Constructor Details

This class inherits a constructor from Dynflow::Middleware

Instance Method Details

#plan(*args) ⇒ Object

Each action tries to acquire its own lock before the action’s #plan starts

# File 'lib/dynflow/middleware/common/singleton.rb', line 7

def plan(*args)
  action.singleton_lock!
  pass(*args)
end

#run(*args) ⇒ Object

At the start of #run we try to acquire action’s lock unless it already holds it At the end the action tries to unlock its own lock if the execution plan has no

finalize phase

# File 'lib/dynflow/middleware/common/singleton.rb', line 15

def run(*args)
  action.singleton_lock! unless action.holds_singleton_lock?
  pass(*args)
end