Class: Taskinator::Persistence::LazyLoader

Inherits:
Delegator
  • Object
show all
Defined in:
lib/taskinator/persistence.rb

Overview

lazily loads the object specified by the type and uuid

Instance Method Summary collapse

Constructor Details

#initialize(type, uuid, instance_cache = {}) ⇒ LazyLoader

NOTE: the instance cached is passed from the first deserializer onto the next one, to prevent needing to keep loading the same objects again.

E.g. this is useful for tasks which refer to their parent processes



493
494
495
496
497
 
# File 'lib/taskinator/persistence.rb', line 493

def initialize(type, uuid, instance_cache={})
  @type = type
  @uuid = uuid
  @instance_cache = instance_cache
end

Instance Method Details

#__getobj__ ⇒ Object 



499
500
501
502
503
 
# File 'lib/taskinator/persistence.rb', line 499

def __getobj__
  # only fetch the object as needed
  # and memoize for subsequent calls
  @instance ||= @type.fetch(@uuid, @instance_cache)
end