Class: UserPattern::ThresholdCache

Inherits:
Object
  • Object
show all
Defined in:
lib/userpattern/threshold_cache.rb

Overview

Periodically loads observed max frequencies from the DB and builds an in-memory lookup of limits (max * multiplier) per (model_type, endpoint).

A Hash is used rather than a Set because we need associated limit values per key — Hash#key? is already O(1), same as Set#include?.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ThresholdCache

Returns a new instance of ThresholdCache.



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# File 'lib/userpattern/threshold_cache.rb', line 13

def initialize
  @limits = {}
  @mutex = Mutex.new
  safe_refresh
  start_refresh_timer
end

Instance Method Details

#all_limits ⇒ Object 



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# File 'lib/userpattern/threshold_cache.rb', line 28

def all_limits
  @limits.dup
end

#known_endpoint?(model_type, endpoint) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/userpattern/threshold_cache.rb', line 24

def known_endpoint?(model_type, endpoint)
  @limits.key?([model_type, endpoint])
end

#limits_for(model_type, endpoint) ⇒ Object 



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# File 'lib/userpattern/threshold_cache.rb', line 20

def limits_for(model_type, endpoint)
  @limits[[model_type, endpoint]]
end

#refresh! ⇒ Object 



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# File 'lib/userpattern/threshold_cache.rb', line 32

def refresh!
  new_limits = build_limits
  @mutex.synchronize { @limits = new_limits }
end

#shutdown ⇒ Object 



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# File 'lib/userpattern/threshold_cache.rb', line 37

def shutdown
  @timer&.shutdown
end