Class: RailsPulse::ComponentCacheKey

Inherits:
Object
  • Object
show all
Defined in:
app/models/rails_pulse/component_cache_key.rb

Overview

Utility class for generating cache keys for cached components

Class Method Summary collapse

Class Method Details

.build(id, context = nil) ⇒ Object

Generate a cache key for a specific component type and context

The cache key includes several parts:

  • A namespace prefix to avoid collisions with other cached data

  • The context (like “routes” or “route_123”) to separate different views

  • The component type (like “average_response_times”) to separate different components

(Note: Time-based cache expiration is now handled via expires_in option)



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# File 'app/models/rails_pulse/component_cache_key.rb', line 11

def self.build(id, context = nil)
  [ "rails_pulse_component", id, context ].compact
end

.cache_expires_in ⇒ Object

Generate a cache expiration duration with jitter

This returns a duration that can be used with the expires_in option. We add some randomness (jitter) so all components don’t expire at exactly the same time, which would cause a “thundering herd” problem where all components recalculate simultaneously and overwhelm the database.



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# File 'app/models/rails_pulse/component_cache_key.rb', line 21

def self.cache_expires_in
  # Get the configured cache duration (e.g., 5 minutes)
  cache_duration = RailsPulse.configuration.component_cache_duration.to_i

  # Add up to 25% random jitter to spread out cache expirations
  max_jitter = (cache_duration * 0.25).to_i
  jitter = rand(max_jitter)

  # Return the base duration plus jitter
  cache_duration + jitter
end