Use Flipper::Adapters::Poll to keep persisted features synced into memory. Polling happens in a background thread and loads all features into an in-memory adapter.

initializer.rb

require "flipper/adapters/dual_write"
require "flipper/adapters/poll"

Flipper.configure do |config|
  config.adapter do
    # Primary storage adapter
    storage_adapter = Flipper::Adapters::ActiveRecord.new

    # Poll the primary storage adapter every 10 seconds to get all features
    poller = Flipper::Adapters::Poll::Poller.get('memoizer', {
      interval: 5, # seconds
      remote_adapter: storage_adapter
    }).tap(&:start)
    
    # Perform initial sync from primary storage adapter
    poller.sync

    # Read from poller's memory adapter, write to both
    Flipper::Adapters::DualWrite.new(poller.adapter, storage_adapter)
  end
end

# Disable default memoization/preloading
Rails.application.configure do
  config.flipper.memoize = false
  config.flipper.preload = false
end