42 lines
997 B
Ruby
42 lines
997 B
Ruby
# frozen_string_literal: true
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module StatsCacheable
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extend ActiveSupport::Concern
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module ClassMethods
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def stats_cache_key
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raise 'Stats cache key has not been set.'
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end
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def fetch_stats
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raise 'Not implemented.'
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end
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# Could be configurable, multisite need to support it.
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def recalculate_stats_interval
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30 # minutes
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end
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def fetch_cached_stats
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# The scheduled Stats job is responsible for generating and caching this.
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stats = $redis.get(stats_cache_key)
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stats = refresh_stats if !stats
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JSON.parse(stats).with_indifferent_access
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end
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def refresh_stats
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stats = fetch_stats.to_json
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set_cache(stats)
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stats
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end
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private
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def set_cache(stats)
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# Add some extra time to the expiry so that the next job run has plenty of time to
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# finish before previous cached value expires.
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$redis.setex stats_cache_key, (recalculate_stats_interval + 5).minutes, stats
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end
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end
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end
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