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30990006a9
This reduces chances of errors where consumers of strings mutate inputs and reduces memory usage of the app. Test suite passes now, but there may be some stuff left, so we will run a few sites on a branch prior to merging
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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