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56 lines
1.4 KiB
56 lines
1.4 KiB
module Carto
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class UserDbSizeCache
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DB_SIZE_IN_BYTES_EXPIRATION = 2.days
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UPDATE_PROPAGATION_THRESHOLD = 8.hours
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BATCH_SIZE = 100
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def initialize(redis_cache = $users_metadata)
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@redis = redis_cache
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end
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def update_if_old(user)
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if last_updated(user) > UPDATE_PROPAGATION_THRESHOLD
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set_db_size_in_bytes(user)
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end
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end
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def db_size_in_bytes(user)
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@redis.get(db_size_in_bytes_key(user.username)).to_i
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end
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def db_size_in_bytes_change_users
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keys = @redis.scan_each(match: db_size_in_bytes_key('*')).to_a.uniq
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db_size_in_bytes_change_users = {}
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keys.each_slice(BATCH_SIZE) do |key_batch|
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usernames = key_batch.map { |key| extract_username_from_key(key) }
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db_size_in_bytes_change_users.merge!(Hash[usernames.zip(@redis.mget(key_batch).map(&:to_i))])
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end
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db_size_in_bytes_change_users
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end
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private
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def last_updated(user)
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DB_SIZE_IN_BYTES_EXPIRATION - @redis.ttl(db_size_in_bytes_key(user.username))
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end
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def set_db_size_in_bytes(user)
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@redis.setex(db_size_in_bytes_key(user.username), DB_SIZE_IN_BYTES_EXPIRATION.to_i, user.db_size_in_bytes)
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end
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def db_size_in_bytes_key(username)
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"rails:users:#{username}:db_size_in_bytes"
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end
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def extract_username_from_key(key)
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/#{db_size_in_bytes_key('(.*)')}/.match(key)[1]
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end
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end
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end
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