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# frozen_string_literal: true
class Analytics::CycleAnalytics::Aggregation < ApplicationRecord
include FromUnion
belongs_to :group, optional: false
validates :incremental_runtimes_in_seconds, :incremental_processed_records, :last_full_run_runtimes_in_seconds, :last_full_run_processed_records, presence: true, length: { maximum: 10 }, allow_blank: true
scope :priority_order, -> (column_to_sort = :last_incremental_run_at) { order(arel_table[column_to_sort].asc.nulls_first) }
scope :enabled, -> { where('enabled IS TRUE') }
def estimated_next_run_at
return unless enabled
return if last_incremental_run_at.nil?
estimation = duration_until_the_next_aggregation_job +
average_aggregation_duration +
(last_incremental_run_at - earliest_last_run_at)
estimation < 1 ? nil : estimation.from_now
end
def self.safe_create_for_group(group)
top_level_group = group.root_ancestor
aggregation = find_by(group_id: top_level_group.id)
return aggregation if aggregation.present?
insert({ group_id: top_level_group.id }, unique_by: :group_id)
find_by(group_id: top_level_group.id)
end
private
# The aggregation job is scheduled every 10 minutes: */10 * * * *
def duration_until_the_next_aggregation_job
(10 - (DateTime.current.minute % 10)).minutes.seconds
end
def average_aggregation_duration
return 0.seconds if incremental_runtimes_in_seconds.empty?
average = incremental_runtimes_in_seconds.sum.fdiv(incremental_runtimes_in_seconds.size)
average.seconds
end
def earliest_last_run_at
max = self.class.select(:last_incremental_run_at)
.where(enabled: true)
.where.not(last_incremental_run_at: nil)
.priority_order
.limit(1)
.to_sql
connection.select_value("(#{max})")
end
def self.load_batch(last_run_at, column_to_query = :last_incremental_run_at, batch_size = 100)
last_run_at_not_set = Analytics::CycleAnalytics::Aggregation
.enabled
.where(column_to_query => nil)
.priority_order(column_to_query)
.limit(batch_size)
last_run_at_before = Analytics::CycleAnalytics::Aggregation
.enabled
.where(arel_table[column_to_query].lt(last_run_at))
.priority_order(column_to_query)
.limit(batch_size)
Analytics::CycleAnalytics::Aggregation
.from_union([last_run_at_not_set, last_run_at_before], remove_order: false, remove_duplicates: false)
.limit(batch_size)
end
end
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