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Contents
# frozen_string_literal: true
module Deimos
module ActiveRecordConsume
# Helper class for breaking down batches into independent groups for
# processing
class BatchSlicer
# Split the batch into a series of independent slices. Each slice contains
# messages that can be processed in any order (i.e. they have distinct
# keys). Messages with the same key will be separated into different
# slices that maintain the correct order.
# E.g. Given messages A1, A2, B1, C1, C2, C3, they will be sliced as:
# [[A1, B1, C1], [A2, C2], [C3]]
# @param messages [Array<Message>]
# @return [Array<Array<Message>>]
def self.slice(messages)
ops = messages.group_by(&:key)
# Find maximum depth
depth = ops.values.map(&:length).max || 0
# Generate slices for each depth
depth.times.map do |i|
ops.values.map { |arr| arr.dig(i) }.compact
end
end
end
end
end
Version data entries
40 entries across 40 versions & 1 rubygems