# File lib/mongo/util/read_preference.rb, line 57 def select_secondary_pool(candidates, tag_sets, latency) tag_sets = [tag_sets] unless tag_sets.is_a?(Array) if !tag_sets.empty? matches = [] tag_sets.detect do |tag_set| matches = candidates.select do |candidate| tag_set.none? { |k,v| candidate.tags[k.to_s] != v } && candidate.ping_time end !matches.empty? end else matches = candidates end matches.empty? ? nil : select_near_pool(matches, latency) end