clear.rb

require 'net/telnet'

headings = %w(id expires bytes cache_key)
rows = []

localhost = Net::Telnet::new("Host" => "localhost", "Port" => 11211, "Timeout" => 3)
matches   = localhost.cmd("String" => "stats items", "Match" => /^END/).scan(/STAT items:(\d+):number (\d+)/)

slabs = matches.inject([]) { |items, item| items << Hash[*['id','items'].zip(item).flatten]; items }

longest_key_len = 0
slabs.each do |slab|
  localhost.cmd("String" => "stats cachedump #{slab['id']} #{slab['items']}", "Match" => /^END/) do |c|
    matches = c.scan(/^ITEM (.+?) \[(\d+) b; (\d+) s\]$/).each do |key_data|
      cache_key, bytes, expires_time = key_data
      if cache_key.starts_with?('search:')
        Rails.cache.delete(cache_key)
      end
    end
  end
end



# row_format = %Q(|%8s | %28s | %12s | %-#{longest_key_len}s |)
# puts row_format%headings
# rows.each{|row| puts row_format%row}


localhost.close