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# encoding: UTF-8
require 'mauve/mauve_thread'
module Mauve
class Processor < MauveThread
include Singleton
attr_accessor :buffer, :transmission_cache_expire_time, :sleep_interval
def initialize
# Buffer for UDP socket packets.
@buffer = Queue.new
# Set the logger up
@logger = Log4r::Logger.new(self.class.to_s)
#
# Set up the transmission id cache
#
@transmission_id_cache = {}
@transmission_cache_expire_time = 300
@sleep_interval = 1
end
def main_loop
sz = @buffer.size
return if sz == 0
Timer.instance.freeze
logger.info("Buffer has #{sz} packets waiting...")
triplets = []
#
# Only do the loop a maximum of 10 times every @sleep_interval seconds
#
(sz > 20 ? 20 : sz).times do
triplets += @buffer.deq
end
triplets.each do |data, client, received_at|
@logger.debug("Got #{data.inspect} from #{client.inspect}")
ip_source = "#{client[3]}:#{client[1]}"
update = Proto::AlertUpdate.new
begin
update.parse_from_string(data)
if @transmission_id_cache[update.transmission_id.to_s]
@logger.debug("Ignoring duplicate transmission id #{data.transmission_id}")
#
# Continue with next packet.
#
next
end
@logger.debug "Update #{update.transmission_id} sent at #{update.transmission_time} from "+
"'#{update.source}'@#{ip_source} alerts #{update.alert.length}"
Alert.receive_update(update, received_at)
rescue Protobuf::InvalidWireType,
NotImplementedError,
DataObjects::IntegrityError => ex
@logger.error "#{ex} (#{ex.class}) while parsing #{data.length} bytes "+
"starting '#{data[0..16].inspect}' from #{ip_source}"
@logger.debug ex.backtrace.join("\n")
ensure
@transmission_id_cache[update.transmission_id.to_s] = MauveTime.now
end
end
Timer.instance.thaw
end
def expire_transmission_id_cache
now = MauveTime.now
to_delete = []
@transmission_id_cache.each do |tid, received_at|
to_delete << tid if (now - received_at) > @transmission_cache_expire_time
end
to_delete.each do |tid|
@transmission_id_cache.delete(tid)
end
end
class << self
def enq(a)
instance.buffer.enq(a)
end
alias push enq
end
end
end
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