Class: EventMachine::DnsCache::MxQuery

Inherits:
Object
  • Object
show all
Includes:
EM::Deferrable
Defined in:
lib/em/dns_cache.rb

Instance Method Summary collapse

Constructor Details

#initialize(rslt) ⇒ MxQuery

Returns a new instance of MxQuery.



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# File 'lib/em/dns_cache.rb', line 212

def initialize rslt
	@result = rslt # Deferrable
	@n_a_lookups = 0

	self.callback {|resp|
		addrs = {}
		resp.each_additional {|name,ttl,data|
			addrs.has_key?(name) ? (addrs[name] << data.address.to_s) : (addrs[name] = [data.address.to_s])
		}

		@addresses = resp.answer.
		sort {|a,b| a[2].preference <=> b[2].preference}.
		map {|name,ttl,data|
			ex = data.exchange
			addrs[ex] or EM::DnsCache.resolve(ex.to_s)
		}

		@addresses.each_with_index {|a,ix|
			if a.respond_to?(:set_deferred_status)
				@n_a_lookups += 1
				a.callback {|r|
					@addresses[ix] = r
					@n_a_lookups -= 1
					succeed_result if @n_a_lookups == 0
				}
			end
		}

		succeed_result if @n_a_lookups == 0
	}
end

Instance Method Details

#succeed_result ⇒ Object 



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# File 'lib/em/dns_cache.rb', line 244

def succeed_result
	# Questionable whether we should uniq if it perturbs the sort order.
	# Also freeze it so some user can't wipe it out on us.
	@result.succeed @addresses.flatten.uniq.freeze
end