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require 'socket'
include Socket::Constants
module God
module Conditions
# Condition Symbol :socket_running
# Type: Poll
#
# Trigger when a TCP or UNIX socket is running or not
#
# Parameters
# Required
# +family+ is the family of socket: either 'tcp' or 'unix'
# --one of port or path--
# +port+ is the port (required if +family+ is 'tcp')
# +path+ is the path (required if +family+ is 'unix')
#
# Optional
# +responding+ is the boolean specifying whether you want to trigger if the socket is responding (true)
# or if it is not responding (false) (default false)
#
# Examples
#
# Trigger if the TCP socket on port 80 is not responding or the connection is refused
#
# on.condition(:socket_responding) do |c|
# c.family = 'tcp'
# c.port = '80'
# end
#
# Trigger if the socket is not responding or the connection is refused (use alternate compact +socket+ interface)
#
# on.condition(:socket_responding) do |c|
# c.socket = 'tcp:80'
# end
#
# Trigger if the socket is responding
#
# on.condition(:socket_responding) do |c|
# c.socket = 'tcp:80'
# c.responding = true
# end
#
# Trigger if the socket is not responding or the connection is refused 5 times in a row
#
# on.condition(:socket_responding) do |c|
# c.socket = 'tcp:80'
# c.times = 5
# end
#
# Trigger if the Unix socket on path '/tmp/sock' is not responding or non-existent
#
# on.condition(:socket_responding) do |c|
# c.family = 'unix'
# c.port = '/tmp/sock'
# end
#
class SocketResponding < PollCondition
attr_accessor :family, :addr, :port, :path, :times, :responding
def initialize
super
# default to tcp on the localhost
self.family = 'tcp'
self.addr = '127.0.0.1'
# Set these to nil/0 values
self.port = 0
self.path = nil
self.responding = false
self.times = [1, 1]
end
def prepare
if self.times.kind_of?(Integer)
self.times = [self.times, self.times]
end
@timeline = Timeline.new(self.times[1])
@history = Timeline.new(self.times[1])
end
def reset
@timeline.clear
@history.clear
end
def socket=(s)
components = s.split(':')
if components.size == 3
@family,@addr,@port = components
@port = @port.to_i
elsif components[0] =~ /^tcp$/
@family = components[0]
@port = components[1].to_i
elsif components[0] =~ /^unix$/
@family = components[0]
@path = components[1]
end
end
def valid?
valid = true
if self.family == 'tcp' and @port == 0
valid &= complain("Attribute 'port' must be specified for tcp sockets", self)
end
if self.family == 'unix' and self.path.nil?
valid &= complain("Attribute 'path' must be specified for unix sockets", self)
end
valid = false unless %w{tcp unix}.member?(self.family)
valid
end
def test
self.info = []
if self.family == 'tcp'
begin
s = TCPSocket.new(self.addr, self.port)
rescue SystemCallError
end
status = self.responding == !s.nil?
elsif self.family == 'unix'
begin
s = UNIXSocket.new(self.path)
rescue SystemCallError
end
status = self.responding == !s.nil?
else
status = false
end
@timeline.push(status)
history = "[" + @timeline.map {|t| t ? '*' : ''}.join(',') + "]"
if @timeline.select { |x| x }.size >= self.times.first
self.info = "socket out of bounds #{history}"
return true
else
return false
end
end
end
end
end
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