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|
# encoding: UTF-8
require 'yaml'
require 'socket'
# require 'mauve/datamapper'
require 'mauve/proto'
require 'mauve/alert'
require 'mauve/history'
require 'mauve/mauve_thread'
require 'mauve/mauve_time'
require 'mauve/timer'
require 'mauve/udp_server'
require 'mauve/processor'
require 'mauve/http_server'
require 'log4r'
module Mauve
class Server
DEFAULT_CONFIGURATION = {
:ip => "127.0.0.1",
:port => 32741,
:database => "sqlite3:///./mauvealert.db",
:log_file => "stdout",
:log_level => 1,
:transmission_cache_expire_time => 600
}
#
# This is the order in which the threads should be started.
#
THREAD_CLASSES = [UDPServer, HTTPServer, Processor, Timer, Notifier]
attr_accessor :web_interface
attr_reader :stopped_at, :started_at, :initial_sleep, :packet_buffer, :notification_buffer
include Singleton
def initialize
# Set the logger up
# Sleep time between pooling the @buffer buffer.
@sleep = 1
@frozen = false
@stop = false
@stopped_at = MauveTime.now
@started_at = MauveTime.now
@initial_sleep = 300
#
# Keep these queues here to prevent a crash in a subthread losing all the
# subsquent things in the queue.
#
@packet_buffer = []
@notification_buffer = []
@config = DEFAULT_CONFIGURATION
end
def logger
@logger ||= Log4r::Logger.new(self.class.to_s)
end
def configure(config_spec = nil)
#
# Update the configuration
#
if config_spec.nil?
# Do nothing
elsif config_spec.kind_of?(String) and File.exists?(config_spec)
@config.update(YAML.load_file(config_spec))
elsif config_spec.kind_of?(Hash)
@config.update(config_spec)
else
raise ArgumentError.new("Unknown configuration spec "+config_spec.inspect)
end
#
DataMapper.setup(:default, @config[:database])
# DataObjects::Sqlite3.logger = Log4r::Logger.new("Mauve::DataMapper")
#
# Update any tables.
#
Alert.auto_upgrade!
AlertChanged.auto_upgrade!
History.auto_upgrade!
Mauve::AlertEarliestDate.create_view!
#
# Work out when the server was last stopped
#
# topped_at = self.last_heartbeat
end
def last_heartbeat
#
# Work out when the last update was
#
[ Alert.last(:order => :updated_at.asc),
AlertChanged.last(:order => :updated_at.asc) ].
reject{|a| a.nil? or a.updated_at.nil? }.
collect{|a| a.updated_at.to_time}.
sort.
last
end
def freeze
@frozen = true
end
def thaw
@thaw = true
end
def stop
if @stop
logger.debug("Stop already called!")
return
end
@stop = true
thread_list = Thread.list
thread_list.delete(Thread.current)
THREAD_CLASSES.each do |klass|
thread_list.delete(klass.instance)
klass.instance.stop unless klass.instance.nil?
end
thread_list.each do |t|
t.exit
end
logger.info("All threads stopped")
end
def run
@stop = false
loop do
thread_list = Thread.list
thread_list.delete(Thread.current)
THREAD_CLASSES.each do |klass|
#
# No need to double check ourselves.
#
thread_list.delete(klass.instance.thread)
#
# Do nothing if we're frozen or supposed to be stopping or still alive!
#
next if @frozen or @stop or klass.instance.alive?
#
# ugh something is beginnging to smell.
#
begin
klass.instance.join
rescue StandardError => ex
logger.error "Caught #{ex.to_s} whilst checking #{klass} thread"
logger.debug ex.backtrace.join("\n")
end
#
# (re-)start the klass.
#
klass.instance.start unless @stop
end
#
# Now do the same with other threads. However if these ones crash, the
# server has to stop, as there is no method to restart them.
#
thread_list.each do |t|
next if t.alive?
begin
t.join
rescue StandardError => ex
logger.fatal "Caught #{ex.to_s} whilst checking threads"
logger.debug ex.backtrace.join("\n")
self.stop
break
end
end
break if @stop
sleep 1
end
logger.debug("Thread stopped")
end
alias start run
class << self
#
# BUFFERS
#
# These methods are here, so that if the threads that are popping and
# processing them crash, the buffer itself is not lost with the thread.
#
#
# These methods pop things on and off the packet_buffer
#
def packet_enq(a)
instance.packet_buffer.push(a)
end
def packet_deq
instance.packet_buffer.shift
end
def packet_buffer_size
instance.packet_buffer.size
end
alias packet_push packet_enq
alias packet_pop packet_deq
#
# These methods pop things on and off the notification_buffer
#
def notification_enq(a)
instance.notification_buffer.push(a)
end
def notification_deq
instance.notification_buffer.shift
end
def notification_buffer_size
instance.notification_buffer.size
end
alias notification_push notification_enq
alias notification_pop notification_deq
end
end
end
|
