Class: BigWig::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/bigwig/runner.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(command_line_options) ⇒ Runner

start the bigwig process use a default config file of bigwig.yml in the current folder, unless one is provided on the command line



16
17
18
 
# File 'lib/bigwig/runner.rb', line 16

def initialize(command_line_options)
  load_options_from command_line_options
end

Instance Attribute Details

#args ⇒ Object (readonly)

Returns the value of attribute args.



10
11
12
 
# File 'lib/bigwig/runner.rb', line 10

def args
  @args
end

#config ⇒ Object (readonly)

Returns the value of attribute config.



12
13
14
 
# File 'lib/bigwig/runner.rb', line 12

def config
  @config
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



11
12
13
 
# File 'lib/bigwig/runner.rb', line 11

def options
  @options
end

Instance Method Details

#run ⇒ Object 



20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
 
# File 'lib/bigwig/runner.rb', line 20

def run
  Daemons.run_proc('bigwig', :dir => @options.log_folder, :dir_mode => :normal, :log_output => true,  :ARGV => self.args) do |*args|
    @config = YAML.load(File.open(@options.config))
    load_plugins_from @config["plugins_folder"]
    load_init_scripts_from @config["init_folder"]
    begin
      BigWig::logger.info("Starting Bigwig job worker")

      trap_signals
      BigWig::connect_using config

      last_successful_subscription = Time.now
      last_connection_failed = false
      loop do
        message_received = false
        break if $exit 

        begin
          Warren::Queue.subscribe(:default) do |msg|
            BigWig::Job.dispatch(msg)
            message_received = true
          end
          
          last_successful_subscription = Time.now # record the time in case we have a failure next time round
          if last_connection_failed
            BigWig.logger.info('...reconnected successfully')
            last_connection_failed = false
          end
          sleep(0.5) unless message_received # if the queue was empty, go to sleep before checking for the next message
          
        rescue Exception => ex # if there was an error connecting to the queue, wait a bit and then retry TODO: Change this exception
          BigWig::logger.error("Error when subscribing to the queue: #{ex}")
          retry_time = calculate_retry_time_based_upon last_successful_subscription
          sleep(retry_time)
          last_connection_failed = true
        end
        
        break if $exit
      end

      BigWig::logger.info("Bigwig job worker stopped")
    rescue => e
      BigWig::logger.fatal("Exiting due to exception #{e}, #{e.message}")
      exit 1
    end
  end
end