Class: Soter::JobWorker

Inherits:
Object
  • Object
show all
Defined in:
lib/soter/job_worker.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ JobWorker

Returns a new instance of JobWorker.



16
17
18
19
20
21
22
 
# File 'lib/soter/job_worker.rb', line 16

def initialize
  @queue         = Soter.queue
  @log           = Soter.config.logger || File.open("#{logfile}", "a")

  @log.sync = true if @log.respond_to?(:sync=)
  @queue.cleanup! # remove expired locks
end

Instance Method Details

#perform ⇒ Object 



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
67
 
# File 'lib/soter/job_worker.rb', line 24

def perform
  process_id = Digest::MD5.
    hexdigest("#{Socket.gethostname}-#{Process.pid}-#{Thread.current}")

  log "#{process_id}: Spawning"

  while(job = @queue.lock_next(process_id))
    log "#{process_id}: Starting work on job #{job['_id']}"
    log "#{process_id}: Job info =>"

    job.each {
      |key, value| log  "#{process_id}: {#{key} : #{value}}" }

      begin
        handler_class = Soter.recursive_const_get(job['job']['class'])
        job_handler   = handler_class.new(job['job']['params'])

        job_handler.perform

        log "#{process_id}: " + job_handler.message

        if job_handler.success?
          @queue.complete(job, process_id)
          log "#{process_id}: Completed job #{job['_id']}"
        else
          offset           = Soter.retry_offset(job['attempts']+1)
          job['active_at'] = Time.now.utc + offset 
          @queue.error(job, job_handler.message)

          log "#{process_id}: Failed job #{job['_id']}"
        end

        sleep(1) if fork?
      rescue Exception => e
        @queue.complete(job, e.message)
        log "#{process_id}: Failed job #{job['_id']}" +
          " with error #{e.message}"
        log "#{process_id}: Backtrace =>"
        e.backtrace.each { |line| log "#{process_id}: #{line}"}
      end
  end #while
  log "#{process_id}: Harakiri"
  @log.close
end

#start ⇒ Object 



6
7
8
9
10
11
12
13
14
 
# File 'lib/soter/job_worker.rb', line 6

def start
  if fork?
    fork do
      perform
    end
  else
    perform
  end
end