Class: Myreplicator::Log

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
app/models/myreplicator/log.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.clear_deads ⇒ Object

Clear all logs marked running that are not running



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# File 'app/models/myreplicator/log.rb', line 138

def self.clear_deads
  logs = Log.where(:state => "running")
  
  if logs.count > 0
    logs.each do |log|
      begin
        Process.getpgid(log.pid) if log.hostname == Socket.gethostname
      rescue Errno::ESRCH
        log.mark_dead
      end
    end
  end
  
end

.clear_stucks ⇒ Object

Clear all logs marked running that have run for more than 2 hours



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# File 'app/models/myreplicator/log.rb', line 109

def self.clear_stucks
  runnings = Log.where(:state => "running")
  news = Log.where(:state => "new")
  logs = runnings + news
  
  if logs.count > 0
    logs.each do |log|
      
      time_start = log.started_at
      now = Time.now()
      if time_start + 2.hour < now
        begin
          Process.kill('KILL', log.pid)
          log.state = "killed"
          log.save!
        rescue Errno::ESRCH
          log.state = "dead"
          log.save!
        end  
      end
    end
  end
  
end

.completed?(*args) ⇒ Boolean

Gets a jobtype, file and export_id returns true if the job is completed

Returns:

  • (Boolean) 


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# File 'app/models/myreplicator/log.rb', line 157

def self.completed? *args
  options = args.extract_options!
  log = Log.where(:export_id => options[:export_id],
                  :file => options[:file],
                  :job_type => options[:job_type]).last
  #Kernel.p "===== transport_complete? log ====="
  #Kernel.p log
  if log.nil?
    #return false
    # Bug: no log of tranporter job. Using return true for now
    return true
  else
    return true if log.state == "completed"
  end
  
  return false
end

.run(*args) ⇒ Object

Creates a log object Stores the state and related information about the job File’s names are supposed to be unique



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# File 'app/models/myreplicator/log.rb', line 22

def self.run *args
  options = args.extract_options!
  options.reverse_merge!(:started_at => Time.now,
                         :pid => Process.pid,
                         :hostname => Socket.gethostname,
                         :guid => SecureRandom.hex(5),
                         :thread_state => Thread.current.to_s,
                         :state => "new")

  log = Log.create options

  if  !log.running?
    begin
      log.state = "running"
      log.save!

      yield log

      log.state = "completed"
    rescue Exception => e
      log.state = "error"
      log.error = e.message
      log.backtrace =  e.backtrace

    ensure
      log.finished_at = Time.now
      log.save!
    end
  else
    begin
      log.state = "ignored"
    rescue Exception => e
      log.state = "error"
      log.error = e.message
      log.backtrace =  e.backtrace
    ensure
      log.finished_at = Time.now
      log.save!
    end
  end

end

Instance Method Details

#kill ⇒ Object

Kills the job if running Using PID



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# File 'app/models/myreplicator/log.rb', line 69

def kill
  return false unless hostname == Socket.gethostname
  begin
    Process.kill('KILL', pid)
    self.state = "killed"
    self.save!
  rescue Errno::ESRCH
    puts "pid #{pid} does not exist!"
    mark_dead
  end
end

#mark_dead ⇒ Object 



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# File 'app/models/myreplicator/log.rb', line 175

def mark_dead
  self.state = "dead"
  self.save!
end

#running? ⇒ Boolean

Checks to see if the PID of the log is active or not

Returns:

  • (Boolean) 


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# File 'app/models/myreplicator/log.rb', line 84

def running?
  logs = Log.where(:file => file, 
                   :job_type => job_type, 
                   :state => "running",
                   :export_id => export_id,
                   :hostname => hostname)
  
  if logs.count > 0
    logs.each do |log|
      begin
        Process.getpgid(log.pid)
        puts "still running #{log.file}"
        return true
      rescue Errno::ESRCH
        log.mark_dead
      end
    end
  end
  
  return false
end