Class: InstanceAgent::Runner::Master

Inherits:
ProcessManager::Daemon::Master
  • Object
show all
Defined in:
lib/instance_agent/runner/master.rb

Constant Summary collapse

ChildTerminationMaxWaitTime = 
80

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.child_class ⇒ Object 



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# File 'lib/instance_agent/runner/master.rb', line 15

def self.child_class
  ::InstanceAgent::Runner::Child
end

.description(pid = $$) ⇒ Object 



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# File 'lib/instance_agent/runner/master.rb', line 11

def self.description(pid = $$)
  "master #{pid}"
end

.log_file ⇒ Object 



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# File 'lib/instance_agent/runner/master.rb', line 23

def self.log_file
  File.join(ProcessManager::Config.config[:log_dir], "#{ProcessManager::Config.config[:program_name]}.log")
end

.pid_description ⇒ Object 



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# File 'lib/instance_agent/runner/master.rb', line 19

def self.pid_description
  ProcessManager::Config.config[:program_name]
end

.pid_file ⇒ Object 



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# File 'lib/instance_agent/runner/master.rb', line 27

def self.pid_file
  File.join(ProcessManager::Config.config[:pid_dir], "#{ProcessManager::Config.config[:program_name]}.pid")
end

Instance Method Details

#kill_children(sig) ⇒ Object 



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# File 'lib/instance_agent/runner/master.rb', line 60

def kill_children(sig)
	    children.each do |index, child_pid|
    begin
      Process.kill(sig, child_pid)
    rescue Errno::ESRCH
    end
  end
    
  begin
    Timeout.timeout(ChildTerminationMaxWaitTime) do
      children.each do |index, child_pid|
        begin
          Process.wait(child_pid)
        rescue Errno::ESRCH
        end
      end
    end
  rescue Timeout::Error
    children.each do |index, child_pid|
      if ProcessManager.process_running?(child_pid)
        puts "Stopping #{ProcessManager::Config.config[:program_name]} agent(#{pid}) but child(#{child_pid}) still processing."
        ProcessManager::Log.warn("Stopping #{ProcessManager::Config.config[:program_name]} agent(#{pid}) but child(#{child_pid}) is still processing.")
      end
    end
  end

end

#stop ⇒ Object 



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# File 'lib/instance_agent/runner/master.rb', line 31

def stop
  if (pid = self.class.find_pid)
    puts "Stopping #{description(pid)}"
    ProcessManager::Log.info("Stopping #{description(pid)}")
    begin
      Process.kill('TERM', pid)
    rescue Errno::ESRCH
    end
    
    begin
      Timeout.timeout(ChildTerminationMaxWaitTime) do  
        loop do
          begin
            Process.kill(0, pid)
            sleep(1)
          rescue Errno::ESRCH
            break
          end
        end
      end
    rescue Timeout::Error
      puts "Child processes still running. Master going down."
      ProcessManager::Log.warn("Master process (#{pid}) going down before terminating child")
    end
  else
    puts "Nothing running that could be stopped"
  end
end