Class: Baykit::BayServer::Agent::CommandReceiver

Inherits:
Object
  • Object
show all
Includes:
Util
Defined in:
lib/baykit/bayserver/agent/command_receiver.rb

Overview

CommandReceiver receives commands from GrandAgentMonitor

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(agent, com_ch) ⇒ CommandReceiver

Returns a new instance of CommandReceiver.



16
17
18
19
20
 
# File 'lib/baykit/bayserver/agent/command_receiver.rb', line 16

def initialize(agent, com_ch)
  @agent = agent
  @communication_channel = com_ch
  @aborted = false
end

Instance Attribute Details

#aborted ⇒ Object (readonly)

Returns the value of attribute aborted.



14
15
16
 
# File 'lib/baykit/bayserver/agent/command_receiver.rb', line 14

def aborted
  @aborted
end

#agent ⇒ Object (readonly)

Returns the value of attribute agent.



12
13
14
 
# File 'lib/baykit/bayserver/agent/command_receiver.rb', line 12

def agent
  @agent
end

#communication_channel ⇒ Object (readonly)

Returns the value of attribute communication_channel.



13
14
15
 
# File 'lib/baykit/bayserver/agent/command_receiver.rb', line 13

def communication_channel
  @communication_channel
end

Instance Method Details

#close ⇒ Object 



68
69
70
 
# File 'lib/baykit/bayserver/agent/command_receiver.rb', line 68

def close()
  @communication_channel.close()
end

#end ⇒ Object 



58
59
60
61
62
63
64
65
66
 
# File 'lib/baykit/bayserver/agent/command_receiver.rb', line 58

def end()
  BayLog.debug("%s end", self)
  begin
    IOUtil.write_int32(@communication_channel, GrandAgent::CMD_CLOSE)
  rescue => e
    BayLog.error_e(e, "%s Write error", @agent);
  end
  close()
end

#on_pipe_readable ⇒ Object 



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
 
# File 'lib/baykit/bayserver/agent/command_receiver.rb', line 26

def on_pipe_readable()
  cmd = IOUtil.read_int32(@communication_channel)
  if cmd == nil
    BayLog.debug("%s pipe closed: %d", self, @communication_channel)
    @agent.abort_agent()
  else
    BayLog.debug("%s receive command %d pipe=%d", self, cmd, @communication_channel)
    begin
      case cmd
      when GrandAgent::CMD_RELOAD_CERT
        @agent.reload_cert()
      when GrandAgent::CMD_MEM_USAGE
        @agent.print_usage()
      when GrandAgent::CMD_SHUTDOWN
        @agent.shutdown()
        @aborted = true
      when GrandAgent::CMD_ABORT
        IOUtil.write_int32(@communication_channel, GrandAgent::CMD_OK)
        @agent.abort_agent()
        return
      else
        BayLog.error("Unknown command: %d", cmd)
      end
      IOUtil.write_int32(@communication_channel, GrandAgent::CMD_OK)
    rescue IOError => e
      BayLog.debug("%s Read failed (maybe agent shut down): %s", self, e)
    ensure
      BayLog.debug("%s Command ended", self)
    end
  end
end

#to_s ⇒ Object 



22
23
24
 
# File 'lib/baykit/bayserver/agent/command_receiver.rb', line 22

def to_s()
  return "ComReceiver##{@agent.agent_id}"
end