Class: Baykit::BayServer::Agent::Signal::SignalAgent

Inherits:
Object
  • Object
show all
Includes:
Baykit::BayServer, Baykit::BayServer::Agent, Monitor, Baykit::BayServer::Agent::Signal, Bcf, Util
Defined in:
lib/baykit/bayserver/agent/signal/signal_agent.rb

Constant Summary collapse

COMMAND_RELOAD_CERT = 
"reloadcert"
COMMAND_MEM_USAGE = 
"memusage"
COMMAND_RESTART_AGENTS = 
"restartagents"
COMMAND_SHUTDOWN = 
"shutdown"
COMMAND_ABORT = 
"abort"

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.commands ⇒ Object (readonly)

Returns the value of attribute commands.



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# File 'lib/baykit/bayserver/agent/signal/signal_agent.rb', line 27

def commands
  @commands
end

.signal_agent ⇒ Object (readonly)

Returns the value of attribute signal_agent.



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# File 'lib/baykit/bayserver/agent/signal/signal_agent.rb', line 29

def signal_agent
  @signal_agent
end

.signal_map ⇒ Object (readonly)

Returns the value of attribute signal_map.



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# File 'lib/baykit/bayserver/agent/signal/signal_agent.rb', line 28

def signal_map
  @signal_map
end

Class Method Details

.get_signal_from_command(command) ⇒ Object 



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# File 'lib/baykit/bayserver/agent/signal/signal_agent.rb', line 78

def SignalAgent.get_signal_from_command(command)
  init_signal_map()
  @signal_map.keys().each do |sig|
    if(@signal_map[sig].casecmp?(command))
      return sig;
    end
  end
  return nil
end

.handle_command(cmd) ⇒ Object 



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# File 'lib/baykit/bayserver/agent/signal/signal_agent.rb', line 59

def SignalAgent.handle_command(cmd)
  BayLog.debug("handle command: %s", cmd)
  case (cmd.downcase)
  when COMMAND_RELOAD_CERT
    GrandAgentMonitor::reload_cert_all()
  when COMMAND_MEM_USAGE
    GrandAgentMonitor::print_usage_all()
  when COMMAND_RESTART_AGENTS
    GrandAgentMonitor::restart_all()
  when COMMAND_SHUTDOWN
    GrandAgentMonitor::shutdown_all()
  when COMMAND_ABORT
    GrandAgentMonitor::abort_all()
  else
    BayLog.error("Unknown command: %s", cmd)
  end
end

.init(bay_port) ⇒ Object

class methods



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# File 'lib/baykit/bayserver/agent/signal/signal_agent.rb', line 47

def SignalAgent.init(bay_port)
  @commands.each do |cmd|
    SignalProxy.register(get_signal_from_command(cmd)) do
      handle_command(cmd)
    end
  end

  if bay_port > 0
    run_signal_agent(bay_port)
  end
end

.init_signal_map ⇒ Object 



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# File 'lib/baykit/bayserver/agent/signal/signal_agent.rb', line 88

def SignalAgent.init_signal_map()
  if !@signal_map.empty?
    return;
  end

  if SysUtil.run_on_windows()
    # Available signals on Windows
    #    SIGABRT
    #    SIGFPE
    #    SIGILL
    #    SIGINT
    #    SIGSEGV
    #    SIGTERM
    @signal_map["SEGV"] = COMMAND_RELOAD_CERT
    @signal_map["ILL"] = COMMAND_MEM_USAGE
    @signal_map["INT"] = COMMAND_SHUTDOWN
    @signal_map["TERM"] = COMMAND_RESTART_AGENTS
    @signal_map["ABRT"] = COMMAND_ABORT

  else
    @signal_map["ALRM"] = COMMAND_RELOAD_CERT
    @signal_map["TRAP"] = COMMAND_MEM_USAGE
    @signal_map["HUP"] = COMMAND_RESTART_AGENTS
    @signal_map["TERM"] = COMMAND_SHUTDOWN
    @signal_map["ABRT"] = COMMAND_ABORT
  end
end

.run_signal_agent(port) ⇒ Object 



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# File 'lib/baykit/bayserver/agent/signal/signal_agent.rb', line 116

def self.run_signal_agent(port)
  Thread.new do
    server_skt = Socket.new(Socket::AF_INET, Socket::SOCK_STREAM, 0)
    server_skt.setsockopt(Socket::SOL_SOCKET,Socket::SO_REUSEADDR, true)
    adr = Socket.sockaddr_in(port, "127.0.0.1")
    server_skt.bind(adr)
    server_skt.listen(0)
    BayLog.info( BayMessage.get(:MSG_OPEN_CTL_PORT, @port))

    while true
      begin
        skt, = server_skt.accept
        skt.setsockopt(Socket::SOL_SOCKET, Socket::SO_RCVTIMEO, [5, 0].pack("l_2"))

        line = skt.readline.strip()
        BayLog.info(BayMessage.get(:MSG_COMMAND_RECEIVED, line))
        SignalAgent.handle_command(line)
        skt.write("OK\n")
        skt.flush

      rescue => e
        BayLog.error_e(e)

      ensure
        if skt
          skt.close()
        end
      end

    end
  end
end