Class: Cosmos::InterfaceCmdHandlerThread

Inherits:
Object
  • Object
show all
Defined in:
lib/cosmos/microservices/interface_microservice.rb

Instance Method Summary collapse

Constructor Details

#initialize(interface, tlm, scope:) ⇒ InterfaceCmdHandlerThread

Returns a new instance of InterfaceCmdHandlerThread.



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# File 'lib/cosmos/microservices/interface_microservice.rb', line 33

def initialize(interface, tlm, scope:)
  @interface = interface
  @tlm = tlm
  @scope = scope
end

Instance Method Details

#graceful_kill ⇒ Object 



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# File 'lib/cosmos/microservices/interface_microservice.rb', line 52

def graceful_kill
  InterfaceTopic.shutdown(@interface, scope: @scope)
end

#run ⇒ Object 



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# File 'lib/cosmos/microservices/interface_microservice.rb', line 56

def run
  InterfaceTopic.receive_commands(@interface, scope: @scope) do |topic, msg_hash|
    # Check for a raw write to the interface
    if topic =~ /CMD}INTERFACE/
      if msg_hash['shutdown']
        Logger.info "#{@interface.name}: Shutdown requested"
        return
      end
      if msg_hash['connect']
        Logger.info "#{@interface.name}: Connect requested"
        @tlm.attempting()
        next 'SUCCESS'
      end
      if msg_hash['disconnect']
        Logger.info "#{@interface.name}: Disconnect requested"
        @tlm.disconnect(false)
        next 'SUCCESS'
      end
      if msg_hash['raw']
        Logger.info "#{@interface.name}: Write raw"
        # A raw interface write results in an UNKNOWN packet
        command = System.commands.packet('UNKNOWN', 'UNKNOWN')
        command.received_count += 1
        command = command.clone
        command.buffer = msg_hash['raw']
        command.received_time = Time.now
        CommandTopic.write_packet(command, scope: @scope)
        @interface.write_raw(msg_hash['raw'])
        next 'SUCCESS'
      end
      if msg_hash['inject_tlm']
        Logger.info "#{@interface.name}: Inject telemetry" if msg_hash['log']
        @tlm.inject_tlm(msg_hash)
        next 'SUCCESS'
      end
      if msg_hash.key?('log_raw')
        if msg_hash['log_raw'] == 'true'
          Logger.info "#{@interface.name}: Enable raw logging"
          @interface.start_raw_logging
        else
          Logger.info "#{@interface.name}: Disable raw logging"
          @interface.stop_raw_logging
        end
        next 'SUCCESS'
      end
    end

    target_name = msg_hash['target_name']
    cmd_name = msg_hash['cmd_name']
    cmd_params = nil
    cmd_buffer = nil
    hazardous_check = nil
    if msg_hash['cmd_params']
      cmd_params = JSON.parse(msg_hash['cmd_params'])
      range_check = ConfigParser.handle_true_false(msg_hash['range_check'])
      raw = ConfigParser.handle_true_false(msg_hash['raw'])
      hazardous_check = ConfigParser.handle_true_false(msg_hash['hazardous_check'])
    elsif msg_hash['cmd_buffer']
      cmd_buffer = msg_hash['cmd_buffer']
    end

    begin
      begin
        if cmd_params
          command = System.commands.build_cmd(target_name, cmd_name, cmd_params, range_check, raw)
        elsif cmd_buffer
          if target_name
            command = System.commands.identify(cmd_buffer, [target_name])
          else
            command = System.commands.identify(cmd_buffer, @target_names)
          end
          unless command
            command = System.commands.packet('UNKNOWN', 'UNKNOWN')
            command.received_count += 1
            command = command.clone
            command.buffer = cmd_buffer
          end
        else
          raise "Invalid command received:\n #{msg_hash}"
        end
        command.received_time = Time.now
      rescue => e
        Logger.error "#{@interface.name}: #{e.formatted}"
        next e.message
      end

      if hazardous_check
        hazardous, hazardous_description = System.commands.cmd_pkt_hazardous?(command)
        # Return back the error, description, and the formatted command
        # This allows the error handler to simply re-send the command
        # TODO: Should we set target_name, cmd_name, and cmd_params instead?
        next "HazardousError\n#{hazardous_description}\n#{System.commands.format(command)}" if hazardous
      end

      begin
        @interface.write(command)
        CommandTopic.write_packet(command, scope: @scope)
        CommandDecomTopic.write_packet(command, scope: @scope)
        InterfaceStatusModel.set(@interface.as_json, scope: @scope)
        next 'SUCCESS'
      rescue => e
        Logger.error "#{@interface.name}: #{e.formatted}"
        next e.message
      end
    rescue => e
      Logger.error "#{@interface.name}: #{e.formatted}"
      next e.message
    end
  end
end

#start ⇒ Object 



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# File 'lib/cosmos/microservices/interface_microservice.rb', line 39

def start
  @thread = Thread.new do
    run()
  rescue Exception => err
    Logger.error "#{@interface.name}: Command handler thread died: #{err.formatted}"
    raise err
  end
end

#stop ⇒ Object 



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# File 'lib/cosmos/microservices/interface_microservice.rb', line 48

def stop
  Cosmos.kill_thread(self, @thread)
end