Class: OpenC3::DecomMicroservice

Inherits:
Microservice show all
Includes:
InterfaceDecomCommon
Defined in:
lib/openc3/microservices/decom_microservice.rb

Instance Attribute Summary

Attributes inherited from Microservice

#count, #custom, #error, #logger, #microservice_status_thread, #name, #scope, #secrets, #state

Instance Method Summary collapse

Methods included from InterfaceDecomCommon

#handle_build_cmd, #handle_inject_tlm

Methods inherited from Microservice

#as_json, #microservice_cmd, run, #setup_microservice_topic, #shutdown

Constructor Details

#initialize(*args) ⇒ DecomMicroservice

Returns a new instance of DecomMicroservice.



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# File 'lib/openc3/microservices/decom_microservice.rb', line 32

def initialize(*args)
  super(*args)
  # Should only be one target, but there might be multiple decom microservices for a given target
  # First Decom microservice has no number in the name
  if @name =~ /__DECOM__/
    @topics << "#{@scope}__DECOMINTERFACE__{#{@target_names[0]}}"
  end
  Topic.update_topic_offsets(@topics)
  System.telemetry.limits_change_callback = method(:limits_change_callback)
  LimitsEventTopic.sync_system(scope: @scope)
  @error_count = 0
  @metric.set(name: 'decom_total', value: @count, type: 'counter')
  @metric.set(name: 'decom_error_total', value: @error_count, type: 'counter')
end

Instance Method Details

#decom_packet(_topic, msg_id, msg_hash, _redis) ⇒ Object 



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# File 'lib/openc3/microservices/decom_microservice.rb', line 84

def decom_packet(_topic, msg_id, msg_hash, _redis)
  OpenC3.in_span("decom_packet") do
    msgid_seconds_from_epoch = msg_id.split('-')[0].to_i / 1000.0
    delta = Time.now.to_f - msgid_seconds_from_epoch
    @metric.set(name: 'decom_topic_delta_seconds', value: delta, type: 'gauge', unit: 'seconds', help: 'Delta time between data written to stream and decom start')

    start = Process.clock_gettime(Process::CLOCK_MONOTONIC)
    target_name = msg_hash["target_name"]
    packet_name = msg_hash["packet_name"]

    packet = System.telemetry.packet(target_name, packet_name)
    packet.stored = ConfigParser.handle_true_false(msg_hash["stored"])
    # Note: Packet time will be recalculated as part of decom so not setting
    packet.received_time = Time.from_nsec_from_epoch(msg_hash["received_time"].to_i)
    packet.received_count = msg_hash["received_count"].to_i
    extra = msg_hash["extra"]
    if extra and extra.length > 0
      extra = JSON.parse(extra, allow_nan: true, create_additions: true)
      packet.extra = extra
    end
    packet.buffer = msg_hash["buffer"]
    # Processors are user code points which must be rescued
    # so the TelemetryDecomTopic can write the packet
    begin
      packet.process # Run processors
    rescue Exception => e
      @error_count += 1
      @metric.set(name: 'decom_error_total', value: @error_count, type: 'counter')
      @error = e
      @logger.error e.message
    end
    # Process all the limits and call the limits_change_callback (as necessary)
    # check_limits also can call user code in the limits response
    # but that is rescued separately in the limits_change_callback
    packet.check_limits(System.limits_set)

    # This is what updates the CVT
    TelemetryDecomTopic.write_packet(packet, scope: @scope)
    diff = Process.clock_gettime(Process::CLOCK_MONOTONIC) - start # seconds as a float
    @metric.set(name: 'decom_duration_seconds', value: diff, type: 'gauge', unit: 'seconds')
  end
end

#limits_change_callback(packet, item, old_limits_state, value, log_change) ⇒ Object

Called when an item in any packet changes limits states.

Parameters:

  • packet (Packet) —

    Packet which has had an item change limits state

  • item (PacketItem) —

    The item which has changed limits state

  • old_limits_state (Symbol) —

    The previous state of the item. See PacketItemLimits#state

  • value (Object) —

    The current value of the item

  • log_change (Boolean) —

    Whether to log this limits change event



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# File 'lib/openc3/microservices/decom_microservice.rb', line 135

def limits_change_callback(packet, item, old_limits_state, value, log_change)
  return if @cancel_thread
  packet_time = packet.packet_time
  if value
    message = "#{packet.target_name} #{packet.packet_name} #{item.name} = #{value} is #{item.limits.state}"
  else
    message = "#{packet.target_name} #{packet.packet_name} #{item.name} is disabled"
  end
  message << " (#{packet.packet_time.sys.formatted})" if packet_time

  time_nsec = packet_time ? packet_time.to_nsec_from_epoch : Time.now.to_nsec_from_epoch
  if log_change
    case item.limits.state
    when :BLUE, :GREEN, :GREEN_LOW, :GREEN_HIGH
      # Only print INFO messages if we're changing ... not on initialization
      @logger.info message if old_limits_state
    when :YELLOW, :YELLOW_LOW, :YELLOW_HIGH
      @logger.warn(message, type: Logger::NOTIFICATION)
    when :RED, :RED_LOW, :RED_HIGH
      @logger.error(message, type: Logger::ALERT)
    end
  end

  # The openc3_limits_events topic can be listened to for all limits events, it is a continuous stream
  event = { type: :LIMITS_CHANGE, target_name: packet.target_name, packet_name: packet.packet_name,
            item_name: item.name, old_limits_state: old_limits_state.to_s, new_limits_state: item.limits.state.to_s,
            time_nsec: time_nsec, message: message.to_s }
  LimitsEventTopic.write(event, scope: @scope)

  if item.limits.response
    begin
      # TODO: The limits response is user code and should be run as a separate thread / process
      # If this code blocks it will delay TelemetryDecomTopic.write_packet
      item.limits.response.call(packet, item, old_limits_state)
    rescue Exception => e
      @error = e
      @logger.error "#{packet.target_name} #{packet.packet_name} #{item.name} Limits Response Exception!"
      @logger.error "Called with old_state = #{old_limits_state}, new_state = #{item.limits.state}"
      @logger.error e.filtered
    end
  end
end

#run ⇒ Object 



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# File 'lib/openc3/microservices/decom_microservice.rb', line 47

def run
  setup_microservice_topic()
  while true
    break if @cancel_thread

    begin
      OpenC3.in_span("read_topics") do
        Topic.read_topics(@topics) do |topic, msg_id, msg_hash, redis|
          break if @cancel_thread
          if topic == @microservice_topic
            microservice_cmd(topic, msg_id, msg_hash, redis)
          elsif topic =~ /__DECOMINTERFACE/
            if msg_hash.key?('inject_tlm')
              handle_inject_tlm(msg_hash['inject_tlm'])
              next
            end
            if msg_hash.key?('build_cmd')
              handle_build_cmd(msg_hash['build_cmd'], msg_id)
              next
            end
          else
            decom_packet(topic, msg_id, msg_hash, redis)
            @metric.set(name: 'decom_total', value: @count, type: 'counter')
          end
          @count += 1
        end
      end
      LimitsEventTopic.sync_system_thread_body(scope: @scope)
    rescue => e
      @error_count += 1
      @metric.set(name: 'decom_error_total', value: @error_count, type: 'counter')
      @error = e
      @logger.error("Decom error: #{e.formatted}")
    end
  end
end