Class: OpenC3::FileInterface

Inherits:
Interface show all
Defined in:
lib/openc3/interfaces/file_interface.rb

Constant Summary

Constants included from Api

Api::DELAY_METRICS, Api::DURATION_METRICS, Api::SUBSCRIPTION_DELIMITER, Api::SUM_METRICS

Constants included from ApiShared

ApiShared::DEFAULT_TLM_POLLING_RATE

Constants included from Extract

Extract::SCANNING_REGULAR_EXPRESSION

Instance Attribute Summary collapse

Attributes inherited from Interface

#auto_reconnect, #bytes_read, #bytes_written, #cmd_routers, #cmd_target_names, #config_params, #connect_on_startup, #disable_disconnect, #interfaces, #name, #num_clients, #options, #packet_log_writer_pairs, #protocol_info, #read_count, #read_protocols, #read_queue_size, #read_raw_data, #read_raw_data_time, #reconnect_delay, #routers, #scheduler, #secrets, #state, #stored_packet_log_writer_pairs, #stream_log_pair, #target_names, #tlm_target_names, #write_count, #write_protocols, #write_queue_size, #written_raw_data, #written_raw_data_time

Instance Method Summary collapse

Methods inherited from Interface

#_write, #add_protocol, #as_json, #connection_string, #convert_packet_to_data, #copy_to, #interface_cmd, #post_connect, #protocol_cmd, #read, #read_allowed?, #read_interface_base, #start_raw_logging, #stop_raw_logging, #write, #write_allowed?, #write_interface_base, #write_raw, #write_raw_allowed?

Methods included from Api

#_build_cmd_output_string, #_cmd_implementation, #_extract_target_command_names, #_extract_target_command_parameter_names, #_extract_target_packet_item_names, #_extract_target_packet_names, #_get_and_set_cmd, #_get_item, #_limits_group, #_set_tlm_process_args, #_tlm_process_args, #_validate_tlm_type, #build_cmd, #cmd, #cmd_no_checks, #cmd_no_hazardous_check, #cmd_no_range_check, #cmd_raw, #cmd_raw_no_checks, #cmd_raw_no_hazardous_check, #cmd_raw_no_range_check, #config_tool_names, #connect_interface, #connect_router, #delete_config, #disable_cmd, #disable_limits, #disable_limits_group, #disconnect_interface, #disconnect_router, #enable_cmd, #enable_limits, #enable_limits_group, #get_all_cmd_names, #get_all_cmds, #get_all_interface_info, #get_all_router_info, #get_all_settings, #get_all_tlm, #get_all_tlm_item_names, #get_all_tlm_names, #get_cmd, #get_cmd_buffer, #get_cmd_cnt, #get_cmd_cnts, #get_cmd_hazardous, #get_cmd_time, #get_cmd_value, #get_interface, #get_interface_names, #get_item, #get_limits, #get_limits_events, #get_limits_groups, #get_limits_set, #get_limits_sets, #get_metrics, #get_out_of_limits, #get_overall_limits_state, #get_overrides, #get_packet_derived_items, #get_packets, #get_param, #get_router, #get_router_names, #get_setting, #get_settings, #get_target, #get_target_interfaces, #get_target_names, #get_tlm, #get_tlm_buffer, #get_tlm_cnt, #get_tlm_cnts, #get_tlm_packet, #get_tlm_values, #inject_tlm, #interface_cmd, #interface_protocol_cmd, #limits_enabled?, #list_configs, #list_settings, #load_config, #map_target_to_interface, #normalize_tlm, #offline_access_needed, #override_tlm, #router_cmd, #router_protocol_cmd, #save_config, #send_raw, #set_limits, #set_limits_set, #set_offline_access, #set_setting, #set_tlm, #start_raw_logging_interface, #start_raw_logging_router, #stash_all, #stash_delete, #stash_get, #stash_keys, #stash_set, #stop_raw_logging_interface, #stop_raw_logging_router, #subscribe_packets, #tlm, #tlm_formatted, #tlm_raw, #tlm_variable, #tlm_with_units, #update_news

Constructor Details

#initialize(command_write_folder, telemetry_read_folder, telemetry_archive_folder, file_read_size = 65536, stored = true, protocol_type = nil, *protocol_args) ⇒ FileInterface

Returns a new instance of FileInterface.

Parameters:

  • command_write_folder (String) —

    Folder to write command files to - Set to nil to disallow writes

  • telemetry_read_folder (String) —

    Folder to read telemetry files from - Set to nil to disallow reads

  • telemetry_archive_folder (String) —

    Folder to move read telemetry files to - Set to DELETE to delete files

  • file_read_size (Integer) (defaults to: 65536) —

    Number of bytes to read from the file at a time

  • stored (Boolean) (defaults to: true) —

    Whether to set stored flag on read telemetry

  • protocol_type (String) (defaults to: nil) —

    Name of the protocol to use with this interface

  • protocol_args (Array<String>) —

    Arguments to pass to the protocol



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# File 'lib/openc3/interfaces/file_interface.rb', line 39

def initialize(
  command_write_folder,
  telemetry_read_folder,
  telemetry_archive_folder,
  file_read_size = 65536,
  stored = true,
  protocol_type = nil,
  *protocol_args
)
  super()

  @protocol_type = ConfigParser.handle_nil(protocol_type)
  @protocol_args = protocol_args
  if @protocol_type
    protocol_class_name = protocol_type.to_s.capitalize << 'Protocol'
    klass = OpenC3.require_class(protocol_class_name.class_name_to_filename)
    add_protocol(klass, protocol_args, :PARAMS)
  end

  @command_write_folder = ConfigParser.handle_nil(command_write_folder)
  @telemetry_read_folder = ConfigParser.handle_nil(telemetry_read_folder)
  @telemetry_archive_folder = ConfigParser.handle_nil(telemetry_archive_folder)
  @file_read_size = Integer(file_read_size)
  @stored = ConfigParser.handle_true_false(stored)

  @read_allowed = false unless @telemetry_read_folder
  @write_allowed = false unless @command_write_folder
  @write_raw_allowed = false unless @command_write_folder

  @file = nil
  @filename = ''
  @listener = nil
  @connected = false
  @extension = ".bin"
  @label = "command"
  @queue = Queue.new
  @polling = false
  @recursive = false
  @throttle = nil
  @discard_file_header_bytes = nil
  @sleeper = nil
end

Instance Attribute Details

#filename ⇒ Object (readonly)

Returns the value of attribute filename.



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# File 'lib/openc3/interfaces/file_interface.rb', line 29

def filename
  @filename
end

Instance Method Details

#connect ⇒ Object 



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# File 'lib/openc3/interfaces/file_interface.rb', line 82

def connect
  super() # Reset the protocols

  if @telemetry_read_folder
    @listener = Listen.to(@telemetry_read_folder, force_polling: @polling) do |modified, added, removed|
      @queue << added if added
    end
    @listener.start # starts a listener thread - does not block
  end
  @connected = true
end

#connected? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/openc3/interfaces/file_interface.rb', line 94

def connected?
  return @connected
end

#convert_data_to_packet(data, extra = nil) ⇒ Object 



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# File 'lib/openc3/interfaces/file_interface.rb', line 156

def convert_data_to_packet(data, extra = nil)
  packet = super(data, extra)
  if packet
    packet.stored = @stored
  end
  return packet
end

#create_unique_filename ⇒ Object 



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# File 'lib/openc3/interfaces/file_interface.rb', line 212

def create_unique_filename
  # Create a filename that doesn't exist
  attempt = nil
  while true
    filename = File.join(@command_write_folder, File.build_timestamped_filename([@label, attempt], @extension))
    if File.exist?(filename)
      attempt ||= 0
      attempt += 1
    else
      return filename
    end
  end
end

#disconnect ⇒ Object 



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# File 'lib/openc3/interfaces/file_interface.rb', line 98

def disconnect
  @file.close if @file and not @file.closed?
  @file = nil
  @sleeper.cancel if @sleeper
  @listener.stop if @listener
  @listener = nil
  @queue << nil
  super()
  @connected = false
end

#finish_file ⇒ Object 



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# File 'lib/openc3/interfaces/file_interface.rb', line 187

def finish_file
  path = @file.path
  @file.close
  @file = nil

  # Archive (or DELETE) complete file
  if @telemetry_archive_folder == "DELETE"
    FileUtils.rm(path)
  else
    FileUtils.mv(path, @telemetry_archive_folder)
  end
end

#get_next_telemetry_file ⇒ Object 



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# File 'lib/openc3/interfaces/file_interface.rb', line 200

def get_next_telemetry_file
  files = []
  if @recursive
    files = Dir.glob("#{@telemetry_read_folder}/**/*")
  else
    files = Dir.glob("#{@telemetry_read_folder}/*")
  end
  # Dir.glob includes directories, so filter them out
  files = files.sort.select { |fn| File.file?(fn) }
  return files[0]
end

#read_interface ⇒ Object 



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# File 'lib/openc3/interfaces/file_interface.rb', line 109

def read_interface
  while true
    if @file
      # Read more data from existing file
      data = @file.read(@file_read_size)
      # Throttle after each read size
      if @throttle and @sleeper.sleep(@throttle)
        return nil, nil
      end
      if data and data.length > 0
        read_interface_base(data, nil)
        return data, nil
      else
        finish_file()
      end
    end

    # Find the next file to read
    @filename = get_next_telemetry_file()
    if @filename
      if File.extname(@filename) == ".gz"
        @file = Zlib::GzipReader.open(@filename)
      else
        @file = File.open(@filename, "rb")
      end
      if @discard_file_header_bytes
        @file.read(@discard_file_header_bytes)
      end
      next
    end

    # Wait for a file to read
    result = @queue.pop
    return nil, nil unless result
  end
end

#set_option(option_name, option_values) ⇒ Object

Supported Options LABEL - Label to add to written files EXTENSION - Extension to add to written files (see Interface#set_option)



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# File 'lib/openc3/interfaces/file_interface.rb', line 168

def set_option(option_name, option_values)
  super(option_name, option_values)
  case option_name.upcase
  when 'LABEL'
    @label = option_values[0]
  when 'EXTENSION'
    @extension = option_values[0]
  when 'POLLING'
    @polling = ConfigParser.handle_true_false(option_values[0])
  when 'RECURSIVE'
    @recursive = ConfigParser.handle_true_false(option_values[0])
  when 'THROTTLE'
    @throttle = Float(option_values[0])
    @sleeper = Sleeper.new
  when 'DISCARD_FILE_HEADER_BYTES'
    @discard_file_header_bytes = Integer(option_values[0])
  end
end

#write_interface(data, extra = nil) ⇒ Object 



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# File 'lib/openc3/interfaces/file_interface.rb', line 146

def write_interface(data, extra = nil)
  # Write this data into its own file
  File.open(create_unique_filename(), 'wb') do |file|
    file.write(data)
  end

  write_interface_base(data, extra)
  return data, extra
end