Class: OpenC3::PluginModel

Inherits:
Model show all
Includes:
Api
Defined in:
lib/openc3/models/plugin_model.rb

Overview

Represents a OpenC3 plugin that can consist of targets, interfaces, routers microservices and tools. The PluginModel installs all these pieces as well as destroys them all when the plugin is removed.

Constant Summary collapse

PRIMARY_KEY = 
'openc3_plugins'
RESERVED_VARIABLE_NAMES =

Reserved VARIABLE names. See local_mode.rb: update_local_plugin()

['target_name', 'microservice_name', 'scope']

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 Model

#name, #plugin, #scope, #updated_at

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Api

#_build_cmd_output_string, #_cmd_implementation, #_get_item, #_limits_group, #_set_tlm_process_args, #_tlm_process_args, #_validate_tlm_type, #build_command, #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_limits, #disable_limits_group, #disconnect_interface, #disconnect_router, #enable_limits, #enable_limits_group, #get_all_command_names, #get_all_commands, #get_all_interface_info, #get_all_router_info, #get_all_settings, #get_all_target_info, #get_all_telemetry, #get_all_telemetry_names, #get_cmd_buffer, #get_cmd_cnt, #get_cmd_cnts, #get_cmd_hazardous, #get_cmd_time, #get_cmd_value, #get_command, #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_parameter, #get_router, #get_router_names, #get_setting, #get_settings, #get_target, #get_target_interfaces, #get_target_names, #get_telemetry, #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

Methods inherited from Model

#check_disable_erb, #deploy, #destroy, #destroyed?, filter, find_all_by_plugin, from_json, get_all_models, get_model, handle_config, set, store, #update

Constructor Details

#initialize(name:, variables: {}, plugin_txt_lines: [], needs_dependencies: false, updated_at: nil, scope:) ⇒ PluginModel

Returns a new instance of PluginModel.



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# File 'lib/openc3/models/plugin_model.rb', line 268

def initialize(
  name:,
  variables: {},
  plugin_txt_lines: [],
  needs_dependencies: false,
  updated_at: nil,
  scope:
)
  super("#{scope}__#{PRIMARY_KEY}", name: name, updated_at: updated_at, scope: scope)
  @variables = variables
  @plugin_txt_lines = plugin_txt_lines
  @needs_dependencies = ConfigParser.handle_true_false(needs_dependencies)
end

Instance Attribute Details

#needs_dependencies ⇒ Object

Returns the value of attribute needs_dependencies.



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# File 'lib/openc3/models/plugin_model.rb', line 55

def needs_dependencies
  @needs_dependencies
end

#plugin_txt_lines ⇒ Object

Returns the value of attribute plugin_txt_lines.



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# File 'lib/openc3/models/plugin_model.rb', line 54

def plugin_txt_lines
  @plugin_txt_lines
end

#variables ⇒ Object

Returns the value of attribute variables.



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# File 'lib/openc3/models/plugin_model.rb', line 53

def variables
  @variables
end

Class Method Details

.all(scope: nil) ⇒ Object 



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# File 'lib/openc3/models/plugin_model.rb', line 67

def self.all(scope: nil)
  super("#{scope}__#{PRIMARY_KEY}")
end

.gem_names ⇒ Object

Get list of plugin gem names across all scopes to prevent uninstall of gems from GemModel



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# File 'lib/openc3/models/plugin_model.rb', line 331

def self.gem_names
  result = []
  scopes = ScopeModel.names
  scopes.each do |scope|
    plugin_names = self.names(scope: scope)
    plugin_names.each do |plugin_name|
      gem_name = plugin_name.split("__")[0]
      result << gem_name unless result.include?(gem_name)
    end
  end
  return result.sort
end

.get(name:, scope: nil) ⇒ Object

NOTE: The following three class methods are used by the ModelController and are reimplemented to enable various Model class methods to work



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# File 'lib/openc3/models/plugin_model.rb', line 59

def self.get(name:, scope: nil)
  super("#{scope}__#{PRIMARY_KEY}", name: name)
end

.install_phase1(gem_file_path, existing_variables: nil, existing_plugin_txt_lines: nil, process_existing: false, scope:, validate_only: false) ⇒ Object

Called by the PluginsController to parse the plugin variables Doesn’t actaully create the plugin during the phase



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# File 'lib/openc3/models/plugin_model.rb', line 73

def self.install_phase1(gem_file_path, existing_variables: nil, existing_plugin_txt_lines: nil, process_existing: false, scope:, validate_only: false)
  gem_name = File.basename(gem_file_path).split("__")[0]

  temp_dir = Dir.mktmpdir
  tf = nil
  begin
    if File.exist?(gem_file_path)
      # Load gem to internal gem server
      OpenC3::GemModel.put(gem_file_path, gem_install: false, scope: scope) unless validate_only
    else
      gem_file_path = OpenC3::GemModel.get(gem_name)
    end

    # Extract gem and process plugin.txt to determine what VARIABLEs need to be filled in
    pkg = Gem::Package.new(gem_file_path)

    if existing_plugin_txt_lines and process_existing
      # This is only used in openc3cli load when everything is known
      plugin_txt_lines = existing_plugin_txt_lines
      file_data = existing_plugin_txt_lines.join("\n")
      tf = Tempfile.new("plugin.txt")
      tf.write(file_data)
      tf.close
      plugin_txt_path = tf.path
    else
      # Otherwise we always process the new and return both
      pkg.extract_files(temp_dir)
      plugin_txt_path = File.join(temp_dir, 'plugin.txt')
      plugin_text = File.read(plugin_txt_path)
      plugin_txt_lines = []
      plugin_text.each_line do |line|
        plugin_txt_lines << line.chomp
      end
    end

    parser = OpenC3::ConfigParser.new("https://openc3.com")

    # Phase 1 Gather Variables
    variables = {}
    parser.parse_file(plugin_txt_path,
                      false,
                      true,
                      false) do |keyword, params|
      case keyword
      when 'VARIABLE'
        usage = "#{keyword} <Variable Name> <Default Value>"
        parser.verify_num_parameters(2, nil, usage)
        variable_name = params[0]
        if RESERVED_VARIABLE_NAMES.include?(variable_name)
          raise "VARIABLE name '#{variable_name}' is reserved"
        end
        value = params[1..-1].join(" ")
        variables[variable_name] = value
        if existing_variables && existing_variables.key?(variable_name)
          variables[variable_name] = existing_variables[variable_name]
        end
      end
    end

    model = PluginModel.new(name: gem_name, variables: variables, plugin_txt_lines: plugin_txt_lines, scope: scope)
    result = model.as_json(:allow_nan => true)
    result['existing_plugin_txt_lines'] = existing_plugin_txt_lines if existing_plugin_txt_lines and not process_existing and existing_plugin_txt_lines != result['plugin_txt_lines']
    return result
  ensure
    FileUtils.remove_entry(temp_dir) if temp_dir and File.exist?(temp_dir)
    tf.unlink if tf
  end
end

.install_phase2(plugin_hash, scope:, gem_file_path: nil, validate_only: false) ⇒ Object

Called by the PluginsController to create the plugin Because this uses ERB it must be run in a seperate process from the API to prevent corruption and single require problems in the current proces



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# File 'lib/openc3/models/plugin_model.rb', line 145

def self.install_phase2(plugin_hash, scope:, gem_file_path: nil, validate_only: false)
  # Register plugin to aid in uninstall if install fails
  plugin_hash.delete("existing_plugin_txt_lines")
  plugin_model = PluginModel.new(**(plugin_hash.transform_keys(&:to_sym)), scope: scope)
  plugin_model.create unless validate_only

  temp_dir = Dir.mktmpdir
  begin
    tf = nil

    # Get the gem from local gem server if it hasn't been passed
    unless gem_file_path
      gem_name = plugin_hash['name'].split("__")[0]
      gem_file_path = OpenC3::GemModel.get(gem_name)
    end

    # Actually install the gem now (slow)
    OpenC3::GemModel.install(gem_file_path, scope: scope) unless validate_only

    # Extract gem contents
    gem_path = File.join(temp_dir, "gem")
    FileUtils.mkdir_p(gem_path)
    pkg = Gem::Package.new(gem_file_path)
    pkg.extract_files(gem_path)
    Dir[File.join(gem_path, '**/screens/*.txt')].each do |filename|
      if File.basename(filename) != File.basename(filename).downcase
        raise "Invalid screen filename: #{filename}. Screen filenames must be lowercase."
      end
    end
    needs_dependencies = pkg.spec.runtime_dependencies.length > 0
    needs_dependencies = true if Dir.exist?(File.join(gem_path, 'lib'))

    # Handle python requirements.txt
    if File.exist?(File.join(gem_path, 'requirements.txt'))
      begin
        pypi_url = get_setting('pypi_url', scope: scope)
      rescue
        # If Redis isn't running try the ENV, then simply pypi.org/simple
        pypi_url = ENV['PYPI_URL']
        pypi_url ||= 'https://pypi.org/simple'
      end
      Logger.info "Installing python packages from requirements.txt"
      puts `pip install --user -i #{pypi_url} -r #{File.join(gem_path, 'requirements.txt')}`
      needs_dependencies = true
    end

    # If needs_dependencies hasn't already been set we need to scan the plugin.txt
    # to see if they've explicitly set the NEEDS_DEPENDENCIES keyword
    unless needs_dependencies
      if plugin_hash['plugin_txt_lines'].join("\n").include?('NEEDS_DEPENDENCIES')
        needs_dependencies = true
      end
    end
    if needs_dependencies
      plugin_model.needs_dependencies = true
      plugin_model.update unless validate_only
    end

    # Temporarily add all lib folders from the gem to the end of the load path
    load_dirs = []
    begin
      Dir.glob("#{gem_path}/**/*").each do |load_dir|
        if File.directory?(load_dir) and File.basename(load_dir) == 'lib'
          load_dirs << load_dir
          $LOAD_PATH << load_dir
        end
      end

      # Process plugin.txt file
      file_data = plugin_hash['plugin_txt_lines'].join("\n")
      tf = Tempfile.new("plugin.txt")
      tf.write(file_data)
      tf.close
      plugin_txt_path = tf.path
      variables = plugin_hash['variables']
      variables ||= {}
      variables['scope'] = scope
      if File.exist?(plugin_txt_path)
        parser = OpenC3::ConfigParser.new("https://openc3.com")

        current_model = nil
        parser.parse_file(plugin_txt_path, false, true, true, variables) do |keyword, params|
          case keyword
          when 'VARIABLE', 'NEEDS_DEPENDENCIES'
            # Ignore during phase 2
          when 'TARGET', 'INTERFACE', 'ROUTER', 'MICROSERVICE', 'TOOL', 'WIDGET'
            if current_model
              current_model.create unless validate_only
              current_model.deploy(gem_path, variables, validate_only: validate_only)
              current_model = nil
            end
            current_model = OpenC3.const_get((keyword.capitalize + 'Model').intern).handle_config(parser,
              keyword, params, plugin: plugin_model.name, needs_dependencies: needs_dependencies, scope: scope)
          else
            if current_model
              current_model.handle_config(parser, keyword, params)
            else
              raise "Invalid keyword '#{keyword}' in plugin.txt"
            end
          end
        end
        if current_model
          current_model.create unless validate_only
          current_model.deploy(gem_path, variables, validate_only: validate_only)
          current_model = nil
        end
      end
    ensure
      load_dirs.each do |load_dir|
        $LOAD_PATH.delete(load_dir)
      end
    end
  rescue => err
    # Install failed - need to cleanup
    plugin_model.destroy unless validate_only
    raise err
  ensure
    FileUtils.remove_entry(temp_dir) if temp_dir and File.exist?(temp_dir)
    tf.unlink if tf
  end
  return plugin_model.as_json(:allow_nan => true)
end

.names(scope: nil) ⇒ Object 



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# File 'lib/openc3/models/plugin_model.rb', line 63

def self.names(scope: nil)
  super("#{scope}__#{PRIMARY_KEY}")
end

Instance Method Details

#as_json(*a) ⇒ Object 



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# File 'lib/openc3/models/plugin_model.rb', line 287

def as_json(*a)
  {
    'name' => @name,
    'variables' => @variables,
    'plugin_txt_lines' => @plugin_txt_lines,
    'needs_dependencies' => @needs_dependencies,
    'updated_at' => @updated_at
  }
end

#create(update: false, force: false) ⇒ Object 



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# File 'lib/openc3/models/plugin_model.rb', line 282

def create(update: false, force: false)
  @name = @name + "__#{Time.now.utc.strftime("%Y%m%d%H%M%S")}" if not update and not @name.index("__")
  super(update: update, force: force)
end

#restore ⇒ Object

Reinstall



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# File 'lib/openc3/models/plugin_model.rb', line 323

def restore
  plugin_hash = self.as_json(:allow_nan => true)
  plugin_hash['name'] = plugin_hash['name'].split("__")[0]
  OpenC3::PluginModel.install_phase2(plugin_hash, scope: @scope)
  @destroyed = false
end

#undeploy ⇒ Object

Undeploy all models associated with this plugin



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# File 'lib/openc3/models/plugin_model.rb', line 298

def undeploy
  microservice_count = 0
  microservices = MicroserviceModel.find_all_by_plugin(plugin: @name, scope: @scope)
  microservices.each do |name, model_instance|
    model_instance.destroy
    microservice_count += 1
  end
  # Wait for the operator to wake up and remove the microservice processes
  sleep 15 if microservice_count > 0 # Cycle time 5s times 2 plus 5s wait for soft stop and then hard stop
  # Remove all the other models now that the processes have stopped
  # Save TargetModel for last as it has the most to cleanup
  [InterfaceModel, RouterModel, ToolModel, WidgetModel, TargetModel].each do |model|
    model.find_all_by_plugin(plugin: @name, scope: @scope).each do |name, model_instance|
      model_instance.destroy
    end
  end
  # Cleanup Redis stuff that might have been left by microservices
  microservices.each do |name, model_instance|
    model_instance.cleanup
  end
rescue Exception => error
  Logger.error("Error undeploying plugin model #{@name} in scope #{@scope} due to #{error}")
end