Class: OpenC3::ServerProxy

Inherits:
Object show all
Defined in:
lib/openc3/script/script.rb

Overview

Provides a proxy to the JsonDRbObject which communicates with the API server

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ServerProxy

Create a JsonDRbObject connection to the API server



243
244
245
246
247
248
249
 
# File 'lib/openc3/script/script.rb', line 243

def initialize
  @json_drb = JsonDRbObject.new(
    url: generate_url(),
    timeout: generate_timeout(),
    authentication: generate_auth()
  )
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method_name, *method_params, **kw_params) ⇒ Object

Ruby method which captures any method calls on this object. This allows us to proxy the methods to the API server through the JsonDRbObject.



253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
 
# File 'lib/openc3/script/script.rb', line 253

def method_missing(method_name, *method_params, **kw_params)
  # Must call shutdown and disconnect on the JsonDRbObject itself
  # to avoid it being sent to the API
  kw_params[:scope] = $openc3_scope unless kw_params[:scope]
  case method_name
  when :shutdown
    @json_drb.shutdown
  when :request
    @json_drb.request(*method_params, **kw_params)
  else
    # If :disconnect is there delete it and return the value
    # If it is not there, delete returns nil
    disconnect = kw_params.delete(:disconnect)
    if $disconnect
      return disconnect if disconnect
      # The only commands allowed through in disconnect mode are read-only
      # Thus we allow the get, list, tlm and limits_enabled and subscribe methods
      if method_name =~ /\w*_get$|^get_\w*|\w*_list$|^list_\w*|^tlm|^limits_enabled$|^subscribe$/
        return @json_drb.method_missing(method_name, *method_params, **kw_params)
      else
        return nil
      end
    else
      @json_drb.method_missing(method_name, *method_params, **kw_params)
    end
  end
end

Instance Method Details

#generate_auth ⇒ Object

generate the auth object



230
231
232
233
234
235
236
237
238
239
240
 
# File 'lib/openc3/script/script.rb', line 230

def generate_auth
  if ENV['OPENC3_API_TOKEN'].nil? and ENV['OPENC3_API_USER'].nil?
    if ENV['OPENC3_API_PASSWORD']
      return OpenC3Authentication.new()
    else
      return nil
    end
  else
    return OpenC3KeycloakAuthentication.new(ENV['OPENC3_KEYCLOAK_URL'])
  end
end

#generate_timeout ⇒ Object

pull openc3-cosmos-cmd-tlm-api timeout from environment variables



224
225
226
227
 
# File 'lib/openc3/script/script.rb', line 224

def generate_timeout
  timeout = ENV['OPENC3_API_TIMEOUT'] || '1.0'
  return timeout.to_f
end

#generate_url ⇒ Object

pull openc3-cosmos-cmd-tlm-api url from environment variables



215
216
217
218
219
220
221
 
# File 'lib/openc3/script/script.rb', line 215

def generate_url
  schema = ENV['OPENC3_API_SCHEMA'] || 'http'
  hostname = ENV['OPENC3_API_HOSTNAME'] || (ENV['OPENC3_DEVEL'] ? '127.0.0.1' : 'openc3-cosmos-cmd-tlm-api')
  port = ENV['OPENC3_API_PORT'] || '2901'
  port = port.to_i
  return "#{schema}://#{hostname}:#{port}"
end