Class: LoadLibraryHandler

Inherits:
AbstractCommandHandler show all
Defined in:
lib/javonet-ruby-sdk/core/handler/load_library_handler.rb

Constant Summary collapse

@@loaded_libraries = 
[]

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from AbstractCommandHandler

#handle_command, #iterate

Constructor Details

#initialize ⇒ LoadLibraryHandler

Returns a new instance of LoadLibraryHandler.



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# File 'lib/javonet-ruby-sdk/core/handler/load_library_handler.rb', line 7

def initialize
  @required_parameters_count = 1
end

Class Method Details

.get_loaded_libraries ⇒ Object 



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# File 'lib/javonet-ruby-sdk/core/handler/load_library_handler.rb', line 46

def self.get_loaded_libraries
  @@loaded_libraries
end

Instance Method Details

#process(command) ⇒ Object 



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# File 'lib/javonet-ruby-sdk/core/handler/load_library_handler.rb', line 11

def process(command)
  begin
    if command.payload.length < @required_parameters_count
      raise ArgumentError.new "Load library parameters mismatch"
    end

    assembly_name =
      if command.payload.length > @required_parameters_count
        command.payload[1]
      else
        command.payload[0]
      end

    # Normalize to absolute path
    expanded_path = File.expand_path(assembly_name)

    # Load only once per absolute path
    if @@loaded_libraries.include?(expanded_path)
      return 0
    end

    # Check if the library exists:
    raise LoadError.new("Library not found: #{assembly_name}") unless File.exist?(expanded_path)

    # Require by path; Ruby will also avoid re-loading the same feature,
    # but we additionally track it ourselves.
    require expanded_path

    @@loaded_libraries << expanded_path
    return 0
  rescue Exception => e
    return e
  end
end