Class: Daengine::DigitalAssetProcessor

Inherits:
Object
  • Object
show all
Defined in:
lib/daengine/digital_asset_processor.rb

Constant Summary collapse

@@last_read_time = 
2.days.ago

Class Method Summary collapse

Class Method Details

.execute ⇒ Object 



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# File 'lib/daengine/digital_asset_processor.rb', line 23

def self.execute
  @@run = true
  trap_signals
  @@wthread = Thread.new { worker() }
  return @@wthread
end

.is_windows? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/daengine/digital_asset_processor.rb', line 18

def self.is_windows?
  processor, platform, *rest = RUBY_PLATFORM.split("-")
  platform =~ /mswin/ || platform =~ /mingw/
end

.process_tuple_directory ⇒ Object 



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# File 'lib/daengine/digital_asset_processor.rb', line 45

def self.process_tuple_directory
  path = Daengine.config[:assets_path]
  raise "ERROR: DigitalAssetProcessor: Invalid assets_path provided. Unable to read from #{path}" unless File::directory?(path)
  # read the given directory, process each file in date order starting 2 days ago if last_read_time is nil
  time = self.read_last_process_time
  if not time.blank?
    @@last_read_time = time
  end
  Daengine.log("DigitalAssetProcessor: Last process time was #{@@last_read_time}", "info")
  deploy_files= []

  deploy_files = Dir.entries(path).select {
      |f| File.file?("#{path}/#{f}") and File.mtime("#{path}/#{f}") > @@last_read_time
  }.sort_by { |f| File.mtime("#{path}/#{f}") }

  if deploy_files.empty?
    Daengine.log("WARN: DigitalAssetProcessor: No digital asset deployment files found to process under #{path}", "warn")
  else
    Daengine.log("DigitalAssetProcessor: Reading digital asset deployment files from #{path}", "info")
    deploy_files.each do |filename|
      #parse the file and add metadata content to database.
      file = File.expand_path(filename, path)
      Daengine.log("DigitalAssetProcessor: Processing file #{filename} --- #{File.mtime(file)}", "info")
      open_file = File.open(file, 'rb')
      Daengine::TeamsiteMetadataParser.parse_tuple_file(open_file)
      Daengine.log("DigitalAssetProcessor: Finished processing #{filename}", "info")
      @@last_read_time = File.mtime(file) + 1.second
      self.save_last_read_time
      Daengine.log("DigitalAssetProcessor: Last process time set to #{@@last_read_time}", "info")
    end
  end
end

.read_last_process_time ⇒ Object 



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# File 'lib/daengine/digital_asset_processor.rb', line 90

def self.read_last_process_time
  time = ""
  begin
    target = Daengine.config[:daengine_yml_file]
    property = YAML.load_file(target)
    time = property['last_read_time']
  rescue Exception => e
    Daengine.log("ERROR: DigitalAssetProcessor: Failed to read from #{target}", "error")
  end
  time
end

.save_last_read_time ⇒ Object 



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# File 'lib/daengine/digital_asset_processor.rb', line 78

def self.save_last_read_time
  begin
    target = Daengine.config[:daengine_yml_file]
    content = "last_read_time: #{@@last_read_time}"
    File.open(target, "w+") do |f|
      f.write(content)
    end
  rescue Exception => e
    Daengine.log("ERROR: DigitalAssetProcessor: Failed to write to #{target}.", "error")
  end
end

.trap_signals ⇒ Object 



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# File 'lib/daengine/digital_asset_processor.rb', line 6

def self.trap_signals
  sigtrap = proc {
    puts "DigitalAssetProcessor: caught trapped signal, shutting down"
    @@run = false
  }
  signals = ["SIGTERM", "SIGINT"]
  signals.push("SIGHUP") unless is_windows?
  signals.each do |signal|
    trap signal, sigtrap
  end
end

.worker ⇒ Object 



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# File 'lib/daengine/digital_asset_processor.rb', line 30

def self.worker
  puts "DigitalAssetProcessor: start processing digital assets!"
  while @@run
    begin
      self.process_tuple_directory
      process_tuple_directory
    rescue => e
      puts e.message
      puts e.backtrace
    end
    sleep(5)
  end
  @@wthread.exit
end