Module: ContentServer

Defined in:
lib/content_server/backup_server.rb,
lib/content_server.rb,
lib/content_server/globals.rb,
lib/content_server/version.rb,
lib/content_server/queue_copy.rb,
lib/content_server/file_streamer.rb,
lib/content_server/queue_indexer.rb,
lib/content_server/content_server.rb,
lib/content_server/remote_content.rb,
lib/content_server/content_receiver.rb

Overview

Content server. Monitors files, index local files, listen to backup server content, copy changes and new files to backup server.

Defined Under Namespace

Classes: ContentDataReceiver, ContentDataSender, FileCopyClient, FileCopyServer, FileReceiver, FileStreamer, Globals, QueueIndexer, RemoteContentClient, RemoteContentServer, Stream

Constant Summary collapse

VERSION = 
"1.1.0"

Class Method Summary collapse

Class Method Details

.local_dynamic_content_data ⇒ Object 



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# File 'lib/content_server/backup_server.rb', line 35

def self.local_dynamic_content_data
  @@local_dynamic_content_data
end

.run_backup_server ⇒ Object 



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# File 'lib/content_server/backup_server.rb', line 39

def run_backup_server
  Log.info('Start backup server')
  Thread.abort_on_exception = true
  all_threads = []

  # create general tmp dir
  FileUtils.mkdir_p(Params['tmp_path']) unless File.directory?(Params['tmp_path'])
  # init tmp content data file
  @@tmp_content_data_file = File.join(Params['tmp_path'], 'backup.data')

  if Params['enable_monitoring']
    Log.info("Initializing monitoring of process params on port:#{Params['process_monitoring_web_port']}")
    ::ContentServer::Globals.process_vars.set('server_name', 'backup_server')
  end

  # # # # # # # # # # # #
  # Initialize/start monitoring and destination folder
  Params['backup_destination_folder'][0]['path']=File.expand_path(Params['backup_destination_folder'][0]['path'])
  Log.info("backup_destination_folder is:#{Params['backup_destination_folder'][0]['path']}")
  #adding destination folder to monitoring paths
  Params['monitoring_paths'] << Params['backup_destination_folder'][0]
  Log.info('Start monitoring following directories:')
  Params['monitoring_paths'].each { |path|
    Log.info("  Path:'#{path['path']}'")
  }

  # Read here for initial content data that exist from previous system run
  initial_content_data = ContentData::ContentData.new
  content_data_path = Params['local_content_data_path']
  initial_content_data.from_file(content_data_path) if File.exists?(content_data_path)
  # Update local dynamic content with existing content
  @@local_dynamic_content_data = ContentData::DynamicContentData.new
  @@local_dynamic_content_data.update(initial_content_data)

  monitoring_events = Queue.new
  fm = FileMonitoring::FileMonitoring.new(@@local_dynamic_content_data)
  fm.set_event_queue(monitoring_events)
  # Start monitoring and writing changes to queue
  all_threads << Thread.new do
    fm.monitor_files
  end

  # # # # # # # # # # # # # #
  # Initialize/Start local indexer
  Log.debug1('Start indexer')
  queue_indexer = QueueIndexer.new(monitoring_events, @@local_dynamic_content_data)
  # Start indexing on demand and write changes to queue
  all_threads << queue_indexer.run

  # # # # # # # # # # # # # # # # # # # # # # # #
  # Start dump local content data to file thread
  Log.debug1('Start dump local content data to file thread')
  all_threads << Thread.new do
    last_data_flush_time = nil
    while true do
      if last_data_flush_time.nil? || last_data_flush_time + Params['data_flush_delay'] < Time.now.to_i
        Log.info "Writing local content data to #{Params['local_content_data_path']}."
        @@local_dynamic_content_data.last_content_data.to_file(@@tmp_content_data_file)
        sleep(0.1)  # Added to prevent mv access issue
        ::FileUtils.mv(@@tmp_content_data_file, Params['local_content_data_path'])
        last_data_flush_time = Time.now.to_i
      end
      sleep(1)
    end
  end
  content_server_dynamic_content_data = ContentData::DynamicContentData.new
  remote_content = ContentServer::RemoteContentClient.new(content_server_dynamic_content_data,
                                                          Params['content_server_hostname'],
                                                          Params['content_server_data_port'],
                                                          Params['backup_destination_folder'][0]['path'])
  all_threads.concat(remote_content.run())

  file_copy_client = FileCopyClient.new(Params['content_server_hostname'],
                                        Params['content_server_files_port'],
                                        @@local_dynamic_content_data)
  all_threads.concat(file_copy_client.threads)

  # Each
  Log.info('Start remote and local contents comparator')
  all_threads << Thread.new do
    loop do
      sleep(Params['backup_check_delay'])
      local_cd = @@local_dynamic_content_data.last_content_data()
      remote_cd = content_server_dynamic_content_data.last_content_data()
      diff = ContentData.remove(local_cd, remote_cd)

      Log.debug2("Backup content:\n#{local_cd}")
      Log.debug2("Remote content:\n#{remote_cd}")
      Log.debug2("Diff content:\n#{diff}")

      unless diff.nil? || diff.empty?
        Log.info('Start sync check. Backup and remote contents need a sync, requesting copy files:')
        Log.info("Missing contents:\n#{diff}")
        file_copy_client.request_copy(diff)
      else
        Log.info("Start sync check. Local and remote contents are equal. No sync required.")
      end
    end
  end

  # # # # # # # # # # # # # # # # # # # # # # # #
  # Start process vars thread
  if Params['enable_monitoring']
    monitoring_info = MonitoringInfo::MonitoringInfo.new()
    all_threads << Thread.new do
      mutex = Mutex.new
      while true do
        sleep(Params['process_vars_delay'])
        ::ContentServer::Globals.process_vars.set('time', Time.now)
        Log.debug3("process_vars:monitoring queue size:#{monitoring_events.size}")
        ::ContentServer::Globals.process_vars.set('monitoring queue', monitoring_events.size)
        #enable following line to see full list of object:count
        #obj_array = ''
        total_obj_count = 0
        string_count = 0
        file_count = 0
        dir_count = 0
        content_count = 0
        mutex.synchronize do
          ObjectSpace.each_object(Class) {|obj|
            obj_count_per_class = ObjectSpace.each_object(obj).count
            #enable following line to see full list of object:count
            #obj_array = "#{obj_array} * #{obj.name}:#{obj_count_per_class}"
            total_obj_count = total_obj_count + obj_count_per_class
          }
          string_count = ObjectSpace.each_object(String).count
          file_count = ObjectSpace.each_object(::FileMonitoring::FileStat).count
          dir_count = ObjectSpace.each_object(::FileMonitoring::DirStat).count
          content_count = ObjectSpace.each_object(::ContentData::ContentData).count
        end
        #enable following line to see full list of object:count
        #::ContentServer::Globals.process_vars.set('Live objs full', obj_array)
        Log.debug3("process_vars:Live objs cnt:#{total_obj_count}")
        ::ContentServer::Globals.process_vars.set('Live objs cnt', total_obj_count)
        Log.debug3("process_vars:Live String obj cnt:#{string_count}")
        Log.debug3("process_vars:Live File obj cnt:#{file_count}")
        Log.debug3("process_vars:Live Dir obj cnt:#{dir_count}")
        Log.debug3("process_vars:Live Content data obj cnt:#{content_count}")
        ::ContentServer::Globals.process_vars.set('Live String obj cnt', string_count)
      end
    end
  end

  all_threads.each { |t| t.abort_on_exception = true }
  all_threads.each { |t| t.join }
  # Should never reach this line.
end

.run_content_server ⇒ Object 



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# File 'lib/content_server/content_server.rb', line 35

def run_content_server
  Log.info('Content server start')
  all_threads = []

  # create general tmp dir
  FileUtils.mkdir_p(Params['tmp_path']) unless File.directory?(Params['tmp_path'])
  # init tmp content data file
  @@tmp_content_data_file = File.join(Params['tmp_path'], 'content.data')

  if Params['enable_monitoring']
    Log.info("Initializing monitoring of process params on port:#{Params['process_monitoring_web_port']}")
    ::ContentServer::Globals.process_vars.set('server_name', 'content_server')
  end

  # # # # # # # # # # # #
  # Initialize/Start monitoring
  Log.info('Start monitoring following directories:')
  Params['monitoring_paths'].each {|path|
    Log.info("  Path:'#{path['path']}'")
  }
  monitoring_events = Queue.new

  # Read here for initial content data that exist from previous system run
  initial_content_data = ContentData::ContentData.new
  content_data_path = Params['local_content_data_path']
  initial_content_data.from_file(content_data_path) if File.exists?(content_data_path)
  # Update local dynamic content with existing content
  @@local_dynamic_content_data = ContentData::DynamicContentData.new
  @@local_dynamic_content_data.update(initial_content_data)

  #Start files monitor taking into consideration  existing content  data
  fm = FileMonitoring::FileMonitoring.new(@@local_dynamic_content_data)
  fm.set_event_queue(monitoring_events)
  # Start monitoring and writing changes to queue
  all_threads << Thread.new do
    fm.monitor_files
  end

  # # # # # # # # # # # # # #
  # Initialize/Start local indexer
  Log.debug1('Start indexer')
  queue_indexer = QueueIndexer.new(monitoring_events, @@local_dynamic_content_data)
  # Start indexing on demand and write changes to queue
  all_threads << queue_indexer.run

  # # # # # # # # # # # # # # # # # # # # # # # #
  # Start dump local content data to file thread
  Log.debug1('Start dump local content data to file thread')
  all_threads << Thread.new do
    last_data_flush_time = nil
    while true do
      if last_data_flush_time.nil? || last_data_flush_time + Params['data_flush_delay'] < Time.now.to_i
        Log.info "Writing local content data to #{Params['local_content_data_path']}."
        @@local_dynamic_content_data.last_content_data.to_file(@@tmp_content_data_file)
        sleep(0.1)  # Added to prevent mv access issue
        ::FileUtils.mv(@@tmp_content_data_file, Params['local_content_data_path'])
        last_data_flush_time = Time.now.to_i
      end
      sleep(1)
    end
  end

  remote_content_client = RemoteContentServer.new(@@local_dynamic_content_data,
                                                  Params['local_content_data_port'])
  all_threads << remote_content_client.tcp_thread

  # # # # # # # # # # # # # # # #
  # Start copying files on demand
  Log.debug1('Start copy data on demand')
  copy_files_events = Queue.new  # TODO(kolman): Remove this initialization and merge to FileCopyServer.
  copy_server = FileCopyServer.new(copy_files_events, Params['local_files_port'])
  all_threads.concat(copy_server.run())

  # # # # # # # # # # # # # # # # # # # # # # # #
  # Start process vars thread
  if Params['enable_monitoring']
    monitoring_info = MonitoringInfo::MonitoringInfo.new()
    all_threads << Thread.new do
      last_data_flush_time = nil
      mutex = Mutex.new
      while true do
        sleep(Params['process_vars_delay'])
        ::ContentServer::Globals.process_vars.set('time', Time.now)
        Log.debug3("process_vars:monitoring queue size:#{monitoring_events.size}")
        ::ContentServer::Globals.process_vars.set('monitoring queue', monitoring_events.size)
        Log.debug3("process_vars:copy files events queue size:#{copy_files_events.size}")
        ::ContentServer::Globals.process_vars.set('copy files events queue', copy_files_events.size)
        #enable following line to see full list of object:count
        #obj_array = ''
        total_obj_count = 0
        string_count = 0
        file_count = 0
        dir_count = 0
        content_count = 0
        mutex.synchronize do
          ObjectSpace.each_object(Class) {|obj|
            obj_count_per_class = ObjectSpace.each_object(obj).count
            #enable following line to see full list of object:count
            #obj_array = "#{obj_array} * #{obj.name}:#{obj_count_per_class}"
            total_obj_count = total_obj_count + obj_count_per_class
          }
          string_count = ObjectSpace.each_object(String).count
          file_count = ObjectSpace.each_object(::FileMonitoring::FileStat).count
          dir_count = ObjectSpace.each_object(::FileMonitoring::DirStat).count
          content_count = ObjectSpace.each_object(::ContentData::ContentData).count
        end
        #enable following line to see full list of object:count
        #process_vars.set('Live objs full', obj_array)
        Log.debug3("process_vars:Live objs cnt:#{total_obj_count}")
        Log.debug3("process_vars:Live String obj cnt:#{string_count}")
        Log.debug3("process_vars:Live File obj cnt:#{file_count}")
        Log.debug3("process_vars:Live Dir obj cnt:#{dir_count}")
        Log.debug3("process_vars:Live Content data obj cnt:#{content_count}")
        ::ContentServer::Globals.process_vars.set('Live objs cnt', total_obj_count)
        ::ContentServer::Globals.process_vars.set('Live String obj cnt', string_count)
        ::ContentServer::Globals.process_vars.set('Live File obj cnt', file_count)
        ::ContentServer::Globals.process_vars.set('Live Dir obj cnt', dir_count)
        ::ContentServer::Globals.process_vars.set('Live Content data obj cnt', content_count)
      end
    end
  end
  # Finalize server threads.
  all_threads.each { |t| t.abort_on_exception = true }
  all_threads.each { |t| t.join }
  # Should never reach this line.
end

.tmp_content_data_file ⇒ Object 



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# File 'lib/content_server/backup_server.rb', line 31

def self.tmp_content_data_file
  @@tmp_content_data_file
end