Class: Dasht::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/dasht/base.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Base

Returns a new instance of Base.



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# File 'lib/dasht/base.rb', line 17

def initialize
  @boards      = {}
  @log_threads = {}
  @metrics     = Metrics.new(self)
  @reloader    = Reloader.new(self)
  @rack_app    = RackApp.new(self)
end

Instance Attribute Details

#background ⇒ Object

Returns the value of attribute background.



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# File 'lib/dasht/base.rb', line 10

def background
  @background
end

#boards ⇒ Object

Returns the value of attribute boards.



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# File 'lib/dasht/base.rb', line 6

def boards
  @boards
end

#default_height ⇒ Object

Returns the value of attribute default_height.



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# File 'lib/dasht/base.rb', line 14

def default_height
  @default_height
end

#default_refresh ⇒ Object

Returns the value of attribute default_refresh.



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# File 'lib/dasht/base.rb', line 12

def default_refresh
  @default_refresh
end

#default_resolution ⇒ Object

Returns the value of attribute default_resolution.



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# File 'lib/dasht/base.rb', line 11

def default_resolution
  @default_resolution
end

#default_width ⇒ Object

Returns the value of attribute default_width.



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# File 'lib/dasht/base.rb', line 13

def default_width
  @default_width
end

#history ⇒ Object

Returns the value of attribute history.



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# File 'lib/dasht/base.rb', line 15

def history
  @history
end

#metrics ⇒ Object

Returns the value of attribute metrics.



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# File 'lib/dasht/base.rb', line 3

def metrics
  @metrics
end

#port ⇒ Object

Settings.



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# File 'lib/dasht/base.rb', line 9

def port
  @port
end

#rack_app ⇒ Object

Returns the value of attribute rack_app.



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# File 'lib/dasht/base.rb', line 4

def rack_app
  @rack_app
end

#reloader ⇒ Object

Returns the value of attribute reloader.



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# File 'lib/dasht/base.rb', line 5

def reloader
  @reloader
end

Instance Method Details

#board(name = "default") {|board| ... } ⇒ Object

Yields:



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# File 'lib/dasht/base.rb', line 74

def board(name = "default", &block)
  name = name.to_s
  board = @boards[name] = Board.new(self, name)
  yield(board) if block
  board
end

#interval(metric, &block) ⇒ Object 



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# File 'lib/dasht/base.rb', line 46

def interval(metric, &block)
  Thread.new do
    begin
      while true
        value = block.call
        metrics.set(metric, value, :last, Time.now.to_i) if value
      end
    rescue => e
      log e
      raise e
    end
  end
end

#log(s) ⇒ Object 



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# File 'lib/dasht/base.rb', line 25

def log(s)
  if s.class < Exception
    print "\n#{s}\n"
    print s.backtrace.join("\n")
  else
    print "\r#{s}\n"
  end
end

#reload(&block) ⇒ Object 



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# File 'lib/dasht/base.rb', line 102

def reload(&block)
  @boards = {}
  @log_threads.values.map(&:terminate)
  @log_threads = {}

  begin
    block.call(self)
  rescue => e
    log e
    raise e
  end

  @log_threads.values.map(&:run)
end

#run(&block) ⇒ Object

RUN & RELOAD ###



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# File 'lib/dasht/base.rb', line 83

def run(&block)
  if @already_running
    begin
      reload(&block)
    rescue => e
      log e
    end
    return
  end

  @already_running = true
  @reloader.run

  block.call(self)

  @log_threads.values.map(&:run)
  @rack_app.run(port)
end

#start(command) {|log_thread| ... } ⇒ Object

DATA INGESTION ###

Yields:

  • (log_thread) 


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# File 'lib/dasht/base.rb', line 36

def start(command, &block)
  log_thread = @log_threads[command] = LogThread.new(self, command)
  yield(log_thread) if block
  log_thread
end

#system_plugins_path ⇒ Object 



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# File 'lib/dasht/base.rb', line 66

def system_plugins_path
  File.join(File.dirname(__FILE__), "..", "..", "assets", "plugins")
end

#tail(path) ⇒ Object 



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# File 'lib/dasht/base.rb', line 42

def tail(path)
  start("tail -F -n 0 \"#{path}\"")
end

#user_plugins_path ⇒ Object 



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# File 'lib/dasht/base.rb', line 70

def user_plugins_path
  File.join(File.dirname($PROGRAM_NAME), "plugins")
end

#views_path ⇒ Object

DASHBOARD ###



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# File 'lib/dasht/base.rb', line 62

def views_path
  File.join(File.dirname(__FILE__), "..", "..", "views")
end