Class: WDD::Utils::TimeGate

Inherits:
Object show all
Defined in:
lib/wdd-ruby-ext/utils/time_gate.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ TimeGate

Returns a new instance of TimeGate.



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# File 'lib/wdd-ruby-ext/utils/time_gate.rb', line 31

def initialize
  @gate_time = Time.now
end

Class Method Details

.elapsed_time(&block) ⇒ Object

Evaluated the passed block and returns the elapsed wall clock time.



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# File 'lib/wdd-ruby-ext/utils/time_gate.rb', line 37

def elapsed_time &block
  start_time = Time.now
  yield
  Time.now - start_time
end

.interruptable_sleep(sleep_time, guard_interval = 0.5) ⇒ Object

Sleeps the specified interval. If a block is passed, it will be evaluated every guard_interval seconds. If it evaluates to true, the sleep will be interrupted and control will be returned to the caller.



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# File 'lib/wdd-ruby-ext/utils/time_gate.rb', line 45

def interruptable_sleep sleep_time, guard_interval=0.5
  if block_given?
    while( yield && sleep_time > 0 ) 
      sleep guard_interval
      sleep_time -= guard_interval
    end
  else
    sleep sleep_time
  end
end

Instance Method Details

#set(seconds) ⇒ Object 



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# File 'lib/wdd-ruby-ext/utils/time_gate.rb', line 11

def set seconds
  @gate_time = Time.now + seconds
end

#wait(block = true) ⇒ Object

Waits until the gate is opened. block - true by default. If false, the method will not block, but will return the amount of time left before the gate opens. An optional Ruby block can be passed when block is true that will be evaluated every 0.5 seconds. If the block evaluates to false, the latch is released and this method returns.



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# File 'lib/wdd-ruby-ext/utils/time_gate.rb', line 20

def wait block = true
  if block
    guard = block_given? ? yield : true
    while Time.now < @gate_time && guard do
      sleep 0.5
    end
  else
    Time.now < @gate_time
  end
end